WO2020210963A1

WO2020210963A1 - Message transmission method and device

Info

Publication number: WO2020210963A1
Application number: PCT/CN2019/082779
Authority: WO
Inventors: 徐伟杰; 唐海
Original assignee: Oppo广东移动通信有限公司
Priority date: 2019-04-15
Filing date: 2019-04-15
Publication date: 2020-10-22
Also published as: CN112740808A; CN112740808B

Abstract

Provided are a message transmission method and device, capable of flexibly adjusting a time interval between different messages. The method comprises: a terminal device sends, according to a TA of a first massage, the first message; the terminal device sends, according to a TA of a second massage, the second message, wherein the first message and the second message are two messages continuously transmitted, and the TA of the second message and the TA of the first message are not equal.

Description

Method and equipment for message transmission

Technical field

The embodiments of the present application relate to the field of communications, and more specifically, to methods and devices for message transmission.

Background technique

The 5G system, or New Radio (NR) system, supports data transmission on an unlicensed spectrum (unlicensed spectrum). In the NR (NR-based access to unlicensed spectrum, NR-U) system of the unlicensed frequency band, information transmission needs to be based on the principle of Listen Before Talk (LBT). That is, before sending a message, channel listening needs to be performed. It can only be sent when the listening result is that the channel is idle, and cannot be sent when the listening result is that the channel is busy. When the time interval between two consecutive messages sent is less than 16us, there is no need to perform LBT before sending the message for the second time. It can be seen that, compared to the message transmission on the licensed frequency spectrum, the message transmission on the unlicensed frequency band has uncertainty. Therefore, how to achieve more effective message transmission, especially the message transmission on the unlicensed frequency band, has become an urgent problem to be solved.

Summary of the invention

The present application provides a method and device for message transmission, which can flexibly adjust the time interval between different messages and realize more effective message transmission.

In a first aspect, a message transmission method is provided, which includes: a terminal device sends the first message according to the TA of the first message; the terminal device sends the second message according to the TA of the second message, where , The first message and the second message are two messages that are continuously transmitted, and the TA of the second message is not equal to the TA of the first message.

In a second aspect, a method for message transmission is provided, including: a terminal device sends a first message; the terminal device sends a second message, wherein the second message includes data and a placeholder signal located before the data The occupancy signal occupies at least part of the GT of the first message.

In a third aspect, a method for message transmission is provided, including: a network device receives the first message according to the TA of the first message; the network device receives the second message according to the TA of the second message, wherein , The first message and the second message are two messages that are continuously transmitted, and the TA of the second message is not equal to the TA of the first message.

In a fourth aspect, a method for message transmission is provided, including: a network device receives a first message; the network device receives a second message, where the second message includes data and a placeholder signal located before the data The occupancy signal occupies at least part of the GT of the first message.

In a fifth aspect, a terminal device is provided, and the terminal device can execute the foregoing first aspect or the method in any optional implementation manner of the first aspect. Specifically, the terminal device may include a functional module for executing the foregoing first aspect or any possible implementation manner of the first aspect.

In a sixth aspect, a terminal device is provided, and the terminal device can execute the foregoing second aspect or any optional implementation method of the second aspect. Specifically, the terminal device may include a functional module for executing the foregoing second aspect or any possible implementation of the second aspect.

In a seventh aspect, a network device is provided, which can execute the foregoing third aspect or any optional implementation method of the third aspect. Specifically, the network device may include a functional module for executing the foregoing third aspect or any possible implementation of the third aspect.

In an eighth aspect, a network device is provided, and the network device can execute the foregoing fourth aspect or any optional implementation method of the fourth aspect. Specifically, the network device may include a functional module for executing the foregoing fourth aspect or any possible implementation manner of the fourth aspect.

In a ninth aspect, a terminal device is provided, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, execute the method in the first aspect or any possible implementation of the first aspect, or execute the second aspect or the first aspect. The method in any possible implementation of the two aspects.

In a tenth aspect, a network device is provided, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, execute the method in the third aspect or any possible implementation of the third aspect, or execute the fourth aspect or the third aspect. Any of the four possible implementation methods.

In an eleventh aspect, a chip including a processor is provided. The processor is used to call and run a computer program from the memory, so that the device installed with the chip executes the method in any possible implementation of the first aspect or the first aspect, or executes the second aspect or the second aspect. Any possible implementation method.

In a twelfth aspect, a chip including a processor is provided. The processor is used to call and run a computer program from the memory, so that the device installed with the chip executes the method in any possible implementation of the third aspect or the third aspect, or executes the fourth aspect or the fourth aspect. Any possible implementation method.

In a thirteenth aspect, a computer-readable storage medium is provided for storing a computer program that enables a computer to execute the method in the first aspect or any possible implementation of the first aspect, or execute the second Aspect or any possible implementation of the second aspect.

In a fourteenth aspect, a computer-readable storage medium is provided for storing a computer program that enables a computer to execute the method in the third aspect or any possible implementation of the third aspect, or execute the fourth Aspect or any possible implementation of the fourth aspect.

In a fifteenth aspect, a computer program product is provided, including computer program instructions that cause a computer to execute the method in the first aspect or any possible implementation of the first aspect, or execute the second aspect or The method in any possible implementation of the second aspect.

In a sixteenth aspect, a computer program product is provided, including computer program instructions that cause the computer to execute the method in the third aspect or any possible implementation of the third aspect, or execute the fourth aspect or The method in any possible implementation of the fourth aspect.

In a seventeenth aspect, a computer program is provided, which when it runs on a computer, causes the computer to execute the method in the first aspect or any possible implementation of the first aspect, or execute the second aspect or the second aspect. The method in any possible implementation of the aspect.

The eighteenth aspect provides a computer program that, when run on a computer, causes the computer to execute the method in the third aspect or any possible implementation of the third aspect, or execute the fourth aspect or the fourth aspect. The method in any possible implementation of the aspect.

In a nineteenth aspect, a communication system is provided, including terminal equipment and network equipment.

The terminal device is configured to: send the first message according to the TA of the first message; send the second message according to the TA of the second message;

The network device is configured to: receive the first message according to the TA of the first message; receive the second message according to the TA of the second message;

The first message and the second message are two messages that are continuously transmitted, and the TA of the second message is not equal to the TA of the first message.

In a twentieth aspect, a communication system is provided, including terminal equipment and network equipment.

The terminal device is configured to: send a first message; send a second message, where the second message includes data and an occupant signal located before the data;

The network device is configured to: receive a first message; receive a second message, where the second message includes data and an occupant signal located before the data;

Wherein, the occupying signal occupies at least part of the guard time GT of the first message.

Based on the above technical solution, in an implementation manner, different TAs are used for message transmission, thereby flexibly adjusting the time interval between two adjacent messages. Especially for message transmission on an unlicensed frequency band, the time interval between two adjacent messages can be reduced by configuring different TAs, avoiding multiple LBTs caused by too large time intervals, and reducing transmission delay.

In another implementation, it is used to add a placeholder signal to the message, so as to flexibly adjust the time interval between two adjacent messages. Especially for message transmission on unlicensed frequency bands, the time interval between two adjacent messages can be reduced by increasing the occupying signal, avoiding multiple LBTs caused by excessive time interval, and reducing transmission delay.

Description of the drawings

Fig. 1 is a schematic diagram of a possible wireless communication system applied by an embodiment of the present application.

Figure 2 is a schematic flow chart of the 4-step random access.

Figure 3 is a schematic flow chart of 2-step random access

Fig. 4 is a schematic diagram of the time slot structure of the first message in 2-step random access.

Fig. 5 is a flow interaction diagram of a message transmission method according to an embodiment of the present application.

6(a) and 6(b) are schematic diagrams of transmitting Msg A based on the method of FIG. 5.

Fig. 7 is a flow interaction diagram of a message transmission method according to another embodiment of the present application.

FIG. 8 is a schematic diagram of using a cyclic prefix to occupy positions according to an embodiment of the present application.

9(a) and 9(b) are schematic diagrams of transmitting Msg A based on the method of FIG. 7.

FIG. 10 is a schematic block diagram of a terminal device according to an embodiment of the present application.

