WO2020181431A1

WO2020181431A1 - Methods and apparatus for transmitting and receiving random access response, and system

Info

Publication number: WO2020181431A1
Application number: PCT/CN2019/077542
Authority: WO
Inventors: 路杨; 王昕�
Original assignee: 富士通株式会社; 路杨; 王昕�
Priority date: 2019-03-08
Filing date: 2019-03-08
Publication date: 2020-09-17

Abstract

Provided by the present invention are methods and apparatus for transmitting and receiving a random access response, and a communication system; the method for transmitting a random access response comprises: a network device receiving a first message sent by a terminal device, the first message containing a random access preamble and data, or the first message only containing a random access preamble; and the network device sending random access response indication information and a random access response to the terminal device, wherein the random access response indication information indicates that the random access response is a first random access response or a second random access response, the first random access response at least carrying an uplink transmission authorization allocated by the network device for the terminal device, and the second random access response at least carrying first contention resolution information for data of the first message. Thus, the terminal device may distinguish whether a received random access response is MsgB of 2-step RA or Msg2 of 4-step RA, thereby correctly performing a subsequent random access process.

Description

Random access response sending and receiving method, device and system

Technical field

The present invention relates to the field of communications, and in particular to a method, device and system for sending and receiving random access responses.

Background technique

In the fifth-generation new wireless key technical indicators (5G NR KPI) defined by the International Telecommunication Union (ITU), the connection density of the massive machine type communication (mMTC) scenario needs to reach 1 million terminal devices/square kilometer, which is ultra-high and reliable. The delay of the ultra-low delay service in URLLC needs to be less than 1ms. Among them, the mMTC scenario requires a low-cost, low-signaling overhead, low-latency, and low-power communication system, because a large number of uplink small data packet bursts generated by massive machine-type communication terminal equipment need to pass random The access is sent to the network, and if it is based on the traditional 4-step random access (4-step RA) method and orthogonal multiple access technology, the air interface signaling overhead and transmission delay are relatively large; similarly, the business of the uRLLC scenario is mainly It is a periodic or event-triggered small data packet, and random access is used to send uplink data with a high probability. The existing 4-step random access method cannot meet the requirements of low signaling overhead and low delay. In addition, for vehicle-to-vehicle communication (V2V) and enhanced mobile broadband (eMBB) application scenarios, there may also be small data packet services, and the transmission under the 4-step random access mode is also inefficient. In addition, in the unlicensed spectrum, because the channel access is based on the wireless fidelity (WiFi) carrier monitoring technology's listen before talk (LBT) mechanism, when the network device or terminal device detects that the channel is idle, that is, when the LBT is successful Before sending the signal, using the existing 4-step random access method will greatly affect the access success rate and access delay.

2-step random access (2-step RA) method and non-orthogonal multiple access technology are general solutions for reducing random access signaling overhead and delay, which can eliminate the uplink scheduling process during random access , Especially for small data packets and unlicensed frequency band services, there are obvious efficiency improvements. It can meet the needs of low cost, low power consumption, and massive small data packets in the application scenarios of massive large connection mMTC in the future, and meet the low latency and low power of frequent small data packets and random burst services in eMBB, uRLLC, V2V and other application scenarios Consumption requirements are generally applicable to random access to unlicensed spectrum and licensed spectrum.

It should be noted that the above introduction to the technical background is only set forth to facilitate a clear and complete description of the technical solutions of the present invention and to facilitate the understanding of those skilled in the art. It should not be considered that the above technical solutions are well-known to those skilled in the art just because these solutions are described in the background art part of the present invention.

Summary of the invention

The inventor found that in 2-step random access (2-step RA), after the terminal device sends the preamble, it may receive the 2-step RA random access response (MsgB) sent by the network device. A 4-step RA random access response (Msg2) may be received from the network device. Therefore, the terminal device may not be able to distinguish whether the received random access response is MsgB or Msg2, and thus cannot perform subsequent random access procedures. After the introduction of 2-step RA, the above-mentioned problems may also exist for terminal devices that initiate 4-step RA. In addition, in 2-step random access (2-step RA), the MsgA data sent by the terminal device may contain different content. According to the content of the MsgA data, the network device will send random access information containing different contention resolution information to the terminal device. Incoming response (MsgB), but the terminal device cannot recognize different MsgB, so it cannot correctly resolve the contention.

In order to solve at least one of the above-mentioned problems or solve other similar problems, embodiments of the present invention provide a method, device and system for sending and receiving a random access response.

According to the first aspect of the embodiments of the present invention, there is provided a method for sending a random access response, which is applied to a network device, wherein the method includes:

Receiving a first message sent by a terminal device, where the first message includes a random access preamble and data, or the first message only includes a random access preamble;

Sending random access response indication information and a random access response to the terminal device; the random access response indication information indicates that the random access response is the first random access response or the second random access response, the The first random access response at least carries the uplink transmission authorization allocated by the network device to the terminal device; the second random access response carries at least the first contention resolution information for the data of the first message.

According to a second aspect of the embodiments of the present invention, there is provided a method for receiving a random access response, which is applied to a terminal device, wherein the method includes:

Sending a first message to the network device, where the first message includes a random access preamble and data, or the first message only includes a random access preamble;

Receiving a random access response and random access response indication information sent by the network device, and determining whether the random access response is a first random access response or a second random access response according to the random access response indication information; The first random access response carries at least the uplink transmission authorization allocated by the network device to the terminal device; the second random access response carries at least the first contention resolution information for the data of the first message.

According to a third aspect of the embodiments of the present invention, there is provided an apparatus for sending a random access response, which is configured in a network device, wherein the apparatus includes:

A receiving unit, which receives a first message sent by a terminal device, where the first message includes a random access preamble and data, or the first message only includes a random access preamble;

A sending unit, which sends random access response indication information and a random access response to the terminal device; the random access response indication information indicates that the random access response is the first random access response or the second random access In response, the first random access response carries at least the uplink transmission authorization allocated by the network device to the terminal device; the second random access response carries at least the first contention resolution for the data of the first message information.

According to a fourth aspect of the embodiments of the present invention, there is provided a random access response receiving apparatus, which is configured in a terminal device, wherein the apparatus includes:

A sending unit, which sends a first message to the network device, where the first message includes a random access preamble and data, or the first message only includes a random access preamble;

A receiving unit, which receives the random access response and random access response indication information sent by the network device, and determines whether the random access response is the first random access response or the second random access response according to the random access response indication information Access response; the first random access response carries at least the uplink transmission authorization allocated by the network device to the terminal device; the second random access response carries at least the first data for the first message Competition resolution information.

According to a fifth aspect of the embodiments of the present invention, there is provided a method for sending a random access response, which is applied to a network device, wherein the method includes:

Receiving a first message sent by a terminal device, where the first message includes a random access preamble and data;

Sending random access response indication information and random access response to the terminal device; the random access response indication information indicates that the random access response is the second random access response or the third random access response, the The second random access response carries at least first contention resolution information for the data of the first message, and the third random access response carries at least second contention resolution information for the data of the first message.

According to a sixth aspect of the embodiments of the present invention, there is provided a method for receiving a random access response, which is applied to a terminal device, wherein the method includes:

Sending a first message to the network device, where the first message includes a random access preamble and data;

Receiving a random access response and random access response indication information sent by the network device, and determining, according to the random access response indication information, that the random access response is a second random access response or a third random access response; The second random access response carries at least first contention resolution information for the data of the first message, and the third random access response carries at least second contention resolution information for the data of the first message.

According to a seventh aspect of the embodiments of the present invention, there is provided a random access response sending device, which is configured in a network device, wherein the device includes:

A receiving unit, which receives a first message sent by a terminal device, the first message including a random access preamble and data;

A sending unit, which sends random access response indication information and a random access response to the terminal device; the random access response indication information indicates that the random access response is a second random access response or a third random access In response, the second random access response carries at least the first contention resolution information for the data of the first message, and the third random access response carries at least the second contention resolution information for the data of the first message information.

According to an eighth aspect of the embodiments of the present invention, there is provided a random access response receiving apparatus, which is configured in a terminal device, wherein the apparatus includes:

A sending unit that sends a first message to the network device, where the first message includes a random access preamble and data;

A receiving unit, which receives random access response and random access response indication information sent by the network device;

A determining unit, which determines, according to the random access response indication information, that the random access response is a second random access response or a third random access response; the second random access response carries at least information specific to the first random access response; The first contention resolution information of the data of the message, and the third random access response carries at least second contention resolution information for the data of the first message.

According to a ninth aspect of the embodiments of the present invention, there is provided a network device, wherein the network device includes the device described in the foregoing third aspect or seventh aspect.

According to a tenth aspect of the embodiments of the present invention, there is provided a terminal device, wherein the terminal device includes the device described in the foregoing fourth aspect or the eighth aspect.

According to an eleventh aspect of the embodiments of the present invention, a communication system is provided, and the communication system includes the network device described in the aforementioned ninth aspect and the terminal device described in the aforementioned tenth aspect.

According to other aspects of the embodiments of the present invention, a computer-readable program is provided, wherein when the program is executed in a network device, the program causes a computer to execute the aforementioned first aspect or fifth aspect in the network device The method described.

According to other aspects of the embodiments of the present invention, there is provided a storage medium storing a computer-readable program, wherein the computer-readable program enables a computer to execute the method described in the first aspect or the fifth aspect in a network device.

According to other aspects of the embodiments of the present invention, a computer-readable program is provided, wherein when the program is executed in a terminal device, the program causes the computer to execute the aforementioned second aspect or sixth aspect in the terminal device. The method described.

According to other aspects of the embodiments of the present invention, there is provided a storage medium storing a computer-readable program, wherein the computer-readable program enables a computer to execute the method described in the foregoing second aspect or sixth aspect in a terminal device.

The beneficial effects of the embodiments of the present invention are: according to at least one aspect of the first to fourth aspects of the embodiments of the present invention, in 2-step RA or 4-step RA, the network device indicates the type of random access response to the terminal device It is used for the terminal device to distinguish whether the received random access response is the MsgB of 2-step RA or the Msg2 of 4-step RA, so as to correctly execute the subsequent random access process. According to at least one aspect of the fifth to eighth aspects of the embodiments of the present invention, in 2-step RA, the network device indicates the type of the random access response to the terminal device for the terminal device to distinguish that the received random access response contains The contention resolution information can be used to correctly perform the subsequent random access process.

With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the ways in which the principles of the present invention can be adopted. It should be understood that the scope of the embodiments of the present invention is not limited thereby. Within the spirit and scope of the terms of the appended claims, the embodiments of the present invention include many changes, modifications and equivalents.

Features described and/or shown for one embodiment can be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or substituted for features in other embodiments .

It should be emphasized that the term "comprising/comprising" when used herein refers to the existence of features, components, steps or components, but does not exclude the existence or addition of one or more other features, components, steps or components.

Description of the drawings

The elements and features described in one drawing or one embodiment of the embodiment of the present invention may be combined with the elements and features shown in one or more other drawings or embodiments. In addition, in the drawings, similar reference numerals indicate corresponding parts in several drawings, and may be used to indicate corresponding parts used in more than one embodiment.

The included drawings are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the text description, explain the principle of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor. In the attached picture:

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present invention;

Figure 2 is a schematic diagram of a 4-step random access method;

Figure 3 is a schematic diagram of a 2-step random access method;

Figure 4 is a schematic diagram of a fallback from 2-step random access to 4-step random access;

FIG. 5 is a schematic diagram of a method for sending a random access response in Embodiment 1;

Figure 6 is a schematic diagram of a random access response transmission block;

FIG. 7 is a schematic diagram of the format of the MAC subPDU including the random access response indication MAC CE;

Figure 8 is another schematic diagram of a random access response transmission block;

Figure 9 is a schematic diagram of the first random access response;

Figure 10 is a schematic diagram of a second random access response;

Figure 11 is another schematic diagram of a random access response transmission block;

FIG. 12 is a schematic diagram of the format of the subheader of the random access response MAC subPDU;

Figure 13 is another schematic diagram of a random access response transmission block;

FIG. 14 is a schematic diagram of the format of the MAC subPDU subheader of the random access response indication MAC CE;

FIG. 15 is another schematic diagram of the first random access response;

FIG. 16 is another schematic diagram of the second random access response;

Figure 17 is a schematic diagram of the third random access response;

18 is a schematic diagram of the format of the subheader of the MAC SubPDU of the random access response;

FIG. 19 is a schematic diagram of the random access response receiving method of Embodiment 2;

20 is a schematic diagram of a method for sending a random access response in Embodiment 3;

21 is a schematic diagram of a method for receiving a random access response in Embodiment 4;

FIG. 22 is a schematic diagram of a random access response sending apparatus of Embodiment 5;

FIG. 23 is a schematic diagram of a random access response receiving apparatus of Embodiment 6;

FIG. 24 is a schematic diagram of a random access response sending device of Embodiment 7;

25 is a schematic diagram of a random access response receiving apparatus of Embodiment 8;

FIG. 26 is a schematic diagram of a network device of Embodiment 9;

FIG. 27 is a schematic diagram of a terminal device of Embodiment 10.

detailed description

With reference to the drawings, the foregoing and other features of the present invention will become apparent through the following description. In the specification and drawings, specific embodiments of the present invention are specifically disclosed, which indicate some embodiments in which the principles of the present invention can be adopted. It should be understood that the present invention is not limited to the described embodiments. On the contrary, the present invention The invention includes all modifications, variations and equivalents falling within the scope of the appended claims.

In the embodiments of the present invention, the terms "first", "second", etc. are used to distinguish different elements in terms of appellations, but they do not indicate the spatial arrangement or temporal order of these elements. These elements should not be used by these terms. Limited. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having" and the like refer to the existence of the stated features, elements, elements or components, but do not exclude the presence or addition of one or more other features, elements, elements or components.

In the embodiments of the present invention, the singular forms "a", "the", etc. include plural forms, which should be broadly understood as "a" or "a type" rather than being limited to the meaning of "a"; in addition, the term "so" "Said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. In addition, the term "based on" should be understood as "based at least in part on..." and the term "based on" should be understood as "based at least in part on..." unless the context clearly dictates otherwise.

In the embodiments of the present invention, the term "communication network" or "wireless communication network" can refer to a network that complies with any of the following communication standards, such as Long Term Evolution (LTE), and Enhanced Long Term Evolution (LTE-A, LTE-A). Advanced), Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access), High-Speed Packet Access (HSPA, High-Speed Packet Access), etc.

Moreover, the communication between devices in the communication system can be carried out according to any stage of communication protocol, for example, it can include but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and future 5G, New Radio (NR, New Radio), etc., and/or other currently known or future communication protocols.

In the embodiment of the present invention, the term "network device" refers to, for example, a device in a communication system that connects a terminal device to a communication network and provides services for the terminal device. Network equipment may include but is not limited to the following equipment: base station (BS, Base Station), access point (AP, Access Point), transmission and reception point (TRP, Transmission Reception Point), broadcast transmitter, mobile management entity (MME, Mobile Management Entity), gateway, server, radio network controller (RNC, Radio Network Controller), base station controller (BSC, Base Station Controller), etc.

Among them, the base station may include but is not limited to: Node B (NodeB or NB), evolved Node B (eNodeB or eNB), 5G base station (gNB), etc., and may also include remote radio head (RRH, Remote Radio Head) , Remote Radio Unit (RRU, Remote Radio Unit), relay (relay) or low-power node (such as femto, pico, etc.). And the term "base station" can include some or all of their functions, and each base station can provide communication coverage for a specific geographic area. The term "cell" may refer to a base station and/or its coverage area, depending on the context in which the term is used.

In the embodiment of the present invention, the term "User Equipment" (UE, User Equipment) refers to, for example, a device that accesses a communication network through a network device and receives network services, and may also be referred to as "Terminal Equipment" (TE, Terminal Equipment). The terminal equipment can be fixed or mobile, and can also be called a mobile station (MS, Mobile Station), terminal, user, subscriber station (SS, Subscriber Station), access terminal (AT, Access Terminal), station, etc. Wait.

Among them, terminal devices may include but are not limited to the following devices: cellular phones (Cellular Phone), personal digital assistants (PDAs, Personal Digital Assistant), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, Cordless phones, smart phones, smart watches, digital cameras, etc.

For another example, in scenarios such as the Internet of Things (IoT), a terminal device may also be a machine or device that performs monitoring or measurement. For example, it may include, but is not limited to: Machine Type Communication (MTC) terminals, Vehicle-mounted communication terminals, device to device (D2D, Device to Device) terminals, machine to machine (M2M, Machine to Machine) terminals, etc.

The following describes the scenario of the embodiment of the present invention through an example, but the embodiment of the present invention is not limited to this.

FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present invention, which schematically illustrates a case where a terminal device and a network device are taken as an example. As shown in FIG. 1, the communication system 100 may include: a network device 101 and a terminal device 102. For the sake of simplicity, Figure 1 only uses one terminal device as an example for illustration. The network device 101 is, for example, the network device gNB in the NR system.

In the embodiment of the present invention, existing services or services that can be implemented in the future can be performed between the network device 101 and the terminal device 102. For example, these services include but are not limited to: enhanced mobile broadband (eMBB, enhanced Mobile Broadband), large-scale machine type communication (mMTC, massive Machine Type Communication), and high-reliability and low-latency communication (URLLC, Ultra-Reliable and Low- Latency Communication), etc.

Wherein, the terminal device 102 may send data to the network device 101, for example, using an unauthorized transmission mode. The network device 101 can receive data sent by one or more terminal devices 102, and feedback information (for example, acknowledgement ACK/non-acknowledgement NACK) information to the terminal device 102, and the terminal device 102 can confirm the end of the transmission process according to the feedback information, or can further Perform new data transmission, or data retransmission can be performed.

Figure 2 is a schematic diagram of the 4-step random access (4-step RA) method. As shown in Figure 2, in 4-step RA, the first step is that the terminal device selects the preamble for random access. The preamble (Msg1) is sent in the configured contention-based random access opportunity (RO, Random access Occasion); in the second step, the network device will send a random access response (RAR, Random Access Response) (Msg2) after receiving the preamble. ), the terminal device that is authorized to send the preamble has a dedicated uplink resource (such as PUSCH resource) and allocates a temporary CRNTI (TC-RNTI) to indicate the uplink advance of the PUSCH; the third step, the terminal device sends the carrying signaling on the PUSCH resource Or a data message (msg3); the fourth step, if the msg3 is successfully received, the network device sends the contention resolution signaling (msg4) for the msg3 to the terminal device.

