CN113810979A

CN113810979A - Access method, device, electronic equipment and readable storage medium

Info

Publication number: CN113810979A
Application number: CN202010784789.XA
Authority: CN
Inventors: 刘云; 薛丽霞
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-06-13
Filing date: 2020-08-06
Publication date: 2021-12-17
Anticipated expiration: 2040-08-06
Also published as: CN113810979B

Abstract

The embodiment of the application provides an access method, an access device, electronic equipment and a readable storage medium, wherein the method comprises the following steps: the network equipment sends first configuration information on a first downlink carrier, the first configuration information is used for indicating a first uplink resource, the network equipment receives a first signal or first information from the terminal equipment on the first uplink resource, and when the terminal equipment is determined to be accessed to the network equipment on the first downlink carrier according to the first signal or the first information, the network equipment sends a downlink signal on the first downlink carrier. In the process of random access of the terminal device, the network device may configure a first uplink resource for the terminal device to feed back a downlink carrier accessed to the network device, so that the terminal device feeds back the downlink carrier accessed to the network device on the first uplink resource, thereby achieving the purpose that the network device can distinguish the downlink carrier accessed to the network device by the terminal device, and further the network device may send a downlink signal on the corresponding downlink carrier, so that the terminal device can receive the downlink signal.

Description

Access method, device, electronic equipment and readable storage medium

Technical Field

The present disclosure relates to communications technologies, and in particular, to an access method, an access apparatus, an electronic device, and a readable storage medium.

Background

In a new radio access (NR) network or a fifth generation mobile communication (5G) network, in order to improve coverage of an uplink signal of a cell, particularly, a high frequency cell, a concept of a Supplemental Uplink (SUL) is proposed.

Currently, for a Time Division Duplex (TDD) system, a terminal device is configured with a carrier on which the terminal device performs uplink and downlink communication in a time division manner. The NR network or the 5G network supports configuring another uplink carrier for the terminal device, where the uplink carrier is the SUL. When the terminal equipment is at the edge of the cell, uplink communication can be performed through the SUL, and then uplink coverage of the UE is improved. However, the carrier to which the SUL belongs may also be configured as a carrier for other terminal devices to perform uplink and downlink communication. On the carrier, the original uplink communication of the carrier needs to be performed, and the SUL needs to be implemented, so that the uplink resource of the carrier occupies a large amount.

In order to save the occupation of the uplink resource of the carrier to which the SUL belongs, the resource originally occupied by the uplink communication on the carrier and the resource occupied by the SUL may be configured together, that is, the same uplink resource on the carrier may perform both the original uplink communication and the SUL. However, in this scenario, the network device cannot distinguish which terminal device the data on the uplink resource comes from.

Disclosure of Invention

The embodiment of the application provides an access method, an access device, electronic equipment and a readable storage medium, wherein network equipment can distinguish downlink carriers of terminal equipment accessed to the network equipment.

In a first aspect, an embodiment of the present application provides an access method, which may be applied to a network device and may also be applied to a chip in the network device. The method is described below by taking an application to a network device as an example, in the method, a network device sends first configuration information on a first downlink carrier, where the first configuration information is used to indicate a first uplink resource, the network device receives a first signal or first information from a terminal device on the first uplink resource, and the network device determines, according to the first signal or first information, whether the terminal device accesses the network device on the first downlink carrier; and when the terminal equipment accesses the network equipment on the first downlink carrier, the network equipment sends a downlink signal on the first downlink carrier. The first uplink resource is located in a second uplink carrier, the second uplink carrier is a supplemental uplink SUL, and a frequency point of a first uplink carrier corresponding to the first downlink carrier is different from a frequency point of the second uplink carrier.

It should be understood that, in the foregoing technical solution, in the process of random access by the terminal device, the network device may configure, for the terminal device, the first uplink resource for feeding back the downlink carrier accessed to the network device, so that the terminal device feeds back the downlink carrier accessed to the network device on the first uplink resource, and then the network device can distinguish the downlink carrier accessed to the network device by the terminal device, and then the network device may send the downlink signal on the corresponding downlink carrier, so that the terminal device can receive the downlink signal.

In the above method, the network device may send the first configuration information on the first downlink carrier alone, but in order to save signaling interaction between the terminal device and the network device in the process of random access, the network device may carry the first configuration information in a current random access message. The access method of the present application is explained in the following three possible implementation manners. It should be understood that the network device may send fourth configuration information on the second downlink carrier, where the fourth configuration information is used to indicate a fourth uplink resource on the second uplink carrier. And the fourth uplink resource is used for carrying the preamble sequence. In this embodiment, in order to save uplink resources on the second uplink carrier, the network device may configure the same time-frequency code resource for the SUL and the NUL on the second uplink carrier, that is, the uplink resource configured by the network device for the SUL and carrying the preamble sequence and the fourth uplink resource may occupy the same time-frequency code resource on the second uplink carrier.

A first possible implementation: in the 4-step RACH scenario, a network device may send a system broadcast message on a first downlink carrier. The system broadcast message includes first configuration information and second configuration information. The first configuration information is used for indicating a first uplink resource of a downlink carrier fed back and accessed by the terminal equipment, and the second configuration information indicates a second uplink resource on a second uplink carrier, wherein the second uplink resource is used for bearing a leader sequence. Because the second uplink resource and the fourth uplink resource occupy the same time-frequency code resource on the second uplink carrier. That is to say, in the current technical solution of 4-step RACH, the network device not only configures the second uplink resource carrying the preamble sequence for the terminal device, but also configures the first uplink resource feeding back the accessed downlink carrier for the terminal device. In this way, the terminal device may send the first signal or the first information on the first uplink resource, and send the preamble sequence on the second uplink resource, so that the network device obtains the downlink carrier of the terminal device accessing the network device. It should be understood that the first configuration information and the second configuration information may be included in one configuration information, and for example, the SIB in the system broadcast message in the embodiment of the present application may carry the configuration information.

In this implementation, the first uplink resource may be a PRACH resource or a PUSCH resource on the second uplink carrier. Because the information carried by the PRACH resource is limited, when the first uplink resource is the PRACH resource, the terminal device may send a first signal, which may be a sequence, on the first uplink resource. It should be understood that the preamble sequence and the sequence have a correspondence, which may be carried in a system broadcast message. Wherein one preamble sequence of the second uplink resource bearer corresponds to one sequence of the first uplink resource bearer, or a plurality of preamble sequences of the second uplink resource bearer correspond to one sequence of the first uplink resource bearer. When the first uplink resource is a PUSCH resource, the PUSCH resource may carry more information than the PRACH resource, and therefore the terminal device may send the first information on the first uplink resource.

When receiving the preamble sequence, the network device may detect whether there is a first signal from the terminal device on a first uplink resource corresponding to a second uplink resource. If the network device detects that the first uplink resource carries the first signal, it may be determined that the terminal device accesses the network device in the first downlink carrier.

A second possible implementation: in the 4-step RACH scenario, the network device may carry the first configuration information in the Msg2 sent to the terminal device. In this manner, the network device sends the second configuration information on the first downlink carrier to configure the second uplink resource carrying the preamble sequence, and the terminal device may send Msg1 on the second uplink resource to the network device, where the Msg1 carries the preamble sequence. In this embodiment of the present application, the second uplink resource and the fourth uplink resource occupy the same time-frequency code resource on the second uplink carrier, so after the network device receives the preamble sequence on the second uplink resource, it cannot distinguish whether the downlink carrier of the terminal device accessing the network device is the first downlink carrier or the second downlink carrier. In order to ensure that the terminal device can receive the uplink resource carrying the message three Msg3 configured for the terminal device by the network device, so that the terminal device can smoothly access the network device, in this embodiment of the present application, the network device may send Msg2 on both the first downlink carrier and the second downlink carrier.

In this implementation, the first configuration information may be carried in Msg 2. The first configuration information may be an uplink resource for carrying service data of the terminal device, and if the service data is Msg3, the uplink resource may be a PUSCH resource on a second uplink carrier. Since the PUSCH resource may carry more information than the PRACH resource, the terminal device may send first information on the first uplink resource, where the first information is used to instruct the terminal device to access the network device on the first downlink carrier. Or, in addition to configuring, by the network device, resources for carrying the preamble sequence and the service data for the terminal device, the network device may also configure, by itself, uplink resources for carrying the first signal or the first information for the terminal device, where the uplink resources may be different from the resources for carrying the preamble sequence and the service data.

When the network device receives the Msg3 on the first uplink resource, it may detect whether a corresponding bit on the first uplink resource carries the first information. If it is detected that the corresponding bit on the first uplink resource carries the first information, it may be determined that the terminal device accesses the network device in the first downlink carrier

A third possible implementation: in the 2-step RACH scenario, a network device may send a system broadcast message on a first downlink carrier. The system broadcast message includes first configuration information and third configuration information. The first configuration information and the third configuration information may be configured in one configuration information, or it may be said that the system broadcast message includes the configuration information, and the configuration information includes the first configuration information and the third configuration information. The configuration information may be carried on the SIB of the system broadcast message. Different from the first method, in the 2-step RACH, the terminal device may carry the preamble sequence and the service data in one message (MsgA), so the configuration information in the system broadcast message in the embodiment of the present application needs to configure the uplink resource carrying the service data and the uplink resource carrying the preamble sequence for the terminal device. Correspondingly, the third configuration information in this embodiment is used to indicate a third uplink resource on the second uplink carrier, where the third uplink resource is used to carry the preamble sequence.

The first uplink resource in this embodiment is used to carry uplink resources of service data of the terminal device, where the first uplink resource is also used to carry first information. In the embodiment of the application, the terminal device may send the service data on the PUSCH resource, and may also carry the first information on the PUSCH resource. Optionally, in this embodiment of the present application, the network device may allocate bits carrying the first information on the PUSCH resource. The preamble sequence carried by the third configuration information and the PUSCH resource indicated by the first configuration information have a corresponding relationship, and the system broadcast message may carry the corresponding relationship.

It should be understood that, after receiving the preamble sequence on the third uplink resource, the network device may detect the first information on the PUSCH resource corresponding to the preamble sequence. If the PUSCH resource carries the first information, it may be determined that the terminal device accesses the network device on the first downlink carrier, that is, it may be determined that the terminal device accesses the network device by the SUL.

In the process of accessing the network device by the terminal device, the network device may send a message to the terminal device, where the message carries the first configuration information. The embodiment of the present application further provides another access method, where a network device may pre-configure a code domain resource set of a preamble sequence of a terminal device accessing a network device through a first downlink carrier, and when the terminal device carries the preamble sequence in the code domain resource set, the network device may determine that the terminal device accesses the network device through the first downlink carrier. In this implementation manner, the resource configured by the network device for the SUL and bearing the preamble sequence may occupy a different time-frequency resource on the second uplink carrier from the fourth uplink resource, so that the network device may determine whether the terminal device accesses the network device by the SUL according to the time domain, the frequency domain, and the code domain of the resource bearing the preamble sequence. In this embodiment, in order to save the occupation of the uplink resource on the second uplink carrier, the resource configured by the network device for the SUL and bearing the preamble sequence may occupy the same time-frequency resource as the fourth uplink resource on the second uplink carrier, and then the network device may determine whether the terminal device accesses the network device by the SUL using the code domain resource bearing the preamble sequence. The access method is explained below from two possible implementations:

a first possible implementation: in a 4-step RACH scenario, a network device sends a system broadcast message on a first downlink carrier, where the system broadcast message includes first configuration information, and the first configuration information is specifically used to indicate a code domain resource set of a first uplink resource. And the leader sequence in the code domain resource set is used for indicating the terminal equipment to access the network equipment in the first downlink carrier. The terminal device may determine to send Msg1 in the corresponding code domain resource set according to the downlink carrier wave of the access network device, that is, send the preamble sequence in the corresponding code domain resource set. It should be understood that, in the embodiment of the present application, the first uplink resource is a PRACH resource that carries a preamble sequence, and the preamble sequence may be the first signal.

In this implementation, the network device may determine whether the terminal device accesses the network device on the first downlink carrier according to the preamble sequence. In this embodiment, the network device may determine whether the terminal device accesses the network device in the first downlink carrier according to a code domain resource set in which a code domain resource carrying a preamble sequence is located. And the leader sequence positioned in the code domain resource set indicates the terminal equipment to access the network equipment in the first downlink carrier.