FIG. 11 is a schematic block diagram of a terminal device according to an embodiment of the present application.

Fig. 12 is a schematic block diagram of a network device according to an embodiment of the present application.

FIG. 13 is a schematic block diagram of a network device according to an embodiment of the present application.

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

FIG. 15 is a schematic structural diagram of a chip of an embodiment of the present application.

Fig. 16 is a schematic block diagram of a communication system according to an embodiment of the present application.

FIG. 17 is a schematic block diagram of a communication system according to another embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings.

The technical solutions of the embodiments of this application can be applied to various communication systems, for example: Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (Time Division Duplex) , TDD) system, Advanced long term evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE-based access to unlicensed on unlicensed frequency bands spectrum, LTE-U) system, NR (NR-based access to unlicensed spectrum, NR-U) system on unlicensed frequency bands, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, WiFi), the future 5G system (may also be called New Radio (NR) system or other communication systems, etc.).

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, Device to Device (D2D). ) Communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (MTC), and vehicle to vehicle (V2V) communication, etc. The embodiments of this application can also be applied to these communication systems .

Optionally, the communication system in the embodiment of the present application may also be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, a standalone (SA) network deployment scenario, etc.

Fig. 1 is a schematic diagram of a possible wireless communication system applied by an embodiment of the present application. The wireless communication system 100 may include a network device 110. The network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices located in the coverage area.

Optionally, the network device 100 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or the wireless controller in the Cloud Radio Access Network (CRAN), or the network device can be a relay station, access point, vehicle-mounted device, wearable device, Network equipment in the future network side equipment or the future evolution of the public land mobile network (Public Land Mobile Network, PLMN), etc.

The wireless communication system 100 further includes at least one terminal device 120 located within the coverage area of the network device 110.

The terminal device 120 may be mobile or fixed.

Alternatively, the terminal device 120 may refer to a user equipment, an access terminal, a user unit, a user station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. The terminal device can also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network, or future evolution of the public land mobile network (Public Land Mobile Network, PLMN) Terminal equipment, etc., this embodiment of the present application does not limit this. Wherein, optionally, direct terminal (D2D) communication may also be performed between the terminal devices 120.

The network device 110 may provide services for a cell, and the terminal device 120 communicates with the network device 110 through transmission resources used by the cell, such as frequency domain resources, or spectrum resources. The cell may be a cell corresponding to the network device 110 (such as a base station). The cell may belong to a macro base station or a base station corresponding to a small cell. The small cell here may include: Metro cell, micro cell (Micro cell), pico cell (Pico cell), femto cell (Femto cell), etc. These small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-rate data transmission services.

Fig. 1 exemplarily shows one network device and two terminal devices, but the application is not limited to this. The wireless communication system 100 may include a plurality of network devices, and the coverage area of each network device may include other numbers of terminal devices. In addition, the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity, for example.

The following briefly introduces the random access process and related content of the unlicensed frequency band.

After the cell search process, the terminal device has achieved downlink synchronization with the cell, so the terminal device can receive downlink data. However, the terminal equipment can only perform uplink transmission if it has achieved uplink synchronization with the cell. The terminal device can establish a connection with the cell and obtain uplink synchronization through a random access procedure (Random Access Procedure, RAR). That is to say, through random access, the terminal device can obtain uplink synchronization and obtain the unique identifier assigned to it by the network device, namely, the Cell Radio Network Temporary Identity (C-RNTI). Therefore, the random access procedure can be applied not only in initial access, but also in the case where the user's uplink synchronization is lost. The random access process may include a 4-step random access process and a 2-step random access process. For ease of understanding, the 4-step random access process and the 2-step random access process will be introduced in conjunction with Figure 2 and Figure 3 respectively.

The 4-step random access process and the 2-step random access process can usually be triggered by one of the following six types of trigger events:

(1) Initial access (initial access).

The terminal device enters the RRC connected state (RRC_CONNECTED) from the radio resource control (Radio Resource Control, RRC) idle state (RRC_IDLE state).

(2) Handover.

When a terminal device needs to establish uplink synchronization with a new cell, it needs to initiate random access in the new cell.

(3) RRC Connection Re-establishment (RRC Connection Re-establishment).

After a radio link failure (Radio Link Failure, RLF) occurs in the terminal device, the wireless connection is re-established.

(4) In the RRC connection state, when the downlink data arrives, the uplink is in an "unsynchronized" state.

At this time, after the downlink data arrives, the terminal device needs to reply with an Acknowledgement (ACK) message or a Negative Acknowledgement (NACK) message.

(5) In the RRC connection state, when the uplink data arrives, the uplink is in an "unsynchronized" state or there is no available physical uplink control channel (PUCCH) resource for scheduling request (SR) transmission.

When uplink data arrives, for example, when it needs to report a measurement report or send data, if the uplink is in the "out of synchronization" state, the terminal device can initiate a random access process; or if the terminal device that is already in the uplink synchronization state is allowed to use the random access channel Access Channel (RACH) replaces the role of SR, so when the uplink is in the "out of synchronization" state, the terminal device can initiate a random access process.

(6) In the RRC connection state, for positioning, the terminal device needs to obtain a timing advance (Timing Advance, TA).

In addition, the random access process may also be triggered due to the transition of the RRC active state (RRC_INACTIVE), other system information (Other System Information, OSI), or beam failure recovery (beam failure recovery).

In the embodiment of this application, the first message to the fourth message in the 4-step random access process are recorded as Msg 1, Msg 2, Msg3, and Msg 4, respectively, and the first message in the 2-step random access process The first message and the second message are recorded as Msg A and Msg B respectively.

Figure 2 is a flow chart of 4-step random access. As shown in Figure 2, the 4-step random access process can include the following four steps:

Step 1. The terminal device sends Msg 1.

The terminal device sends Msg 1 to the network device to tell the network device that the terminal device has initiated a random access request. Msg 1 carries a random access preamble (Random Access Preamble, RAP), or it is called a preamble, a random access preamble sequence, a preamble sequence, etc. At the same time, Msg 1 can also be used for network equipment to estimate the transmission delay between it and the terminal equipment and to calibrate the uplink time accordingly.

Step 2. The network device sends Msg 2.

After receiving the Msg 1 sent by the terminal device, the network device sends Msg 2, that is, a random access response (Random Access Response, RAR) message to the terminal device. The Msg 2 can be scrambled through a random access radio network temporary identity (Random Access Radio Network Temporary Identity, RA-RNTI). The terminal device can monitor the Physical Downlink Control Channel (PDCCH) in the RAR window to receive the RAR message scrambled with the RA-RNTI, regardless of the measurement gap that may occur. .

If the terminal device does not receive the RAR message replies from the network device within the RAR window, it is considered that this random access has failed. If the terminal device successfully detects the RAR message in the RAR window and the index of the preamble carried in the RAR message is the same as the index of the preamble in Msg 1, the terminal device can stop detecting the RAR message. The terminal device can use RA-RNTI to descramble the RAR message.

Wherein, the RAR message may include response messages for multiple terminal devices that send the preamble. Among them, the response message for each terminal device includes the random access preamble index (Random Access Preamble Identify, RAPID), Msg 3 resource allocation information, and time advance (Time Advance, TA) adjustment information used by the terminal device. , And Temporary Cell-Radio Network Temporary Identity (TC-RNTI), etc.

In the NR standard, the RAR message can be scheduled in a downlink control information (Download Control Information, DCI) format (DCI format) 1-0, and the PDCCH for scheduling the RAR message can be scrambled using the aforementioned RA-RNTI.

Step 3. The terminal device sends Msg 3.

After receiving the RAR message, the terminal device determines whether the RAR is its own RAR message. For example, the terminal device can use the preamble index to check, and after determining that the RAR message is its own RAR message, Msg 3 is generated at the RRC layer. , And send Msg 3 to the network device, which needs to carry the identification information of the terminal device, etc.

For different random access trigger events, the Msg 3 sent by the terminal device in step 3 of the 4-step random access process may include different content.