Figure 3 is a schematic diagram of a 2-step random access method (2-step RA). As shown in Figure 3, in the 2-step RA, the first step, the terminal device sends MsgA, and MsgA contains the preamble for random access (Referred to as MsgA preamble) and data part (MsgA signaling or service data, payload, referred to as MsgA data for short), the terminal device can send MsgA preamble in the competing RO and send MsgA signaling in the competing PUSCH resource Or service data; the second step, the network device sends MsgB after receiving MsgA, and sends random access response and contention resolution message to the terminal device through the MsgB. Therefore, in the 2-step random access mode, the terminal device can transmit without uplink scheduling during the random access process, upload signaling or service data in one step, and reduce random access signaling and time delay.

On the other hand, the network equipment can demodulate the MsgA data through the demodulation reference signal (DMRS, Demodulation Reference Signal) sent on the PUSCH resource of the MsgA data, where the DMRS sequence is the same as the sequence index used by the MsgA preamble sent by the terminal device ( index) related, the network device can obtain the DMRS corresponding to the preamble sequence index (preamble index) according to the preamble demodulated in the RO resource. In addition, if multiple terminal devices select different preamble sequence indexes (preamble index) in 2-step RA and transmit MsgA data on the same PUSCH resource, the network device can demodulate the DMRS corresponding to the preamble sequence index (preamble index) Output MsgA data.

However, because the demodulation performance of the preamble is higher than the demodulation of different PUSCH data based on DMRS on the PUSCH resource, it may happen that the network device can successfully demodulate the MsgA preamble, but the demodulation of the MsgA data fails. -Step RA fails and falls back to 4-step RA, the network device will send a 4-step RA random access response (Msg2) to the terminal device, causing the terminal device to resend the MsgA data. Alternatively, the network device may also configure the terminal device to fall back from 2-step RA to 4-step RA according to the network status or other conditions. At this time, after the network device receives the MsgA sent by the terminal device, it does not matter whether the MsgA data is resolved or not. If the adjustment is successful, it will send a 4-step RA random access response (Msg2) to the terminal device, so that the terminal device will fall back to 4-step RA.

Figure 4 is a schematic diagram of rollback from 2-step RA to 4-step RA. As shown in Figure 4, after receiving the MsgA sent by the terminal device, the network device feeds back Msg2 to the terminal device. Therefore, the random access process starts from 2-step RA is rolled back to 4-step RA, and the subsequent process is the same as 4-step RA.

Various embodiments of the present invention will be described below in conjunction with the drawings. These embodiments are only exemplary, and are not limitations to the present invention.

Example 1

This embodiment provides a method for sending a random access response, and the method is applied to a network device. Fig. 5 is a schematic diagram of a method for sending a random access response in this embodiment. Please refer to Fig. 5, the method includes:

Step 501: Receive a first message sent by a terminal device, where the first message includes a random access preamble and data, or the first message only includes a random access preamble;

Step 502: Send random access response indication information and random access response to the terminal device; the random access response indication information indicates that the random access response is the first random access response or the second random access response The first random access response carries at least the uplink transmission authorization allocated by the network device to the terminal device; the second random access response carries at least first contention resolution information for the data of the first message .

In this embodiment, the foregoing first message may also be called a random access request, which may be MsgA in a 2-step random access process, including the foregoing random access preamble and the foregoing data (payload), such as As shown in Figure 3; it can also be Msg1 in the 4-step random access process, which only includes the aforementioned random access preamble, as shown in Figure 2.

In this embodiment, in 2-step RA or 4-step RA, in addition to sending a random access response to the terminal device, the network device also sends random access response indication information to the terminal device. Whether the access response is the first random access response or the second random access response, the terminal device can distinguish the type of the random access response, and perform corresponding operations accordingly, so as to correctly execute the subsequent random access process.

In an embodiment, the first message includes a random access preamble and data, and the random access response indication information indicates that the random access response is the first random access response or the second random access response. The uplink transmission authorization carried in the first random access response is used for the terminal device to retransmit the data of the first message.

In this embodiment, the network device may determine the random access response indication information and the random access response based on whether the data of the first message is correctly analyzed.

For example, in 2-step RA, if the network device cannot correctly parse the data of the first message (the data part of MsgA), the network device may send the random access response indication information and the first random access response to the terminal device (Similar to Msg2 in 4-step RA), the terminal device is instructed to receive the first random access response through the random access response indication information. Wherein, the first random access response carries at least the uplink transmission authorization allocated by the network device to the terminal device, and the uplink transmission authorization is used for the terminal device to retransmit the data of the above-mentioned first message. Therefore, the terminal device falls back to 4-step RA. In addition, the first random access response may also carry a transmission time advance command (TAC), and the terminal device may adjust the data transmission advance according to the transmission time advance command; the first random access response may also carry TC-RNTI, The terminal equipment scrambles uplink data and receives msg4 PDCCH.

For another example, in 2-step RA, if the network device can correctly parse the data of the first message (the data part of MsgA), the network device may send the random access response indication information and the second random access to the terminal device. In response (ie, MsgB in 2-step RA), the random access response instructs the terminal device to receive the second random access response. Wherein, the second random access response at least carries contention resolution information (referred to as first contention resolution information) for the data of the first message, and is used for the terminal device to perform contention resolution accordingly. In addition, the second random access response may also carry a transmission time advance command (TAC), and the terminal device may adjust the data transmission advance according to the transmission time advance command; the second random access response may also carry C-RNTI, uplink Transmission of authorization or downlink data.

In this embodiment, the network device may not determine the random access response indication information and the random access response based on whether the data of the first message is correctly parsed, but may determine the random access response according to the network status or other conditions. Indication information and the aforementioned random access response.

In another embodiment, the first message only includes a random access preamble, the random access response indication information indicates that the random access response is the first random access response, and the first random access response carries The above uplink transmission authorization is used for the terminal device to send new data.

For example, in 4-step RA, the network device sends the foregoing random access response indication information and the foregoing first random access response to the terminal device, and instructs the terminal device to receive the first random access response through the random access response indication information. Wherein, the first random access response at least carries the above-mentioned uplink transmission authorization, and the uplink transmission authorization is used for the terminal device to send new data. In addition, the first random access response may also carry TC-RNTI or TAC.

In this embodiment, the foregoing random access response indication information may be indication information of the physical layer, or indication information of the medium access control (MAC) layer.

For example, the indication information of the physical layer may include at least one of the following:

A radio network temporary identifier (RNTI) used to scramble the cyclic redundancy check (CRC) of the physical downlink control channel (PDCCH) for scheduling the random access response;

The content of the PDCCH for scheduling the random access response; and

The format of the PDCCH for scheduling the random access response.

In this example, the network device may use at least one of the above RNTI, the content of the PDCCH, and the format of the PDCCH as the random access response indication information to indicate the type of the random access response.

For another example, the indication information of the MAC layer may include at least one of the following:

The Medium Access Control Control Unit (MAC CE) included in the random access response transmission block;

The content of the random access response contained in the random access response transmission block; and

The random access response subheader included in the random access response transmission block.

In this example, the network device can use at least one of the MAC CE, the content of the random access response, and the subheader of the random access response as the random access response indication information to indicate the random access response. Types of.

The following describes the foregoing random access response indication information through several examples.

In an example, the foregoing random access response indication information is the foregoing RNTI, and the network device sending the random access response indication information to the terminal device may include:

The network device sends the PDCCH for scheduling the random access response to the terminal device, the CRC of the PDCCH is scrambled with the first RNTI or the second RNTI, and the first RNTI indicates that the random access response is the first random access. Incoming response, the second RNTI indicates that the random access response is the second random access response. Therefore, after receiving the PDCCH, the terminal device can determine whether the random access response is the first random access response or the second random access response according to the RNTI that scrambles the CRC of the PDCCH.

For example, after receiving the 2-step RA random access preamble of MsgA sent by the terminal device, the network device can determine whether the data part of the MsgA can be correctly parsed.

If the data part of MsgA cannot be parsed correctly, the network device sends the first random access response (similar to Msg2 of 4-step RA) to the terminal device and uses the first RNTI to scramble and schedule the CRC of the PDCCH of the first random access response .

If the data part of MsgA can be correctly parsed, the network device sends a second random access response (MsgB) to the terminal device and uses the second RNTI to scramble and schedule the CRC of the PDCCH of the MsgB. The processing on the terminal device side will be described in Embodiment 2.

For another example, after receiving the 4-step RA random access preamble sent by the terminal device, the network device sends a first random access response (similar to Msg2 of 4-step RA) to the terminal device, and uses the first RNTI The CRC of the PDCCH scheduling the first random access response is scrambled.

In this example, the above-mentioned first RNTI and the above-mentioned second RNTI are different from each other, and may be related to the time-frequency resource position of the physical random access channel (PRACH) for sending the preamble by the terminal device and the type of random access response sent. For example, the first RNTI and the RNTI can be calculated according to the following formula:

RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×rar_id

In the above formula, s_id (0≤s_id<14) is the number of the first OFDM symbol of PRACH in the slot; t_id (0≤t_id<80) is the first PRACH in the system frame Slot number; f_id (0≤f_id<8) is the resource location index of PRACH in the frequency domain; ul_carrier_id (0 or 1) is the identifier of the uplink carrier that sends the preamble, for example, 0 means normal uplink carrier, 1 represents the supplementary uplink carrier; rar_id is the random access response identifier, for example, 0 represents the first random access response, and 1 represents the second random access response. The above formula is only an example, and this embodiment does not limit the calculation method of the first RNTI and the second RNTI.

In this example, a transport block (TB) does not contain the first and second random access responses at the same time, the CRC of the PDCCH of the TB that is scheduled to include the first random access response is scrambled with the first RNTI, and the scheduling includes the second random access response. The CRC of the PDCCH of the access response TB is scrambled with the second RNTI. The terminal equipment simultaneously detects the PDCCH scrambled by the first and second RNTI. As shown in Figure 6, two terminal devices (UE A and UE B) simultaneously send MsgA preamble on a PRACH and send MsgA data on the physical uplink shared channel (PUSCH) corresponding to the PRACH, and the network device successfully decodes the UE MsgA data sent by B, but failed to demodulate the MsgA data sent by UE A. The network device sends a first random access response for UE A in one TB (RA response a), and sends a second random access response for UE B in another TB (RA response b).

In this example, the first RNTI and the second RNTI may be RA-RNTI, but this embodiment is not limited to this, and the RNTI may also be other types of RNTI, such as C-RNTI.

In another example, the foregoing random access response indication information is the content of the foregoing PDCCH, and sending the random access response indication information by the network device to the terminal device may include:

The network device sends a PDCCH for scheduling the random access response to the terminal device, where the PDCCH includes first indication information, and the first indication information indicates that the random access response is the first random access response or the second random access response. Into the response. Therefore, after receiving the PDCCH, the terminal device can determine whether the random access response is the first random access response or the second random access response according to the content in the PDCCH.

If the data part of MsgA cannot be parsed correctly, the network device sends the first random access response (similar to Msg2 of 4-step RA) to the terminal device and uses the content of the PDCCH (first indication information) that schedules the first random access response ) Indicates the first random access response.

If the data part of MsgA can be correctly parsed, the network device sends a second random access response (MsgB) to the terminal device and uses the content (first indication information) of the PDCCH scheduling the MsgB to indicate the second random access response.

For another example, after receiving the 4-step RA random access preamble sent by the terminal device, the network device sends a first random access response to the terminal device, and uses the content of the PDCCH that schedules the first random access response ( The first indication information) indicates the first random access response.

The processing on the terminal device side will be described in Embodiment 2.

In this example, the same RNTI can be used to scramble the CRC of the PDCCH of the first random access response and the second random access response, and the PDCCH can use the same PDCCH format.

In this example, the first indication information may occupy one bit of the PDCCH, and different values are used to distinguish whether the random access response is the first random access response or the second random access response. For example, when the value of the first indication information is 0, it indicates that the random access response is the first random access response; when the value of the first indication information is 1, it indicates that the random access response is the second random access response. Access response.

The following Table 1 is an example of the PDCCH containing the first indication information indicating the first random access response.

Table 1

In the example in Table 1, the format of the PDCCH is DCI format 1_0, and the CRC of the PDCCH is scrambled by RA-RNTI, and the DCI field of the PDCCH contains 1-bit random access response indication information for Indicates the type of random access response.

The following Table 2 is an example of the PDCCH containing the first indication information indicating the second random access response.

Table 2

In the example of Table 2, the format of the PDCCH is DCI format 1_0, and the CRC of the PDCCH is scrambled by RA-RNTI, and the DCI field of the PDCCH contains 1-bit random access response indication information for Indicates the type of random access response.

In another example, the foregoing random access response indication information is in the format of the foregoing PDCCH, and the network device sending the random access response indication information to the terminal device may include:

The network device sends a PDCCH for scheduling the random access response to the terminal device, where the PDCCH is in the first format or the second format, the first format indicates that the random access response is the first random access response, and the second format It indicates that the random access response is the second random access response. Therefore, after receiving the PDCCH, the terminal device can determine whether the random access response is the first random access response or the second random access response according to the format of the PDCCH.

If the data part of MsgA cannot be parsed correctly, the network device sends the first random access response (similar to Msg2 of 4-step RA) to the terminal device and uses the PDCCH format for scheduling the first random access response (for example, the first format) ) Indicates the first random access response.

If the data part of the MsgA can be correctly parsed, the network device sends a second random access response (MsgB) to the terminal device and uses the format (for example, the second format) of the PDCCH scheduling the MsgB to indicate the second random access response. The processing on the terminal device side will be described in Embodiment 2.

In this example, the same RNTI can be used to scramble the CRC of the PDCCH of the first random access response and the second random access response, and the PDCCH can use different PDCCH formats, and different PDCCH format codes. The number of bits is different. For example, the PDCCH of the first random access response uses DCI format 1_0, and the PDCCH of the second random access response uses a new format, such as DCI format 1_x (x>1).

In another example, the foregoing random access response indication information is the foregoing MAC CE, and the network device sending the random access response indication information to the terminal device may include:

The random access response transmission block sent by the network device to the terminal device includes the MAC CE, and the MAC CE includes second indication information. The second indication information indicates that the random access response is the first random access response or the above Second random access response. Therefore, the terminal device can determine whether the random access response is the first random access response or the second random access response according to the MAC CE in the received random access response transmission block.

If the data part of MsgA cannot be parsed correctly, the network device sends a random access response indication MAC CE and the first random access response (similar to Msg2 in 4-step RA) indicating the first random access response to the terminal device.

If the data part of MsgA can be correctly parsed, the network device sends a random access response indication MAC CE and the second random access response (MsgB) indicating the second random access response to the terminal device.

For another example, after receiving the 4-step RA random access preamble sent by the terminal device, the network device sends the terminal device a random access response indication MAC CE and the first random access response to the terminal device. response.

The processing on the terminal device side will be described in Embodiment 2.

In this example, the second indication information may occupy one bit. When the value of the second indication information is the first value, for example, 0, the random access response is the aforementioned first random access response; When the value of the second indication information is the second value, for example, when it is 1, the random access response is the foregoing second random access response. Therefore, the type of random access response is indicated by the one-bit information.

Figure 7 is an example of the MAC subPDU format of the random access response indication MAC CE. As shown in Figure 7, the MAC CE only contains a 1-byte MAC subPDU subheader, of which 2 bits (E/T) can be transmitted. Other control information, for example, used to distinguish the random access response indication MAC CE subPDU and other types of subPDU; 1 bit is used to indicate the type of random access response, for example, 0 identifies the first random access response, 1 identifies the second Random access response; the remaining bits are reserved bits ("R" bits).

In this example, one random access response transmission block may include multiple MAC CEs and random access responses corresponding to each MAC CE, where each MAC CE is immediately followed by its corresponding random access response. In addition, all the random access response indication MAC CE and the first random access response indicating the first random access response can be placed in the random access response indication indicating the second random access response in the transmission block of the MAC layer. Before MAC CE and the second random access response.

For example, a random access response transmission block (TB) may contain both the first random access response and the second random access response. As shown in Figure 8, two terminal devices (UE A and UE B) simultaneously send MsgA preamble on a PRACH and send MsgA data on the PUSCH corresponding to the PRACH, and the network device successfully decodes the MsgA data sent by UE B. But it failed to demodulate UE A's MsgA data. The network device sends the random access response MAC CE and the first random access response for UE A, and the random access response MAC CE and the second random access response for UE B in the same TB.

In another example, the foregoing random access response indication information is the content of the foregoing random access response, and sending the random access response indication information by the network device to the terminal device may include:

The content of the random access response sent by the network device to the terminal device includes third indication information, which indicates that the random access response is the first random access response or the second random access response. Therefore, the terminal device can determine whether the random access response is the first random access response or the second random access response according to the content contained in the random access response.

If the data part of MsgA cannot be parsed correctly, the network device sends a first random access response (similar to Msg2 in 4-step RA) to the terminal device, and the content of the first random access response contains the above-mentioned third indication information. To indicate the first random access response.

If the data part of MsgA can be correctly parsed, the network device sends a second random access response (MsgB) to the terminal device. The content of the second random access response includes the above-mentioned third indication information for indicating the second random access response .

For another example, after receiving the 4-step RA random access preamble sent by the terminal device, the network device sends a first random access response to the terminal device, and the content of the first random access response includes the foregoing third indication The information is used to indicate the first random access response.

The processing on the terminal device side will be described in Embodiment 2.

In this example, the third indication information may occupy one bit. When the value of the third indication information is a third value, for example, 0, the random access response is the first random access response; When the value of the third indication information is a fourth value, for example, when it is 1, the random access response is the second random access response.

For example, the third indication information may be a preset control bit in the content of the random access response, and one control bit is used in the content of the random access response to indicate whether the following is the first random access response or the second random access response. Access response.

FIG. 9 is a schematic diagram of the first random access response. In this example, the control bit C=0 is used to indicate the first random access response. Fig. 10 is a schematic diagram of the second random access response. In this example, the control bit C=1 is used to indicate the second random access response. In addition, the content of the second random access response may not include UL grant, C-RNTI, TAC, etc. shown in FIG. 10. In addition, all the first random access responses can be placed before the second random access responses in the transmission block of the MAC layer.

For example, one random access transmission block (TB) may contain both the first random access response and the second random access response. As shown in Figure 11, two terminal devices (UE A and UE B) simultaneously send MsgA preamble on a PRACH and send MsgA data on the PUSCH corresponding to the PRACH, and the network device successfully decodes the MsgA data sent by UE B. But it failed to demodulate UE A's MsgA data. The network device sends the first random access response for UE A and the second random access response for UE B in the same TB, and the content of each random access response carries third indication information (control bit) indication Random access type.

In another example, the foregoing random access response indication information is a subheader of the foregoing random access response, and sending the random access response indication information by the network device to the terminal device may include:

The subheader of the MAC layer sub-PDU of the random access response sent by the network device to the terminal device contains fourth indication information, which indicates that the random access response is the first random access response or the second random access response. Random access response. Therefore, the terminal device can determine whether the random access response is the first random access response or the second random access response according to the subheader of the random access response.