A second possible implementation: in a 2-step RACH scenario, a network device sends a system broadcast message on a first downlink carrier, where the system broadcast message includes first configuration information and third configuration information, and the first configuration information is used to indicate a code domain resource set corresponding to a first uplink resource. Similar to the above technical solution, the terminal device may determine to send Msg1 in the corresponding code domain resource set according to the downlink carrier of the access network device, that is, send the preamble sequence in the corresponding code domain resource set. It should be understood that, in the embodiment of the present application, the first uplink resource is a PRACH resource that carries a preamble sequence, and the preamble sequence may be the first signal. In this implementation, the network device may determine whether the terminal device accesses the network device on the first downlink carrier according to the preamble sequence. In this embodiment, the network device may determine whether the terminal device accesses the network device in the first downlink carrier according to a code domain resource set in which a code domain resource carrying a preamble sequence is located. And the leader sequence positioned in the code domain resource set indicates the terminal equipment to access the network equipment in the first downlink carrier.

In a possible design, the second uplink carrier is also configured with uplink resources corresponding to SULs of other frequency points. For example, the network device may transmit the fifth configuration information on the third downlink carrier. The fifth configuration information is used to indicate a fifth uplink resource, where the fifth uplink resource is located in the second uplink carrier and is used to carry the first signal or the first information. And the frequency point of the third uplink carrier corresponding to the third downlink carrier is different from that of the first uplink carrier.

The first uplink resource table and the fifth uplink resource may be different, and the network device may determine, according to the uplink resource carrying the first signal or the first information, that the downlink carrier of the terminal device that sends the first signal or the first information, which is accessed to the network device, is the first downlink carrier or the third downlink carrier. In order to save the occupation of the uplink resource of the second uplink carrier, the first uplink resource table and the fifth uplink resource may be the same, and in this case, the first signal or the first information may indicate the first downlink carrier or the third downlink carrier accessed to the network device, so that the network device may distinguish whether the downlink carrier corresponding to the preamble sequence from the same uplink resource is the first downlink carrier or the third downlink carrier, and further, the network device may communicate with the terminal device by using the corresponding downlink carrier.

In a second aspect, an embodiment of the present application provides an access method, where the method includes: the method comprises the steps that terminal equipment receives first configuration information on a first downlink carrier, wherein the first configuration information is used for indicating a first uplink resource, the first uplink resource is located on a second uplink carrier, the second uplink carrier is a supplementary uplink SUL, and the frequency point of the first uplink carrier corresponding to the first downlink carrier is different from that of the second uplink carrier; and the terminal equipment sends a first signal or first information on the first uplink resource, wherein the first signal or the first information is used for indicating the terminal equipment to access the network equipment on the first downlink carrier.

Based on the above technical solution, in the process of random access of the terminal device, the network device may configure, for the terminal device, a first uplink resource for feeding back a downlink carrier accessed to the network device, and correspondingly, the terminal device may feed back the downlink carrier accessed to the network device on the first uplink resource, and then the network device may send a downlink signal on the downlink carrier corresponding to the terminal device, so that the terminal device can receive the downlink signal.

In a possible implementation manner, the first signal is a sequence, and the first uplink resource is used to carry the sequence, where the method further includes: receiving second configuration information on the first downlink carrier, where the second configuration information is used to indicate a second uplink resource on the second uplink carrier, and the second uplink resource is used to carry a preamble sequence, where one preamble sequence carried by the second uplink resource corresponds to one sequence carried by the first uplink resource, or multiple preamble sequences carried by the second uplink resource correspond to one sequence carried by the first uplink resource; the sending the first signal or the first information on the first uplink resource includes: and sending a leader sequence on the second uplink resource, and sending the sequence corresponding to the leader sequence on the first uplink resource.

In a possible implementation manner, the first uplink resource is an uplink resource for carrying service data of the terminal device, and the first uplink resource is used for carrying the first information; the method further comprises the following steps: receiving third configuration information on the first downlink carrier, where the third configuration information is used to indicate a third uplink resource on the second uplink carrier, the third uplink resource is used to carry a preamble sequence, and the first configuration information and the third configuration information are included in one configuration information.

In a possible implementation manner, the first uplink resource is an uplink resource for carrying service data of the terminal device, the first uplink resource is used for carrying the first information, and the service data is a message three Msg 3.

In a possible implementation manner, the indicating, by the first configuration information, the first uplink resource includes: the first configuration information indicates a code domain resource set corresponding to the first uplink resource, where the first uplink resource is used to carry the first signal, and the first signal is a preamble sequence, where the preamble sequence in the code domain resource set is used to indicate that the terminal device accesses the network device on the first downlink carrier.

In a third aspect, an embodiment of the present application provides an access apparatus, where the access apparatus may be a network device or a chip or a system on a chip in the network device, and the access apparatus includes: the device comprises a communication module and a processing module. The communication module is configured to send first configuration information on a first downlink carrier, and receive a first signal or first information from a terminal device on a first uplink resource, where the first configuration information is used to indicate a first uplink resource, the first uplink resource is located on a second uplink carrier, the second uplink carrier is a supplemental uplink SUL, and frequency points of the first uplink carrier and the second uplink carrier corresponding to the first downlink carrier are different; a processing module, configured to determine whether the terminal device accesses the network device on the first downlink carrier according to the first signal or the first information; the communication module is further configured to send a downlink signal on the first downlink carrier when the terminal device accesses the network device on the first downlink carrier.

In one possible design, the first signal is a sequence, and the first uplink resource is used for carrying the sequence. A communication module, configured to send second configuration information on the first downlink carrier, where the second configuration information is used to indicate a second uplink resource on the second uplink carrier, and the second uplink resource is used to carry a preamble sequence, where one preamble sequence carried by the second uplink resource corresponds to one sequence carried by the first uplink resource, or multiple preamble sequences carried by the second uplink resource correspond to one sequence carried by the first uplink resource.

In a possible design, the first uplink resource is an uplink resource for carrying service data of the terminal device, where the first uplink resource is used to carry the first information, and the first information is used to indicate that the terminal device accesses the network device on the first downlink carrier.

The communication module is further configured to send third configuration information on the first downlink carrier, where the third configuration information is used to indicate a third uplink resource on the second uplink carrier, the third uplink resource is used to carry a preamble sequence, and the first configuration information and the third configuration information are included in one configuration information; or,

the communication module is further configured to send the first configuration information on a second downlink carrier corresponding to the second uplink carrier, where the service data is a message three Msg 3.

In a possible design, the communication module is further configured to send fourth configuration information on a second downlink carrier corresponding to the second uplink carrier, where the fourth configuration information is used to indicate a fourth uplink resource on the second uplink carrier, and the fourth uplink resource is used to carry a preamble sequence.

In one possible design, the second uplink resource and the fourth uplink resource occupy the same time-frequency code resource on the second uplink carrier; or the third uplink resource and the fourth uplink resource occupy the same time-frequency code resource on the second uplink carrier.

In one possible design, the first configuration information indicates a first uplink resource, including: the first configuration information indicates a code domain resource set corresponding to the first uplink resource, where the first uplink resource is used to carry the first signal, and the first signal is a preamble sequence; wherein, the preamble sequence in the code domain resource set is used to instruct the terminal device to access the network device on the first downlink carrier.

In a possible design, the first uplink resource and the fourth uplink resource occupy the same time-frequency resource on the second uplink carrier.

In a possible design, the first uplink resource and the fourth uplink resource occupy different time-frequency resources on the second uplink carrier.

In a possible design, the communication module is further configured to send fifth configuration information on a third downlink carrier, where the fifth configuration information is used to indicate a fifth uplink resource, the fifth uplink resource is located in the second uplink carrier, the fifth uplink resource is used to carry the first signal or the first information, and the third downlink carrier is different from the first downlink carrier in frequency point, where the first signal or the first information indicates that the terminal device accesses the network device on the first downlink carrier or the third downlink carrier.

In a fourth aspect, an embodiment of the present application provides an access apparatus, where the access apparatus may be a terminal device or a chip or a system on a chip in the terminal device, and the access apparatus includes: the communication device comprises a first communication module and a second communication module. The first communication module is configured to receive first configuration information on a first downlink carrier, where the first configuration information is used to indicate a first uplink resource, the first uplink resource is located on a second uplink carrier, the second uplink carrier is a supplemental uplink SUL, and a frequency point of the first uplink carrier and a frequency point of the second uplink carrier corresponding to the first downlink carrier are different; a second communication module, configured to send a first signal or first information on the first uplink resource, where the first signal or the first information is used to indicate that the terminal device accesses the network device on the first downlink carrier.

In one possible design, the first signal is a sequence, and the first uplink resource is used for carrying the sequence.

The first communication module is further configured to receive second configuration information on the first downlink carrier, where the second configuration information is used to indicate a second uplink resource on the second uplink carrier, and the second uplink resource is used to carry a preamble sequence, where one preamble sequence carried by the second uplink resource corresponds to one sequence carried by the first uplink resource, or multiple preamble sequences carried by the second uplink resource correspond to one sequence carried by the first uplink resource.

And a second communication module, configured to send a preamble sequence on the second uplink resource, and send the sequence corresponding to the preamble sequence on the first uplink resource.

In a possible design, the first uplink resource is an uplink resource for carrying service data of the terminal device, and the first uplink resource is used for carrying the first information. The first communication module is further configured to receive third configuration information on the first downlink carrier, where the third configuration information is used to indicate a third uplink resource on the second uplink carrier, the third uplink resource is used to carry a preamble sequence, and the first configuration information and the third configuration information are included in one configuration information.

In a possible design, the first uplink resource is an uplink resource for carrying service data of the terminal device, the first uplink resource is used for carrying the first information, and the service data is a message three Msg 3.

In one possible design, the first configuration information indicates a first uplink resource, including: the first configuration information indicates a code domain resource set corresponding to the first uplink resource, where the first uplink resource is used to carry the first signal, and the first signal is a preamble sequence, where the preamble sequence in the code domain resource set is used to indicate that the terminal device accesses the network device on the first downlink carrier.

In a fifth aspect, an embodiment of the present application provides an electronic device, which may be the network device of the first aspect or the terminal device of the second aspect, where the electronic device includes: a processor, a memory, a transceiver; the transceiver is coupled to the processor, and the processor controls transceiving action of the transceiver;

wherein the memory is to store computer executable program code, the program code comprising instructions; the instructions, when executed by the processor, cause the communication device to perform an access method as claimed in the first or second aspect.

In a sixth aspect, embodiments of the present application provide a computer-readable storage medium, which stores instructions that, when executed on a computer, can cause the computer to perform the method according to any one of the designs of the first aspect to the second aspect.

In a seventh aspect, embodiments of the present application provide a computer program product containing instructions, which when run on a computer, enable the computer to perform the method according to any one of the first to second aspects.

In an eighth aspect, an embodiment of the present application provides a chip, where the chip includes a processor, and when the processor executes instructions, the processor is configured to perform the method according to any one of the designs of the first aspect to the second aspect. The instructions may come from memory internal to the chip or from memory external to the chip. Optionally, the chip further comprises an input-output circuit.

In a ninth aspect, an embodiment of the present application provides a communication system, which includes a network device and a terminal device. Wherein the network device is configured to perform the access method according to the first aspect. The terminal device is configured to perform the access method according to the second aspect.

For technical effects brought by the method of the first aspect, reference may be made to the technical effects brought by the second aspect to the ninth aspect, which are not described herein again.

Drawings

Fig. 1 is a schematic diagram of a system architecture to which an access method provided in the embodiment of the present application is applicable;

fig. 2 is a schematic diagram of carrier allocation;

fig. 3 is a schematic diagram of another carrier allocation;

FIG. 4 is a flow chart of 4-step RACH;

FIG. 5 is a flow chart of 2-step RACH;

fig. 6 is a flowchart illustrating an embodiment of an access method according to an embodiment of the present application;

fig. 7 is a flowchart illustrating an access method according to another embodiment of the present application;

FIG. 8 is a schematic diagram of resource allocation provided in an embodiment of the present application;

fig. 9 is a schematic diagram of a preamble sequence and a sequence mapping provided in an embodiment of the present application;

fig. 10 is a flowchart illustrating an access method according to another embodiment of the present application;

fig. 11 is a flowchart illustrating an access method according to another embodiment of the present application;

fig. 12 is a flowchart illustrating an access method according to another embodiment of the present application;

fig. 13 is a flowchart illustrating an access method according to another embodiment of the present application;

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

fig. 15 is a schematic structural diagram of another access device according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

Fig. 1 is a schematic diagram of a system architecture to which an access method provided in the embodiment of the present application is applicable. As shown in fig. 1, the system architecture may include a network device and a terminal device. Fig. 1 illustrates an example of a system architecture including a network device and a terminal device, where the network device may be a device that communicates with the terminal device (or referred to as a communication terminal or a terminal). The network device can configure an uplink carrier and a downlink carrier for the terminal device, and frequency points corresponding to the uplink carrier and the downlink carrier can be the same, and for example, the frequency points can be both 3.5 GHz. The network device may send a downlink signal to the terminal device on a downlink carrier, and the terminal device may send an uplink signal to the network device on an uplink carrier, so as to implement communication between the network device and the terminal device. Since the transmission power of the signal of the terminal device is low, the path loss of signal transmission in a cell, particularly a high-frequency cell, is large, so that the network device cannot receive the uplink signal of the terminal device in the cell edge area. However, because the transmission power of the signal of the network device is high, the terminal device in the area smaller than the edge area can receive the downlink signal from the network device, and thus the cell has the problem of asymmetric uplink and downlink coverage.