For example, for the initial access scenario, Msg 3 includes the RRC Connection Request message (RRC Connection Request) generated by the RRC layer, which at least carries the non-access stratum (Non-Access Stratum, NAS) identification information of the terminal device. In addition, Msg 3 may also carry, for example, the serving temporary mobile subscriber identity (Serving-Temporary Mobile Subscriber Identity, S-TMSI) or random number of the terminal device.

For another example, for the RRC connection re-establishment scenario, Msg 3 includes the RRC Connection Re-establishment Request message (RRC Connection Re-establishment Request) generated by the RRC layer and does not carry any NAS message. In addition, Msg 3 may also carry, for example, a Cell Radio Network Temporary Identifier (C-RNTI) and protocol control information (Protocol Control Information, PCI).

For another example, for a handover scenario, Msg 3 includes an RRC handover confirmation message (RRC Handover Confirm) generated by the RRC layer, which carries the C-RNTI of the terminal device. In addition, Msg 3 may also carry information such as Buffer Status Report (BSR).

For another example, for other trigger events such as uplink/downlink data arrival scenarios, Msg 3 at least needs to include the C-RNTI of the terminal device.

It should be noted that uplink transmission usually uses terminal device specific information such as C-RNTI to scramble the data carried in the uplink shared channel (Uplink Shared Channel, UL-SCH). But the conflict has not been resolved at this time, so when scrambling Msg 3 cannot be based on C-RNTI, only TC-RNTI can be used.

Step 4. The network device sends Msg 4.

The network device sends Msg 4 to the terminal device, so that the terminal device correctly receives the Msg 4 and completes contention resolution (Contention Resolution). For example, during the RRC connection establishment process, Msg 4 may carry the RRC connection establishment message.

Since the terminal equipment in step 3 can carry its own unique identification in Msg 3, such as C-RNTI or identification information from the core network (such as S-TMSI or a random number), the network equipment will The unique identifier of the terminal device is carried in Msg 4 to specify the terminal device that wins the competition. Other terminal devices that did not win in the contention resolution will re-initiate random access. Among them, the PDCCH used for scheduling Msg 4 can be scrambled by TC-RNTI.

In a 5G system, when a terminal device performs random access, in addition to the above-mentioned 4-step random access method, a 2-step random access method can also be used. One possible way is to send the messages Msg 1 and Msg 3 in the 4-step random access process as the first message in the 2-step random access process, namely Msg A; Msg 2 and Msg 4 are sent as the second message in the 2-step random access process, namely Msg B.

Figure 3 is a flow chart of 2-step random access. As shown in Figure 3, the 2-step random access process can include the following two steps:

Step 1. The terminal device sends Msg A.

Msg A may include preamble and uplink data. The uplink data may be carried on an uplink channel, and the uplink channel may be PUSCH, for example. Wherein, the uplink channel may, for example, carry identification information of the terminal device and the reason for the RRC request. In other words, Msg A can carry part or all of the information in Msg 1 and Msg 3 in the 4-step random access process.

Step 2. The network device sends Msg B.

If the network device successfully receives Msg A sent by the terminal device, it sends Msg B to the terminal device. Msg B may include, for example, conflict resolution information, C-RNTI allocation information, TA adjustment information, and so on. In other words, Msg B can carry part or all of the information in Msg 2 and Msg 4 in the 4-step random access process.

In the 2-step random access process, Msg B carries conflict resolution information for a single terminal device (including information related to the identification of the terminal device sent by the terminal device in Msg A), C-RNTI allocation information, TA adjustment information, etc. In addition, Msg B may also carry RRC connection establishment messages.

It should be understood that FIG. 2 or FIG. 3 is only an example. Among them, Msg A may include part or all of the information carried in Msg 1 and Msg 3, or may also include other information. Msg B may include part or all of the information carried in Msg 2 and Msg 4, or may also include other information.

Since the 2-step random access process has not yet entered the standardization stage, only Figure 3 is used as an example to introduce. There are other possibilities for the definition of each random access message involved, and the 2-step random access is not limited. Other definitions of each random access message in the process. The method described in the embodiment of this application is applicable to all other 2-step random access procedures.

In the NR system, data transmission on unlicensed frequency bands (or called unlicensed spectrum) is supported. Unlicensed frequency bands are the spectrum that can be used for radio equipment communications divided by countries and regions. This spectrum is usually considered to be a shared spectrum, that is, devices in different systems can use the spectrum as long as they meet the regulatory requirements set by the country or region on the spectrum. Spectrum, there is no need to apply for a proprietary spectrum authorization from the government. In order to allow various communication systems that use unlicensed spectrum for wireless communication to coexist friendly on this spectrum, some countries or regions have stipulated the legal requirements that must be met when using unlicensed spectrum.

For example, in Europe and other regions, the equipment follows the principle of LBT. That is, before the device sends a message on the unlicensed spectrum channel, it needs to perform channel listening first. It can only be sent when the result of channel detection is that the channel is idle; when the result of channel detection is that the channel is busy, it cannot be sent. Therefore, compared with the message transmission on the licensed spectrum, the message transmission on the unlicensed frequency band has uncertainty.

Fig. 4 is a schematic diagram of a typical time slot structure of Msg A with 2-step random access. Among them, Msg A includes two parts: preamble and PUSCH. The preamble occupies a continuous time domain symbol, and the preamble is fixedly followed by a guard time (Guard Time, GT). The preamble and its GT occupy several symbols. For example, as shown in Fig. 4, the preamble and its GT occupy 6 symbols.

In 2-step random access, PUSCH transmission and preamble transmission are independent of each other. PUSCH is transmitted after the preamble and its GT, and there are several symbol offsets between the PUSCH and the GT of the preamble. Among them, the PUSCH may adopt an orthogonal frequency division multiple access (Orthogonal Frequency Division Multiplexing, OFDM) manner, for example, and occupy multiple OFDM symbols. For example, as shown in FIG. 4, there is a 4 symbol offset between the PUSCH and the GT of the preamble, and the PUSCH occupies 3 symbols.

In NR-U, multiple devices, or even devices of different systems, such as wireless fidelity (Wireless Fidelity, WiFi) systems, need to share unlicensed frequency bands through channel preemption. Therefore, the device needs to perform LBT before sending a message, and can send it only after determining that the channel is free. And, when the time interval between two consecutive messages sent is less than 16us, there is no need to perform LBT before sending the message for the second time.

Therefore, in the 2-step random access process, if the time interval between the PUSCH and the preamble exceeds 16us, after the preamble is sent, LBT is required to send the PUSCH again, which increases the 2-step random access in NR-U The access delay reduces the system reliability.

In addition, in the 2-step random access process, the setting of the GT is related to the radius of the supported cell. The larger the radius of the supported cell, the larger the GT. For the case of independent transmission of PUSCH and preamble shown in Figure 4, Msg A is the first message of 2-step random access. At this time, the terminal device has not yet obtained the timing advance (TA) and other information, so PUSCH A GT is also required, not shown in Figure 4. This requires occupying part of the spectrum resources.

The embodiment of the present application proposes a message transmission solution, which can flexibly adjust the time interval between different messages to achieve more effective message transmission. Especially when this solution is applied to the transmission of the preamble and PUSCH in Msg A, it can reduce the delay of 2-step random access and save spectrum resources.

FIG. 5 is a schematic flowchart of a method 500 for message transmission according to an embodiment of the present application. The method described in FIG. 5 can be executed by a terminal device and a network device. The terminal device may be, for example, the terminal device 120 shown in FIG. 1, and the network device may be, for example, the network device 110 shown in FIG. 1. As shown in FIG. 5, the method 500 for message transmission may include some or all of the following steps. among them:

In 510, the terminal device sends the first message according to the timing advance (Timing Advance, TA) of the first message.

In 520, the terminal device sends the second message according to the TA of the second message.

In 530, the network device receives the first message according to the TA of the first message;

In 540, the network device receives the second message according to the TA of the second message

Wherein, the first message and the second message are two messages continuously transmitted, and the TA of the second message is not equal to the TA of the first message.

In this embodiment, the terminal device can use different TAs to send the first message and the second message respectively, so that the time interval between the first message and the second message in the actual transmission process can be flexibly adjusted through the different TAs.