If the data part of MsgA cannot be parsed correctly, the network device sends a first random access response (similar to Msg2 in 4-step RA) to the terminal device, and the subheader of the MAC subPDU containing the first random access response contains the above The fourth indication information is used to indicate the first random access response.

If the data part of MsgA can be correctly parsed, the network device sends a second random access response (MsgB) to the terminal device. The subheader of the MAC subPDU containing the second random access response contains the fourth indication information for indicating the first 2. Random access response.

For another example, after receiving the 4-step RA random access preamble sent by the terminal device, the network device sends a first random access response to the terminal device, including the subheader of the MAC subPDU of the first random access response The fourth indication information is used to indicate the first random access response.

The processing on the terminal device side will be described in Embodiment 2.

In this example, the above subheader may occupy 2 bytes, and the fourth indication information may occupy one bit. When the value of the fourth indication information is the fifth value, for example, 0, the random access response is The first random access response; when the value of the fourth indication information is a sixth value, for example, 1, the random access response is the second random access response.

For example, the fourth indication information may be a control bit preset in the subheader, and one control bit is used in the subheader to indicate whether the following is the first random access response or the second random access response. In addition, all the subPDUs of the first random access response can be placed before the subPDUs of the second random access response in the transmission block of the MAC layer.

Figure 12 is an example of the subheader of the MAC SubPDU of the random access response. As shown in Figure 12, the subheader consists of 2 bytes, and the control information indicating the type of the random access response (the "C" bit in the figure) ) Occupies 1 bit, "0" can be used to identify the first random access response, and "1" can be used to identify the second random access response. The remaining positions can be used to transmit the preamble identification and other control information. The preamble identifier can occupy 6 bits, as shown in "PAPID" in Figure 12. Other control information is used, for example, to distinguish the random access response subPDU from the control information of other types of subPDUs, such as the "E"/"T" bits shown in FIG. 12. Unused positions can be filled with reserved bits "R".

For example, a random access response transmission block (TB) may contain both the first random access response and the second random access response. As shown in Figure 13, two terminal devices (UE A and UE B) simultaneously send MsgA preamble on a PRACH and send MsgA data on the PUSCH corresponding to the PRACH. The network device successfully decodes the MsgA data sent by UE B. But it failed to demodulate UE A's MsgA data. The network device sends the first random access response for UE A and the second random access response for UE B in the same TB, and the subheader of the MAC subPDU of each random access response carries the foregoing fourth indication The information indicates the type of random access response.

In the foregoing embodiment, in 2-step RA, when the demodulation of MsgA data succeeds, the network device sends MsgB to the terminal device. In the case of failure of demodulation of MsgA data, the 2-step RA fails and falls back to 4. -step RA, the network device will send a 4-step RA random access response (first random access response) to the terminal device, so that the terminal device will resend the data part of the MsgA. Therefore, after the terminal device sends the 2-step RA preamble, it may receive the MsgB or 4-step RA random access response (Msg2). The foregoing embodiments solve the problem of distinguishing between 4-step random access response and 2-step random access response, so that the terminal device can distinguish whether the received random access response is 2-step RA MsgB or 4-step RA msg2 .

However, because the content of MsgA data sent by terminal equipment is different, for example, MsgA includes CCCH SDU in initial random access, and MsgA includes C-RNTI MAC CE in random access in the connected state. Therefore, the MsgA data is successfully decoded. In this case, according to the content of the MsgA data, the network device will send a random access response (MsgB) containing different contention resolution information to the terminal device. According to the foregoing embodiment, the terminal device still cannot identify the different MsgB, and therefore cannot perform contention resolution correctly.

In this embodiment, the random access response may also be a third random access response; the random access response indication information may also indicate whether the random access response is a third random access response, and the third random access response The incoming response carries at least the second contention resolution information for the data of the first message.

In this embodiment, the network device may determine the random access response indication information and the random access response based on whether the data of the first message is correctly parsed and the data content of the first message.

For example, after the network device receives the random access preamble (such as the preamble of the MsgA of 2-step RA) sent by the terminal device, it can determine whether the data part of the MsgA can be decoded correctly.

If the data part of the above-mentioned first message cannot be parsed correctly, the network device sends the random access response indication information and the first random access response (similar to msg2 of 4-step RA) to the terminal device, and the random access response indication information is used To instruct the terminal device to receive the first random access response. The first random access response can allow the terminal device to fall back to 4-step RA, and the specific content is as described above.

If the data part of the above first message can be parsed correctly, and the data part of the first message contains a common control channel (CCCH) service data unit (SDU), such as RRCSetupRequest, RRCReestablishmentRequest, RRCSystemInfoRequest, RRCResumeRequest, etc. messages, the network device sends the terminal device Random access response indication information and a second random access response (ie MsgB of 2-step RA), the random access response indication information is used to instruct the terminal device to receive the second random access response. The second random access response is used to allow the terminal device to perform contention resolution, and contains at least contention resolution information (referred to as first contention resolution information), and the contention resolution information at least carries the aforementioned CCCH SDU contained in the data part of the MsgA. In addition, The contention resolution information may also carry TAC, C-RNTI, uplink transmission authorization or downlink data.

On the other hand, if the data part of the above first message can be correctly parsed, and the data part of the first message contains C-RNTI MAC CE, the network device sends the random access response indication information and the third random access response ( That is, MsgB of 2-step RA, the random access response indication information is used to instruct the terminal device to receive the third random access response. The third random access response is used to allow the terminal device to perform contention resolution, and contains at least contention resolution information (called second contention resolution information), and the contention resolution information carries at least the aforementioned C-RNTI contained in the data part of the first message. In addition, the contention resolution information can also carry TAC, uplink transmission authorization or downlink data.

In this embodiment, the network device may also decide whether to send the first random access response or the second or third random access based on the network status or other conditions, not based on whether the data of the first message is correctly parsed. response.

In this embodiment, in order to indicate the first random access response, the second random access response, or the third random access response, the random access response indication information may be at least one of the following: physical layer indication information ; MAC layer indication information; physical layer indication information and MAC layer indication information; and two types of MAC layer indication information. That is, the network device can indicate the type of random access response in 2-step RA through physical layer information or MAC layer information, or through physical layer information and MAC layer information at the same time, or through both MAC layer information. Instructions.

In this embodiment, similar to the foregoing embodiment, the physical layer indication information may include at least one of the following: a wireless network temporary identifier (CRC) used to scramble and schedule the CRC of the physical downlink control channel (PDCCH) for scheduling the random access response ( RNTI); the content of the PDCCH for scheduling the random access response; and the format of the PDCCH for scheduling the random access response. Also, similar to the foregoing embodiment, the MAC layer indication information may include at least one of the following: a medium access control unit (MAC CE) included in the random access response transmission block; a random access control unit (MAC CE) included in the random access response transmission block; The content of the incoming response; and the subheader of the random access response contained in the random access response transmission block.

In an example, the foregoing random access response indication information is the foregoing RNTI, and sending the random access response indication information by the network device to the terminal device may include:

The network device sends the PDCCH for scheduling the random access response to the terminal device, and the CRC of the PDCCH may be scrambled with a third RNTI; the third RNTI indicates that the random access response is the third random access response.

If the data part of MsgA cannot be parsed correctly, the network device can send a first random access response (similar to msg2 of 4-step RA) to the terminal device and use the first RNTI to scramble and schedule the CRC of the PDCCH of the random access response.

If the data part of MsgA can be parsed correctly, and the MsgA data carries CCCH SDU, the network device can send a second random access response (MsgB) to the terminal device and use the second RNTI to scramble and schedule the CRC of the PDCCH of MsgB; if MsgA carries It is CRNTI MAC CE, the network device can send the third random access response (MsgB) to the terminal device and use the third RNTI to scramble the CRC of the PDCCH scheduling MsgB.

In this example, the first RNTI, the second RNTI, and the third RNTI are different from each other, and are related to the PRACH time-frequency resource location and random access response type of the 2-step RA preamble sent by the terminal device, for example, according to the following The formula is calculated:

In the above formula, s_id (0≤s_id<14) is the number of the first OFDM symbol of PRACH in the slot; t_id (0≤t_id<80) is the first PRACH in the system frame Slot number; f_id (0≤f_id<8) is the resource location index of PRACH in the frequency domain; ul_carrier_id (0 or 1) is the identifier of the uplink carrier that sends the preamble, for example, 0 means normal uplink carrier, 1 represents the supplementary uplink carrier; rar_id is the random access response identifier, for example, 0 represents the first random access response, 1 represents the second random access response, and 2 represents the third random access response. The above formula is only an example, and this embodiment does not limit the calculation methods of the first RNTI, the second RNTI, and the third RNTI.

In this example, the third RNTI may also be a C-RNTI. The C-RNTI is consistent with the C-RNTI contained in the data of the first message. The network device uses the PDCCH scrambled by the C-RNTI to indicate the third random access. Into the response. The network device may first use the C-RNTI to identify the third access response, and further use other indication information of the physical layer or MAC layer to distinguish the first random access response from the second random access response, including the use of the physical layer and/or They are distinguished by MAC layer information, so I will not repeat them here.

The network device sends a PDCCH for scheduling the random access response to the terminal device, where the PDCCH includes fifth indication information, and the fifth indication information indicates that the random access response is the third random access response.

This embodiment does not limit the implementation of the fifth indication information.

In another example, the foregoing random access response indication information is in the format of the foregoing PDCCH, and sending the random access response indication information by the network device to the terminal device may include:

The network device sends a PDCCH for scheduling the foregoing random access response to the terminal device, where the PDCCH is in a third format, and the third format is used to indicate that the random access response is the foregoing third random access response.

This embodiment does not limit the implementation of the third format.

In another example, the foregoing random access response indication information is the foregoing RNTI and the foregoing MAC layer indication information, and sending the random access response indication information by the network device to the terminal device may include:

The network device sends the PDCCH used to schedule the random access response to the terminal device. The CRC of the PDCCH is scrambled with the fourth RNTI or the fifth RNTI; the fourth RNTI indicates that the random access response is the first random An access response, where the fifth RNTI indicates that the random access response is not the foregoing first random access response;

In this example, the network device also sends the aforementioned MAC layer indication information to the terminal device. If the random access response is not the aforementioned first random access response, the MAC layer indication information is used to indicate that the random access response is the aforementioned second random access response. Random access response or the aforementioned third random access response.

In this example, first use RNTI to distinguish the first random access response and non-first random access response (second or third random access response), and then use the MAC layer indication information to distinguish the second random access response And the third random access response.

In this example, the method and principle of using RNTI to distinguish the first random access response from the non-first random access response are the same as the aforementioned method of using RNTI to distinguish the first random access response from the second random access response. The principle is the same. The fourth RNTI and the fifth RNTI can be calculated by the following formula:

In the above formula, s_id (0≤s_id<14) is the number of the first OFDM symbol of PRACH in the slot; t_id (0≤t_id<80) is the first PRACH in the system frame Slot number; f_id (0≤f_id<8) is the resource location index of PRACH in the frequency domain; ul_carrier_id (0 or 1) is the identifier of the uplink carrier that sends the preamble, for example, 0 means normal uplink carrier, 1 represents the supplementary uplink carrier; rar_id is the random access response identifier, for example, 0 represents the first random access response, and 1 represents the non-first random access response (second or third random access response). The above formula is only an example, and this embodiment does not limit the calculation methods of the fourth RNTI and the fifth RNTI.

In this example, the method and principle of using the MAC layer indication information to distinguish the second random access response from the third random access response is the same as that of using the MAC layer indication information to distinguish the first random access response from the second random access response. The method and principle of the input response are the same, so the description is omitted here.

In another example, the foregoing random access response indication information is the content of the foregoing PDCCH and the MAC layer indication information, and sending the random access response indication information by the network device to the terminal device may include:

The network device sends a PDCCH for scheduling the random access response to the terminal device, where the content of the PDCCH includes sixth indication information; the sixth indication information indicates whether the random access response is the foregoing first random access response.

In this example, the network device also sends MAC layer indication information to the terminal device. If the random access response is not the first random access response, the MAC layer indication information is used to indicate that the random access response is the second random access response. Random access response or the aforementioned third random access response.

In this example, first use the content of the PDCCH (the sixth indication information) to distinguish the first random access response from the non-first random access response (second or third random access response), and then use the MAC layer indication information To distinguish the second random access response and the third random access response.

In this example, the method and principle of using the content of the PDCCH (the sixth indication information) to distinguish the first random access response from the non-first random access response is different from the aforementioned using the first indication information to distinguish the first random access. The method and principle of the response and the second random access response are the same, and the description is omitted here.

In another example, the aforementioned random access response indication information is the format of the aforementioned PDCCH and the MAC layer indication information, and the network device sending the random access response indication information and the random access response to the terminal device may include:

The network device sends a PDCCH for scheduling the random access response to the terminal device, the PDCCH is in the fourth format or the fifth format, and the fourth format indicates that the random access response is the foregoing first random access response. The five format indicates that the random access response is not the first random access response.

In this example, the network device also sends the aforementioned MAC layer indication information to the terminal device. If the random access response is not the aforementioned first random access response, the MAC layer indication information indicates that the random access response is the aforementioned second random access response. Access response or the aforementioned third random access response.

In this example, the PDCCH format is used to distinguish the first random access response from the non-first random access response (second or third random access response), and then the MAC layer control information is used to distinguish the second random access response. Incoming response and the third random access response.

In this example, the method and principle of using the PDCCH format to distinguish the first random access response from the non-first random access response is the same as using the PDCCH format to distinguish the first random access response from the second random access response. The response method and principle are the same, so the description is omitted here.

The random access response transmission block sent by the network device to the terminal device includes the foregoing MAC CE, which includes seventh indication information, and the seventh indication information indicates that the random access response is the foregoing third random access response.

In this example, the MAC CE of the random access response transmission block realizes the indication of the third random access response, and the MAC CE can also be used to indicate the aforementioned first random access response indication information and the aforementioned second random access response indication information. Random access response indication information.

For example, the random access response indicating MAC CE is identified by the logical channel number (LCID) in the subheader of the MAC subPDU, and the LCID value of the random access response indicating MAC CE is a system preset value, for example, set to a range of 33-46 value.

FIG. 14 is an example of the format of the MAC subPDU subheader of the random access response indication MAC CE. As shown in Figure 14, the MAC CE only contains a 1-byte MAC subPDU subheader, of which 2 bits (E/T) can transmit other control information, for example, to distinguish between the subPDU of the MAC CE and the subPDU of the random access response indication MAC CE. Other types of subPDU; 2 bits are used to indicate the type of random access response, for example, 00 identifies the first random access response, 01 identifies the second random access response, and 11 identifies the third random access response; the remaining bits are reserved Bits ("R" bits).

The content of the random access response sent by the network device to the terminal device includes eighth indication information, which indicates that the random access response is the third random access response.

In this example, the indication of the third random access response is realized through the content of the random access response. In addition, the content of the random access response may also be used to indicate the foregoing first random access response indication information and the foregoing second random access response indication information.

For example, one control bit can be used in the content of the random access response to indicate whether the following is the first random access response or the second or third random access response.

Figure 15 is a schematic diagram of the format of the first random access response. As shown in Figure 15, the first random access response is distinguished from the non-first random access response (second or third random access For example, when C is 0, it indicates that it is the first random access response, and when C is 1, it indicates that it is not the first random access response (second or third random access response).

Figure 16 is a schematic diagram of the format of the second random access response. As shown in Figure 16, the second and third random access responses are distinguished by the control bit "D". For example, when D is 0, it indicates that the random access response is Second random access response. FIG. 16 is only an example of the second random access response, and the content of the second random access response may not include the C-RNTI or TAC shown in FIG. 16.

Figure 17 is a schematic diagram of the format of the third random access response. As shown in Figure 17, the second and third random access responses are distinguished by the control bit "D". For example, when D is 1, it indicates that the random access response is the first 3. Random access response. FIG. 17 is only an example of the third random access response, and the third random access response may not include the TAC shown in FIG. 17.

The subheader of the MAC layer sub-PDU of the random access response sent by the network device to the terminal device includes ninth indication information, which indicates that the random access response is the aforementioned third random access response.

In this example, the content of the third random access response is indicated through the subheader of the random access response MAC subPDU.

In this example, the subheader can occupy 2 bytes, and the above-mentioned ninth indication information occupies two bits. When the value of the ninth indication information is the seventh value, for example, 00, the random access response is The foregoing first random access response; when the value of the ninth indication information is an eighth value, for example, 01, the random access response is the foregoing second random access response; when the value of the ninth indication information is When the ninth value is 11, for example, the random access response is the aforementioned third random access response.

Figure 18 is an example of the subheader of the MAC SubPDU of the random access response. As shown in Figure 18, the subheader consists of 2 bytes. Among them, the control information indicating the type of the random access response (" RARID") occupies 2 bits, and "00" can be used to identify the first random access response, "01" can be used to identify the second random access response, and "10" can be used to identify the third random access response. The remaining position can be used to transmit the Preamble ID and other control information. The preamble ID can occupy 6 bits, as shown in "PAPID" in Figure 18; other control information is used to distinguish between the random access response subPDU and the control information of other types of subPDUs, such as "E"/"T" bits shown in Figure 18. Unused positions can be filled with reserved bits "R".

In another example, the random access response indication information is the subheader of the random access response and the content of the random access response, and sending the random access response indication information by the network device to the terminal device may include:

The subheader of the MAC layer sub-PDU of the random access response sent by the network device to the terminal device includes tenth indication information, which indicates whether the random access response is the first random access response.

In this example, the content of the random access response includes the eleventh indication information. If the random access response is not the first random access response, the eleventh indication information indicates that the random access response is the above The second random access response or the aforementioned third random access response.

In this example, first use the aforementioned random access response subheader to distinguish the first random access response from the non-first random access response (second or third random access response), and then use the content of the random access response To distinguish the second random access response and the third random access response.

In this example, the method and principle of using the subheader of the random access response to distinguish the first random access response from the non-first random access response is the same as that of using the subheader of the random access response to distinguish the first random access response. The methods and principles of the incoming response and the second random access response are the same, and the description is omitted here.

In this example, the method and principle of using the content of the random access response to distinguish the second random access response from the third random access response is different from the aforementioned using the content of the random access response to distinguish the first random access response from The method and principle of the second random access response are the same, and the description is omitted here.

In another example, the foregoing random access response indication information is the content or subheader of the foregoing MAC CE and the foregoing random access response, and sending the random access response indication information by the network device to the terminal device may include:

The random access response transmission block sent by the network device to the terminal device includes the above MAC CE, and the MAC CE includes twelfth indication information, and the twelfth indication information indicates whether the random access response is the first random access response. .