In order to improve the coverage of uplink signals of a cell, a Supplementary Uplink (SUL) concept is proposed. The terminal device in the area smaller than the edge area can send an uplink signal to the network device on the SUL, and the network device receives the uplink signal on the SUL to make up for the problem of poor uplink coverage of the cell. For example, as shown in fig. 1, the frequency point corresponding to the uplink and downlink carriers configured by the network device for the terminal device is 3.5GHz, and the frequency point of the carrier to which the SUL belongs may be 2.6 GHz. The network equipment sends downlink signals to the terminal equipment on the downlink carrier wave with the frequency point of 3.5GHz, and the terminal equipment can send uplink signals to the network equipment on the uplink carrier wave with the frequency point of 3.5GHz or 2.6 GHz. For example, the terminal device located in the cell center region may send the uplink signal to the network device on the uplink carrier with the frequency point of 3.5GHz, and the terminal device located in the cell edge region may send the uplink signal to the network device on the uplink carrier with the frequency point of 2.6 GHz. It should be understood that an uplink carrier may also be referred to as an uplink (NUL) or uplink carrier, and a downlink carrier may also be referred to as a downlink (NDL) or downlink carrier.

The carrier to which the SUL belongs is configured with access resources (uplink resources) corresponding to the downlink of the frequency point at which the carrier is located, so that the carrier to which the SUL belongs is configured with uplink resources of the frequency point corresponding to the carrier and also configured with uplink resources of the frequency point corresponding to the SUL, which results in limitation of the uplink resources of the carrier. Fig. 2 is a schematic diagram of carrier allocation, and fig. 2 illustrates resource allocation of a carrier in a Time Division Duplex (TDD) system as an example. As shown in fig. 2, carriers with a frequency point of 3.5GHz include uplink carriers and downlink carriers, where the downlink carriers in the embodiment of the present application are represented by non-padding, and the uplink carriers are represented by diagonal shading. The SUL for a carrier with a frequency point of 3.5GHz is located at a frequency point of 2.6GHz, filled with vertical bar shading as shown in FIG. 2. The carrier with the frequency point of 2.6GHz is configured with both the access resource corresponding to the downlink with the frequency point of 2.6GHz and the uplink resource corresponding to the downlink with the frequency point of 3.5GHz (resource occupied by SUL), which results in limitation of the uplink resource of the carrier with the frequency point of 2.6 GHz.

In order to save the occupation of the uplink resources of the carrier to which the SUL belongs, in the embodiment of the present application, the resources occupied by the SUL and the resources occupied by the NUL on the carrier to which the SUL belongs may be configured together. For example, the SUL and the NUL of the carrier are realized by the same uplink resource of the uplink carrier with the frequency point of 2.6 GHz. It should be understood that, in the embodiment of the present application, the network device may configure together the resource that carries the preamble sequence when accessing the network device on the SUL and the resource that carries the preamble sequence when accessing the network device on the NUL. That is, the PRACH resource configured by the network device when accessing the network device on the SUL is the same as the PRACH resource configured by the network device when accessing the network device on the NUL. Fig. 3 is a schematic diagram of another carrier allocation. As shown in fig. 3, the same uplink resource of the uplink carrier with the frequency point of 2.6GHz can implement SUL and NUL on the carrier, and the same uplink resource is filled with black shading.

In this scenario, although the occupation of the uplink resource of the carrier to which the SUL belongs is saved, when the network device receives an uplink signal from the same uplink resource, the network device cannot distinguish whether the frequency point of the downlink resource corresponding to the uplink resource carrying the uplink signal is 3.5GHz or 2.6 GHz. Therefore, the network device cannot determine which downlink carrier is used to transmit the downlink signal, that is, the network device cannot determine whether the downlink carrier with the frequency point of 3.5GHz is used to transmit the downlink signal or the downlink carrier with the frequency point of 2.6GHz is used to transmit the downlink signal. If the network device uses the wrong downlink carrier to send the downlink signal, the terminal device cannot receive the downlink signal from the network device, and further a communication error is caused.

In order to solve the above problem, an embodiment of the present application provides an access method, where a terminal device may send a downlink carrier of the terminal device accessing a network device to the network device in a process of accessing the network device. Therefore, the network device can distinguish the downlink carrier corresponding to the uplink signal on the same uplink resource, and then the network device can send the downlink signal to the terminal device by using the downlink carrier, so as to achieve the purpose of ensuring that the terminal device can receive the downlink signal. It should be understood that the access method provided in the embodiment of the present application may be applied to a TDD system, and may also be applied to a system in which the SUL of one cell and the uplink of another cell occupy the same uplink resource.

It should be understood that, in the embodiment of the present application, the system shown in fig. 1 may be a global system for mobile communications (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a long term evolution (long term evolution, LTE) system, a frequency division duplex (frequency division duplex, FDD) system, a Time Division Duplex (TDD) system, a long term evolution (long term evolution, LTE) system, a New wireless (New, NR) system, an LTE (long term evolution, unlicensed-Radio) system, an LTE (LTE-unlicensed, NR) system, an LTE-unlicensed-Radio) system, an LTE-unlicensed-Radio (NR) system, an LTE-unlicensed-Radio (LTE-unlicensed-Radio) system, an LTE (New, or unlicensed-Radio) system on an NR system, and an LTE-unlicensed-Radio (non-Radio) system on an NR system, Universal Mobile Telecommunications System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, Wireless Local Area Networks (WLANs), wireless fidelity (WiFi), next generation communication systems, other communication systems, and the like. Herein, the NR system may also be referred to as a 5G system or a 5G network.

The Network device in this embodiment may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, a Base Station (NodeB, NB) in a WCDMA system, an evolved Node B (eNB or eNodeB) in an LTE system, or a wireless controller in a Cloud Radio Access Network (CRAN), or may be a Mobile switching center, a relay Station, an Access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a device on a Network side in a 5G Network, or a Network device in an evolved Public Land Mobile Network (PLMN), and the like. When the communication system is AN NR system, the network device may be a (radio access network (R) AN device in the NR system, and the (R) AN device in the NR system may be: non-3 GPP access networks such as Access Points (APs) of a WiFi network, next generation base stations (which may be collectively referred to as a new generation radio access network node (NG-RAN node), where the next generation base stations include a new air interface base station (NR node b, gNB), a new generation evolved base station (NG-eNB), a Central Unit (CU), a Distributed Unit (DU), a split-form gNB, and the like), new radio controllers (NR controllers), radio remote modules, micro base stations, relays (relays), transceiving points (TRPs), Transmission Points (TPs), or other nodes. The embodiment of the present application does not limit the specific technology and the specific device form adopted by the network device. For convenience of description, in all embodiments of the present application, the above-mentioned apparatus for providing a wireless communication function for a terminal device is collectively referred to as a network device.

In the embodiment of the present application, the terminal device may be any terminal, for example, the terminal device may be a user equipment for machine type communication. The terminal device may also be referred to as a User Equipment (UE), a Mobile Station (MS), a mobile terminal (mobile terminal), a terminal (terminal), and so on. The terminal device may communicate with one or more core networks via the RAN, and thus may also be referred to as a wireless terminal, which may be a device that provides voice and/or data connectivity to a user, a handheld device having wireless connection capability, or other processing device connected to a wireless modem. The terminal device may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device having wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, or a wearable device, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. In the embodiment of the present application, the terminal device is not specifically limited.

The network equipment and the terminal equipment in the embodiment of the application can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; can also be deployed on the water surface; it may also be deployed on airborne airplanes, balloons and satellite vehicles. The embodiment of the application does not limit the application scenarios of the network device and the terminal device. Optionally, the system architecture shown in fig. 1 may further include other network entities such as a network controller and a mobility management entity, which is not limited in this embodiment.

The embodiment provided by the application can be applied to the process that the terminal equipment is accessed into the network equipment. The terminal equipment can start random access under various possible scenes. For example, a terminal device may initiate random access in the following scenario: (1) after the state of the terminal device is switched from a Radio Resource Control (RRC) idle state to an RRC connected state, the terminal device initiates random access when establishing a radio link with the network device. (2) After a radio link between the terminal equipment and the network equipment fails, the terminal equipment and the network equipment initiate random access when RRC connection is reestablished. (3) When the terminal equipment is in an RRC connection state and uplink is asynchronous, if uplink or downlink data arrives, random access is initiated. (4) The random access is initiated when the terminal device is in an RRC connected state but a dedicated resource for transmitting a scheduling request has not been configured for the terminal device on a Physical Uplink Control Channel (PUCCH). (5) And initiating random access when the scheduling request fails. (6) And initiating random access when the RRC is requested during the synchronous reconfiguration. (7) And initiating random access when the state of the terminal equipment is switched from the RRC inactive state to the RRC connected state. (8) Random access is initiated when other system information is requested except for a Master Information Block (MIB) and a System Information Block (SIB). (9) And initiating random access when the wave beam fails to recover.

The random access according to the embodiments of the present application may include four-step random access (also referred to as a four-step random access channel, or also simply referred to as a 4-step RACH) and two-step random access (also referred to as a two-step random access channel, or also simply referred to as a 2-step RACH). For ease of understanding, the procedures for 4-step RACH and 2-step RACH are described in detail below, respectively.

Fig. 4 is a flow chart of 4-step RACH. The details of 4-step RACH may be referred to the relevant provisions in the protocol TS 38.300. As shown in fig. 4, the flow of 4-step RACH may include:

s401, the terminal device sends the Msg1 to the network device.

Msg1 may also be referred to as Msg1, or Msg 1. The Msg1 is used for transmitting a random access preamble, which may also be referred to as a random access preamble sequence, or preamble sequence. In this embodiment, the preamble and the resource occupied by transmitting the preamble are referred to as Physical Random Access Channel (PRACH) resources. Optionally, the terminal device may select a PRACH resource and a preamble, and send the selected preamble on the selected PRACH resource. If the random access mode is non-contention based random access, the PRACH resource and the preamble may be specified by the base station, and the base station may estimate a Timing Advance (TA) and an uplink grant size required by the terminal device to transmit Msg3 based on the preamble sent by the terminal device. In this embodiment, the network device may broadcast the available PRACH resources through a system broadcast message.

S402, the network device sends the Msg2 to the terminal device.

Msg2 may also be referred to as Msg2, or Msg 2. Wherein, the Msg2 includes a resource configured by the network device to the terminal device for sending a payload (payload), and the payload may also be understood as service data. After the terminal device sends the Msg1, a random access Response time Window (RA-Response Window) may be opened, and a Physical Downlink Control Channel (PDCCH) scrambled by a random access radio network temporary identifier (RA-RNTI) may be monitored in the random access Response time Window. After the terminal device successfully receives the PDCCH scrambled by the RA-RNTI, the terminal device can obtain a Physical Downlink Shared Channel (PDSCH) scheduled by the PDCCH, where the PDSCH includes a Random Access Response (RAR). The RAR is not described in detail in the embodiment of the present application. And if the terminal receives the PDCCH scrambled by the RAR-RNTI and the RAR contains the preamble index sent by the terminal, the terminal considers that the random access response is successfully received. For non-contention based random access, after the terminal successfully receives the Msg2, the random access procedure ends. For contention-based random access, after the terminal device successfully receives Msg2, it needs to continue transmitting Msg3 and receiving Msg 4.

And S403, the terminal device sends the Msg3 to the network device.