Usually, messages are delayed in space transmission. For example, if the terminal device is farther and farther from the network device, the message sent from the terminal device to the base station will arrive at the network device later and later. This delay may cause interference between messages sent by the terminal device received by the network device and messages sent by other terminal devices received by the network device. Therefore, after the terminal device obtains the TA configured by the network device, it sends the message in advance based on the TA, thereby reducing the aforementioned delay and ensuring effective transmission of the message.

Wherein, the TA described in the embodiment of the present application may be 0 or greater than zero. For example, if the TA of the first message is equal to 0, it means that the first message does not need to be sent in advance; when the TA of the first message is greater than 0, the first message is sent in advance based on the TA.

The first message may include a data part and a guard time (GT) located after the data part. The value of GT may be selected from several values specified in the agreement, for example.

Optionally, the second message may occupy at least part of the GT of the first message.

At this time, the first message and the second message can also be regarded as a whole, that is, the first message and the second message are combined into one message. Therefore, the GT may not be set in the second message, so that the spectrum efficiency of the system is improved.

Optionally, the method further includes: the network device sends first indication information, where the first indication information is used to indicate the TA of the first message and/or the TA of the second message. Correspondingly, the terminal device receives the first indication information.

For example, the TA of the first message is a preset value, and the first indication information is used to indicate the offset of the TA of the second message relative to the preset value.

The offset is greater than or equal to zero.

The preset value may be configured by the network device, or pre-configured, for example, agreed upon by a protocol.

Assume that the TA of the first message is TA 1, and the TA of the second message is TA 2. When TA1=0, the first indication message can be used to indicate TA2; when TA1≠0, the first indication message can be used to indicate the offset of TA2 relative to TA1, namely TA2-TA1 .

Further, optionally, the network device may send a broadcast message by the device, and the broadcast message includes the first indication information. Correspondingly, the terminal device receives the broadcast message.

The method can be applied to various communication systems, and can be applied to both unlicensed frequency bands and licensed frequency bands. When the method is applied in an unlicensed frequency band, optionally, the time interval between the second message and the non-GT part of the first message is less than a preset value. Wherein, the preset value is, for example, the minimum time interval for performing LBT, such as 16 us.

Because in the unlicensed frequency band, when the time interval between two consecutive messages sent is less than 16us, there is no need to perform LBT before sending the message for the second time. Therefore, by configuring the TA of the first message to be different from the TA of the second message, the time interval between the second message and the first message can be reduced, so that the time interval between the two messages is less than 16 us, thereby avoiding frequent LBT reduces the transmission delay.

Optionally, in 510, the terminal device sends the first message according to the TA of the first message based on the first resource. Correspondingly, in 530, the network device receives the first message according to the TA of the first resource. The first news.

Optionally, in 520, the terminal device sends the second message according to the TA of the second message based on the second resource. Correspondingly, in 540, the network device sends the second message based on the second resource and according to the TA of the second message. Receive the second message.

The first resource is a resource configured to transmit the first message, and the second resource is a resource configured to transmit the second message.

For example, the second resource may be located after the first resource without a symbol interval. Wherein, the first resource includes a resource used to transmit data in the first message, and a GT located behind the resource, and the second resource is located behind the GT without a symbol interval.

The second resource and the first resource may be configured by the network device, or pre-configured, for example, agreed upon by a protocol.

It can be understood that the first resource may be considered as a resource nominally used to transmit the first message, and the first resource satisfies frame alignment and symbol alignment in the time domain. For example, when the TA of the first message is 0, the terminal device sends the first message on the first resource. At this time, the resource that actually sends the first message is the first resource; when the TA of the first message is When the value is not 0, the terminal device may send the first message in advance by the TA value. In this case, the resource for actually sending the first message is earlier than the first resource.

Similarly, the second resource may be considered as a resource nominally used to transmit the second message, and the second resource satisfies frame alignment and symbol alignment in the time domain. For example, when the TA of the second message is 0, the terminal device sends the first message on the second resource. At this time, the resource that actually sends the second message is the second resource; when the TA of the second message is When the value is not 0, the terminal device may send the second message in advance by the TA value. At this time, the resource for actually sending the second message is earlier than the second resource.

Optionally, the frequency band occupied by the second message is within the frequency band occupied by the first message. This can avoid signal interference generated on different frequency bands.

The embodiment of the present application does not limit the first message and the second message. For example, the first message may be the preamble in the first message of 2-step random access, and the second message may be the PUSCH in the first message of 2-step random access.

The first message and the second message together can be called the first message of the 2-step random access process, or the message sent in the first step of the 2-step random access process. For the specific details of the first message, refer to the description of Msg A in FIG. 3 above.

In the following, with reference to Figure 6(a) and Figure 6(b), taking the first message as the preamble in Msg A and the second message as the PUSCH in Msg A as an example, the method for message transmission in this embodiment of the application will be described in detail. .

Figure 6(a) shows the configured preamble resource for transmitting the preamble and the PUSCH resource for transmitting the PUSCH. Wherein, the preamble resource also includes a GT, and the PUSCH resource is located after the GT without a symbol interval. When the preamble and PUSCH both use the same TA, assuming that the TA is 0, as shown in Figure 6(a), the terminal device sends the preamble on the preamble resource and sends the PUSCH on the PUSCH resource. Since the GT between the PUSCH and the preamble is greater than 16us, when the terminal device performs LBT to obtain the channel use right and sends the preamble to the network device, it needs to perform LBT again and send the PUSCH after obtaining the channel use right. The delay affects the random access of terminal equipment.

At this time, as shown in Figure 6(b), different TAs can be configured for the preamble and PUSCH respectively. Assuming that the TA of the preamble is 0 and the TA of the PUSCH is t1, the terminal device sends the preamble on the preamble resource, The PUSCH is sent in advance of t1, where t1 should satisfy t1>GT-16us, and t2 is the time interval between the actual transmitted PUSCH and the preamble. Since t1+t2=GT, t2<16us, that is, the time interval between the PUSCH and the preamble is less than 16us. Therefore, after the terminal device performs LBT to obtain the channel use right and sends the preamble to the network device, it does not need to perform LBT again, and can then send the PUSCH, avoiding additional LBT, and improving the efficiency of random access.

In the embodiment of the present application, the TA of the subsequent message can be adjusted in two adjacent messages, such as the TA of the PUSCH in FIG. 6; the TA of the preceding message, such as the TA of the preamble in FIG. 6 can also be adjusted. Increasing the TA of the succeeding message and decreasing the TA of the preceding message can both reduce the time interval between two messages during actual transmission, reducing the TA of the succeeding message and increasing the TA of the preceding message. Most of them can increase the time interval between two messages in actual transmission.

Therefore, by setting different TAs, the time interval between two adjacent messages can be flexibly adjusted. Especially for message transmission on an unlicensed frequency band, the time interval between two adjacent messages can be reduced by configuring different TAs, avoiding multiple LBTs caused by too large time intervals, and reducing transmission delay.

FIG. 7 is a schematic flowchart of a method 700 for message transmission according to an embodiment of the present application. The method described in Figure 7 can be executed by terminal equipment and network equipment. The terminal device may be, for example, the terminal device 120 shown in FIG. 1, and the network device may be, for example, the network device 110 shown in FIG. 1. As shown in FIG. 7, the method 700 for message transmission may include some or all of the following steps. among them:

In 710, the terminal device sends a first message.

In 720, a second message is sent.

In 730, the network device receives the first message;

In 740, the network device receives the second message.

Wherein, the second message includes data and an occupant signal located before the data.

In this embodiment, by adding a seat signal to the second message, the time interval between the first message and the second message in the actual transmission process can be flexibly adjusted.

For example, the first message and the second message are two messages that are continuously transmitted. When the second message is after the first message, a placeholder signal can be set before the data part of the second message, thereby reducing the time interval between the second message and the first message; when the second message is before the first message When the time, the occupying signal can be set after the data part of the second message, thereby reducing the time interval between the second message and the first message.

The first message may include a data part and a GT located after the data part. The value of GT may be selected from several values specified in the agreement, for example.

Optionally, the occupying signal occupies at least part of the GT of the first message.

Optionally, the occupying signal is a cyclic prefix (Cyclic Prefix, CP) of the second message.