In this example, the content or subheader of the random access response includes thirteenth indication information. If the random access response is not the first random access response, the thirteenth indication information indicates the random access response. Is the second random access response or the third random access response.

In this example, first use the MAC CE to distinguish the first random access response from the non-first random access response (second or third random access response), and then use the content or subheader of the random access response to distinguish The second random access response and the third random access response.

In this example, the method and principle of using the MAC CE to distinguish the first random access response from the non-first random access response is the same as using the MAC CE to distinguish the first random access response from the second random access response. The method and principle are the same, and the description is omitted here.

In this example, the method and principle of using the content or sub-header of the random access response to distinguish the second random access response from the third random access response is different from the foregoing using the content or sub-header of the random access response to distinguish the first random access response. The method and principle of the first random access response and the second random access response are the same, and the description is omitted here.

According to the method of this embodiment, in 2-step RA or 4-step RA, the network device indicates the type of random access response to the terminal device, which is used for the terminal device to distinguish that the received random access response is of 2-step RA MsgB is also Msg2 of 4-step RA, so that the subsequent random access process is executed correctly. In addition, in 2-step RA, the network device indicates the type of the random access response to the terminal device, which is used for the terminal device to distinguish the contention resolution information contained in the received random access response, so as to correctly execute the subsequent random access process.

Example 2

This embodiment provides a method for receiving a random access response, which is applied to a terminal device, and is a processing on the terminal device side corresponding to the method in Embodiment 1, wherein the same content as in Embodiment 1 will not be repeated.

FIG. 19 is a schematic diagram of a method for receiving a random access response in this embodiment. As shown in FIG. 19, the method includes:

Step 1901: Send a first message to a network device, where the first message includes a random access preamble and data, or the first message only includes a random access preamble;

Step 1902: Receive random access response and random access response indication information sent by the network device;

Step 1903: According to the random access response indication information, it is determined that the random access response is the first random access response or the second random access response; the first random access response at least carries the network device The uplink transmission authorization allocated by the terminal device; the second random access response carries at least first contention resolution information for the data of the first message.

In this embodiment, if the first message includes a random access preamble and data, that is, the first message is a 2-step RA MsgA, the uplink transmission authorization carried in the first random access response The data used for the terminal device to retransmit the first message; if the first message only includes the random access preamble, that is, the first message is Msge1 of 4-step RA, the first random access The uplink transmission authorization carried in the incoming response is used by the terminal device to send new data.

In this embodiment, similar to Embodiment 1, the random access response indication information may be physical layer indication information or medium access control (MAC) layer indication information.

The physical layer indication information includes at least one of the following: a radio network temporary identifier (RNTI) used to scramble the CRC of the physical downlink control channel (PDCCH) for scheduling the random access response; and the PDCCH for scheduling the random access response Content; and the format of the PDCCH for scheduling the random access response.

The MAC layer indication information includes at least one of the following: a medium access control unit (MAC CE) included in the random access response transmission block; the content of the random access response included in the random access response transmission block; and random access The subheader of the random access response included in the response transport block.

In one embodiment, the random access response indication information is the RNTI; wherein the terminal device can receive the PDCCH sent by the network device; if the received CRC of the PDCCH is scrambled by the first RNTI, it is determined The random access response is the first random access response; if the received CRC of the PDCCH is scrambled by a second RNTI, it is determined that the random access response is the second random access response.

In this embodiment, the indication of the random access response type is realized through RNTI.

For example, after the terminal device sends the preamble of the MsgA of the 2-step RA, it can judge whether the received random access response is the first random access response or the second random access response according to the reception of the PDCCH.

If the CRC part of the PDCCH received by the terminal device in the random access window is scrambled by the first RNTI, and a MAC subPDU in the TB indicated by the PDCCH contains a preamble identifier that matches the transmitted 2-step RACH preamble , The terminal device determines that the TB contains the first random access response.

If the CRC part of the PDCCH received by the terminal device in the random access window is scrambled by the second RNTI, and a MAC subPDU in the TB indicated by the PDCCH contains a preamble identifier that matches the transmitted 2-step RACH preamble, Then the terminal device determines that the TB contains the second random access response.

The calculation method of the above-mentioned first RNTI and the above-mentioned second RNTI is the same as in Embodiment 1, and the description is omitted here.

For another example, after the terminal device sends the 4-step RA preamble, it can determine whether the first random access response is received according to the reception of the PDCCH. If the CRC part of the PDCCH received by the terminal device in the random access window is scrambled by the first RNTI, and a MAC subPDU in the TB indicated by the PDCCH contains a preamble identifier that matches the 4-step RACH preamble sent , The terminal device determines to receive the first random access response.

In an embodiment, the random access response indication information is the content of the PDCCH; the terminal device may receive the PDCCH sent by the network device, and the PDCCH includes the first indication information; the terminal device may be based on the first indication information. The indication information determines that the random access response is the first random access response or the second random access response.

In this embodiment, the content of the PDCCH indicates the type of random access response.

For example, after the terminal device sends the preamble of the MsgA of the 2-step RA, it can judge whether it received the first or second random access response according to the reception of the PDCCH.

If the content of the PDCCH received by the terminal device in the random access window indicates the first random access response, and a MAC subPDU in the TB indicated by the PDCCH contains a preamble identifier that matches the transmitted 2-step RACH preamble, Then the terminal device determines that the TB contains the first random access response.

If the content of the PDCCH received by the terminal device in the random access window indicates the second random access response, and a MAC subPDU in the TB indicated by the PDCCH contains a preamble identifier that matches the transmitted 2-step RACH preamble, Then the terminal device determines that the TB contains the second random access response.

For another example, after the terminal device sends the 4-step RA preamble, it can determine whether the first random access response is received according to the content of the PDCCH. If the content of the PDCCH received by the terminal device within the random access window indicates the first random access response, and a MAC subPDU in the TB indicated by the PDCCH contains a preamble identifier that matches the 4-step RACH preamble sent, Then the terminal device determines to receive the first random access response.

In one embodiment, the random access response indication information is in the format of the PDCCH; the terminal device can receive the PDCCH sent by the network device; if the received PDCCH is in the first format, determine the random access The incoming response is the first random access response; if the received PDCCH is in the second format, it is determined that the random access response is the second random access response.

In this embodiment, the type of random access response is indicated through the format of the PDCCH.

If the format of the PDCCH received by the terminal device in the random access window indicates the first random access response, and a MAC subPDU in the TB indicated by the PDCCH contains a preamble identifier that matches the transmitted 2-step RACH preamble, Then the terminal device determines that the TB contains the first random access response.

If the format of the PDCCH received by the terminal device in the random access window indicates the second random access response, and one of the MAC subPDUs in the TB indicated by the PDCCH contains the preamble identifier that matches the transmitted 2-step RACH preamble, Then the terminal device determines that the TB contains the second random access response.

For another example, after the terminal device sends the 4-step RA preamble, it can determine whether the first random access response is received according to the format of the PDCCH. If the format of the PDCCH received by the terminal device in the random access window indicates the first random access response, and one of the MAC subPDUs in the TB indicated by the PDCCH contains a preamble identifier that matches the 4-step RACH preamble sent, Then the terminal device determines to receive the first random access response.

In one embodiment, the random access response indication information is the MAC CE; the terminal device may receive a random access response transmission block sent by the network device, and the random access response transmission block includes the MAC CE, the MAC CE includes second indication information; the terminal device may determine according to the second indication information that the random access response is the first random access response or the second random access response.

For example, after the terminal device sends the preamble of the MsgA of the 2-step RA, it can determine whether the received random access response is the first or the second random access response according to the random access response indication MAC CE.

If the terminal device receives the PDCCH scrambled by the RNTI in the random access window, the random access response contained in a MAC subPDU in the TB indicated by the PDCCH indicates that the MAC CE identifies the first random access response, and The next MAC subPDU included in the TB contains a preamble identifier that matches the sent 2-step RACH preamble, and the terminal device determines that it has received the first random access response. The above RNTI is related to the time-frequency resource location of the PRACH of the 2-step RA preamble sent by the terminal device, and can refer to existing standards.

If the terminal device receives the PDCCH scrambled by RNTI in the random access window, the random access response contained in one of the MAC subPDUs in the TB indicated by the PDCCH indicates that the MAC CE identifies the second random access response, and the The next MAC subPDU included in the TB contains a preamble identifier that matches the sent 2-step RACH preamble, and the terminal device determines that the received second random access response is.

For another example, after the terminal device sends the 4-step RA preamble, it can determine whether it received the first or second random access response according to the random access response indication MAC CE. If the terminal device receives the PDCCH scrambled by the RNTI in the random access window, the random access response contained in a MAC subPDU in the TB indicated by the PDCCH indicates that the MAC CE identifies the first random access response, and The next MAC subPDU included in the TB contains a preamble identifier that matches the transmitted 4-step RACH preamble, and the terminal device determines to receive the first random access response.

In one embodiment, the random access response indication information is the content of the random access response; the terminal device may receive the random access response sent by the network device, and the content of the random access response includes the third Indication information; determining whether the random access response is the first random access response or the second random access response according to the third indication information.

For example, after the terminal device sends the preamble of the MsgA of the 2-step RA, it can determine whether it received the first or second random access response according to the control bit (third indication information) in the content of the random access response.

If the terminal device receives the PDCCH scrambled by RNTI in the random access window, one of the MAC subPDUs in the TB indicated by the PDCCH contains the preamble identifier that matches the transmitted 2-step RACH preamble, and the MAC subPDU The control bit of the random access content part indicates the first random access response, and the terminal device determines that the first random access response is received. The above RNTI is related to the time-frequency resource location of the PRACH of the 2-step RA preamble sent by the terminal device, and can refer to existing standards.

If the terminal device receives the PDCCH scrambled by RNTI in the random access window, one of the MAC subPDUs in the TB indicated by the PDCCH contains the preamble identifier that matches the transmitted 2-step RACH preamble, and the MAC subPDU The control bit in the content part of the random access response indicates the second random access response, and the terminal device determines that the second random access response is received.

For another example, after the terminal device sends the 4-step RA preamble, it can determine whether it received the first or second random access response according to the control bit (third indication information) in the content of the random access response. If the terminal device receives the PDCCH scrambled by the RNTI in the random access window, one of the MAC subPDUs in the TB indicated by the PDCCH contains the preamble identifier that matches the 4-step RACH preamble sent, and the MAC subPDU The control bit of the random access content part indicates the first random access response, and the terminal device determines that the first random access response is received.

In one embodiment, the random access response indication information is a subheader of the random access response; the terminal device may receive the random access response sent by the network device, and the MAC layer subheader of the random access response The subheader of the PDU includes fourth indication information; it is determined according to the fourth indication information that the random access response is the first random access response or the second random access response.

For example, after the terminal device sends the preamble of the MsgA of the 2-step RA, it can determine whether it received the first or second random access response according to the control bit (fourth indication information) in the random access response subPDU.

If the terminal device receives the PDCCH scrambled by RNTI in the random access window, one of the MAC subPDUs in the TB indicated by the PDCCH contains the preamble identifier that matches the transmitted 2-step RACH preamble, and the MAC subPDU subheader If the preset control information (fourth indication information) in the data indicates the first random access response, the terminal device determines that the first random access response is received. The above RNTI is related to the time-frequency resource location of the PRACH of the 2-step RA preamble sent by the terminal device, and can refer to existing standards.

If the terminal device receives the PDCCH scrambled by RNTI in the random access window, one of the MAC subPDUs in the TB indicated by the PDCCH contains the preamble identifier that matches the transmitted 2-step RACH preamble, and the MAC subPDU subheader If the preset control information in indicates the second random access response, the terminal device determines that the second random access response is received.

For another example, after the terminal device sends the 4-step RA preamble, it can determine whether it received the first or second random access response according to the control bit (fourth indication information) in the subPDU subheader of the random access response. If the terminal device receives the PDCCH scrambled by RNTI in the random access window, one of the MAC subPDUs in the TB indicated by the PDCCH contains the preamble identifier that matches the transmitted 2-step RACH preamble, and the MAC subPDU subheader If the preset control information (fourth indication information) in the data indicates the first random access response, the terminal device determines to receive the first random access response.

In an embodiment, the above random access response may also be a third random access response; the random access response indication information may also indicate that the random access response is a third random access response, and the third random access response The random access response carries at least second contention resolution information for the data of the first message; the terminal device may determine that the random access response is the third random access according to the random access response indication information response.

In this embodiment, the random access response indication information is at least one of the following: physical layer indication information; MAC layer indication information; physical layer indication information and MAC layer indication information; and two types of MAC layer indication information.

In this embodiment, after the terminal device sends the preamble of the MsgA of 2-step RA or the preamble of 4-step RA, it can determine whether the random access response indication information indicates the first, second or third random access. Into the response.

When the terminal device sends the MsgA of 2-step RA:

If the network device indicates the first random access response, the terminal device resends the MsgA data according to the resources indicated by the uplink transmission authorization included in the first random access response.

If the previously sent MsgA data contains CCCH SDU, and the network device indicates the second random access response, the terminal device can determine whether the contention resolution is successful according to the contention resolution information in the second random access response. If the contention resolution information in the second random access response matches the CCCH SDU included in the MsgA data, the terminal device determines that the contention resolution is successful, otherwise it fails.

If the previously sent MsgA data contains C-RNTI MAC CE, and the network device indicates the third random access response, the terminal device can determine whether the contention resolution is successful according to the contention resolution information in the third random access response. If the contention resolution information in the third random access response matches the C-RNTI MAC CE included in the MsgA data, the terminal device determines that the contention resolution is successful, otherwise it fails.

In the case that the terminal device sends the 4-step RA preamble, if the network device indicates the first random access response, the terminal device sends the data for the first random access response according to the resources indicated by the uplink transmission authorization included in the first random access response. Do data for competitive resolution.

In an example, the random access response indication information is the RNTI; the terminal device can receive the PDCCH sent by the network device; if the CRC of the PDCCH is scrambled with the first RNTI, it is determined that the random access response is The first random access response; if the CRC of the PDCCH is scrambled with a second RNTI, it is determined that the random access response is the second random access response; if the CRC of the PDCCH uses a third RNTI When scrambling, it is determined that the random access response is the third random access response.

For example, after the terminal device sends the preamble of the MsgA of the 2-step RA, it can determine the received random access response according to the reception of the PDCCH.

If the terminal device receives the PDCCH scrambled by the first RNTI in the random access window and one of the MAC subPDUs in the TB indicated by the PDCCH contains a preamble identifier that matches the transmitted 2-step RACH preamble, the terminal device determines What this TB contains is the first random access response.

If the terminal device receives the PDCCH scrambled by the second RNTI and one of the MAC subPDUs in the TB indicated by the PDCCH contains the preamble identifier that matches the transmitted 2-step RACH preamble, the terminal device determines that the TB contains the second Random access response.

If the terminal device receives the PDCCH scrambled by the third RA-RNTI and one of the MAC subPDUs in the TB indicated by the PDCCH contains a preamble identifier that matches the transmitted 2-step RACH preamble, the terminal device determines that the TB contains The third random access response.

In this example, the third RNTI may also be a C-RNTI, which is consistent with the C-RNTI contained in the data of the first message, if the PDCCH received by the terminal device is scrambled by the C-RNTI , It is determined that the third random access response is received. The terminal device may first use the C-RNTI to identify the third access response, and further use other indication information of the physical layer or MAC layer to distinguish the first random access response from the second random access response, including using the physical layer and/or It is distinguished by MAC layer information, and will not be repeated here. If the terminal receives the PDCCH scrambled by the C-RNTI, the terminal determines that the third random access response is received and the contention resolution is successful.

In an example, the random access response indication information is the content of the PDCCH; the terminal device may receive the PDCCH sent by the network device, and the PDCCH includes fifth indication information; if the fifth indication information contained in the PDCCH If the third random access response is indicated, it is determined that the random access response is the third random access response.

In an example, the random access response indication information is the format of the PDCCH; the terminal device can receive the PDCCH sent by the network device; if the format of the PDCCH is the third format, it is determined that the random access response is The third random access response.

In an example, the random access response indication information is the RNTI and the MAC layer indication information; the terminal device may receive the PDCCH and the MAC layer indication information sent by the network device; if the CRC of the PDCCH If the fourth RNTI is used for scrambling, it is determined that the random access response is the first random access response; if the CRC of the PDCCH is scrambled using the fifth RNTI, the random access response is determined according to the MAC layer indication information. The access response is the second random access response or the third random access response.

In an example, the random access response indication information is the content of the PDCCH and the MAC layer indication information; the terminal device may receive the PDCCH and the MAC layer indication information sent by the network device, and the PDCCH The content includes sixth indication information; if the sixth indication information indicates the first random access response, it is determined that the random access response is the first random access response; if the sixth indication information does not indicate the In the first random access response, it is determined according to the MAC layer indication information that the random access response is the second random access response or the third random access response.

In an example, the random access response indication information is the format of the PDCCH and the MAC layer indication information; the terminal device may receive the PDCCH and the MAC layer indication information sent by the network device; if the PDCCH If it is the fourth format, it is determined that the random access response is the first random access response; if the PDCCH is the fifth format, it is determined that the random access response is the The second random access response or the third random access response.

In an example, the random access response indication information is the MAC CE; the terminal device may receive the MAC CE sent by the network device, and the MAC CE includes seventh indication information; if the seventh indication If the information indicates the third random access response, it is determined that the random access response is the third random access response.

In an example, the random access response indication information is the content of the random access response; the terminal device may receive the random access response sent by the network device, and the content of the random access response includes the eighth indication Information; if the eighth indication information indicates a third random access response, it is determined that the random access response is the third random access response.

In an example, the random access response indication information is a subheader of the random access response; the terminal device may receive the random access response sent by the network device, and the MAC layer subPDU of the random access response The subheader of contains ninth indication information; if the ninth indication information indicates the third random access response, it is determined that the random access response is the third random access response.

In an example, the random access response indication information is the subheader of the random access response and the content of the random access response; the terminal device may receive the random access response sent by the network device, and the The subheader of the MAC layer subPDU of the random access response includes tenth indication information, and the content of the random access response includes the eleventh indication information; if the tenth indication information indicates the first random access response, it is determined The random access response is the first random access response; if the tenth indication information does not indicate the first random access response, the random access response is determined according to the eleventh indication information Is the second random access response or the third random access response.

In an example, the random access response indication information is the content or subheader of the MAC CE and the random access response; the terminal device may receive the MAC CE and the random access response, and the MAC The CE includes twelfth indication information, and the content or subheader of the random access response includes thirteenth indication information; if the twelfth indication information indicates the first random access response, determine the random access response Is the first random access response; if the twelfth indication information does not indicate the first random access response, it is determined according to the thirteenth indication information that the random access response is the second random access response An incoming response or the third random access response.