Msg3 may also be referred to as Msg3, or Msg 3. Where Msg3 is the first scheduled transmission in the random access process, the terminal device sends service data, such as an RRC connection request message, a tracking area update message, etc., on the resources configured for it by the network device. The Msg3 may inform the network device what event triggered the RACH procedure. For example, if it is an initial access random procedure, the Msg3 will carry the UE ID and the establishment cause (establishment cause); if the RRC is reestablished, the UE identification and establishment cause (initialization cause) in a connected state are carried.

S404, the network device sends the Msg4 to the terminal device.

Msg4 may also be referred to as Msg4, or Msg 4. Wherein the Msg4 is used to indicate whether the terminal device successfully accesses the network device.

Fig. 5 is a flow chart of 2-step RACH. As shown in fig. 5, the flow of the 2-step RACH may include:

s501, the terminal device sends MsgA to the network device.

MsgA may also be referred to as MsgA, or MsgA. Wherein, the MsgA includes a preamble and service data. Unlike the 2-step RACH described above, the network device may configure available PRACH resources (for carrying preambles) and resources for carrying traffic data of the terminal device in the system broadcast message. This simplifies the random access procedure of the terminal device.

S502, the network equipment sends the MsgB to the terminal equipment.

MsgB may also be referred to as MsgB, or MsgB, for indicating whether the terminal device has successfully accessed the network device.

The access method according to the embodiments of the present application will be described in detail with reference to specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Fig. 6 is a flowchart illustrating an embodiment of an access method according to an embodiment of the present application. As shown in fig. 6, an access method provided in an embodiment of the present application may include:

s601, the network device sends first configuration information on a first downlink carrier, where the first configuration information is used to indicate a first uplink resource, the first uplink resource is located on a second uplink carrier, the second uplink carrier is a supplemental uplink SUL, and frequency points of the first uplink carrier and the second uplink carrier corresponding to the first downlink carrier are different.

S602, the terminal device sends a first signal or first information on the first uplink resource.

S603, the network device determines whether the terminal device accesses the network device in the first downlink carrier according to the first signal or the first information.

S604, when the terminal device accesses the network device on the first downlink carrier, the network device sends a downlink signal on the first downlink carrier.

In the above S601, the first downlink carrier corresponds to the first uplink carrier, and the frequency points corresponding to the first downlink carrier and the first uplink carrier in this embodiment may be the same, for example, the frequency points are all 3.5GHz, 4.9GHz, or 6GHz, and the like. Similarly, the second downlink carrier corresponds to the second uplink carrier.

In this embodiment of the present application, the second uplink carrier is a supplemental uplink SUL, and it can also be said that the uplink resource occupied by the SUL of the first uplink carrier is allocated on the second uplink carrier. The second uplink carrier is used as the SUL, and the frequency points of the first uplink carrier and the second uplink carrier may be different. Optionally, in order to improve uplink coverage of the cell, so that the network device can receive an uplink signal of the terminal device located in the cell edge area, the frequency point of the second uplink carrier in the embodiment of the present application may be lower than the frequency point of the first uplink carrier. Therefore, the path loss of the terminal device is smaller when the terminal device has the same transmission power, and the network device can receive the uplink signal sent when the terminal device is in the cell edge area. Illustratively, when the frequency point of the first uplink carrier is 3.5GHz or 4.9GHz, the frequency point of the second uplink carrier may be 2.0GHz, 2.3GHz, or 2.6 GHz. When the frequency point of the first uplink carrier is 4.9GHz, even 6GHz higher, the frequency point of the second uplink carrier may be a millimeter wave frequency point, for example, 3.5 GHz. In the following embodiments, the frequency point of the first uplink carrier is 3.5GHz, and the frequency point of the second uplink carrier is 2.6 GHz.

In order to enable the terminal device to send the downlink carrier that the terminal device randomly accesses to the network device in the process of random access, in this embodiment of the present application, the network device may send the first configuration information on the first downlink carrier. The first configuration information may indicate that the terminal device feeds back a downlink carrier of the access network device, where the downlink carrier may be a first downlink carrier or a second downlink carrier. It can also be said that the first configuration information may indicate that the terminal device feeds back whether the terminal device accesses the network device with the SUL.

It should be understood that, in this embodiment of the present application, the SUL and the NUL on the second uplink carrier occupy the same uplink resource on the second uplink carrier, that is, the uplink resource on the second uplink carrier for accessing the network device on the SUL is the same as the uplink resource on the NUL for accessing the network device. In this embodiment of the application, the first configuration information is used to indicate a first uplink resource, where the first uplink resource is located on the second uplink carrier, or in other words, the first configuration information is used to indicate the first uplink resource located on the second uplink carrier. The first uplink resource may be different from a resource carrying a preamble sequence of the terminal device. The first uplink resource may be a PRACH resource or a Physical Uplink Shared Channel (PUSCH) resource on the second uplink carrier, and the like.

In this embodiment of the present application, one possible implementation manner of the first configuration information indicating the first uplink resource is as follows: the first configuration information may include an index of an uplink resource, where the index of the uplink resource may have a mapping relationship with the uplink resource on the second uplink carrier. Another possible implementation manner of the first configuration information indicating the first uplink resource is as follows: the first configuration information may include a resource parameter of the first uplink resource, for example, the resource parameter may be a starting position and a resource length of the first uplink resource on the second uplink carrier. Another possible implementation manner of the first configuration information indicating the first uplink resource is as follows: the first configuration information may include an encoding result of the resource parameter of the first uplink resource, for example, the encoding result may be a result of encoding a starting position and a resource length of the first uplink resource on the second uplink carrier. It should be understood that, in the embodiment of the present application, a manner in which the first configuration information indicates the first uplink resource is not limited.

The first uplink resource may be used to carry a first signal or first information from the terminal device, where the first signal or the first information may be used to indicate that the terminal device accesses a downlink carrier of the network device. In this embodiment of the application, the timing when the network device sends the first configuration information to the terminal device may be before receiving the preamble sequence from the terminal device, or after receiving the preamble sequence from the terminal device. In the process of random access by the terminal device, the network device may send the first configuration information alone, or the network device may send the first configuration information carried in an existing message, where the existing message is, for example, a system broadcast message in fig. 4 or fig. 5, Msg2, and the like.

In the above S602, the terminal device may receive the first configuration information from the network device on the first downlink carrier. The terminal device may determine, according to the first configuration information, that the downlink carrier of the access network device needs to be fed back, that is, determine whether the terminal device needs to be fed back to the network device to access the network device by the SUL. In this embodiment, the terminal device may determine the first uplink resource according to the first configuration information. For example, the terminal device may determine the first uplink resource on the second uplink carrier according to the index of the uplink resource in the first configuration information and the mapping relationship between the index of the uplink resource and the uplink resource on the second uplink carrier. Or, the terminal device may determine the first uplink resource on the second uplink carrier according to the resource parameter of the first uplink resource in the first configuration information, such as the starting position and the resource length. Or, the terminal device may decode the resource parameter to obtain the resource parameter, and then determine the first uplink resource on the second uplink carrier according to the resource parameter. It should be understood that, in the embodiment of the present application, the terminal device determines the manner of the first uplink resource according to the first configuration information, depending on the manner in which the first configuration information indicates the first uplink resource.

In this embodiment, the terminal device may send the first signal or the first information on the first uplink resource to indicate that the terminal device accesses the downlink carrier of the network device. The first information may be content of a downlink carrier indicating that the terminal device accesses the network device, such as an identifier, an indicator bit, and the like of the downlink carrier. The first signal may be a discrete signal, such as a sequence or a preamble sequence, and the first signal is different from the first information in that the first signal does not carry the content. The terminal device sends a first signal or first information to the network device, depending on a first uplink resource allocated to the terminal device by the network device. If the first uplink resource is a PRACH resource and information that can be carried on the PRACH resource is limited, the terminal device may send a first signal, such as a sequence or a preamble sequence, that occupies a smaller resource on the PRACH resource. If the first uplink resource is a PUSCH resource and the PUSCH resource can carry more information, the terminal device may send the first information on the PUSCH resource, for example, the first information may be an indicator bit. Optionally, the manner in which the first signal indicates the terminal device to access the network device through the SUL may be: and in the first uplink resource bearing sequence, the sequence is used for indicating the terminal equipment to access the network equipment by the SUL. Or, the manner in which the first information indicates that the terminal device accesses the network device through the SUL may be: the first uplink resource may include a bit indicating that the terminal device accesses the network device with the SUL, for example, 1 may characterize that the terminal device accesses the network device with the SUL, and 0 may characterize that the terminal device accesses the network device with the NUL on the second uplink carrier.

For example, if the network device sends the first configuration information on the first downlink carrier with the frequency point of 3.5GHz, the terminal device accessing the network device on the first downlink carrier with the frequency point of 3.5GHz may receive the first configuration information, and the terminal device accessing the network device on the first downlink carrier with the frequency point of 2.6GHz may not receive the first configuration information. In the terminal device capable of receiving the first configuration information, the terminal device accessing the network device with the SUL may feed back the first signal or the first information on the first uplink resource of the second uplink carrier. The first signal or the first information is used to represent that a downlink carrier of the terminal device accessing the network device is a first downlink carrier, or the first signal or the first information is used to represent that the terminal device accesses the network device by the SUL. That is, the first uplink resource may include bit 1 indicating that the terminal device accesses the network device by the SUL, or the bit does not include a value of the bit. It should be noted that, in this embodiment, since the terminal device accessing the network device via the first downlink carrier with the frequency point of 2.6GHz cannot receive the first configuration information, the terminal device does not feed back the second downlink carrier accessing the network device to the network device in the process of random access.

In the above S603, if the network device receives the preamble sequences from the two terminal devices on the same uplink resource of the second uplink carrier, it is impossible to distinguish which downlink carrier corresponding to the preamble sequence is the first downlink carrier or the second downlink carrier by using the current technical solution. In this embodiment, the network device may receive the first signal or the first information from the terminal device on the first uplink resource, and therefore, the network device may determine the downlink carrier corresponding to the preamble sequence according to the first signal or the first information. For example, in this embodiment of the application, the downlink carrier corresponding to the preamble sequence may be determined according to the downlink carrier indicated by the first signal or the first information, and if the first information includes the indication bit 1, the downlink carrier corresponding to the preamble sequence may be determined to be the first downlink carrier.

In the above S604, in this embodiment of the application, the network device may distinguish the downlink carrier where the terminal device accesses the network device. When the terminal device accesses the network device on the first downlink carrier, the network device may send a downlink signal on the first downlink carrier. When the terminal device accesses the network device on the second downlink carrier, the network device may send a downlink signal on the second downlink carrier. It should be understood that the downlink signal may be a signal sent by the terminal device to the network device in the random access process shown in fig. 4 or fig. 5. For example, if the terminal device accesses the network device on the first downlink carrier with the frequency point of 3.5GHz, the network device may send the downlink signal on the first downlink carrier with the frequency point of 3.5GHz, and if the terminal device accesses the network device on the second downlink carrier with the frequency point of 2.6GHz, the network device may send the downlink signal on the second downlink carrier with the frequency point of 2.6 GHz.

The access method provided by the embodiment of the application comprises the following steps: the network equipment sends first configuration information on a first downlink carrier, the first configuration information is used for indicating a first uplink resource on a second uplink carrier, the terminal equipment sends a first signal or first information on the first uplink resource, the network equipment determines whether the terminal equipment is accessed to the network equipment on the first downlink carrier according to the first signal or the first information, and when the terminal equipment is accessed to the network equipment on the first downlink carrier, the network equipment sends a downlink signal on the first downlink carrier. In the embodiment of the application, in the process of random access of the terminal device, the network device may configure, for the terminal device, the first uplink resource for feeding back the downlink carrier accessed to the network device, so that the terminal device feeds back the downlink carrier accessed to the network device on the first uplink resource, thereby achieving the purpose that the network device can distinguish the downlink carrier accessed to the network device from the terminal device, and further the network device may send the downlink signal on the downlink carrier corresponding to the terminal device, so that the terminal device can receive the downlink signal from the network device.