For example, the occupying signal is the CP of the data on the first symbol of the second message.

At this time, optionally, another part of the CP is located within the first symbol.

The CP corresponding to the data can be generated based on the data. Usually, CP is constructed by moving the data at the end of the OFDM symbol to the head, which has the functions of eliminating inter-symbol interference and inter-channel interference.

For example, when the first symbol occupied by the second message shown in Figure 8 is not needed for the occupying signal, the sample 1 at the end of the symbol is moved to the head of the symbol to form the symbol The CP of the data is the CP part 1 shown in Figure 8. In order to reduce the time interval between the second message and the previous first message, a placeholder signal can be set before the symbol. At this time, the sample point 1 and sample point 2 at the end of the symbol can be moved before the data part in the symbol to form a new CP. The new CP includes not only the CP part 1, but also the first symbol The previous CP part 2, CP2 can be used as a placeholder signal for the second message.

Because in the unlicensed frequency band, when the time interval between two consecutive messages sent is less than 16us, there is no need to perform LBT before sending the message for the second time. Therefore, the time interval between the second message and the first message can be reduced by setting the occupying signal in the second message, so that the time interval between the two messages is less than 16us, thereby avoiding frequent LBT and reducing Transmission delay.

Optionally, in 710, the terminal device sends the first message based on the first resource, and correspondingly, in 530, the network device receives the first message based on the first resource.

Optionally, in 720, the terminal device sends the second message based on the second resource, and correspondingly, in 740, the network device receives the second message based on the second resource.

It can be understood that the first resource may be considered as a resource nominally used to transmit the first message, the second resource may be considered to be a resource nominally used to transmit a second message, and the first resource and the second resource are in the time domain. The upper meets the frame alignment and symbol alignment. For example, when the second message does not include the occupancy signal, the terminal device sends the second message on the second resource. At this time, the resource that actually sends the second message is the second resource; when it is in the second message When the occupancy signal is included, the resource for actually sending the second message includes the second resource and the resource used for transmitting the occupancy signal before the second resource.

In the following, with reference to Figure 9(a) and Figure 9(b), taking the first message as the preamble in Msg A and the second message as the PUSCH in Msg A as an example, the method of message transmission in this embodiment of the application will be described in detail. .

Figure 9(a) shows the configured preamble resource for transmitting the preamble and the PUSCH resource for transmitting the PUSCH. Wherein, the preamble resource also includes a GT, and the PUSCH resource is located after the GT without a symbol interval. Assuming that the TA of the preamble and PUSCH are both 0, as shown in FIG. 9(a), the terminal device sends the preamble on the preamble resource and sends the PUSCH on the PUSCH resource. Since the GT between the PUSCH and the preamble is greater than 16us, when the terminal device performs LBT to obtain the channel use right and sends the preamble to the network device, it needs to perform LBT again and send the PUSCH after obtaining the channel use right. The delay affects the random access of terminal equipment.

At this time, as shown in FIG. 9(b), a placeholder signal with a length of t1 can be placed in the PUSCH. The terminal device sends the preamble on the preamble resource, and then sends the placeholder signal and data part in the PUSCH, where the placeholder signal starts to be transmitted during the t1 period, which is equivalent to the placeholder signal being preempted by the PUSCH in advance A resource whose duration is t1. t1 should satisfy t1>GT-16us, and t2 is the time interval between the actual transmitted PUSCH and the preamble. Since t1+t2=GT, then t2<16us, that is, the time interval between the PUSCH and the preamble is less than 16us. Therefore, after the terminal device performs LBT to obtain the channel use right and sends the preamble to the network device, it does not need to perform LBT again, and can then send the PUSCH, avoiding additional LBT, and improving the efficiency of random access.

In the embodiment of the present application, in two adjacent messages, a occupant signal may be configured for the subsequent message, or an occupant signal may be configured for the previous message. Setting a placeholder signal at the head of a later message and setting a placeholder signal at the end of a previous message can reduce the time interval between two messages in actual transmission.

Therefore, it has been used to add a placeholder signal to the message to flexibly adjust the time interval between two adjacent messages. Especially for message transmission on unlicensed frequency bands, the time interval between two adjacent messages can be reduced by increasing the occupying signal, avoiding multiple LBTs caused by excessive time interval, and reducing transmission delay.

It should be understood that the two ways of setting different TAs and setting the occupant signal in the message can be implemented separately or in combination. That is, at least one of the following operations may be performed on the first message and/or the second message: setting the same or different TA; setting a placeholder signal for the second message; setting a placeholder signal for the first message. As long as the time interval between the first message and the second message can meet the required conditions.

The data in the embodiments of the present application may refer to service data and/or control signals. And, the message can also be replaced with information, signal, data, channel, etc.

In the above, the description is made by taking the terminal device using the method of the embodiment of the present application to send a message as an example, but the embodiment of the present application is not limited thereto. The network device may also send the third message and the fourth message using the method in the embodiment of the present application. For example, the network device separately sends the third message and the fourth message based on different TAs and/or sets a place signal for one of the messages, so as to flexibly adjust the time interval between the third message and the fourth message in the actual sending process.

The random access process described in the embodiments of this application includes but is not limited to the initial access process, and can be a contention-based random access process (contention-based RACH) or a non-competition-based random access process (contention free RACH) .

It should be noted that, under the premise of no conflict, the various embodiments described in this application and/or the technical features in each embodiment can be combined with each other arbitrarily, and the technical solutions obtained after the combination should also fall within the protection scope of this application. .

In the various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not correspond to the implementation process of the embodiments of the present application. Constitute any limitation.

The message transmission method according to the embodiment of the present application is described in detail above. The device according to the embodiment of the present application will be described below in conjunction with FIG. 10 to FIG. 17. The technical features described in the method embodiment are applicable to the following device embodiments.

FIG. 10 is a schematic block diagram of a terminal device 1000 according to an embodiment of the present application. As shown in FIG. 10, the terminal device 1000 includes a sending unit 1010. Optionally, the terminal device further includes a receiving unit 1020. among them:

The sending unit 1010 is configured to: send the first message according to the TA of the first message; send the second message according to the TA of the second message; wherein, the first message and the second message For two messages that are continuously transmitted, the TA of the second message is not equal to the TA of the first message.

Therefore, by using different TAs for message transmission, the time interval between two adjacent messages can be flexibly adjusted. Especially for message transmission on an unlicensed frequency band, the time interval between two adjacent messages can be reduced by configuring different TAs, avoiding multiple LBTs caused by too large time intervals, and reducing transmission delay.

Optionally, the second message occupies at least part of the guard time GT of the first message.

Optionally, the receiving unit 1020 is configured to receive first indication information, where the first indication information is used to indicate the TA of the first message and/or the TA of the second message.

Optionally, the TA of the first message is a preset value, and the first indication information is used to indicate an offset of the TA of the second message with respect to the preset value.

Optionally, the receiving unit 1020 is specifically configured to: receive a broadcast message, where the broadcast message includes the first indication information.

Optionally, the terminal device uses an unlicensed frequency band.

Optionally, the time interval between the second message and the non-GT part of the first message is less than a preset value, and the preset value is the minimum time interval for performing LBT.

Optionally, the preset value is 16 microseconds.

Optionally, the sending unit 1010 is specifically configured to:

Based on the first resource, sending the first message according to the TA of the first message;

Based on the second resource, sending the second message according to the TA of the second message;

Wherein, the first resource is a resource configured to transmit the first message, the second resource is a resource configured to transmit the second message, and the second resource is located at an unsigned interval After the first resource.

Optionally, the first message is the preamble in the first message of the 2-step random access, and the second message is the PUSCH in the first message of the 2-step random access.

Optionally, the frequency band occupied by the second message is within the frequency band occupied by the first message.

It should be understood that the terminal device 1000 can perform corresponding operations performed by the terminal device in the method 500 of the embodiment of the present application, and for the sake of brevity, details are not described herein again.

FIG. 11 is a schematic block diagram of a terminal device 1100 according to an embodiment of the present application. As shown in FIG. 11, the terminal device 1100 includes a sending unit 1110 for:

Send the first message;

Sending a second message, where the second message includes data and a placeholder signal located before the data, and the placeholder signal occupies at least part of the GT of the first message.