With the method of this embodiment, the network device indicates the type of the random access response by sending the random access response indication information to the terminal device. According to this, the terminal device can correctly perform the subsequent random access process.

Example 3

This embodiment provides a method for sending a random access response, which is applied to a network device, and the same content as in Embodiment 1 will not be repeated. FIG. 20 is a schematic diagram of a method for sending a random access response in this embodiment. Please refer to FIG. 20. The method includes:

Step 2001: Receive a first message sent by a terminal device, where the first message includes a random access preamble and data;

Step 2002: Send random access response indication information and random access response to the terminal device; the random access response indication information indicates that the random access response is a second random access response or a third random access response , The second random access response carries at least first contention resolution information for the data of the first message, and the third random access response carries at least second contention resolution information for the data of the first message .

In this embodiment, as described in Embodiment 1, in 2-step RA, the content of the MsgA data sent by the terminal device may be different. For example, in the initial random access process, the MsgA data may include CCCH SDU. In the random access process in the state, MsgA data may include C-RNTI MAC CE. Therefore, in the case of successful decoding of MsgA data, according to the content of the MsgA data, the network device sends a random access response (MsgB) containing different contention resolution information to the terminal device, and sends random access response indication information to the terminal device, Used for the terminal device to distinguish the contention resolution information contained in the received MsgB, so as to correctly execute the subsequent process.

For example, after the network device receives the 2-step RA MsgA preamble sent by the terminal device, if it correctly parses the data part of the MsgA. If the MsgA data includes CCCH SDU, such as RRCSetupRequest, RRCReestablishmentRequest, RRCSystemInfoRequest, RRCResumeRequest messages, the network device sends the random access response indication information and the second random access response (ie 2-step RA MsgB) to the terminal device, random access response The indication information is used to instruct the terminal device to receive the second random access response. The second random access response is used to allow the terminal device to perform contention resolution, and at least contains contention resolution information (referred to as first contention resolution information), and the first contention resolution information is the CCCH SDU included in the MsgA data.

For another example, after the network device receives the 2-step RA preamble of the MsgA sent by the terminal device, if it correctly parses the data part of the MsgA. If the MsgA data contains C-RNTI MAC CE, the network device sends the random access response indication information and the third random access response (ie MsgB of 2-step RA) to the terminal equipment, and the random access response indication information is used to indicate the terminal equipment Receive the third random access response. The third random access response is used to allow the terminal device to perform contention resolution, and contains at least contention resolution information (referred to as second contention resolution information). The second contention resolution information is the C-RNTI MAC CE included in the MsgA data. The processing on the terminal device side will be described in Embodiment 4.

In this embodiment, the foregoing random access response indication information may be physical layer indication information or medium access control (MAC) layer indication information.

The physical layer indication information may include at least one of the following: a radio network temporary identifier (RNTI) used to scramble the CRC of the physical downlink control channel (PDCCH) for scheduling the random access response; and the PDCCH for scheduling the random access response Content; the format of the PDCCH for scheduling the random access response.

The MAC layer indication information may include at least one of the following: a medium access control unit (MAC CE) included in the random access response transmission block; content of the random access response included in the random access response transmission block; and random access The random access response subheader included in the response transport block.

The network device sends the PDCCH used to schedule the random access response to the terminal device. The CRC of the PDCCH is scrambled with the second RNTI or the third RNTI; the second RNTI indicates that the random access response is the A second random access response, where the third RNTI indicates that the random access response is the third random access response. Therefore, after receiving the PDCCH, the terminal device can determine whether the random access response is the second random access response or the third random access response according to the RNTI that scrambles the CRC of the PDCCH.

For example, after the network device receives the preamble of the MsgA of the 2-step RA sent by the terminal device, it determines whether it can decode the data part of the MsgA correctly. If the data part of MsgA can be parsed correctly, and the MsgA data carries CCCH SDU, the network device sends a second random access response to the terminal device and uses the second RNTI to scramble the CRC of the PDCCH scheduling MsgB; if MsgA carries CRNTI MAC CE, the network device sends the third random access response to the terminal device and uses the third RNTI to scramble the CRC of the PDCCH of the scheduled MsgB. The processing on the terminal device side will be described in Embodiment 4.

In this example, the above-mentioned second RNTI and the above-mentioned third RNTI are different from each other, which can be related to the time-frequency resource location and random access response type of the PRACH of the 2-step RA preamble sent by the terminal device, which can be calculated by the following formula obtain:

In the above formula, s_id (0≤s_id<14) is the number of the first OFDM symbol of PRACH in the slot; t_id (0≤t_id<80) is the first PRACH in the system frame Slot number; f_id (0≤f_id<8) is the resource location index of PRACH in the frequency domain; ul_carrier_id (0 or 1) is the identifier of the uplink carrier that sends the preamble, for example, 0 means normal uplink carrier, 1 represents the supplementary uplink carrier; rar_id is the random access response identifier, for example, 0 represents the second random access response, and 1 represents the third random access response.

In this example, the third RNTI may also be a C-RNTI, which is consistent with the C-RNTI contained in the data of the first message, and the second RNTI may also be an RA-RNTI, which is the same as the terminal The time-frequency resource position correlation of the physical random access channel (PRACH) through which the device sends the preamble can be calculated using a formula proposed in the prior art. The network equipment uses the PDCCH scrambled by the RA-RNTI to indicate the second random access response, and the PDCCH scrambled with the C-RNTI to indicate the third random access response.

Therefore, the RNTI indicates a random access response containing different contention resolution information.

The network device sends a PDCCH for scheduling the random access response to the terminal device, where the PDCCH includes first indication information, and the first indication information indicates that the random access response is the second random access response or the third random access response. Access response. Therefore, after receiving the PDCCH, the terminal device can determine whether the random access response is the second random access response or the third random access response according to the content in the PDCCH.

In this example, the first indication information indicates the above-mentioned second random access response or the above-mentioned third random access response mode, which is the same as the first indication information in Embodiment 1 indicating the above-mentioned first random access response or the above-mentioned second random access response. The access response method is similar, so I won't repeat it here.

Therefore, the content of the PDCCH indicates a random access response containing different contention resolution information.

The network device sends the PDCCH for scheduling the random access response to the terminal device, where the PDCCH is in the second format or the third format, and the second format indicates that the random access response is the second random access response. The format indicates that the random access response is the third random access response. Therefore, after receiving the PDCCH, the terminal device can determine whether the random access response is the second random access response or the third random access response according to the format of the PDCCH.

In this example, the PDCCH format is used to indicate the second random access response and the third random access response, which is the same as the PDCCH format used in Embodiment 1 to indicate the first random access response and the second random access response. The input response method is similar, so I won’t repeat it here.

Thus, the PDCCH format indicates random access responses containing different contention resolution information.

The random access response transmission block sent by the network device to the terminal device includes the MAC CE, and the MAC CE includes second indication information. The second indication information indicates that the random access response is the second random access response or the above The third random access response. Therefore, the terminal device can determine whether the random access response is the second random access response or the third random access response according to the MAC CE.

In this example, the second indication information may occupy one bit. When the value of the second indication information is the first value, for example, 0, the random access response is the second random access response; When the value of the second indication information is the second value, for example, when it is 1, the random access response is the third random access response.

In this example, the aforementioned random access response transmission block may include multiple MAC CEs and random access responses corresponding to each MAC CE, where each MAC CE is immediately followed by its corresponding random access response.

In this example, the second indication information is used to indicate the second random access response and the third random access response, which is the same as the second indication information used in the first embodiment to indicate the first random access response and the second random access response. The access response method is similar, so I won't repeat it here.

Therefore, the MAC CE indicates a random access response containing different contention resolution information.

The content of the random access response sent by the network device to the terminal device includes third indication information indicating that the random access response is the second random access response or the third random access response. Therefore, the terminal device can determine whether the random access response is the second random access response or the third random access response according to the content contained in the random access response.

In this example, the third indication information may occupy one bit. When the value of the third indication information is a third value, for example, 0, the random access response is the second random access response; When the value of the third indication information is a fourth value, for example, when it is 1, the random access response is the third random access response.

In this example, the third indication information is used to indicate the second random access response and the third random access response, which is the same as the third indication information used in Embodiment 1 to indicate the first random access response and the second random access response. The access response method is similar, so I won't repeat it here.

Therefore, the content of the random access response indicates the random access response containing different contention resolution information.

The subheader of the MAC layer sub-PDU of the random access response sent by the network device to the terminal device contains fourth indication information, which indicates that the random access response is the second random access response or the first random access response. 3. Random access response. Therefore, the terminal device can determine whether the random access response is the second random access response or the third random access response according to the subheader of the random access response.

In this example, the aforementioned subheader can occupy 2 bytes, and the aforementioned fourth indication information can occupy one bit. When the value given to the fourth indication information is the fifth value, for example, 0, the aforementioned random access response is The second random access response; when the value of the fourth indication information is a sixth value, such as 1, the random access response is the third random access response.

In this example, the fourth indication information is used to indicate the second random access response and the third random access response, which is the same as the fourth indication information used in the first embodiment to indicate the first random access response and the second random access response. The access response method is similar, so I won't repeat it here.

Therefore, the random access response containing different contention resolution information is indicated through the subheader of the random access response.

With the method of this embodiment, the network device indicates the random access response containing different contention resolution information by sending random access response indication information to the terminal device. According to this, the terminal device can correctly perform contention resolution, and then correctly perform subsequent Random access process.

Example 4

This embodiment provides a method for receiving a random access response, which is applied to a terminal device, which is a processing on the terminal device side corresponding to the method in Embodiment 3, and the same content as in Embodiment 3 will not be repeated.

FIG. 21 is a schematic diagram of a method for receiving a random access response in this embodiment. As shown in FIG. 21, the method includes:

Step 2101: Send a first message to a network device, where the first message includes a random access preamble and data;

Step 2102: Receive random access response and random access response indication information sent by the network device;

Step 2103: Determine, according to the random access response indication information, that the random access response is a second random access response or a third random access response; the second random access response carries at least information specific to the first message The first contention resolution information for the data of the first message, and the third random access response carries at least the second contention resolution information for the data of the first message.

In this embodiment, as described in Embodiment 3, in 2-step RA, the content of the MsgA data sent by the terminal device may be different at different stages. After the network device decodes the MsgA data correctly, it is based on the content of the MsgA data. , Send to the terminal equipment a random access response (MsgB) containing different contention resolution information and random access response indication information for indicating the random access response, the terminal equipment can distinguish the received random access response The contention resolution information, so as to correctly execute the follow-up.

For example, after the terminal device sends the preamble of the MsgA of 2-step RA, it determines whether the random access response indication information indicates the second random access response or the third random access response. If the previously sent MsgA data contains CCCH SDU, and the network device indicates the second random access response, the terminal device determines whether the contention resolution is successful according to the contention resolution information in the second random access response; if the second random access The contention resolution information in the response matches the CCCH SDU included in the MsgA data, and the terminal device determines that the contention resolution is successful, otherwise it fails. If the previously sent MsgA data contains C-RNTI MAC CE, and the network device indicates the third random access response, the terminal device determines whether the contention resolution is successful according to the contention resolution information in the third random access response; if the third The contention resolution information in the random access response matches the C-RNTI MAC CE included in the MsgA data, and the terminal device determines that the contention resolution is successful, otherwise it fails.

The physical layer indication information may include at least one of the following: a radio network temporary identifier (RNTI) used to scramble the CRC of the physical downlink control channel (PDCCH) for scheduling the random access response; and the PDCCH for scheduling the random access response And the format of the PDCCH for scheduling the random access response.

In an example, the foregoing random access response indication information is the foregoing RNTI; the terminal device may receive the PDCCH sent by the network device; if the received CRC of the PDCCH is scrambled by the second RNTI, the terminal device determines the The random access response is the foregoing second random access response; if the received CRC of the PDCCH is scrambled by a third RNTI, the terminal device determines that the random access response is the foregoing third random access response.

For example, after the terminal device sends the preamble of the MsgA of the 2-step RA, it judges the type of random access response received according to the reception of the PDCCH. If the terminal device receives the PDCCH scrambled by the second RNTI and one of the MAC subPDUs in the TB indicated by the PDCCH contains the preamble identifier that matches the transmitted 2-step RACH preamble, the terminal device determines that the TB contains the second Random access response. If the terminal device receives the PDCCH scrambled by the third RNTI and one of the MAC subPDUs in the TB indicated by the PDCCH contains the preamble identifier that matches the transmitted 2-step RACH preamble, the terminal device determines that the TB contains the third Random access response.

In this example, the above-mentioned second RNTI and the above-mentioned third RNTI are different from each other, and are related to the PRACH time-frequency resource position and random access response type of the 2-step RA preamble sent by the terminal device, which can be calculated by the following formula :

In this example, the third RNTI may also be a C-RNTI, which is consistent with the C-RNTI contained in the data of the first message, and the second RNTI may also be an RA-RNTI, which is the same as the terminal The time-frequency resource position correlation of the physical random access channel (PRACH) through which the device sends the preamble can be calculated using a formula proposed in the prior art. If the terminal device receives the PDCCH scrambled by the RA-RNTI and one of the MAC subPDUs in the TB indicated by the PDCCH contains a preamble identifier that matches the transmitted 2-step RACH preamble, the terminal device determines to receive the second random Access response: If the terminal receives the PDCCH scrambled by the C-RNTI, the terminal determines that the third random access response is received and the contention resolution is successful.

In another example, the foregoing random access response indication information is the content of the foregoing PDCCH; the terminal device may receive the PDCCH sent by the network device, and the PDCCH includes the first indication information; the terminal device may determine the foregoing random access according to the first indication information. The incoming response is the aforementioned second random access response or the aforementioned third random access response.

In another example, the foregoing random access response indication information is the format of the foregoing PDCCH; the terminal device may receive the PDCCH sent by the network device; if the received PDCCH is in the second format, it is determined that the foregoing random access response is the foregoing second format. Random access response; if the received PDCCH is in the third format, determine that the random access response is the third random access response.

In another example, the foregoing random access response indication information is the foregoing MAC CE; the terminal device may receive the random access response transmission block sent by the network device, and the random access response transmission block includes the foregoing MAC CE, and the MAC CE includes Second indication information; the terminal device may determine according to the second indication information that the random access response is the second random access response or the third random access response.

In another example, the foregoing random access response indication information is the content of the foregoing random access response; the terminal device may receive a random access response sent by the network device, and the content of the random access response includes the third indication information; the terminal device It may be determined according to the third indication information that the random access response is the second random access response or the third random access response.

In another example, the foregoing random access response indication information is the subheader of the foregoing random access response; the terminal device may receive the random access response sent by the network device, and the subheader of the MAC layer subPDU of the random access response includes Fourth indication information; the terminal device may determine according to the fourth indication information that the random access response is the second random access response or the third random access response.

Example 5

This embodiment provides a random access response sending device, which is configured in a network device. Since the principle of the device to solve the problem is similar to the method of embodiment 1, its specific implementation can refer to the method of embodiment 1, and the same contents will not be repeated.

FIG. 22 is a schematic diagram of a random access response sending apparatus 2200 of this embodiment. As shown in FIG. 22, the apparatus includes: a receiving unit 2201 and a sending unit 2202.

The receiving unit 2201 is configured to receive a first message sent by a terminal device, where the first message includes a random access preamble and data, or the first message only includes a random access preamble; the sending unit 2202 is configured to send The terminal device sends random access response indication information and a random access response; the random access response indication information indicates that the random access response is a first random access response or a second random access response, and the first The random access response carries at least the uplink transmission authorization allocated by the network device to the terminal device; the second random access response carries at least the first contention resolution information for the data of the first message.

In this embodiment, if the first message contains a random access preamble and data, the random access response indication information indicates that the random access response is the first random access response or the second random access response. A random access response, where the uplink transmission authorization carried in the first random access response is used for the terminal device to retransmit the data of the first message.

In this embodiment, if the first message only contains a random access preamble, the random access response indication information indicates that the random access response is the first random access response, and the first random access response The uplink transmission authorization carried in the access response is used by the terminal device to send new data.

In this embodiment, the random access response indication information is physical layer indication information or medium access control (MAC) layer indication information.

In this embodiment, the physical layer indication information includes at least one of the following: a radio network temporary identifier (RNTI) used to scramble the CRC of the physical downlink control channel (PDCCH) used to schedule the random access response; The content of the PDCCH of the random access response; the format of the PDCCH of the random access response.

In an embodiment, the random access response indication information is the RNTI, and the sending unit 2202 sends the random access response indication information to the terminal device, including:

The sending unit 2202 sends a PDCCH used to schedule the random access response to the terminal equipment, and the CRC of the PDCCH is scrambled with the first RNTI or the second RNTI; the first RNTI indicates the The random access response is the first random access response, and the second RNTI indicates that the random access response is the second random access response, so that the terminal device scrambles the CRC of the PDCCH according to the The RNTI determines that the random access response is the first random access response or the second random access response.

In one embodiment, the random access response indication information is the content of the PDCCH, and the sending unit 2202 sends the random access response indication information to the terminal device, including:

The sending unit 2202 sends a PDCCH for scheduling the random access response to the terminal device, where the PDCCH includes first indication information, and the first indication information indicates that the random access response is the first Random access response or the second random access response, so that the terminal device determines that the random access response is the first random access response or the second random access according to the content in the PDCCH response.

In one embodiment, the random access response indication information is in the format of the PDCCH, and the sending unit 2202 sends the random access response indication information to the terminal device, including:

The sending unit 2202 sends a PDCCH for scheduling the random access response to the terminal device, where the PDCCH is in the first format or the second format, and the first format indicates that the random access response is the A first random access response, and the second format indicates that the random access response is the second random access response, so that the terminal device determines that the random access response is based on the PDCCH format The first random access response or the second random access response.

In this embodiment, the MAC layer indication information includes at least one of the following: medium access control unit (MAC CE) included in the random access response transmission block; random access included in the random access response transmission block The content of the response; and the subheader of the random access response contained in the random access response transmission block.

In an embodiment, the random access response indication information is the MAC CE, and the sending unit 2202 sends the random access response indication information to the terminal device, including:

The random access response transmission block sent by the sending unit 2202 to the terminal device includes the MAC CE, the MAC CE includes second indication information, and the second indication information indicates that the random access response is The first random access response or the second random access response, so that the terminal device determines that the random access response is the first random access response or the second random access response according to the MAC CE Random access response.

In this embodiment, the second indication information occupies one bit, and when the value of the second indication information is the first value, the random access response is the first random access response; When the value of the second indication information is the second value, the random access response is the second random access response.