On the basis of the above embodiment, in the process of random access of the terminal device, the network device may send the first configuration information to the terminal device alone. However, in the embodiment of the present application, in order to save the interactive signaling with the network device in the random access process of the terminal device, the first configuration information may be carried in the interactive message between the current 4-step RACH or 2-step RACH terminal device and the network device. In a 4-step RACH scenario, there are two ways for a network device to send first configuration information to a terminal device, where the first way is: the first configuration information is carried in a system broadcast message. The second way is: the first configuration information is carried in Msg 2. In a 2-step RACH scenario, a manner for the network device to send the first configuration information to the terminal device may be: the first configuration information is carried when the system broadcasts the message. It should be understood that, in these three ways, in order to save uplink resources of the second uplink carrier, the network device may configure the same time-frequency code resources for the SUL and the NUL on the second uplink carrier. That is to say, for example, in this embodiment of the application, the network device may send fourth configuration information on a second downlink carrier corresponding to a second uplink carrier, where the fourth configuration information is used to indicate a fourth uplink resource on the second uplink carrier. And the fourth uplink resource is used for carrying the preamble sequence. The above "the network device may configure the same time-frequency code resource for the SUL and the NUL on the second uplink carrier" may be understood as follows: the uplink resource carrying the preamble sequence and the fourth uplink resource configured for the SUL by the network device may occupy the same time-frequency code resource on the second uplink carrier. It should be appreciated that the fourth configuration information may be carried in a system broadcast message.

The following first describes an access method provided in an embodiment of the present application with reference to a first method in a 4-step RACH scenario. Fig. 7 is a flowchart illustrating an access method according to another embodiment of the present application. As shown in fig. 7, an access method provided in an embodiment of the present application may include:

s701, the network device sends a system broadcast message on the first downlink carrier, where the system broadcast message includes first configuration information and second configuration information.

S702, the terminal device sends the Msg1 to the network device on the second uplink resource, and sends the first signal to the network device on the first uplink resource.

And S703, the network device determines whether the terminal device accesses the network device in the first downlink carrier according to the first signal.

S704, when the terminal device accesses the network device on the first downlink carrier, the network device sends Msg2 to the terminal device on the first downlink carrier.

In the embodiment of the present application, S403 and S404 in fig. 4 may be further included after S704.

In the above S701, the network device may periodically transmit the system broadcast message on the first downlink carrier. The system broadcast message in the embodiment of the present application may include first configuration information and second configuration information. In this embodiment, a System Information Block (SIB) of a system broadcast message may carry first configuration information and second configuration information. The second configuration information is used to indicate a second uplink resource on a second uplink carrier, where the second uplink resource is used to carry a preamble sequence. For example, each cell may correspond to 64 available preamble sequences, one preamble sequence may correspond to one second uplink resource, or multiple preamble sequences may correspond to one second uplink resource, or one preamble sequence may correspond to multiple second uplink resources. For example, one preamble sequence corresponds to one time-frequency resource on the second uplink carrier, and then 64 preamble sequences correspond to 64 resources that are independent of "time domain, frequency domain, and code domain", or multiple preamble sequences may correspond to one resource determined by "time domain, frequency domain, and code domain". The manner in which the second configuration information indicates the second uplink resource may refer to the description related to the first configuration information.

Different from the above technical solution shown in fig. 4, in this embodiment, in addition to configuring the second uplink resource carrying the preamble sequence in the system broadcast message, the network device may also configure the first uplink resource carrying the first signal or the first information. In this embodiment of the present application, the first uplink resource and the second uplink resource may both be PRACH resources on a second uplink carrier, where the first uplink resource is used to carry a first signal, and the first signal may be a sequence. The preamble sequence and the sequence have a corresponding relationship, for example, one preamble sequence of the second uplink resource bearer corresponds to one sequence of the first uplink resource bearer, or a plurality of preamble sequences of the second uplink resource bearer correspond to one sequence of the first uplink resource bearer. Fig. 8 is a schematic resource allocation diagram according to an embodiment of the present application. In fig. 8, two different second uplink resources a1 and a2 are shown on the second uplink carrier, where a1 is used to carry preamble sequence 1 and a2 is used to carry preamble sequence 2. The first uplink resource corresponding to the second uplink resource a1 is B1, B1 is used for carrying sequence 1, the first uplink resource corresponding to the second uplink resource a2 is B2, and B2 is used for carrying sequence 2. Accordingly, leader sequence 1 corresponds to sequence 1 and leader sequence 2 corresponds to sequence 2. Exemplarily, in fig. 8, a preamble sequence corresponds to a sequence as an example. Optionally, the second uplink resource a1 may also be used to carry a preamble sequence 3, that is, the preamble sequence 1 and the preamble sequence 3 carried on the second uplink resource a1 correspond to the sequence 1 carried by the first uplink resource B1.

In the above S702, after receiving the system broadcast message, the terminal device may determine the first uplink resource and the second uplink resource on the second uplink carrier. The manner in which the terminal device determines the second uplink resource on the second uplink carrier may refer to the description that the terminal device determines the first uplink resource on the second uplink carrier. In this embodiment, the terminal device may send the Msg1 to the network device on the second uplink resource, where the Msg1 may include a preamble sequence, and the process may refer to the relevant description in S401. Since the Msg1 is used to carry a preamble sequence, and the second uplink resource and the fourth uplink resource may be the same in this embodiment, in order to enable the network device to distinguish the downlink carrier where the terminal device accesses the network device, the terminal device in this embodiment may send a first signal on the first uplink resource, where the first signal may be a sequence, that is, the first signal may be carried in the form of a sequence. It should be understood that the sequence in the embodiment of the present application may be a discrete signal carried on the first uplink resource. The first signal is used for indicating the terminal equipment to access the network equipment in the first downlink carrier. Fig. 9 is a schematic diagram of a preamble sequence and a sequence correspondence provided in an embodiment of the present application. As shown in fig. 9, when the terminal device transmits the preamble sequence 1 on the second uplink resource, the terminal device may transmit the sequence 1 (e.g., Seq set1) corresponding to the preamble sequence 1 on the first uplink resource.

In the above S703, the network device may receive the Msg1 on the second uplink resource, and when the network device detects the preamble sequence in the Msg1, the network device may detect whether there is the first signal from the terminal device on the first uplink resource corresponding to the second uplink resource. If the network device detects that the first uplink resource carries the first signal, it may be determined that the terminal device accesses the network device in the first downlink carrier.

In the above S704, since the terminal device accesses the network device on the first downlink carrier, the network device in this embodiment may send Msg2 on the first downlink carrier, so that the terminal device receives Msg2 successfully.

In the embodiment of the application, the network device may configure a first uplink resource carrying the first signal in a system broadcast message of the 4-step RACH, and the terminal device may feed back a downlink carrier accessed to the network device on the first uplink resource, so that the network device may distinguish the downlink carrier accessed to the network device by the terminal device.

The following first describes an access method provided in the embodiment of the present application with reference to the second method in a 4-step RACH scenario. Fig. 10 is a flowchart illustrating an access method according to another embodiment of the present application. As shown in fig. 10, an access method provided in an embodiment of the present application may include:

s1001, the network device sends the second configuration information on the first downlink carrier.

And S1002, the terminal device sends the Msg1 to the network device on the second uplink resource.

S1003, the network equipment sends Msg2 on the first downlink carrier and the second downlink carrier, the Msg2 comprises first configuration information, and the first uplink resource is an uplink resource of a message three Msg3 of the bearer terminal equipment.

S1004, the terminal device sends the Msg3 to the network device on the first uplink resource, wherein the Msg3 comprises the first information.

S1005, the network device determines whether the terminal device accesses the network device in the first downlink carrier according to the first information.

And S1006, when the terminal device accesses the network device on the first downlink carrier, the network device sends Msg4 to the terminal device on the first downlink carrier.

In S1002 in this embodiment of the present application, reference may be made to the relevant description in S401, where the second configuration information in S1001 is used to indicate a second uplink resource on a second uplink carrier, where the second uplink resource is used to carry a preamble sequence, and this step may refer to a technical scheme in which the current network device configures the uplink resource carrying the preamble sequence for the terminal device.

In the above S1003, because the Msg1 is used to carry the preamble sequence, but the second uplink resource and the fourth uplink resource are the same in this embodiment, after the network device receives the preamble sequence on the second uplink resource, it cannot distinguish whether the downlink carrier of the terminal device accessing the network device is the first downlink carrier or the second downlink carrier. In order to ensure that the terminal device can receive the uplink resource carrying the message three Msg3 configured for the terminal device by the network device, so that the terminal device can smoothly access the network device, in this embodiment of the present application, the network device may send Msg2 on both the first downlink carrier and the second downlink carrier. The Msg2 includes first configuration information, the first uplink resource indicated by the first configuration information is an uplink resource for carrying service data of the terminal device, and the service data may be Msg 3. It should be understood that the uplink resource configured by the network device for the terminal device to carry the Msg3 may be a PUSCH resource on the second uplink carrier. Optionally, in this embodiment of the present application, the network device may allocate bits carrying the first information on the PUSCH resource.

In the above S1004, since the first uplink resource may be a PUSCH resource on the second uplink carrier, and may carry more information than the first uplink resource shown in the above fig. 7, the first uplink resource in the embodiment of the present application may be used to carry the first information. The end device may send Msg3 to the network device on the first uplink resource, where the Msg3 may include the first information. That is to say, in this embodiment of the application, the terminal device may send the Msg3 on a PUSCH resource, and may also carry the first information on the PUSCH resource. It should be understood that, when the terminal device receives the Msg2 on the first downlink carrier, it may determine whether to carry the first information on the PUSCH resource according to the downlink carrier of the terminal device accessing the network device, where the first information is used to instruct the terminal device to access the network device on the first downlink carrier. For example, the terminal device may carry the first information on bits of PUSCH resources allocated by the network device.

In the above S1005, when the network device receives the Msg3 on the first uplink resource, it may detect whether the corresponding bit on the first uplink resource carries the first information. If it is detected that the corresponding bit on the first uplink resource carries the first information, it may be determined that the terminal device accesses the network device in the first downlink carrier.

In S1006, since the terminal device accesses the network device on the first downlink carrier, the network device in this embodiment may send Msg4 to the terminal device on the first downlink carrier.

In this embodiment, the network device may configure a first uplink resource carrying first information in the Msg2 of the 4-step RACH, and the terminal device may feed back a downlink carrier accessed to the network device on the first uplink resource, so that the network device may distinguish the downlink carrier accessed to the network device by the terminal device.

The following describes an access method provided by the embodiment of the present application with reference to a 2-step RACH scenario. Fig. 11 is a flowchart illustrating an access method according to another embodiment of the present application. As shown in fig. 11, an access method provided in an embodiment of the present application may include:

s1101, the network device sends a system broadcast message on the first downlink carrier, where the system broadcast message includes first configuration information and third configuration information, and the first configuration information and the third configuration information are included in one configuration information.

S1102, the terminal device sends the first information and the MsgA service data to the network device on the first uplink resource, and sends the MsgA preamble sequence to the network device on the third uplink resource.

S1103, the network device determines whether the terminal device accesses the network device in the first downlink carrier according to the first information.

S1104, when the terminal device accesses the network device on the first downlink carrier, the network device sends MsgB to the terminal device on the first downlink carrier.

In the above S1101, based on the difference between the 2-step RACH and the 4-step RACH, the embodiment of the present application is different from the above S701 in that the system broadcast message includes the first configuration information and the third configuration information. The first configuration information and the third configuration information may be configured in one configuration information, or it may be said that the system broadcast message includes the configuration information, and the configuration information includes the first configuration information and the third configuration information. In this embodiment, the SIB of the system broadcast message may carry the first configuration information and the third configuration information. It should be noted that, because in the 2-step RACH, the terminal device may carry the preamble sequence and the service data in one message (MsgA), the configuration information in the system broadcast message in the embodiment of the present application needs to configure the uplink resource carrying the service data and the uplink resource carrying the preamble sequence for the terminal device. Correspondingly, the third configuration information in this embodiment is used to indicate a third uplink resource on the second uplink carrier, where the third uplink resource is used to carry the preamble sequence. It should be understood that, the manner in which the third configuration information indicates the third uplink resource may refer to the related description in the above embodiment in which the first configuration information indicates the first uplink resource.

In view that the third uplink resource and the fourth uplink resource may be the same in the embodiment of the present application, the first configuration information may be carried in the system broadcast message, where the first configuration information is used to indicate a first uplink resource, and the first uplink resource is used to carry an uplink resource of service data of a terminal device, where the first uplink resource is also used to carry a first signal or first information. In this embodiment of the application, the first uplink resource may be a PUSCH resource on the second uplink carrier, and the PUSCH resource may carry more information than the first uplink resource shown in fig. 7, so the first uplink resource in this embodiment of the application may be used to carry the first information. That is to say, in this embodiment of the present application, the terminal device may send the service data on the PUSCH resource, and may also carry the first information on the PUSCH resource. Optionally, in this embodiment of the present application, the network device may allocate bits carrying the first information on the PUSCH resource. The preamble sequence carried by the third configuration information and the PUSCH resource indicated by the first configuration information have a corresponding relationship. The system broadcast message may carry the corresponding relationship.