Optionally, the occupying signal is the cyclic prefix CP of the data on the first symbol.

Optionally, another part of the CP is located within the first symbol.

Optionally, the terminal device uses an unlicensed frequency band.

Optionally, the preset value is 16 microseconds.

Optionally, the sending unit 1110 is specifically configured to: send the first message based on a first resource; send the second message based on a second resource; wherein, the first resource is configured for transmission The resource of the first message, the second resource is a resource configured to transmit the second message, and the second resource is located after the first resource without a symbol interval.

Optionally, the timing advance TA of the second message is equal to the TA of the first message.

It should be understood that the terminal device 1100 can perform corresponding operations performed by the terminal device in the method 700 of the embodiment of the present application, and for the sake of brevity, details are not described herein again.

FIG. 12 is a schematic block diagram of a network device 1200 according to an embodiment of the present application. As shown in FIG. 12, the network device 1200 includes a receiving unit 1210. Optionally, the network device 1200 further includes a sending unit 1220. among them:

The receiving unit 1210 is configured to: receive the first message according to the timing advance TA of the first message; receive the second message according to the TA of the second message; wherein, the first message and the second message For two messages that are continuously transmitted, the TA of the second message is not equal to the TA of the first message.

Optionally, the second message occupies at least part of the GT of the first message.

Optionally, the sending unit 1220 is configured to send first indication information, where the first indication information is used to indicate the TA of the first message and/or the TA of the second message.

Optionally, the TA of the first message is a preset value, and the first indication information is used to indicate an offset of the TA of the second message relative to the preset value.

Optionally, the sending unit 1220 is specifically configured to send a broadcast message, where the broadcast message includes the first indication information.

Optionally, the network device uses an unlicensed frequency band.

Optionally, the time interval between the second message and the non-GT part of the first message is less than a preset value, and the preset value is the minimum time interval for performing the listen-to-speak LBT.

Optionally, the preset value is 16 microseconds.

Optionally, the receiving unit 1210 is specifically configured to:

Receiving the first message according to the TA of the first message based on the first resource;

Receiving the second message according to the TA of the second message based on the second resource;

It should be understood that the network device 1200 can perform corresponding operations performed by the network device in the method 500 of the embodiment of the present application, and for the sake of brevity, details are not described herein again.

FIG. 13 is a schematic block diagram of a network device 1300 according to an embodiment of the present application. As shown in FIG. 13, the network device 1300 includes a receiving unit 1310, configured to:

Receive the first message;

A second message is received, where the second message includes data and a placeholder signal located before the data, and the placeholder signal occupies at least part of the GT of the first message.

Optionally, another part of the CP is located within the first symbol.

Optionally, the network device uses an unlicensed frequency band.

Optionally, the preset value is 16 microseconds.

Optionally, the receiving unit 1310 is specifically configured to:

Receiving the first message based on the first resource;

Receiving the second message based on the second resource;

Optionally, the first message is the preamble in the first message of the 2-step random access, and the second message is the physical uplink shared channel PUSCH in the first message of the 2-step random access .

It should be understood that the network device 1300 can perform corresponding operations performed by the network device in the method 700 of the embodiment of the present application, and for the sake of brevity, details are not described herein again.

FIG. 14 is a schematic structural diagram of a communication device 1400 according to an embodiment of the present application. The communication device 1400 shown in FIG. 14 includes a processor 1410, and the processor 1410 can call and run a computer program from the memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 14, the communication device 1400 may further include a memory 1420. The processor 1410 may call and run a computer program from the memory 1420 to implement the method in the embodiment of the present application.

The memory 1420 may be a separate device independent of the processor 1410, or it may be integrated in the processor 1410.

Optionally, as shown in FIG. 14, the communication device 1400 may further include a transceiver 1430, and the processor 1410 may control the transceiver 1430 to communicate with other devices. Specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.

Among them, the transceiver 1430 may include a transmitter and a receiver. The transceiver 1430 may further include an antenna, and the number of antennas may be one or more.

Optionally, the communication device 1400 may specifically be a terminal device of an embodiment of the application, and the communication device 1400 may implement the corresponding process implemented by the terminal device in each method of the embodiment of the application. For brevity, details are not repeated here. .

Optionally, the communication device 1400 may specifically be a network device of an embodiment of the application, and the communication device 1400 may implement the corresponding process implemented by the network device in each method of the embodiment of the application. For brevity, details are not repeated here. .

FIG. 15 is a schematic structural diagram of a chip of an embodiment of the present application. The chip 1500 shown in FIG. 15 includes a processor 1510, and the processor 1510 can call and run a computer program from the memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 15, the chip 1500 may further include a memory 1520. The processor 1510 may call and run a computer program from the memory 1520 to implement the method in the embodiment of the present application.

The memory 1520 may be a separate device independent of the processor 1510, or may be integrated in the processor 1510.

Optionally, the chip 1500 may further include an input interface 1530. The processor 1510 can control the input interface 1530 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.

Optionally, the chip 1500 may further include an output interface 1540. The processor 1510 can control the output interface 1540 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.

Optionally, the chip can be applied to the terminal device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the terminal device in the various methods of the embodiment of the present application. For brevity, details are not repeated here.

Optionally, the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the network device in the various methods of the embodiment of the present application. For brevity, details are not described herein again.

The chip described in the embodiments of the present application may also be referred to as a system-level chip, a system-on-chip, a system-on-chip, or a system-on-chip.

The processor in the embodiment of the present application may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The aforementioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

The memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (Synchlink DRAM, SLDRAM) ) And Direct Rambus RAM (DR RAM).

The foregoing memory is exemplary but not restrictive. For example, the memory in the embodiment of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), and synchronous Dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamics Random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiment of the present application is intended to include but not limited to these and any other suitable types of memory.

FIG. 16 is a schematic block diagram of a communication system 1600 according to an embodiment of the present application. As shown in FIG. 16, the communication system 1600 includes a terminal device 1610 and a network device 1620.

Wherein, the terminal device 1610 is configured to: send the first message according to the TA of the first message; send the second message according to the TA of the second message;

The network device 1620 is configured to: receive the first message according to the TA of the first message; receive the second message according to the TA of the second message;

The terminal device 1610 can be used to implement the corresponding functions implemented by the terminal device in the method of the embodiment of the present application, and the composition of the terminal device 1610 can be as shown in the terminal device 1000 in FIG. 10. For the sake of brevity, it will not be omitted here. Repeat.

The network device 1620 can be used to implement the corresponding functions implemented by the network device in the method of the embodiment of the present application, and the composition of the network device 1620 can be as shown in the network device 1200 in FIG. 12, for the sake of brevity, it will not be omitted here. Repeat.

FIG. 17 is a schematic block diagram of a communication system 1700 according to an embodiment of the present application. As shown in FIG. 17, the communication system 1700 includes a terminal device 1710 and a network device 1720.

Wherein, the terminal device 1710 is configured to: send a first message; send a second message, where the second message includes data and a placeholder signal located before the data;

The network device 1720 is configured to: receive a first message; receive a second message, where the second message includes data and a placeholder signal located before the data;

The terminal device 1710 can be used to implement the corresponding functions implemented by the terminal device in the method of the embodiment of the present application, and the composition of the terminal device 1710 can be as shown in the terminal device 1100 in FIG. 11, for the sake of brevity, it will not be omitted here. Repeat.

The network device 1720 can be used to implement the corresponding functions implemented by the network device in the method of the embodiment of the present application, and the composition of the network device 1720 can be as shown in the network device 1300 in FIG. 13. For the sake of brevity, it will not be omitted here. Repeat.

The embodiment of the present application also provides a computer-readable storage medium for storing computer programs. Optionally, the computer-readable storage medium can be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. Repeat. Optionally, the computer-readable storage medium can be applied to the terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the terminal device in each method of the embodiment of the present application. Repeat.

The embodiments of the present application also provide a computer program product, including computer program instructions. Optionally, the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, it is not here. Repeat it again. Optionally, the computer program product can be applied to the terminal device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity, it is not here. Repeat it again.