In this embodiment, the random access response transmission block includes multiple MAC CEs and random access responses corresponding to each MAC CE, where each MAC CE is immediately followed by the corresponding random access response .

In an embodiment, the random access response indication information is the content of the random access response, and the sending unit 2202 sending the random access response indication information to the terminal device includes:

The content of the random access response sent by the sending unit 2202 to the terminal device includes third indication information, and the third indication information indicates that the random access response is the first random access response or The second random access response, so that the terminal device determines that the random access response is the first random access response or the second random access response according to content included in the random access response.

In this embodiment, the third indication information occupies one bit, and when the value of the third indication information is the third value, the random access response is the first random access response; When the value of the third indication information is the fourth value, the random access response is the second random access response.

In one embodiment, the random access response indication information is a subheader of the random access response, and the sending unit 2202 sends the random access response indication information to the terminal device, including:

The subheader of the MAC layer subPDU of the random access response sent by the sending unit 2202 to the terminal device includes fourth indication information, and the fourth indication information indicates that the random access response is the first A random access response or the second random access response, so that the terminal device determines, according to the subheader of the random access response, that the random access response is the first random access response or The second random access response.

In this embodiment, the subheader occupies 2 bytes, the fourth indication information occupies one bit, and when the value of the fourth indication information is the fifth value, the random access response is the A first random access response; when the value of the fourth indication information is a sixth value, the random access response is the second random access response.

In an embodiment, the random access response is the first random access response, the second random access response, or the third random access response; the random access response indication information also indicates the Whether the random access response is the third random access response, and the third random access response carries at least second contention resolution information for the data of the first message.

The sending unit 2202 sends the PDCCH for scheduling the random access response to the terminal equipment, and the CRC of the PDCCH is scrambled with a third RNTI; the third RNTI indicates that the random access response is the The third random access response.

The sending unit 2202 sends a PDCCH for scheduling the random access response to the terminal device, where the PDCCH includes fifth indication information, and the fifth indication information indicates that the random access response is the third Random access response.

The sending unit 2202 sends a PDCCH for scheduling the random access response to the terminal device, where the PDCCH is a third format, and the third format is used to indicate that the random access response is the third Random access response.

In an embodiment, the random access response indication information is the RNTI and the MAC layer indication information, and the sending unit 2202 sends the random access response indication information to the terminal device, including:

The sending unit 2202 sends the PDCCH used to schedule the random access response to the terminal equipment, and the CRC of the PDCCH is scrambled with the fourth RNTI or the fifth RNTI; the fourth RNTI indicates the The random access response is the first random access response, and the fifth RNTI indicates that the random access response is not the first random access response;

If the random access response is not the first random access response, the sending unit 2202 sends the MAC layer indication information to the terminal device, where the MAC layer indication information is used to indicate the random access The response is the second random access response or the third random access response.

In an embodiment, the random access response indication information is the content of the PDCCH and the MAC layer indication information, and the sending unit 2202 sends the random access response indication information to the terminal device, including:

The sending unit 2202 sends a PDCCH for scheduling the random access response to the terminal device, where the content of the PDCCH includes sixth indication information; the sixth indication information indicates whether the random access response is The first random access response;

In an embodiment, the random access response indication information is the format of the PDCCH and the MAC layer indication information, and the sending unit 2202 sends random access response indication information and random access response to the terminal device ,include:

The sending unit 2202 sends a PDCCH for scheduling the random access response to the terminal device, where the PDCCH is in the fourth format or the fifth format, and the fourth format indicates that the random access response is the A first random access response, where the fifth format indicates that the random access response is not the first random access response;

If the random access response is not the first random access response, the sending unit 2202 sends the MAC layer indication information to the terminal device, where the MAC layer indication information indicates that the random access response is The second random access response or the third random access response.

The random access response transmission block sent by the sending unit 2202 to the terminal device includes the MAC CE, the MAC CE includes seventh indication information, and the seventh indication information indicates that the random access response is The third random access response.

The content of the random access response sent by the sending unit 2202 to the terminal device includes eighth indication information, and the eighth indication information indicates that the random access response is a third random access response.

The subheader of the MAC layer subPDU of the random access response sent by the sending unit 2202 to the terminal device includes ninth indication information, and the ninth indication information indicates that the random access response is the first 3. Random access response.

In this embodiment, the subheader occupies 2 bytes, the ninth indication information occupies two bits, and when the value of the ninth indication information is the seventh value, the random access response is The first random access response; when the value of the ninth indication information is the eighth value, the random access response is the second random access response; when the value of the ninth indication information is the first When the value is nine, the random access response is the third random access response.

In an embodiment, the random access response indication information is a subheader of the random access response and the content of the random access response, and the sending unit 2202 sends a random access response indication to the terminal device Information, including:

The subheader of the MAC layer subPDU of the random access response sent by the sending unit 2202 to the terminal device includes tenth indication information, and the tenth indication information indicates whether the random access response is the first A random access response;

If the random access response is not the first random access response, the content of the random access response includes eleventh indication information, and the eleventh indication information indicates that the random access response is the The second random access response or the third random access response.

In one embodiment, the random access response indication information is the MAC CE and the content or subheader of the random access response, and the sending unit 2202 sends the random access response indication information to the terminal device, include:

The random access response transmission block sent by the sending unit 2202 to the terminal device includes the MAC CE, the MAC CE includes twelfth indication information, and the twelfth indication information indicates the random access response Whether the first random access response;

If the random access response is not the first random access response, the content or subheader of the random access response includes thirteenth indication information, and the thirteenth indication information indicates the random access response Is the second random access response or the third random access response.

With the apparatus of this embodiment, the network device indicates the type of the random access response by sending the random access response indication information to the terminal device. According to this, the terminal device can correctly execute the subsequent random access process.

Example 6

This embodiment provides a random access response receiving apparatus, which is configured in a terminal device. Since the principle of the device to solve the problem is similar to the method of the second embodiment, the specific implementation can refer to the method of the second embodiment, and the same contents will not be repeated.

FIG. 23 is a schematic diagram of an apparatus 2300 for receiving a random access response in this embodiment. As shown in FIG. 23, the apparatus includes: a sending unit 2301, a receiving unit 2302, and a determining unit 2303.

The sending unit 2301 is configured to send a first message to a network device, where the first message includes a random access preamble and data, or the first message only includes a random access preamble; the receiving unit 2302 is configured to receive the network Random access response and random access response indication information sent by the device; the determining unit 2303 is configured to determine whether the random access response is the first random access response or the second random access response according to the random access response indication information The first random access response carries at least the uplink transmission authorization allocated by the network device to the terminal device; the second random access response carries at least the first contention resolution information for the data of the first message .

In this embodiment, if the first message includes a random access preamble and data, the uplink transmission authorization carried in the first random access response is used by the terminal device to retransmit the first message. data.

In this embodiment, if the first message only includes a random access preamble, the uplink transmission authorization carried in the first random access response is used for the terminal device to send new data.

In one embodiment, the random access response indication information is the RNTI; the receiving unit 2302 receives the PDCCH sent by the network device; if the received CRC of the PDCCH is scrambled by the first RNTI, The determining unit 2303 determines that the random access response is the first random access response; if the received CRC of the PDCCH is scrambled by the second RNTI, the determining unit 2303 determines the random access The response is the second random access response.

In an embodiment, the random access response indication information is the content of the PDCCH; the receiving unit 2302 receives the PDCCH sent by the network device, and the PDCCH includes the first indication information; the determining unit 2303 is based on The first indication information determines that the random access response is the first random access response or the second random access response.

In an embodiment, the random access response indication information is the format of the PDCCH; the receiving unit 2302 receives the PDCCH sent by the network device; if the received PDCCH is in the first format, the The determining unit 2303 determines that the random access response is the first random access response; if the received PDCCH is in the second format, the determining unit 2303 determines that the random access response is the second Random access response.

In one embodiment, the random access response indication information is the MAC CE; the receiving unit 2302 receives a random access response transmission block sent by the network device, and the random access response transmission block includes all The MAC CE, the MAC CE includes second indication information; the determining unit 2303 determines according to the second indication information that the random access response is the first random access response or the second random access response.

In one embodiment, the random access response indication information is the content of the random access response; the receiving unit 2302 receives the random access response sent by the network device, and the content of the random access response includes Third indication information; the determining unit 2303 determines whether the random access response is the first random access response or the second random access response according to the third indication information.

In one embodiment, the random access response indication information is a subheader of the random access response; the receiving unit 2302 receives the random access response sent by the network device, and the MAC of the random access response The subheader of the layer subPDU includes fourth indication information; the determining unit 2303 determines according to the fourth indication information that the random access response is the first random access response or the second random access response.

In an embodiment, the random access response is the first random access response, the second random access response, or the third random access response; the random access response indication information also indicates the The random access response is the third random access response, and the third random access response carries at least second contention resolution information for the data of the first message; the terminal device is based on the random access response The indication information determines that the random access response is the third random access response.

In one embodiment, the random access response indication information is the RNTI; the receiving unit 2302 receives the PDCCH sent by the network device; if the CRC of the PDCCH is scrambled using the first RNTI, the determining unit 2303 Determine that the random access response is the first random access response; if the CRC of the PDCCH is scrambled with a second RNTI, the determining unit 2303 determines that the random access response is the second random access response If the CRC of the PDCCH is scrambled with a third RNTI, the determining unit 2303 determines that the random access response is the third random access response.

In one embodiment, the random access response indication information is the content of the PDCCH; the receiving unit 2302 receives the PDCCH sent by the network device, and the PDCCH includes the fifth indication information; if the PDCCH contains the first If the five indication information indicates the third random access response, the determining unit 2303 determines that the random access response is the third random access response.

In one embodiment, the random access response indication information is the format of the PDCCH; the receiving unit 2302 receives the PDCCH sent by the network device; if the format of the PDCCH is the third format, the determining unit 2303 It is determined that the random access response is the third random access response.

In one embodiment, the random access response indication information is the RNTI and the MAC layer indication information; the receiving unit 2302 receives the PDCCH and the MAC layer indication information sent by the network device; if the If the CRC of the PDCCH is scrambled using the fourth RNTI, the determining unit 2303 determines that the random access response is the first random access response; if the CRC of the PDCCH is scrambled using the fifth RNTI, the determining unit 2303 The unit 2303 determines that the random access response is the second random access response or the third random access response according to the MAC layer indication information.

In one embodiment, the random access response indication information is the content of the PDCCH and the MAC layer indication information; the receiving unit 2302 receives the PDCCH and the MAC layer indication information sent by the network device, so The content of the PDCCH includes sixth indication information; if the sixth indication information indicates a first random access response, the determining unit 2303 determines that the random access response is the first random access response; if the If the sixth indication information does not indicate the first random access response, the determining unit 2303 determines that the random access response is the second random access response or the third random access response according to the MAC layer indication information. Random access response.

In one embodiment, the random access response indication information is the format of the PDCCH and the MAC layer indication information; the receiving unit 2302 receives the PDCCH and the MAC layer indication information sent by the network device; if If the PDCCH is in the fourth format, the determining unit 2303 determines that the random access response is the first random access response; if the PDCCH is in the fifth format, the determining unit 2303 determines according to the MAC The layer indication information determines that the random access response is the second random access response or the third random access response.

In one embodiment, the random access response indication information is the MAC CE; the receiving unit 2302 receives the MAC CE sent by the network device, and the MAC CE includes seventh indication information; if the If the seventh indication information indicates the third random access response, the determining unit 2303 determines that the random access response is the third random access response.

In one embodiment, the random access response indication information is the content of the random access response; the receiving unit 2302 receives the random access response sent by the network device, and the content of the random access response includes Eighth indication information; if the eighth indication information indicates a third random access response, the determining unit 2304 determines that the random access response is the third random access response.

In one embodiment, the random access response indication information is a subheader of the random access response; the receiving unit 2302 receives the random access response sent by the network device, and the MAC of the random access response The subheader of the layer sub-PDU contains ninth indication information; if the ninth indication information indicates the third random access response, the determining unit 2303 determines that the random access response is the third random access response. response.

In one embodiment, the random access response indication information is the subheader of the random access response and the content of the random access response; the receiving unit 2302 receives the random access response sent by the network device , The subheader of the MAC layer subPDU of the random access response includes tenth indication information, and the content of the random access response includes the eleventh indication information; if the tenth indication information indicates the first random access response , The determining unit 2303 determines that the random access response is the first random access response; if the tenth indication information does not indicate the first random access response, the determining unit 2303 determines The eleventh indication information determines that the random access response is the second random access response or the third random access response.

In one embodiment, the random access response indication information is the content or subheader of the MAC CE and the random access response; the receiving unit 2302 receives the MAC CE and the random access response, The MAC CE includes twelfth indication information, and the content or subheader of the random access response includes thirteenth indication information; if the twelfth indication information indicates the first random access response, the determining unit 2303 determines that the random access response is the first random access response; if the twelfth indication information does not indicate the first random access response, the determining unit 2303 determines according to the thirteenth indication information The random access response is the second random access response or the third random access response.

Example 7

This embodiment provides a random access response sending device, which is configured in a network device. Since the principle of the device to solve the problem is similar to the method of embodiment 3, the specific implementation can refer to the method of embodiment 3, and the same contents will not be repeated.

FIG. 24 is a schematic diagram of an apparatus 2400 for sending a random access response in this embodiment. As shown in FIG. 24, the apparatus includes a receiving unit 2401 and a sending unit 2402.

The receiving unit 2401 is configured to receive a first message sent by a terminal device, where the first message includes a random access preamble and data; the sending unit 2402 is configured to send random access response indication information and a random access response to the terminal device ; The random access response indication information indicates that the random access response is a second random access response or a third random access response, and the second random access response carries at least data for the first message First contention resolution information, and the third random access response carries at least second contention resolution information for the data of the first message.

The physical layer indication information includes at least one of the following: a radio network temporary identifier (RNTI) used to scramble the CRC of the physical downlink control channel (PDCCH) for scheduling the random access response; and the PDCCH for scheduling the random access response Content; the format of the PDCCH for scheduling the random access response.

In an embodiment, the random access response indication information is the RNTI, and the sending unit 2402 sends the random access response indication information to the terminal device, including:

The sending unit 2402 sends a PDCCH for scheduling the random access response to the terminal equipment, and the CRC of the PDCCH is scrambled with a second RNTI or a third RNTI; the second RNTI indicates the The random access response is the second random access response, and the third RNTI indicates that the random access response is the third random access response, so that the terminal device scrambles the CRC of the PDCCH according to the The RNTI determines that the random access response is the second random access response or the third random access response.

In one embodiment, the random access response indication information is the content of the PDCCH, and the sending unit 2402 sends the random access response indication information to the terminal device, including:

The sending unit 2402 sends a PDCCH for scheduling the random access response to the terminal device, where the PDCCH includes first indication information, and the first indication information indicates that the random access response is the second Random access response or the third random access response, so that the terminal device determines that the random access response is the second random access response or the third random access according to the content in the PDCCH response.

In an embodiment, the random access response indication information is in the format of the PDCCH, and the sending unit 2402 sends the random access response indication information to the terminal device, including:

The sending unit 2402 sends a PDCCH for scheduling the random access response to the terminal device, the PDCCH is in the second format or the third format, and the second format indicates that the random access response is the A second random access response, where the third format indicates that the random access response is the third random access response, so that the terminal device determines that the random access response is based on the format of the PDCCH The second random access response or the third random access response.

In an embodiment, the random access response indication information is the MAC CE, and the sending unit 2402 sends the random access response indication information to the terminal device, including:

The random access response transmission block sent by the sending unit 2402 to the terminal device includes the MAC CE, the MAC CE includes second indication information, and the second indication information indicates that the random access response is The second random access response or the third random access response, so that the terminal device determines that the random access response is the second random access response or the third random access response according to the MAC CE Random access response.

In this embodiment, the second indication information occupies one bit, and when the value of the second indication information is the first value, the random access response is the second random access response; When the value of the second indication information is the second value, the random access response is the third random access response.

In one embodiment, the random access response indication information is the content of the random access response, and the sending unit 2402 sends the random access response indication information to the terminal device, including:

The content of the random access response sent by the sending unit 2402 to the terminal device includes third indication information, and the third indication information indicates that the random access response is the second random access response or The third random access response, so that the terminal device determines that the random access response is the second random access response or the third random access response according to content included in the random access response.

In this embodiment, the third indication information occupies one bit, and when the value of the third indication information is the third value, the random access response is the second random access response; when the When the value of the third indication information is the fourth value, the random access response is the third random access response.

In one embodiment, the random access response indication information is a subheader of the random access response, and the sending unit 2402 sends the random access response indication information to the terminal device, including:

The subheader of the MAC layer subPDU of the random access response sent by the sending unit 2402 to the terminal device includes fourth indication information, and the fourth indication information indicates that the random access response is the first 2. Random access response or the third random access response, so that the terminal device determines, according to the subheader of the random access response, that the random access response is the second random access response or The third random access response.

In this embodiment, the subheader occupies 2 bytes, the fourth indication information occupies one bit, and when the value of the fourth indication information is the fifth value, the random access response is the A second random access response; when the value of the fourth indication information is a sixth value, the random access response is the third random access response.

Through the apparatus of this embodiment, the network device indicates the random access response containing different contention resolution information by sending random access response indication information to the terminal device. According to this, the terminal device can correctly perform contention resolution and then correctly perform subsequent Random access process.

Example 8

This embodiment provides a random access response receiving apparatus, which is configured in a terminal device. Since the principle of the device to solve the problem is similar to the method of embodiment 4, the specific implementation can refer to the method of embodiment 4, and the same contents will not be repeated.

FIG. 25 is a schematic diagram of an apparatus 2500 for receiving a random access response in this embodiment. As shown in FIG. 25, the apparatus includes: a sending unit 2501, a receiving unit 2502, and a determining unit 2503.

The sending unit 2501 is configured to send a first message to a network device, where the first message includes a random access preamble and data; the receiving unit 2502 is configured to receive random access response and random access response indication information sent by the network device The determining unit 2503 is configured to determine, according to the random access response indication information, that the random access response is a second random access response or a third random access response; the second random access response carries at least the The first contention resolution information of the data of the first message, and the third random access response carries at least the second contention resolution information of the data of the first message.

In one embodiment, the random access response indication information is the RNTI; the receiving unit 2502 receives the PDCCH sent by the network device; if the CRC of the received PDCCH is scrambled by the second RNTI, The determining unit 2503 determines that the random access response is the second random access response; if the received CRC of the PDCCH is scrambled by a third RNTI, the determining unit 2503 determines the random access The response is the third random access response.