In the above S1102, after receiving the system broadcast message, the terminal device may determine the first uplink resource according to the first configuration information, and determine the third uplink resource according to the third configuration information. The terminal device may send information carried on the PUSCH resource in the MsgA on the first uplink resource, where the information carried on the PUSCH resource includes traffic data of the terminal device and the first information, and the terminal device may send a preamble sequence of the MsgA on the third uplink resource. It can also be said that the terminal device sends the traffic data and the first information of MsgA on the first uplink resource (PUSCH resource), and the terminal device sends the preamble sequence of MsgA on the third uplink resource. The first information is used to indicate that the terminal device accesses the network device on the first downlink carrier, that is, the terminal device carries the first information on the PUSCH resource, and the first information indicates that the terminal device accesses the network device by the SUL. It should be understood that, the manner in which the terminal device determines the third uplink resource according to the third configuration information may refer to the description in the foregoing embodiment in which the terminal device determines the first uplink resource according to the first configuration information.

In the above S1103, after receiving the preamble sequence on the third uplink resource, the network device may detect the first information on the PUSCH resource corresponding to the preamble sequence. If the PUSCH resource carries the first information, it may be determined that the terminal device accesses the network device on the first downlink carrier, that is, it may be determined that the terminal device accesses the network device by the SUL. For example, the network device may check bits on the PUSCH resource to detect whether the first information is carried on the PUSCH resource. And if the bit of the PUSCH resource bears the first information, determining that the terminal equipment accesses the network equipment by the SUL.

In the above S1104, because the terminal device accesses the network device on the first downlink carrier, in this embodiment of the application, the network device may send the MsgB to the terminal device on the first downlink carrier.

In the embodiment of the application, the network device may configure a first uplink resource carrying or first information in a system broadcast message of the 2-step RACH, and the terminal device may feed back a downlink carrier accessed to the network device on the first uplink resource, so that the network device may distinguish the downlink carrier accessed to the network device by the terminal device.

Wherein, the technical solutions in fig. 7, fig. 10 and fig. 11 are as follows: in the process of accessing the network device by the terminal device, the network device may carry the first configuration information in a message sent to the terminal device, so as to configure a first uplink resource carrying the first signal or the first information. Fig. 12 described below provides another access method, in the method shown in fig. 12, a network device may pre-configure a code domain resource set of a preamble sequence of a terminal device for accessing the network device on a first downlink carrier, and when the terminal device carries the preamble sequence in the code domain resource set, the network device may determine that the terminal device accesses the network device on the first downlink carrier. It should be understood that, in this embodiment of the present application, the resource configured by the network device for the SUL and carrying the preamble sequence may occupy a time-frequency resource different from that occupied by the fourth uplink resource on the second uplink carrier, so that the network device may determine, by using the time domain, the frequency domain, and the code domain of the resource carrying the preamble sequence, whether the terminal device accesses the network device by using the SUL. In this embodiment, in order to save the occupation of the uplink resource on the second uplink carrier, the resource configured by the network device for the SUL and bearing the preamble sequence may occupy the same time-frequency resource as the fourth uplink resource on the second uplink carrier, and then the network device may determine whether the terminal device accesses the network device by the SUL using the code domain resource bearing the preamble sequence. Fig. 12 and fig. 13 below both take the time-frequency resource configured by the network device as the SUL, where the resource carrying the preamble sequence and the fourth uplink resource occupy the same time-frequency resource on the second uplink carrier as an example.

The following first describes an access method provided in the embodiment of the present application with reference to a 4-step RACH scenario. Fig. 12 is a flowchart illustrating an access method according to another embodiment of the present application. As shown in fig. 12, an access method provided in an embodiment of the present application may include:

s1201, a network device sends a system broadcast message on a first downlink carrier, where the system broadcast message includes first configuration information, and the first configuration information is specifically used to indicate a code domain resource set of a first uplink resource.

S1202, the terminal device sends the Msg1 to the network device, and the first signal is a leader sequence of the Msg 1.

S1203, the network device determines whether the terminal device accesses the network device in the first downlink carrier according to the first signal.

And S1204, when the terminal device accesses the network device on the first downlink carrier, the network device sends Msg2 to the terminal device on the first downlink carrier.

S1204 in the embodiment of the present application may refer to the description related to S704 described above.

In the foregoing S1201, different from the technical solutions in the foregoing fig. 7, fig. 10, and fig. 11, that the first configuration information in the system broadcast message in the embodiment of the present application indicates a code domain resource set of a first uplink resource, where the first uplink resource is used for carrying a preamble sequence. In the above technical solutions in fig. 7, fig. 10 and fig. 11, the second uplink resource and the fourth uplink resource occupy the same time-frequency code resource on the second uplink carrier, or the third uplink resource and the fourth uplink resource occupy the same time-frequency code resource on the second uplink carrier, so that the network device needs to additionally configure the uplink resource for feeding back the first signal or the first information to the terminal device. In the embodiment of the present application, the time-frequency resources occupied by the first uplink resource and the fourth uplink resource on the second uplink carrier are the same, but the occupied code domain resources may be different, so that the network device may configure a code domain resource set for the terminal device accessing the network device with the SUL, and the network device may determine whether the terminal device accesses the network device with the SUL according to the code domain carrying the preamble sequence. And the leader sequence in the code domain resource set is used for indicating the terminal equipment to access the network equipment in the first downlink carrier.

In this embodiment of the present application, a manner in which the first configuration information indicates the code domain resource set of the first uplink resource may be: the first configuration information may include code domain parameters of the first uplink resource, such as a start position of a code domain and a resource length. For example, the network device may carry new information in the first configuration information to indicate the code domain range of the first uplink resource. Two entries, total Number Of RA-Preambles and total Number Of SUL-Preambles, may be newly introduced in the RACH-Config Common field. Wherein, the total Number Of RA-Preambles represents the initial id Of the code domain resource, and the total Number Of SUL-Preambles is used for representing the Number Of ids in the code domain resource set. When the total Number Of RA-Preambles is 30 and the total Number Of SUL-Preambles is 10, the set Of code domain resources Of the first uplink resource is 10 code domains with id from 30 to 39. For example, the set of code domain resources of the preamble sequence of the network device accessing the network device for the terminal device on the first downlink carrier may be 10 code domains with id from 30 to 39. Optionally, the code domain resource set of the preamble sequence of the network device accessing the network device for the terminal device on the second downlink carrier may be 10 code domains with ids from 40 to 49. In this embodiment, the SIB of the system broadcast message may carry the first configuration information.

In the above S1202, the terminal device may determine to send the Msg1 in the corresponding code domain resource set according to the downlink carrier of the access network device, that is, send the preamble sequence in the corresponding code domain resource set. It should be understood that, in the embodiment of the present application, the first uplink resource is a PRACH resource that carries a preamble sequence, and the preamble sequence may be the first signal. The preamble sequence may indicate that the terminal device accesses the downlink carrier of the network device, for example, if the terminal device accesses the network device on the first downlink carrier, the network device may determine the preamble sequence to be used in a code domain of the code domain resource set 30 to 39.

In S1203, the network device may determine whether the terminal device accesses the network device in the first downlink carrier according to the preamble sequence. In this embodiment, the network device may determine whether the terminal device accesses the network device in the first downlink carrier according to a code domain resource set in which a code domain resource carrying a preamble sequence is located. And the leader sequence positioned in the code domain resource set indicates the terminal equipment to access the network equipment in the first downlink carrier. For example, if the set of code domain resources in which the code domain resource carrying the preamble sequence is located is 10 code domains of 30 to 39, the network device may determine that the terminal device accesses the network device on the first downlink carrier, that is, the terminal device accesses the network device with SUL. If the set of code domain resources in which the code domain resource carrying the preamble sequence is located is 10 code domains from 40 to 49, the network device may determine that the terminal device accesses the network device on the second downlink carrier.

In this embodiment, the network device may configure a code domain resource set carrying a first uplink resource of the first signal in a system broadcast message of the 4-step RACH, the terminal device may feed back a downlink carrier accessed to the network device in a manner of carrying a preamble sequence, and the network device may determine, according to whether a code domain carrying resources of the preamble sequence is in the code domain resource set, the downlink carrier accessed to the network device by the terminal device.

The following describes an access method provided in the embodiment of the present application with reference to a 2-step RACH scenario. Fig. 13 is a flowchart illustrating an access method according to another embodiment of the present application. As shown in fig. 13, an access method provided in an embodiment of the present application may include:

s1301, the network device sends a system broadcast message on the first downlink carrier, where the system broadcast message includes first configuration information and third configuration information, and the first configuration information is used to indicate a code domain resource set corresponding to the first uplink resource.

S1302, the terminal device sends MsgA to the network device, the MsgA includes a preamble sequence and service data sent by the terminal device to the network device on a third uplink resource, and the first signal is the preamble sequence.

And S1303, the network device determines whether the terminal device accesses the network device in the first downlink carrier according to the first signal.

S1304, when the terminal device accesses the network device on the first downlink carrier, the network device sends MsgB to the terminal device on the first downlink carrier.

In the embodiment S1304 of the present application, reference may be made to the description related to the embodiment S1104. The first configuration information in S1301 may refer to the description related to the first configuration information in S1201 described above, and the third configuration information may refer to the description related to the third configuration information in S1101 described above. In S1302, MsgA includes a leader sequence, and reference may be made to the related description of the leader sequence in Msg1 in S1202. The manner in which the network device determines whether the terminal device accesses the network device in the first downlink carrier in S1303 may refer to the related description in S1202.

In this embodiment, the network device may configure, in a system broadcast message of the 2-step RACH, a code domain resource set of a first uplink resource carrying a first signal, and a technical effect of this embodiment may refer to the technical effect in fig. 12 described above.

The second uplink carrier is an SUL, and in the above embodiment, it is described that the resource corresponding to the SUL having the frequency point of 3.5GHz may be configured on the second uplink carrier having the frequency point of 2.6GHz, and the resource corresponding to the SUL having the frequency point of 4.9GHz may also be configured on the second uplink carrier. In this scenario, the SUL with a frequency point of 4.9GHz and the SUL with a frequency point of 3.5GHz may occupy the same uplink resource on the second uplink carrier, and the network device may allocate a third uplink carrier and a third downlink carrier to the frequency band corresponding to the frequency point of 4.9GHz, where the frequency point of the third uplink carrier corresponding to the third downlink carrier is different from that of the first uplink carrier. The frequency point of the third uplink carrier may be higher or lower than the frequency point of the first uplink carrier. Similar to S601 described above, the network device may transmit the fifth configuration information on the third downlink carrier. The fifth configuration information is used to indicate a fifth uplink resource, where the fifth uplink resource is located in the second uplink carrier and is used to carry the first signal or the first information. The fifth configuration information may refer to the description related to the first configuration information in the foregoing embodiment, and the fifth uplink resource may refer to the description related to the first uplink resource in the foregoing embodiment.

The uplink resources configured by the network device for the SUL with the frequency point of 4.9GHz and the SUL with the frequency point of 3.5GHz and used for bearing the preamble sequence may be different, but in order to save the occupation of the uplink resources on the second uplink carrier in the embodiment of the present application, the uplink resources corresponding to the SUL with the frequency point of 4.9GHz and the SUL with the frequency point of 3.5GHz and used for bearing the preamble sequence may be the same. In this scenario, in order to distinguish downlink carriers corresponding to preamble sequences from the same resource, the first uplink resource and the fifth uplink resource configured by the network device may be different. When the first uplink resource and the fifth uplink resource are different, the network device may determine, according to the uplink resource carrying the first signal or the first information, that the downlink carrier of the terminal device sending the first signal or the first information, which is accessed to the network device, is the first downlink carrier or the third downlink carrier.

In order to further save the occupation of the uplink resource on the second uplink carrier, the first uplink resource and the fifth uplink resource may be the same. When the first uplink resource is the same as the fifth uplink resource, the first signal or the first information in this embodiment may also indicate that the terminal device accesses a downlink carrier of the network device, that is, when the terminal device accesses the network device with the SUL, the corresponding downlink carrier is the first downlink carrier or the third downlink carrier. For example, the first information may include an identifier of a downlink carrier for the terminal device to access the network device. It should be understood that, in this case, in the above embodiment, when the uplink resource for the network device to carry the first signal is a PRACH resource, because the information carried by the PRACH resource is limited, the first downlink carrier or the third downlink carrier may be indicated in sequence on the PRACH resource. When the network device is a PUSCH resource for the uplink resource carrying the first information, a bit may be divided in the PUSCH resource, and information indicating the first downlink carrier or the third downlink carrier is carried on the bit. The value of the bit has a corresponding relationship with the downlink carrier, for example, a first downlink carrier may be represented as 00 in the first information, and a third downlink carrier may be represented as 01. The system broadcast message or Msg2 may include a corresponding relationship between a bit value and a downlink carrier.