The embodiment of the present application also provides a computer program. Optionally, the computer program can be applied to the network device in the embodiment of the present application. When the computer program runs on the computer, the computer is caused to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity , I won’t repeat it here. Optionally, the computer program can be applied to the terminal device in the embodiment of the present application. When the computer program runs on the computer, it causes the computer to execute the corresponding process implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity , I won’t repeat it here.

The terms "system" and "network" in the embodiments of the present invention are often used interchangeably herein. The term "and/or" in this article is only an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, exist alone B these three situations. In addition, the character "/" in this text generally indicates that the associated objects before and after are in an "or" relationship.

In the embodiment of the present invention, "B corresponding (corresponding) to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is determined only according to A, and B can also be determined according to A and/or other information.

A person of ordinary skill in the art may be aware that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or may be Integrate into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

A method for message transmission, characterized in that it comprises:

The terminal device sends the first message according to the timing advance TA of the first message;

The terminal device sends the second message according to the TA of the second message, where the first message and the second message are two consecutively transmitted messages, and the TA of the second message and the first message The TA of a message is not equal.
The method according to claim 1, wherein the second message occupies at least part of the guard time GT of the first message.
The method according to claim 1 or 2, wherein the method further comprises:

The terminal device receives first indication information, where the first indication information is used to indicate the TA of the first message and/or the TA of the second message.
The method according to claim 3, wherein the TA of the first message is a preset value, and the first indication information is used to indicate the deviation of the TA of the second message relative to the preset value. Shift.
The method according to claim 3 or 4, wherein the terminal device receiving the first indication information comprises:

The terminal device receives a broadcast message, and the broadcast message includes the first indication information.
The method according to any one of claims 1 to 5, wherein the method is applied to an unlicensed frequency band.
The method according to any one of claims 1 to 6, wherein the time interval between the second message and the non-GT part of the first message is less than a preset value, and the preset value is The minimum time interval for performing LBT after listening first.
The method according to claim 7, wherein the preset value is 16 microseconds.
The method according to any one of claims 1 to 8, wherein the terminal device sending the first message according to the TA of the first message comprises:

The terminal device sends the first message according to the TA of the first message based on the first resource;

The terminal device sending the second message according to the TA of the second message includes:

The terminal device sends the second message according to the TA of the second message based on the second resource;

Wherein, the first resource is a resource configured to transmit the first message, the second resource is a resource configured to transmit the second message, and the second resource is located at an unsigned interval After the first resource.
The method according to any one of claims 1 to 9, wherein the first message is the preamble in the first message of 2-step random access, and the second message is the 2-step random access. The physical uplink shared channel PUSCH in the first message of random access.
The method according to any one of claims 1 to 10, wherein the frequency band occupied by the second message is within the frequency band occupied by the first message.
A method for message transmission, characterized in that it comprises:

The terminal device sends the first message;

The terminal device sends a second message, where the second message includes data and a placeholder signal located before the data, and the placeholder signal occupies at least part of the guard time GT of the first message.
The method according to claim 12, wherein the occupying signal is at least part of the cyclic prefix CP of the data on the first symbol.
The method according to claim 13, wherein another part of the CP is located within the first symbol.
The method according to any one of claims 12 to 14, wherein the method is applied to an unlicensed frequency band.
The method according to any one of claims 12 to 15, wherein the time interval between the second message and the non-GT part of the first message is less than a preset value, and the preset value is The minimum time interval for performing LBT after listening first.
The method according to claim 16, wherein the preset value is 16 microseconds.
The method according to any one of claims 12 to 17, wherein the sending of the first message by the terminal device comprises:

The terminal device sends the first message based on the first resource;

The sending of the second message by the terminal device includes:

The terminal device sends the second message based on the second resource;

Wherein, the first resource is a resource configured to transmit the first message, the second resource is a resource configured to transmit the second message, and the second resource is located at an unsigned interval After the first resource.
The method according to any one of claims 12 to 18, wherein the first message is the preamble in the first message of 2-step random access, and the second message is the 2-step random access. The physical uplink shared channel PUSCH in the first message of random access.
The method according to any one of claims 12 to 19, wherein the frequency band occupied by the second message is within the frequency band occupied by the first message.
The method according to any one of claims 12 to 20, wherein the timing advance TA of the second message is equal to the TA of the first message.
A method for message transmission, characterized in that it comprises:

The network device receives the first message according to the timing advance TA of the first message;

The network device receives the second message according to the TA of the second message, where the first message and the second message are two consecutively transmitted messages, and the TA of the second message and the first message The TA of a message is not equal.
The method according to claim 22, wherein the second message occupies at least part of the guard time GT of the first message.
The method according to claim 22 or 23, wherein the method further comprises:

The network device sends first indication information, where the first indication information is used to indicate the TA of the first message and/or the TA of the second message.
The method according to claim 24, wherein the TA of the first message is a preset value, and the first indication information is used to indicate the deviation of the TA of the second message relative to the preset value. Shift.
The method according to claim 24 or 25, wherein the sending of the first indication information by the network device to the terminal device comprises:

The network device sends a broadcast message, and the broadcast message includes the first indication information.
The method according to any one of claims 22 to 26, wherein the method is applied to an unlicensed frequency band.
The method according to any one of claims 22 to 27, wherein the time interval between the second message and the non-GT part of the first message is less than a preset value, and the preset value is The minimum time interval for performing LBT after listening first.
The method of claim 28, wherein the preset value is 16 microseconds.
The method according to any one of claims 22 to 29, wherein the receiving of the first message by the network device comprises:

The network device receives the first message according to the TA of the first message based on the first resource;

The network device sending the second message according to the TA of the second message includes:

The network device receives the second message according to the TA of the second message based on the second resource;

Wherein, the first resource is a resource configured to transmit the first message, the second resource is a resource configured to transmit the second message, and the second resource is located at an unsigned interval After the first resource.
The method according to any one of claims 22 to 30, wherein the first message is the preamble in the first message of 2-step random access, and the second message is the 2-step random access. The physical uplink shared channel PUSCH in the first message of random access.
The method according to any one of claims 22 to 31, wherein the frequency band occupied by the second message is within the frequency band occupied by the first message.
A method for message transmission, characterized in that it comprises:

The network device receives the first message;

The network device receives a second message, where the second message includes data and a placeholder signal located before the data, and the placeholder signal occupies at least part of the guard time GT of the first message.
The method according to claim 33, wherein the occupant signal is at least part of the cyclic prefix CP of the data on the first symbol.
The method of claim 34, wherein the other part of the CP is located within the first symbol.
The method according to any one of claims 33 to 35, wherein the method is applied to an unlicensed frequency band.
The method according to any one of claims 33 to 36, wherein the time interval between the second message and the non-GT part of the first message is less than a preset value, and the preset value is The minimum time interval for performing LBT after listening first.
The method according to claim 37, wherein the preset value is 16 microseconds.
The method according to any one of claims 33 to 38, wherein the receiving of the first message by the network device comprises:

The network device receives the first message based on the first resource;

The receiving of the second message by the network device includes:

The network device receives the second message based on the second resource;

Wherein, the first resource is a resource configured to transmit the first message, the second resource is a resource configured to transmit the second message, and the second resource is located at an unsigned interval After the first resource.
The method according to any one of claims 33 to 39, wherein the first message is the preamble in the first message of 2-step random access, and the second message is the 2-step random access. The physical uplink shared channel PUSCH in the first message of random access.
The method according to any one of claims 33 to 40, wherein the frequency band occupied by the second message is within the frequency band occupied by the first message.
The method according to any one of claims 33 to 41, wherein the time advance TA of the second message is equal to the TA of the first message.
A terminal device, characterized in that it comprises:

A sending unit, configured to send the first message according to the timing advance TA of the first message;

The terminal equipment unit is further configured to send the second message according to the TA of the second message, where the first message and the second message are two messages that are continuously transmitted, and the second message is TA is not equal to the TA of the first message.
The terminal device according to claim 43, wherein the second message occupies at least part of the guard time GT of the first message.
The terminal device according to claim 43 or 44, wherein the terminal device further comprises:

The receiving unit is configured to receive first indication information, where the first indication information is used to indicate the TA of the first message and/or the TA of the second message.
The terminal device according to claim 45, wherein the TA of the first message is a preset value, and the first indication information is used to indicate the TA of the second message relative to the preset value. Offset.
The terminal device according to claim 45 or 46, wherein the receiving unit is specifically configured to:

Receiving a broadcast message, the broadcast message including the first indication information.
The terminal device according to any one of claims 43 to 47, wherein the terminal device uses an unlicensed frequency band.
The terminal device according to any one of claims 43 to 48, wherein the time interval between the second message and the non-GT part of the first message is less than a preset value, and the preset value The minimum time interval for performing LBT after listening first.
The terminal device according to claim 49, wherein the preset value is 16 microseconds.
The terminal device according to any one of claims 43 to 50, wherein the sending unit is specifically configured to:

Based on the first resource, sending the first message according to the TA of the first message;

Based on the second resource, sending the second message according to the TA of the second message;

Wherein, the first resource is a resource configured to transmit the first message, the second resource is a resource configured to transmit the second message, and the second resource is located at an unsigned interval After the first resource.
The terminal device according to any one of claims 43 to 51, wherein the first message is the preamble in the first message of 2-step random access, and the second message is the 2 The physical uplink shared channel PUSCH in the first message of random access.
The terminal device according to any one of claims 43 to 52, wherein the frequency band occupied by the second message is within the frequency band occupied by the first message.
A terminal device, characterized in that it comprises:

A sending unit for sending the first message;

The sending unit is further configured to send a second message, wherein the second message includes data and a occupancy signal located before the data, and the occupancy signal occupies a portion of the guard time GT of the first message At least partially.
The terminal device according to claim 54, wherein the occupant signal is at least part of the cyclic prefix CP of the data on the first symbol.
The terminal device according to claim 55, wherein another part of the CP is located within the first symbol.
The terminal device according to any one of claims 54 to 56, wherein the terminal device uses an unlicensed frequency band.
The terminal device according to any one of claims 54 to 57, wherein the time interval between the second message and the non-GT part of the first message is less than a preset value, and the preset value The minimum time interval for performing LBT after listening first.
The terminal device according to claim 58, wherein the preset value is 16 microseconds.
The terminal device according to any one of claims 54 to 59, wherein the sending unit is specifically configured to:

Sending the first message based on the first resource;

Based on the second resource, sending the second message;

Wherein, the first resource is a resource configured to transmit the first message, the second resource is a resource configured to transmit the second message, and the second resource is located at an unsigned interval After the first resource.
The terminal device according to any one of claims 54 to 60, wherein the first message is the preamble in the first message of 2-step random access, and the second message is the 2 The physical uplink shared channel PUSCH in the first message of random access.
The terminal device according to any one of claims 54 to 61, wherein the frequency band occupied by the second message is within the frequency band occupied by the first message.
The terminal device according to any one of claims 54 to 62, wherein the timing advance TA of the second message is equal to the TA of the first message.
A network device, characterized by comprising:

A receiving unit, configured to receive the first message according to the timing advance TA of the first message;

The receiving unit is further configured to receive the second message according to the TA of the second message, wherein the first message and the second message are two consecutively transmitted messages, and the TA of the second message It is not equal to the TA of the first message.
The network device according to claim 64, wherein the second message occupies at least part of the guard time GT of the first message.
The network device according to claim 64 or 65, wherein the network device further comprises:

The sending unit is configured to send first indication information, where the first indication information is used to indicate the TA of the first message and/or the TA of the second message.
The network device according to claim 66, wherein the TA of the first message is a preset value, and the first indication information is used to indicate the TA of the second message relative to the preset value. Offset.
The network device according to claim 66 or 67, wherein the sending unit is specifically configured to:

Sending a broadcast message, the broadcast message including the first indication information.
The network device according to any one of claims 64 to 68, wherein the network device uses an unlicensed frequency band.
The network device according to any one of claims 64 to 69, wherein the time interval between the second message and the non-GT part of the first message is less than a preset value, and the preset value The minimum time interval for performing LBT after listening first.
The network device according to claim 70, wherein the preset value is 16 microseconds.
The network device according to any one of claims 64 to 71, wherein the receiving unit is specifically configured to:

Receiving the first message according to the TA of the first message based on the first resource;

Receiving the second message according to the TA of the second message based on the second resource;

Wherein, the first resource is a resource configured to transmit the first message, the second resource is a resource configured to transmit the second message, and the second resource is located at an unsigned interval After the first resource.
The network device according to any one of claims 64 to 72, wherein the first message is the preamble in the first message of 2-step random access, and the second message is the 2 The physical uplink shared channel PUSCH in the first message of random access.
The network device according to any one of claims 64 to 73, wherein the frequency band occupied by the second message is within the frequency band occupied by the first message.
A network device, characterized by comprising:

A receiving unit for receiving the first message;

The receiving unit is further configured to receive a second message, wherein the second message includes data and a occupancy signal located before the data, and the occupancy signal occupies within the guard time GT of the first message At least partially.
The network device according to claim 75, wherein the occupying signal is at least part of the cyclic prefix CP of the data on the first symbol.
The network device according to claim 76, wherein another part of the CP is located within the first symbol.
The network device according to claim 75 or 76, wherein the network device uses an unlicensed frequency band.
The network device according to any one of claims 75 to 78, wherein the time interval between the second message and the non-GT part of the first message is less than a preset value, and the preset value The minimum time interval for performing LBT after listening first.
The network device of claim 79, wherein the preset value is 16 microseconds.
The network device according to any one of claims 75 to 80, wherein the receiving unit is specifically configured to:

Receiving the first message based on the first resource;

Receiving the second message based on the second resource;

Wherein, the first resource is a resource configured to transmit the first message, the second resource is a resource configured to transmit the second message, and the second resource is located at an unsigned interval After the first resource.
The network device according to any one of claims 75 to 81, wherein the first message is the preamble in the first message of 2-step random access, and the second message is the 2 The physical uplink shared channel PUSCH in the first message of random access.
The network device according to any one of claims 75 to 82, wherein the frequency band occupied by the second message is within the frequency band occupied by the first message.
The network device according to any one of claims 75 to 83, wherein the timing advance TA of the second message is equal to the TA of the first message.
A terminal device, characterized in that the terminal device includes a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute claim 1. The method of any one of to 11 or the method of any one of claims 12 to 21 is performed.
A network device, wherein the network device includes a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute claim 22 The method of any one of to 32 or the method of any one of claims 33 to 42 is performed.
A chip, characterized in that the chip includes a processor, and the processor is used to call and run a computer program from a memory, so that a device installed with the chip executes the method described in any one of claims 1 to 11 Method or execution of the method of any one of claims 12-21.
A chip, characterized in that the chip includes a processor, and the processor is used to call and run a computer program from a memory, so that the device installed with the chip executes any one of claims 22 to 32 Method or execution of the method of any one of claims 33 to 42.
A computer-readable storage medium, characterized in that it is used to store a computer program that enables a computer to execute the method described in any one of claims 1 to 11 or execute the method described in any one of claims 12 to 21 The method described.
A computer-readable storage medium, characterized in that it is used to store a computer program that enables a computer to execute the method described in any one of claims 22 to 32 or execute the method described in any one of claims 33 to 42 The method described.
A computer program product, characterized by comprising computer program instructions that cause a computer to execute the method of any one of claims 1 to 11 or execute the method of any one of claims 12 to 21 method.
A computer program product, characterized by comprising computer program instructions that cause a computer to execute the method according to any one of claims 22 to 32 or execute the method according to any one of claims 33 to 42 method.
A computer program, characterized in that the computer program causes a computer to execute the method according to any one of claims 1 to 11 or execute the method according to any one of claims 12 to 21.
A computer program, wherein the computer program causes a computer to execute the method according to any one of claims 22 to 32 or execute the method according to any one of claims 33 to 41.
A communication system, characterized by comprising the terminal device according to any one of claims 43 to 53, and the network device according to any one of claims 64 to 74.
A communication system, characterized by comprising the terminal device according to any one of claims 54 to 63 and the network device according to any one of claims 75 to 84.