In an embodiment, the random access response indication information is the content of the PDCCH; the receiving unit 2502 receives the PDCCH sent by the network device, and the PDCCH includes the first indication information; the determining unit 2503 is based on The first indication information determines that the random access response is the second random access response or the third random access response.

In one embodiment, the random access response indication information is the format of the PDCCH; the receiving unit 2502 receives the PDCCH sent by the network device; if the received PDCCH is in the second format, the The determining unit 2503 determines that the random access response is the second random access response; if the received PDCCH is in the third format, the determining unit 2503 determines that the random access response is the third Random access response.

In one embodiment, the random access response indication information is the MAC CE; the receiving unit 2502 receives a random access response transmission block sent by the network device, and the random access response transmission block includes all The MAC CE, the MAC CE includes second indication information; the determining unit 2503 determines according to the second indication information that the random access response is the second random access response or the third random access response.

In one embodiment, the random access response indication information is the content of the random access response; the receiving unit 2502 receives the random access response sent by the network device, and the content of the random access response includes Third indication information; the determining unit 2503 determines according to the third indication information that the random access response is the second random access response or the third random access response.

In one embodiment, the random access response indication information is a subheader of the random access response; the receiving unit 2502 receives the random access response sent by the network device, and the MAC of the random access response The subheader of the layer sub-PDU includes fourth indication information; the determining unit 2503 determines according to the fourth indication information that the random access response is the second random access response or the third random access response.

Example 9

The embodiment of the present invention also provides a network device, and the network device includes the device described in

Embodiment

5 or 7.

FIG. 26 is a schematic diagram of an implementation manner of a network device according to an embodiment of the present invention. As shown in FIG. 26, the network device 2600 may include: a central processing unit (CPU) 2601 and a memory 2602; the memory 2602 is coupled to the central processing unit 2601. The memory 2602 can store various data; in addition, it also stores information processing programs, which are executed under the control of the central processing unit 2601 to receive various information sent by the terminal device and send various information to the terminal device.

In one embodiment, the function of the device described in

embodiment

5 or 7 can be integrated into the central processing unit 2601, and the central processing unit 2601 realizes the function of the device described in

embodiment

5 or 7, which is related to embodiment 5. Or the functions of the device described in 7 are incorporated here, and will not be repeated here.

In another embodiment, the device described in

embodiment

5 or 7 can be configured separately from the central processing unit 2601. For example, the device described in

embodiment

5 or 7 can be a chip connected to the central processing unit 2601 through the central The processor 2601 is controlled to realize the function of the device described in

Embodiment

5 or 7.

In addition, as shown in FIG. 26, the network device 2600 may further include: a transceiver 2603, an antenna 2604, etc.; wherein the functions of the above-mentioned components are similar to those of the prior art, and will not be repeated here. It is worth noting that the network device 2600 does not necessarily include all the components shown in FIG. 26; in addition, the network device 2600 may also include components not shown in FIG. 26, and reference may be made to the prior art.

Through the network device of this embodiment, the terminal device can correctly execute the subsequent random access process.

Example 10

This embodiment provides a terminal device, which includes the device described in Embodiment 6 or 8.

FIG. 27 is a schematic diagram of a terminal device according to an embodiment of the present invention. As shown in FIG. 27, the terminal device 2700 may include a central processing unit 2701 and a memory 2702; the memory 2702 is coupled to the central processing unit 2701. It is worth noting that this figure is exemplary; other types of structures can also be used to supplement or replace this structure to implement telecommunication functions or other functions.

In one embodiment, the function of the device described in embodiment 6 or 8 can be integrated into the central processing unit 2701, and the central processing unit 2701 can realize the function of the device described in embodiment 6 or 8, which is related to embodiment 4. The functions of the described device are incorporated here, and will not be repeated here.

In another embodiment, the device described in embodiment 6 or 8 can be configured separately from the central processing unit 2701. For example, the device described in embodiment 6 or 8 can be configured as a chip connected to the central processing unit 2701. The control of the central processing unit 2701 realizes the functions of the device described in Embodiment 6 or 8.

As shown in FIG. 27, the terminal device 2700 may further include: a communication module 2703, an input unit 2704, an audio processing unit 2705, a display 2706, and a power supply 2707. It is worth noting that the terminal device 2700 does not necessarily include all the components shown in FIG. 27; in addition, the terminal device 2700 may also include components not shown in FIG. 27, and reference may be made to the prior art.

As shown in FIG. 27, the central processing unit 2701 is sometimes called a controller or operating control, and may include a microprocessor or other processor devices and/or logic devices. The central processing unit 2701 receives input and controls each of the terminal equipment 2700. Operation of components.

Wherein, the memory 2702 may be, for example, one or more of a cache, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable devices. Can store various information, in addition can also store and execute programs related to the information. And the central processing unit 2701 can execute the program stored in the memory 2702 to realize information storage or processing. The functions of other components are similar to the existing ones, so I won't repeat them here. Each component of the terminal device 2700 can be implemented by dedicated hardware, firmware, software, or a combination thereof, without departing from the scope of the present invention.

With the terminal device of this embodiment, the terminal device can correctly execute the subsequent random access procedure.

Example 11

An embodiment of the present invention also provides a communication system, which includes a network device and a terminal device. The network device is, for example, the network device 2600 described in Embodiment 9, and the terminal device is, for example, the terminal device 2700 described in Embodiment 10.

In this embodiment, the terminal device is, for example, a UE served by gNB. In addition to the functions of the device described in Embodiment 6 or 8, it also includes the conventional composition and functions of the terminal device. As described in Embodiment 10, This will not be repeated here.

In this embodiment, the network device may be, for example, the gNB in NR, which in addition to the functions of the device described in

Embodiment

5 or 7, also includes the regular composition and functions of the network device, as described in Embodiment 9. I will not repeat them here.

Through the communication system of this embodiment, the terminal device can correctly execute the subsequent random access process.

The embodiment of the present invention also provides a computer-readable program, wherein when the program is executed in the network device, the program causes the computer to execute the method described in

embodiment

1 or 3 in the network device.

An embodiment of the present invention also provides a storage medium storing a computer-readable program, wherein the computer-readable program enables a computer to execute the method described in

Embodiment

1 or 3 in a network device.

The embodiment of the present invention also provides a computer-readable program, wherein when the program is executed in the terminal device, the program causes the computer to execute the method described in

embodiment

2 or 4 in the terminal device.

embodiment

2 or 4 in a terminal device.

The above devices and methods of the present invention can be implemented by hardware, or by hardware combined with software. The present invention relates to such a computer-readable program, when the program is executed by a logic component, the logic component can realize the above-mentioned device or constituent component, or the logic component can realize the above-mentioned various methods Or steps. Logic components such as field programmable logic components, microprocessors, processors used in computers, etc. The present invention also relates to storage media for storing the above programs, such as hard disks, magnetic disks, optical disks, DVDs, flash memory, and the like.

The method/device described in conjunction with the embodiments of the present invention may be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams and/or one or more combinations of the functional block diagrams shown in the figure may correspond to each software module of the computer program flow or each hardware module. These software modules can respectively correspond to the steps shown in the figure. These hardware modules can be implemented by curing these software modules by using a field programmable gate array (FPGA), for example.

The software module can be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM or any other form of storage medium known in the art. A storage medium may be coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be a component of the processor. The processor and the storage medium may be located in the ASIC. The software module can be stored in the memory of the mobile terminal, or can be stored in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a larger-capacity MEGA-SIM card or a large-capacity flash memory device, the software module can be stored in the MEGA-SIM card or a large-capacity flash memory device.

One or more of the functional blocks and/or one or more combinations of the functional blocks described in the drawings can be implemented as general-purpose processors, digital signal processors (DSPs) for performing the functions described in the present invention. ), Application Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component or any appropriate combination thereof. One or more of the functional blocks described in the drawings and/or one or more combinations of the functional blocks can also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, or multiple micro-processing Processor, one or more microprocessors in communication with the DSP, or any other such configuration.

The present invention has been described above in conjunction with specific embodiments, but it should be clear to those skilled in the art that these descriptions are all exemplary and do not limit the protection scope of the present invention. Those skilled in the art can make various variations and modifications to the present invention based on the spirit and principle of the present invention, and these variations and modifications are also within the scope of the present invention.

Regarding the above-mentioned implementations disclosed in this embodiment, the following supplementary notes are also disclosed:

1. A random access response sending device, which is configured in a network device, wherein the device includes:

2. The device according to Supplement 1, wherein:

If the first message includes a random access preamble and data, the random access response indication information indicates that the random access response is the first random access response or the second random access response, so The uplink transmission authorization carried in the first random access response is used for the terminal device to retransmit the data of the first message;

If the first message only contains a random access preamble, the random access response indication information indicates that the random access response is the first random access response, and all the information carried in the first random access response is The uplink transmission authorization is used for the terminal device to send new data.

3. The device according to

appendix

1 or 2, wherein the random access response indication information is physical layer indication information or medium access control (MAC) layer indication information.

4. The device according to appendix 3, wherein the physical layer indication information includes at least one of the following:

A radio network temporary identifier (RNTI) used to scramble the CRC of the physical downlink control channel (PDCCH) for scheduling the random access response;

Scheduling the content of the PDCCH of the random access response;

The format of the PDCCH for scheduling the random access response.

5. The apparatus according to appendix 4, wherein the random access response indication information is the RNTI, and the sending unit sending the random access response indication information to the terminal device includes:

The sending unit sends a PDCCH used to schedule the random access response to the terminal equipment, and the CRC of the PDCCH is scrambled with a first RNTI or a second RNTI; the first RNTI indicates the random The access response is the first random access response, and the second RNTI indicates that the random access response is the second random access response, so that the terminal device scrambles the CRC of the PDCCH according to the RNTI It is determined that the random access response is the first random access response or the second random access response.

6. The apparatus according to appendix 4, wherein the random access response indication information is content of the PDCCH, and the sending unit sending the random access response indication information to the terminal device includes:

The sending unit sends a PDCCH for scheduling the random access response to the terminal device, where the PDCCH includes first indication information, and the first indication information indicates that the random access response is the first random access response. The access response or the second random access response enables the terminal device to determine that the random access response is the first random access response or the second random access response according to the content in the PDCCH .

7. The apparatus according to appendix 4, wherein the random access response indication information is in the format of the PDCCH, and the sending unit sending the random access response indication information to the terminal device includes:

The sending unit sends a PDCCH used to schedule the random access response to the terminal device, where the PDCCH is in the first format or the second format, and the first format indicates that the random access response is the second format. A random access response, the second format indicates that the random access response is the second random access response, so that the terminal device determines that the random access response is the second random access response according to the format of the PDCCH The first random access response or the second random access response.

8. The device according to appendix 3, wherein the MAC layer indication information includes at least one of the following:

9. The apparatus according to appendix 8, wherein the random access response indication information is the MAC CE, and the sending unit sending random access response indication information to the terminal device includes:

The random access response transmission block sent by the sending unit to the terminal device includes the MAC CE, the MAC CE includes second indication information, and the second indication information indicates that the random access response is The first random access response or the second random access response, so that the terminal device determines that the random access response is the first random access response or the second random access response according to the MAC CE Access response.

10. The device according to appendix 9, wherein the second indication information occupies one bit, and when the value of the second indication information is the first value, the random access response is the first random Access response; when the value of the second indication information is the second value, the random access response is the second random access response.

11. The device according to appendix 9, wherein the random access response transmission block includes multiple MAC CEs and random access responses corresponding to each MAC CE, wherein each MAC CE is immediately followed by the random access response. The corresponding random access response.

12. The apparatus according to appendix 8, wherein the random access response indication information is content of the random access response, and the sending unit sending the random access response indication information to the terminal device includes:

The content of the random access response sent by the sending unit to the terminal device includes third indication information, and the third indication information indicates that the random access response is the first random access response or the A second random access response, so that the terminal device determines that the random access response is the first random access response or the second random access response according to content included in the random access response.

13. The apparatus according to appendix 12, wherein the third indication information occupies one bit, and when the value of the third indication information is a third value, the random access response is the first random Access response; when the value of the third indication information is a fourth value, the random access response is the second random access response.

14. The apparatus according to appendix 8, wherein the random access response indication information is a subheader of the random access response, and the sending unit sends the random access response indication information to the terminal device, including :

The subheader of the MAC layer subPDU of the random access response sent by the sending unit to the terminal device includes fourth indication information, and the fourth indication information indicates that the random access response is the first Random access response or the second random access response, so that the terminal device determines that the random access response is the first random access response or the second random access response according to the subheader of the random access response The second random access response.

15. The device according to appendix 14, wherein the subheader occupies 2 bytes, the fourth indication information occupies one bit, and when the value of the fourth indication information is the fifth value, the The random access response is the first random access response; when the value of the fourth indication information is a sixth value, the random access response is the second random access response.

16. The apparatus according to

appendix

1 or 2, wherein the random access response is the first random access response, the second random access response, or the third random access response; the random The access response indication information also indicates whether the random access response is the third random access response, and the third random access response carries at least second contention resolution information for the data of the first message.

17. The apparatus according to Supplement 16, wherein the random access response indication information is at least one of the following:

Physical layer indication information;

MAC layer indication information;

Physical layer indication information and MAC layer indication information; and

Two kinds of MAC layer indication information.

18. The apparatus according to Supplement 17, wherein the physical layer indication information includes at least one of the following:

The content of the PDCCH for scheduling the random access response; and

The format of the PDCCH for scheduling the random access response.

19. The device according to Supplement 17, wherein the MAC layer indication information includes at least one of the following:

20. The apparatus according to appendix 18, wherein the random access response indication information is the RNTI, and the sending unit sending the random access response indication information to the terminal device includes:

The sending unit sends a PDCCH for scheduling the random access response to the terminal equipment, and the CRC of the PDCCH is scrambled with a third RNTI; the third RNTI indicates that the random access response is the first 3. Random access response.

21. The apparatus according to Supplement 18, wherein the random access response indication information is content of the PDCCH, and the sending unit sending random access response indication information to the terminal device includes:

The sending unit sends a PDCCH for scheduling the random access response to the terminal device, where the PDCCH includes fifth indication information, and the fifth indication information indicates that the random access response is the third random access response. Access response.

22. The apparatus according to Supplement 18, wherein the random access response indication information is in the format of the PDCCH, and the sending unit sending the random access response indication information to the terminal device includes:

The sending unit sends a PDCCH for scheduling the random access response to the terminal device, where the PDCCH is in a third format, and the third format is used to indicate that the random access response is the third random access response. Access response.

23. The apparatus according to appendix 18, wherein the random access response indication information is the RNTI and the MAC layer indication information, and the sending unit sends random access response indication information to the terminal device, include:

The sending unit sends a PDCCH for scheduling the random access response to the terminal device, and the CRC of the PDCCH is scrambled with a fourth RNTI or a fifth RNTI; the fourth RNTI indicates the random The access response is the first random access response, and the fifth RNTI indicates that the random access response is not the first random access response;

If the random access response is not the first random access response, the sending unit sends the MAC layer indication information to the terminal device, where the MAC layer indication information is used to indicate the random access response Is the second random access response or the third random access response.

24. The apparatus according to Supplement 18, wherein the random access response indication information is content of the PDCCH and the MAC layer indication information, and the sending unit sends a random access response indication to the terminal device Information, including:

The sending unit sends a PDCCH for scheduling the random access response to the terminal device, where the content of the PDCCH includes sixth indication information; the sixth indication information indicates whether the random access response is the The first random access response;

25. The apparatus according to Supplement 18, wherein the random access response indication information is a format of the PDCCH and the MAC layer indication information, and the sending unit sends a random access response indication to the terminal device Information and random access response, including:

The sending unit sends a PDCCH for scheduling the random access response to the terminal device, where the PDCCH is a fourth format or a fifth format, and the fourth format indicates that the random access response is the first A random access response, where the fifth format indicates that the random access response is not the first random access response;

If the random access response is not the first random access response, the sending unit sends the MAC layer indication information to the terminal device, and the MAC layer indication information indicates that the random access response is The second random access response or the third random access response.

26. The apparatus according to appendix 19, wherein the random access response indication information is the MAC CE, and the sending unit sending random access response indication information to the terminal device includes:

The random access response transmission block sent by the sending unit to the terminal device includes the MAC CE, the MAC CE includes seventh indication information, and the seventh indication information indicates that the random access response is the The third random access response.

27. The apparatus according to appendix 19, wherein the random access response indication information is content of the random access response, and the sending unit sending the random access response indication information to the terminal device includes:

The content of the random access response sent by the sending unit to the terminal device includes eighth indication information, where the eighth indication information indicates that the random access response is a third random access response.

28. The apparatus according to Supplement 19, wherein the random access response indication information is a subheader of the random access response, and the sending unit sends random access response indication information to the terminal device, including :

The subheader of the MAC layer subPDU of the random access response sent by the sending unit to the terminal device contains ninth indication information, and the ninth indication information indicates that the random access response is the third Random access response.

29. The device according to appendix 28, wherein the subheader occupies 2 bytes, the ninth indication information occupies two bits, and when the value of the ninth indication information is the seventh value, the The random access response is the first random access response; when the value of the ninth indication information is the eighth value, the random access response is the second random access response; when the first When the value of the nine indication information is the ninth value, the random access response is the third random access response.

30. The apparatus according to Supplement 19, wherein the random access response indication information is a subheader of the random access response and the content of the random access response, and the sending unit sends a message to the terminal device Send random access response indication information, including:

The subheader of the MAC layer subPDU of the random access response sent by the sending unit to the terminal device includes tenth indication information, and the tenth indication information indicates whether the random access response is the first Random access response;

31. The apparatus according to appendix 19, wherein the random access response indication information is the MAC CE and the content or subheader of the random access response, and the sending unit sends a random access response to the terminal device. Access response indication information, including:

The random access response transmission block sent by the sending unit to the terminal device includes the MAC CE, the MAC CE includes twelfth indication information, and the twelfth indication information indicates whether the random access response is The first random access response;

32. A random access response receiving device, configured in a terminal device, wherein the device includes:

A determining unit, which determines, according to the random access response indication information, that the random access response is a first random access response or a second random access response; the first random access response carries at least the network device: The uplink transmission authorization allocated by the terminal device; the second random access response carries at least first contention resolution information for the data of the first message.

33. The device according to Supplement 32, wherein:

If the first message includes a random access preamble and data, the uplink transmission authorization carried in the first random access response is used for the terminal device to retransmit the data of the first message;

If the first message only includes a random access preamble, the uplink transmission authorization carried in the first random access response is used for the terminal device to send new data.

34. The apparatus according to appendix 32 or 33, wherein the random access response indication information is physical layer indication information or medium access control (MAC) layer indication information.

35. The apparatus according to Supplement 34, wherein the physical layer indication information includes at least one of the following:

The content of the PDCCH for scheduling the random access response; and

The format of the PDCCH for scheduling the random access response.