In this embodiment of the present application, the second uplink carrier may be an SUL corresponding to multiple frequency points, and the network device may configure different uplink resources for carrying the preamble sequence for the SUL corresponding to different frequency points. In order to save the occupation of the uplink resource of the second uplink carrier, the uplink resources for the same bearer preamble sequence may also be configured for SULs corresponding to different frequency points. In this scenario, the network device may configure different uplink resources for the SULs corresponding to different frequency points to carry the first signal or the first information, and in order to further save the uplink resources of the second uplink carrier, the network device may also configure the same uplink resources for the SULs corresponding to different frequency points to carry the first signal or the first information. When the network device configures the same uplink resources for the SULs corresponding to different frequency points and used for carrying the first signal or the first information, the first signal or the first information may indicate the first downlink carrier or the third downlink carrier accessed to the network device, so that the network device may communicate with the terminal device by using the corresponding downlink carriers.

Fig. 14 is a schematic structural diagram of an access device according to an embodiment of the present application. The access device according to this embodiment may be the network device described above, or may be a chip applied to a network device. The access device may be configured to perform the actions of the network device in the above method embodiments. As shown in fig. 14, the access device may include: a communication module 1401 and a processing module 1402. Wherein,

a communication module 1401, configured to send first configuration information on a first downlink carrier, where the first configuration information is used to indicate a first uplink resource, where the first uplink resource is located in a second uplink carrier, the second uplink carrier is a supplemental uplink SUL, and frequency points of the first uplink carrier and the second uplink carrier corresponding to the first downlink carrier are different.

A communication module 1401, configured to receive a first signal or first information from a terminal device on the first uplink resource.

A processing module 1402, configured to determine whether the terminal device accesses the network device on the first downlink carrier according to the first signal or the first information.

A communication module 1401, configured to send a downlink signal on the first downlink carrier when the terminal device accesses the network device on the first downlink carrier.

In one possible design, the first signal is a sequence, and the first uplink resource is used for carrying the sequence. A communication module 1401, configured to send second configuration information on the first downlink carrier, where the second configuration information is used to indicate a second uplink resource on the second uplink carrier, and the second uplink resource is used to carry a preamble sequence, where one preamble sequence carried by the second uplink resource corresponds to one sequence carried by the first uplink resource, or multiple preamble sequences carried by the second uplink resource correspond to one sequence carried by the first uplink resource.

The communication module 1401 is further configured to send third configuration information on the first downlink carrier, where the third configuration information is used to indicate a third uplink resource on the second uplink carrier, where the third uplink resource is used to carry a preamble sequence, and the first configuration information and the third configuration information are included in one configuration information; or,

the communication module 1401 is further configured to send the first configuration information on a second downlink carrier corresponding to the second uplink carrier, where the service data is a message three Msg 3.

In a possible design, the communication module 1401 is further configured to send fourth configuration information on a second downlink carrier corresponding to the second uplink carrier, where the fourth configuration information is used to indicate a fourth uplink resource on the second uplink carrier, and the fourth uplink resource is used to carry a preamble sequence.

In a possible design, the communication module 1401 is further configured to send fifth configuration information on a third downlink carrier, where the fifth configuration information is used to indicate a fifth uplink resource, the fifth uplink resource is located in the second uplink carrier, the fifth uplink resource is used to carry the first signal or the first information, and the third downlink carrier is different from the first downlink carrier in frequency point, where the first signal or the first information indicates that the terminal device accesses the network device on the first downlink carrier or the third downlink carrier.

The access device provided in the embodiment of the present application may perform the actions of the network device in the foregoing method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.

Fig. 15 is a schematic structural diagram of another access device according to an embodiment of the present application. The access device according to this embodiment may be the terminal device described above, or may be a chip applied to the terminal device. The access device may be configured to perform the actions of the terminal device in the foregoing method embodiments. As shown in fig. 15, the access device may include: a first communication module 1501 and a second communication module 1502. Wherein,

a first communication module 1501, configured to receive first configuration information on a first downlink carrier, where the first configuration information is used to indicate a first uplink resource, the first uplink resource is located in a second uplink carrier, the second uplink carrier is a supplemental uplink SUL, and a frequency point of the first uplink carrier and the second uplink carrier corresponding to the first downlink carrier are different.

A second communication module 1502, configured to send a first signal or first information on the first uplink resource, where the first signal or first information is used to indicate that the terminal device accesses a network device on the first downlink carrier.

The first communication module 1501 is further configured to receive second configuration information on the first downlink carrier, where the second configuration information is used to indicate a second uplink resource on the second uplink carrier, and the second uplink resource is used to carry a preamble sequence, where one preamble sequence carried by the second uplink resource corresponds to one sequence carried by the first uplink resource, or multiple preamble sequences carried by the second uplink resource correspond to one sequence carried by the first uplink resource.

A second communication module 1502, configured to send a preamble sequence on the second uplink resource, and send the sequence corresponding to the preamble sequence on the first uplink resource.

In a possible design, the first uplink resource is an uplink resource for carrying service data of the terminal device, and the first uplink resource is used for carrying the first information. The first communication module 1501 is further configured to receive third configuration information on the first downlink carrier, where the third configuration information is used to indicate a third uplink resource on the second uplink carrier, the third uplink resource is used to carry a preamble sequence, and the first configuration information and the third configuration information are included in one configuration information.

The access device provided in the embodiment of the present application may perform the actions of the terminal device in the foregoing method embodiment, and the implementation principle and the technical effect are similar, which are not described herein again.

It should be noted that the above communication module may be a transceiver or include a transmitter and a receiver when actually implemented. The processing module can be realized in the form of software called by the processing element; or may be implemented in hardware. For example, the processing module may be a processing element separately set up, or may be implemented by being integrated in a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and a function of the processing module may be called and executed by a processing element of the apparatus. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software. For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), etc. For another example, when some of the above modules are implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor that can call program code. As another example, these modules may be integrated together, implemented in the form of a system-on-a-chip (SOC).

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions according to the embodiments of the present application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wirelessly (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

Fig. 16 is a schematic structural diagram of an electronic device according to an embodiment of the present application. As shown in fig. 16, this may include: at least one processor 1601, communication circuitry 1602, memory 1603, and at least one communication interface 1604.

The processor 1601 may be a general processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more ics for controlling the execution of programs in accordance with the present disclosure. The communication lines 1602 may include a path for communicating information between the aforementioned components. Communication interface 1604 may use any transceiver or the like for communicating with other devices or communication networks, such as ethernet, RAN, Wireless Local Area Networks (WLAN), etc.

Memory 1603 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be separate and coupled to the processor via a communication line 1602. The memory may also be integral to the processor. The memory provided by the embodiment of the application can be generally nonvolatile. The memory 1603 is used for storing computer-executable instructions for executing the scheme of the application and is controlled by the processor 1601 to execute. The processor 1601 is configured to execute computer-executable instructions stored in the memory 1603 to implement the methods provided by the embodiments of the present application described below. Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application program codes, which are not specifically limited in the embodiments of the present application.

In particular implementations, processor 1601 may include one or more CPUs such as CPU0 and CPU1 in fig. 16, for example, as an embodiment. In particular implementations, a plurality of processors may be included, such as processor 1601 and processor 1607 in FIG. 16, for example, as an embodiment. Each of these processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions). In particular implementations, an output device 1605 and an input device 1606 may also be included as an embodiment. An output device 1605 is in communication with the processor 1601 and may display information in a variety of ways. For example, the output device 1605 may be a Liquid Crystal Display (LCD), a Light Emitting Diode (LED) display device, a Cathode Ray Tube (CRT) display device, a projector (projector), or the like. The input device 1606 is in communication with the processor 1601 and may receive user input in a variety of ways. For example, the input device 1606 may be a mouse, keyboard, touch screen device, or sensing device, among others.

In combination with the above, the present application also provides the following embodiments:

example 1: an access method applied to a network device, wherein the method comprises the following steps:

sending first configuration information on a first downlink carrier, where the first configuration information is used to indicate a first uplink resource, the first uplink resource is located on a second uplink carrier, the second uplink carrier is a supplemental uplink SUL, and frequency points of the first uplink carrier and the second uplink carrier corresponding to the first downlink carrier are different;

receiving a first signal or first information from a terminal device on the first uplink resource;

determining whether the terminal equipment accesses the network equipment on the first downlink carrier according to the first signal or the first information;

and when the terminal equipment accesses the network equipment on the first downlink carrier, sending a downlink signal on the first downlink carrier.

Embodiment 2 is the method according to embodiment 1, wherein the first signal is a sequence, and the first uplink resource is used for carrying the sequence, and the method further includes:

and sending second configuration information on the first downlink carrier, where the second configuration information is used to indicate a second uplink resource on the second uplink carrier, and the second uplink resource is used to carry a preamble sequence, where one preamble sequence carried by the second uplink resource corresponds to one sequence carried by the first uplink resource, or multiple preamble sequences carried by the second uplink resource correspond to one sequence carried by the first uplink resource.

Embodiment 3 and the method according to embodiment 2, wherein the first uplink resource is a PRACH resource.

Embodiment 4 is the method according to embodiment 2, wherein the sending the second configuration information on the first downlink carrier includes:

and sending a system broadcast message on the first downlink carrier, wherein the system broadcast message comprises the first configuration information and the second configuration information, and the system broadcast message comprises a leader sequence and a corresponding relation of the sequence.

Embodiment 5, the method according to embodiment 1, wherein the first uplink resource is an uplink resource for carrying service data of the terminal device, and the first uplink resource is used for carrying the first information;

the method further comprises the following steps:

sending third configuration information on the first downlink carrier, where the third configuration information is used to indicate a third uplink resource on the second uplink carrier, the third uplink resource is used to carry a preamble sequence, and the first configuration information and the third configuration information are included in one configuration information; or,

the method further comprises the following steps:

and sending the first configuration information on a second downlink carrier corresponding to the second uplink carrier, where the service data is a message three Msg 3.

Embodiment 6 or the method according to embodiment 5, wherein the sending third configuration information on the first downlink carrier includes:

and sending a system broadcast message on a first downlink carrier, wherein the system broadcast message comprises the first configuration information and third configuration information.

Embodiment 7 and the method according to embodiment 6, wherein a preamble sequence has a correspondence with an uplink resource carrying service data of the terminal device, and the system broadcast message includes the correspondence.

Embodiment 8 is the method according to embodiment 5, wherein the sending the first configuration information on the first downlink carrier includes:

sending a system broadcast message on a first downlink carrier, wherein the system broadcast message comprises the first configuration information;

the sending the first configuration information on the second downlink carrier corresponding to the second uplink carrier includes:

and sending a system broadcast message on a second downlink carrier, wherein the system broadcast message comprises the first configuration information.

Embodiment 9 the method of embodiment 1, wherein the method further comprises:

and sending fourth configuration information on a second downlink carrier corresponding to the second uplink carrier, where the fourth configuration information is used to indicate a fourth uplink resource on the second uplink carrier, and the fourth uplink resource is used to carry a preamble sequence.

Embodiment 10 and the method according to embodiment 1, wherein the sending fourth configuration information on a second downlink carrier corresponding to the second uplink carrier further includes:

and sending a system broadcast message on a second downlink carrier, wherein the fourth configuration information in the system broadcast message.

Embodiment 11, the method according to embodiment 9 or 10, wherein a second uplink resource and the fourth uplink resource occupy a same time-frequency code resource on the second uplink carrier; or the third uplink resource and the fourth uplink resource occupy the same time-frequency code resource on the second uplink carrier.

Embodiment 12, the method according to embodiment 9 or 10, wherein the first configuration information indicates a first uplink resource, and includes: the first configuration information indicates a code domain resource set corresponding to the first uplink resource, where the first uplink resource is used to carry the first signal, and the first signal is a preamble sequence; wherein, the preamble sequence in the code domain resource set is used to instruct the terminal device to access the network device on the first downlink carrier.

Embodiment 13 and the method according to embodiment 12, wherein the first uplink resource and the fourth uplink resource occupy the same time-frequency resource on the second uplink carrier.