36. The device according to Supplement 34, wherein the MAC layer indication information includes at least one of the following:

37. The apparatus according to Supplement 35, wherein the random access response indication information is the RNTI;

The receiving unit receives the PDCCH sent by the network device;

If the received CRC of the PDCCH is scrambled by the first RNTI, the determining unit determines that the random access response is the first random access response;

If the received CRC of the PDCCH is scrambled by the second RNTI, the determining unit determines that the random access response is the second random access response.

38. The apparatus according to Supplement 35, wherein the random access response indication information is content of the PDCCH;

The receiving unit receives a PDCCH sent by the network device, where the PDCCH includes first indication information;

The determining unit determines whether the random access response is the first random access response or the second random access response according to the first indication information.

39. The apparatus according to Supplement 35, wherein the random access response indication information is a format of the PDCCH;

The receiving unit receives the PDCCH sent by the network device;

If the received PDCCH is in the first format, the determining unit determines that the random access response is the first random access response;

If the received PDCCH is in the second format, the determining unit determines that the random access response is the second random access response.

40. The apparatus according to Supplement 36, wherein the random access response indication information is the MAC CE;

The receiving unit receives a random access response transmission block sent by the network device, where the random access response transmission block includes the MAC CE, and the MAC CE includes second indication information;

The determining unit determines whether the random access response is the first random access response or the second random access response according to the second indication information.

41. The apparatus according to Supplement 36, wherein the random access response indication information is content of the random access response;

The receiving unit receives a random access response sent by the network device, and the content of the random access response includes third indication information;

The determining unit determines whether the random access response is the first random access response or the second random access response according to the third indication information.

42. The apparatus according to Supplement 36, wherein the random access response indication information is a subheader of the random access response;

The receiving unit receives a random access response sent by the network device, and the subheader of the MAC layer subPDU of the random access response includes fourth indication information;

The determining unit determines whether the random access response is the first random access response or the second random access response according to the fourth indication information.

43. The apparatus according to appendix 32 or 33, wherein the random access response is the first random access response, the second random access response, or the third random access response; The access response indication information also indicates that the random access response is the third random access response, and the third random access response carries at least second contention resolution information for the data of the first message; The terminal device determines that the random access response is the third random access response according to the random access response indication information.

44. The apparatus according to Supplement 43, wherein the random access response indication information is at least one of the following:

Physical layer indication information;

MAC layer indication information;

Physical layer indication information and MAC layer indication information; and

Two kinds of MAC layer indication information.

45. The apparatus according to Supplement 44, wherein the physical layer indication information includes at least one of the following:

The content of the PDCCH for scheduling the random access response; and

The format of the PDCCH for scheduling the random access response.

46. The device according to Supplement 44, wherein the MAC layer indication information includes at least one of the following:

47. The apparatus according to Supplement 45, wherein the random access response indication information is the RNTI;

The receiving unit receives the PDCCH sent by the network device;

If the CRC of the PDCCH is scrambled using the first RNTI, the determining unit determines that the random access response is the first random access response;

If the CRC of the PDCCH is scrambled with a second RNTI, the determining unit determines that the random access response is the second random access response;

If the CRC of the PDCCH is scrambled with a third RNTI, the determining unit determines that the random access response is the third random access response.

48. The apparatus according to appendix 45, wherein the random access response indication information is content of the PDCCH;

The receiving unit receives a PDCCH sent by a network device, where the PDCCH includes fifth indication information;

If the fifth indication information included in the PDCCH indicates a third random access response, the determining unit determines that the random access response is a third random access response.

49. The apparatus according to Supplement 45, wherein the random access response indication information is a format of the PDCCH;

The receiving unit receives the PDCCH sent by the network device;

If the format of the PDCCH is the third format, the determining unit determines that the random access response is the third random access response.

50. The apparatus according to Supplement 45, wherein the random access response indication information is the RNTI and the MAC layer indication information;

The receiving unit receives the PDCCH and the MAC layer indication information sent by the network device;

If the CRC of the PDCCH is scrambled using a fourth RNTI, the determining unit determines that the random access response is the first random access response;

If the CRC of the PDCCH is scrambled using the fifth RNTI, the determining unit determines that the random access response is the second random access response or the third random access response according to the MAC layer indication information .

51. The apparatus according to Supplement 45, wherein the random access response indication information is content of the PDCCH and the MAC layer indication information;

The receiving unit receives the PDCCH and the MAC layer indication information sent by the network device, and the content of the PDCCH includes sixth indication information;

If the sixth indication information indicates a first random access response, the determining unit determines that the random access response is the first random access response;

If the sixth indication information does not indicate the first random access response, the determining unit determines that the random access response is the second random access response or the first random access response according to the MAC layer indication information 3. Random access response.

52. The apparatus according to Supplement 45, wherein the random access response indication information is a format of the PDCCH and the MAC layer indication information;

If the PDCCH is in the fourth format, the determining unit determines that the random access response is the first random access response;

If the PDCCH is in the fifth format, the determining unit determines whether the random access response is the second random access response or the third random access response according to the MAC layer indication information.

53. The apparatus according to appendix 46, wherein the random access response indication information is the MAC CE;

The receiving unit receives the MAC CE sent by the network device, where the MAC CE includes seventh indication information;

If the seventh indication information indicates the third random access response, the determining unit determines that the random access response is the third random access response.

54. The device according to appendix 46, wherein the random access response indication information is content of the random access response;

The receiving unit receives a random access response sent by the network device, and the content of the random access response includes eighth indication information;

If the eighth indication information indicates a third random access response, the determining unit determines that the random access response is the third random access response.

55. The apparatus according to Supplement 46, wherein the random access response indication information is a subheader of the random access response;

The receiving unit receives a random access response sent by the network device, and the subheader of the MAC layer subPDU of the random access response includes ninth indication information;

If the ninth indication information indicates the third random access response, the determining unit determines that the random access response is the third random access response.

56. The apparatus according to Supplement 46, wherein the random access response indication information is a subheader of the random access response and content of the random access response;

The receiving unit receives the random access response sent by the network device, the subheader of the MAC layer subPDU of the random access response includes tenth indication information, and the content of the random access response includes eleventh indication information ；

If the tenth indication information indicates a first random access response, the determining unit determines that the random access response is the first random access response;

If the tenth indication information does not indicate the first random access response, the determining unit determines, according to the eleventh indication information, that the random access response is the second random access response or the The third random access response.

57. The apparatus according to appendix 46, wherein the random access response indication information is the MAC CE and content or subheaders of the random access response;

The receiving unit receives the MAC CE and the random access response, where the MAC CE includes twelfth indication information, and the content or subheader of the random access response includes thirteenth indication information;

If the twelfth indication information indicates a first random access response, the determining unit determines that the random access response is the first random access response;

If the twelfth indication information does not indicate the first random access response, the determining unit determines whether the random access response is the second random access response or the first random access response according to the thirteenth indication information. The third random access response.

1B. A random access response sending device, configured in a network device, wherein the device includes:

2B. The apparatus according to appendix 1B, wherein the random access response indication information is physical layer indication information or medium access control (MAC) layer indication information.

3B. The device according to Supplement 2B, wherein the physical layer indication information includes at least one of the following:

Scheduling the content of the PDCCH of the random access response;

The format of the PDCCH for scheduling the random access response.

4B. The apparatus according to appendix 3B, wherein the random access response indication information is the RNTI, and the sending unit sending the random access response indication information to the terminal device includes:

The sending unit sends a PDCCH used to schedule the random access response to the terminal device, and the CRC of the PDCCH is scrambled with a second RNTI or a third RNTI; the second RNTI indicates the random The access response is the second random access response, and the third RNTI indicates that the random access response is the third random access response, so that the terminal device scrambles the CRC of the PDCCH according to the RNTI It is determined that the random access response is the second random access response or the third random access response.

5B. The apparatus according to Supplement 3B, wherein the random access response indication information is content of the PDCCH, and the sending unit sending random access response indication information to the terminal device includes:

The sending unit sends a PDCCH for scheduling the random access response to the terminal device, where the PDCCH includes first indication information, and the first indication information indicates that the random access response is the second random access response. Access response or the third random access response, so that the terminal device determines that the random access response is the second random access response or the third random access response according to the content in the PDCCH .

6B. The apparatus according to appendix 3B, wherein the random access response indication information is in the format of the PDCCH, and the sending unit sending the random access response indication information to the terminal device includes:

The sending unit sends a PDCCH for scheduling the random access response to the terminal device, where the PDCCH is in the second format or the third format, and the second format indicates that the random access response is the first 2. Random access response, the third format indicates that the random access response is the third random access response, so that the terminal device determines that the random access response is the third random access response according to the format of the PDCCH The second random access response or the third random access response.

7B. The device according to Supplement 2B, wherein the MAC layer indication information includes at least one of the following:

8B. The apparatus according to appendix 7B, wherein the random access response indication information is the MAC CE, and the sending unit sending random access response indication information to the terminal device includes:

The random access response transmission block sent by the sending unit to the terminal device includes the MAC CE, the MAC CE includes second indication information, and the second indication information indicates that the random access response is The second random access response or the third random access response, so that the terminal device determines that the random access response is the second random access response or the third random access response according to the MAC CE Access response.

9B. The apparatus according to Supplement 8B, wherein the second indication information occupies one bit, and when the value of the second indication information is the first value, the random access response is the second random Access response; when the value of the second indication information is the second value, the random access response is the third random access response.

10B. The apparatus according to appendix 8B, wherein the random access response transmission block includes multiple MAC CEs and random access responses corresponding to each MAC CE, wherein each MAC CE is immediately followed by the random access response. The corresponding random access response.

11B. The apparatus according to appendix 7B, wherein the random access response indication information is content of the random access response, and the sending unit sending the random access response indication information to the terminal device includes:

The content of the random access response sent by the sending unit to the terminal device includes third indication information, and the third indication information indicates that the random access response is the second random access response or the A third random access response, so that the terminal device determines that the random access response is the second random access response or the third random access response according to content included in the random access response.

12B. The apparatus according to Supplement 11B, wherein the third indication information occupies one bit, and when the value of the third indication information is a third value, the random access response is the second random Access response; when the value of the third indication information is a fourth value, the random access response is the third random access response.

13B. The apparatus according to Supplement 7B, wherein the random access response indication information is a subheader of the random access response, and the sending unit sends the random access response indication information to the terminal device, including :

The subheader of the MAC layer subPDU of the random access response sent by the sending unit to the terminal device includes fourth indication information, and the fourth indication information indicates that the random access response is the second Random access response or the third random access response, so that the terminal device determines that the random access response is the second random access response or the second random access response according to the subheader of the random access response The third random access response.

14B. The device according to appendix 13B, wherein the subheader occupies 2 bytes, the fourth indication information occupies one bit, and when the value of the fourth indication information is the fifth value, the The random access response is the second random access response; when the value of the fourth indication information is the sixth value, the random access response is the third random access response.

1C. A random access response receiving device, configured in a terminal device, wherein the device includes:

2C. The apparatus according to appendix 1C, wherein the random access response indication information is physical layer indication information or medium access control (MAC) layer indication information.

3C. The device according to Supplement 2C, wherein the physical layer indication information includes at least one of the following:

The content of the PDCCH for scheduling the random access response; and

The format of the PDCCH for scheduling the random access response.

4C. The device according to Supplement 2C, wherein the MAC layer indication information includes at least one of the following:

5C. The apparatus according to Supplement 3C, wherein the random access response indication information is the RNTI;

The receiving unit receives the PDCCH sent by the network device;

If the received CRC of the PDCCH is scrambled by the second RNTI, the determining unit determines that the random access response is the second random access response;

If the received CRC of the PDCCH is scrambled by a third RNTI, the determining unit determines that the random access response is the third random access response.

6C. The apparatus according to Supplement 3C, wherein the random access response indication information is content of the PDCCH;

The determining unit determines whether the random access response is the second random access response or the third random access response according to the first indication information.

7C. The apparatus according to Supplement 3C, wherein the random access response indication information is a format of the PDCCH;

The receiving unit receives the PDCCH sent by the network device;

If the received PDCCH is in the second format, the determining unit determines that the random access response is the second random access response;

If the received PDCCH is in the third format, the determining unit determines that the random access response is the third random access response.

8C. The apparatus according to appendix 4C, wherein the random access response indication information is the MAC CE;

The determining unit determines whether the random access response is the second random access response or the third random access response according to the second indication information.

9C. The device according to Supplement 4C, wherein the random access response indication information is content of the random access response;

The determining unit determines whether the random access response is the second random access response or the third random access response according to the third indication information.

10C. The apparatus according to appendix 4C, wherein the random access response indication information is a subheader of the random access response;

The determining unit determines whether the random access response is the second random access response or the third random access response according to the fourth indication information.

Claims

A device for sending a random access response is configured in a network device, wherein the device includes:

A receiving unit, which receives a first message sent by a terminal device, where the first message includes a random access preamble and data, or the first message only includes a random access preamble;

A sending unit, which sends random access response indication information and a random access response to the terminal device; the random access response indication information indicates that the random access response is the first random access response or the second random access In response, the first random access response carries at least the uplink transmission authorization allocated by the network device to the terminal device; the second random access response carries at least the first contention resolution for the data of the first message information.
The device of claim 1, wherein:

If the first message includes a random access preamble and data, the random access response indication information indicates that the random access response is the first random access response or the second random access response, so The uplink transmission authorization carried in the first random access response is used for the terminal device to retransmit the data of the first message;

If the first message only contains a random access preamble, the random access response indication information indicates that the random access response is the first random access response, and all the information carried in the first random access response is The uplink transmission authorization is used for the terminal device to send new data.
The apparatus according to claim 1, wherein the random access response indication information is physical layer indication information or medium access control (MAC) layer indication information.
The device according to claim 3, wherein the physical layer indication information includes at least one of the following:

A radio network temporary identifier (RNTI) used to scramble the CRC of the physical downlink control channel (PDCCH) for scheduling the random access response;

Scheduling the content of the PDCCH of the random access response;

The format of the PDCCH for scheduling the random access response.
The apparatus according to claim 4, wherein the random access response indication information is the RNTI, and the sending unit sending the random access response indication information to the terminal device comprises:

The sending unit sends a PDCCH used to schedule the random access response to the terminal equipment, and the CRC of the PDCCH is scrambled with a first RNTI or a second RNTI; the first RNTI indicates the random The access response is the first random access response, and the second RNTI indicates that the random access response is the second random access response, so that the terminal device scrambles the CRC of the PDCCH according to the RNTI It is determined that the random access response is the first random access response or the second random access response.
The device according to claim 3, wherein the MAC layer indication information includes at least one of the following:

The Medium Access Control Control Unit (MAC CE) included in the random access response transmission block;

The content of the random access response contained in the random access response transmission block; and

The random access response subheader included in the random access response transmission block.
The apparatus according to claim 1, wherein the random access response is the first random access response, the second random access response, or the third random access response; the random access response indicates The information also indicates whether the random access response is the third random access response, and the third random access response carries at least second contention resolution information for the data of the first message.
7. The apparatus according to claim 7, wherein the random access response indication information is at least one of the following:

Physical layer indication information;

MAC layer indication information;

Physical layer indication information and MAC layer indication information; and

Two kinds of MAC layer indication information.
The apparatus according to claim 8, wherein the physical layer indication information includes at least one of the following:

A radio network temporary identifier (RNTI) used to scramble the CRC of the physical downlink control channel (PDCCH) for scheduling the random access response;

The content of the PDCCH for scheduling the random access response; and

The format of the PDCCH for scheduling the random access response.
The device according to claim 8, wherein the MAC layer indication information includes at least one of the following:

The Medium Access Control Control Unit (MAC CE) included in the random access response transmission block;

The content of the random access response contained in the random access response transmission block; and

The random access response subheader included in the random access response transmission block.
A random access response receiving device is configured in terminal equipment, wherein the device includes:

A sending unit, which sends a first message to the network device, where the first message includes a random access preamble and data, or the first message only includes a random access preamble;

A receiving unit, which receives random access response and random access response indication information sent by the network device;

A determining unit, which determines, according to the random access response indication information, that the random access response is a first random access response or a second random access response; the first random access response carries at least the network device: The uplink transmission authorization allocated by the terminal device; the second random access response carries at least first contention resolution information for the data of the first message.
The device according to claim 11, wherein:

If the first message includes a random access preamble and data, the uplink transmission authorization carried in the first random access response is used for the terminal device to retransmit the data of the first message;

If the first message only includes a random access preamble, the uplink transmission authorization carried in the first random access response is used for the terminal device to send new data.
The apparatus according to claim 11, wherein the random access response indication information is physical layer indication information or medium access control (MAC) layer indication information.
The apparatus according to claim 13, wherein the physical layer indication information includes at least one of the following:

A radio network temporary identifier (RNTI) used to scramble the CRC of the physical downlink control channel (PDCCH) for scheduling the random access response;

The content of the PDCCH for scheduling the random access response; and

The format of the PDCCH for scheduling the random access response.
The apparatus according to claim 13, wherein the MAC layer indication information includes at least one of the following:

The Medium Access Control Control Unit (MAC CE) included in the random access response transmission block;

The content of the random access response contained in the random access response transmission block; and

The random access response subheader included in the random access response transmission block.
The apparatus according to claim 14, wherein the random access response indication information is the RNTI;

The receiving unit receives the PDCCH sent by the network device;

If the received CRC of the PDCCH is scrambled by the first RNTI, the determining unit determines that the random access response is the first random access response;

If the received CRC of the PDCCH is scrambled by the second RNTI, the determining unit determines that the random access response is the second random access response.
The apparatus according to claim 11, wherein the random access response is the first random access response, the second random access response, or the third random access response; the random access response indicates The information also indicates that the random access response is the third random access response, and the third random access response carries at least second contention resolution information for the data of the first message; the terminal device The random access response indication information determines that the random access response is the third random access response.
The apparatus according to claim 17, wherein the random access response indication information is at least one of the following:

Physical layer indication information;

MAC layer indication information;

Physical layer indication information and MAC layer indication information; and

Two kinds of MAC layer indication information.
The apparatus according to claim 18, wherein the physical layer indication information includes at least one of the following:

A radio network temporary identifier (RNTI) used to scramble the CRC of the physical downlink control channel (PDCCH) for scheduling the random access response;

The content of the PDCCH for scheduling the random access response; and

The format of the PDCCH for scheduling the random access response.
The device according to claim 18, wherein the MAC layer indication information includes at least one of the following:

The Medium Access Control Control Unit (MAC CE) included in the random access response transmission block;

The content of the random access response contained in the random access response transmission block; and

The random access response subheader included in the random access response transmission block.