Embodiment 14 and the method according to embodiment 12, wherein the first uplink resource and the fourth uplink resource occupy different time-frequency resources on the second uplink carrier.

Embodiment 15 the method of any of embodiments 1-14, wherein the method further comprises:

and sending fifth configuration information on a third downlink carrier, where the fifth configuration information is used to indicate a fifth uplink resource, the fifth uplink resource is located in the second uplink carrier, the fifth uplink resource is used to carry the first signal or the first information, and the frequency point of the third downlink carrier is different from that of the first downlink carrier.

Embodiment 16 and the method according to embodiment 15, wherein a fifth uplink resource is the same as the first uplink resource, and the first signal or the first information indicates that the terminal device accesses the network device on the first downlink carrier or the third downlink carrier.

Embodiment 17 the method of embodiment 15, wherein the fifth uplink resource is different from the first uplink resource.

Embodiment 18 and the method according to any of embodiments 1 to 17, wherein the frequency point corresponding to the second uplink carrier is lower than the frequency point corresponding to the first uplink carrier.

Embodiment 19 is an access method, applied to a terminal device, including:

receiving first configuration information on a first downlink carrier, where the first configuration information is used to indicate a first uplink resource, where the first uplink resource is located in a second uplink carrier, the second uplink carrier is a supplemental uplink SUL, and a frequency point of the first uplink carrier and the second uplink carrier corresponding to the first downlink carrier are different;

and sending a first signal or first information on the first uplink resource, where the first signal or first information is used to indicate that the terminal device accesses the network device on the first downlink carrier.

Embodiment 20 and the method according to embodiment 19, wherein the first signal is a sequence, and the first uplink resource is used to carry the sequence, and the method further includes:

receiving second configuration information on the first downlink carrier, where the second configuration information is used to indicate a second uplink resource on the second uplink carrier, and the second uplink resource is used to carry a preamble sequence, where one preamble sequence carried by the second uplink resource corresponds to one sequence carried by the first uplink resource, or multiple preamble sequences carried by the second uplink resource correspond to one sequence carried by the first uplink resource;

the sending the first signal or the first information on the first uplink resource includes:

and sending a leader sequence on the second uplink resource, and sending the sequence corresponding to the leader sequence on the first uplink resource.

Embodiment 21 and the method according to embodiment 19, wherein the first uplink resource is an uplink resource for carrying service data of the terminal device, and the first uplink resource is used for carrying the first information;

the method further comprises the following steps:

receiving third configuration information on the first downlink carrier, where the third configuration information is used to indicate a third uplink resource on the second uplink carrier, the third uplink resource is used to carry a preamble sequence, and the first configuration information and the third configuration information are included in one configuration information.

Embodiment 22 and the method according to embodiment 21, wherein the transmitting a first signal or first information on the first uplink resource includes:

and transmitting the preamble sequence on the third uplink resource, and transmitting the first information and the service data on the first uplink resource.

Embodiment 23 and the method according to embodiment 19, wherein the first uplink resource is an uplink resource for carrying service data of the terminal device, the first uplink resource is used for carrying the first information, and the service data is a message three Msg 3.

Embodiment 24 and the method according to embodiment 23, wherein the transmitting a first signal or first information on the first uplink resource includes:

and sending the Msg3 on the first uplink resource, wherein the Msg3 comprises the first message.

Embodiment 25 and the method according to embodiment 19, wherein the indicating the first uplink resource by the first configuration information includes: the first configuration information indicates a code domain resource set corresponding to the first uplink resource, where the first uplink resource is used to carry the first signal, and the first signal is a preamble sequence, where the preamble sequence in the code domain resource set is used to indicate that the terminal device accesses the network device on the first downlink carrier.

Embodiment 26 and the method according to embodiment 25, wherein the transmitting a first signal or first information on the first uplink resource includes:

and sending a leader sequence in a code domain resource set corresponding to the first uplink resource, wherein the leader sequence in the code domain resource set is used for indicating the terminal equipment to access the network equipment in the first downlink carrier.

Example 27: an access apparatus, which may be a network device or a chip or a system on a chip in a network device, includes: a processor and a memory, the memory storing instructions that, when executed by the processor, cause the access device to perform the steps of: sending first configuration information on a first downlink carrier, where the first configuration information is used to indicate a first uplink resource, the first uplink resource is located on a second uplink carrier, the second uplink carrier is a supplemental uplink SUL, and frequency points of the first uplink carrier and the second uplink carrier corresponding to the first downlink carrier are different;

Embodiment 28 and the apparatus according to embodiment 27, wherein the first signal is a sequence, the first uplink resource is used to carry the sequence, and the access apparatus may further perform the following steps:

The embodiment 29 and the apparatus according to the embodiment 28, wherein the first uplink resource is a PRACH resource.

Embodiment 30 the apparatus of embodiment 28, wherein the access apparatus may further perform the following steps:

Embodiment 31 and the apparatus according to embodiment 27, wherein the first uplink resource is an uplink resource for carrying service data of the terminal device, and the first uplink resource is used for carrying the first information;

the access device may further perform the steps of:

Embodiment 32 the apparatus of embodiment 31, wherein the access apparatus may further perform the following steps: and sending a system broadcast message on a first downlink carrier, wherein the system broadcast message comprises the first configuration information and third configuration information.

Embodiment 33 and the apparatus according to embodiment 32, wherein a preamble sequence has a correspondence with an uplink resource carrying service data of the terminal device, and the system broadcast message includes the correspondence.

Embodiment 34 the apparatus of embodiment 31, wherein the access apparatus may further perform the following steps: sending a system broadcast message on a first downlink carrier, wherein the system broadcast message comprises the first configuration information;

Embodiment 35 the apparatus of embodiment 27, wherein the access apparatus may further perform the following steps: and sending fourth configuration information on a second downlink carrier corresponding to the second uplink carrier, where the fourth configuration information is used to indicate a fourth uplink resource on the second uplink carrier, and the fourth uplink resource is used to carry a preamble sequence.

Embodiment 36 the apparatus of embodiment 27, wherein the access apparatus may further perform the following steps: and sending a system broadcast message on a second downlink carrier, wherein the fourth configuration information in the system broadcast message.

Embodiment 37, the apparatus according to embodiment 35 or 36, wherein a second uplink resource and the fourth uplink resource occupy a same time-frequency code resource on the second uplink carrier; or the third uplink resource and the fourth uplink resource occupy the same time-frequency code resource on the second uplink carrier.

Embodiment 38, the apparatus according to embodiment 35 or 36, wherein the first configuration information indicates a first uplink resource, and the apparatus includes: the first configuration information indicates a code domain resource set corresponding to the first uplink resource, where the first uplink resource is used to carry the first signal, and the first signal is a preamble sequence; wherein, the preamble sequence in the code domain resource set is used to instruct the terminal device to access the network device on the first downlink carrier.

The embodiment 39 and the apparatus according to the embodiment 38, wherein the first uplink resource and the fourth uplink resource occupy the same time-frequency resource on the second uplink carrier.

Embodiment 40 the apparatus according to embodiment 38, wherein the first uplink resource and the fourth uplink resource occupy different time-frequency resources on the second uplink carrier.

Embodiment 41 the apparatus of any of embodiments 27-40, wherein the access apparatus is further capable of performing the following steps: and sending fifth configuration information on a third downlink carrier, where the fifth configuration information is used to indicate a fifth uplink resource, the fifth uplink resource is located in the second uplink carrier, the fifth uplink resource is used to carry the first signal or the first information, and the frequency point of the third downlink carrier is different from that of the first downlink carrier.

Embodiment 42 the apparatus of embodiment 41, wherein a fifth uplink resource is the same as the first uplink resource, and the first signal or the first information indicates that the terminal device accesses the network device on the first downlink carrier or the third downlink carrier.

Embodiment 43 the apparatus of embodiment 41, wherein the fifth uplink resource is different from the first uplink resource.

Embodiment 44 and an apparatus according to any of embodiments 27 to 43, wherein a frequency point corresponding to the second uplink carrier is lower than a frequency point corresponding to the first uplink carrier.

Embodiment 45, an access apparatus, where the access apparatus may be a terminal device or a chip or a system on a chip in the terminal device, and the access apparatus includes: a processor and a memory, the memory storing instructions that, when executed by the processor, cause the access device to perform the steps of: the method comprises the following steps: receiving first configuration information on a first downlink carrier, where the first configuration information is used to indicate a first uplink resource, where the first uplink resource is located in a second uplink carrier, the second uplink carrier is a supplemental uplink SUL, and a frequency point of the first uplink carrier and the second uplink carrier corresponding to the first downlink carrier are different;

Embodiment 46 and the apparatus according to embodiment 45, wherein the first signal is a sequence, the first uplink resource is used to carry the sequence, and the access apparatus performs the following steps: receiving second configuration information on the first downlink carrier, where the second configuration information is used to indicate a second uplink resource on the second uplink carrier, and the second uplink resource is used to carry a preamble sequence, where one preamble sequence carried by the second uplink resource corresponds to one sequence carried by the first uplink resource, or multiple preamble sequences carried by the second uplink resource correspond to one sequence carried by the first uplink resource;

Embodiment 47 and the apparatus according to embodiment 45, wherein the first uplink resource is an uplink resource for carrying service data of the terminal device, and the first uplink resource is used for carrying the first information;

the access device performs the following steps: receiving third configuration information on the first downlink carrier, where the third configuration information is used to indicate a third uplink resource on the second uplink carrier, the third uplink resource is used to carry a preamble sequence, and the first configuration information and the third configuration information are included in one configuration information.

Embodiment 48 the apparatus of embodiment 47, wherein the access device performs the steps of: and transmitting the preamble sequence on the third uplink resource, and transmitting the first information and the service data on the first uplink resource.

Embodiment 49 of the apparatus according to embodiment 47, wherein the first uplink resource is an uplink resource that carries service data of the terminal device, the first uplink resource is used to carry the first information, and the service data is a message three Msg 3.

Embodiment 50 the apparatus of embodiment 49, wherein the access apparatus performs the steps of: and sending the Msg3 on the first uplink resource, wherein the Msg3 comprises the first message.

Embodiment 51 and the apparatus of embodiment 45, wherein the first configuration information indicates a first uplink resource, and the apparatus includes: the first configuration information indicates a code domain resource set corresponding to the first uplink resource, where the first uplink resource is used to carry the first signal, and the first signal is a preamble sequence, where the preamble sequence in the code domain resource set is used to indicate that the terminal device accesses the network device on the first downlink carrier.

Embodiment 52 the apparatus of embodiment 51, wherein the access apparatus performs the steps of: and sending a leader sequence in a code domain resource set corresponding to the first uplink resource, wherein the leader sequence in the code domain resource set is used for indicating the terminal equipment to access the network equipment in the first downlink carrier.

Embodiment 53, an access device, comprising: a communication module and a processing module;

the communication module is configured to send first configuration information on a first downlink carrier, where the first configuration information is used to indicate a first uplink resource, where the first uplink resource is located on a second uplink carrier, the second uplink carrier is a supplemental uplink SUL, and frequency points of the first uplink carrier and the second uplink carrier corresponding to the first downlink carrier are different;

the communication module is further configured to receive a first signal or first information from a terminal device on the first uplink resource;

the processing module is configured to determine whether the terminal device accesses the network device on the first downlink carrier according to the first signal or the first information;

the communication module is further configured to send a downlink signal on the first downlink carrier when the terminal device accesses the network device on the first downlink carrier.

Embodiment 54 is the apparatus according to embodiment 53, wherein the first signal is a sequence, the first uplink resource is used to carry the sequence, the communication module is further configured to send second configuration information on the first downlink carrier, the second configuration information is used to indicate a second uplink resource on the second uplink carrier, and the second uplink resource is used to carry a preamble sequence, where one preamble sequence carried by the second uplink resource corresponds to one sequence carried by the first uplink resource or multiple preamble sequences carried by the second uplink resource correspond to one sequence carried by the first uplink resource.

The embodiment 55 is the apparatus according to embodiment 54, wherein the first uplink resource is a PRACH resource.

Embodiment 56 the apparatus according to embodiment 54, wherein the communication module is further configured to send a system broadcast message on the first downlink carrier, where the system broadcast message includes the first configuration information and the second configuration information, and the system broadcast message includes a preamble sequence and a sequence corresponding relationship.

Embodiment 57 the apparatus according to embodiment 53, wherein the first uplink resource is an uplink resource for carrying service data of the terminal device, and the first uplink resource is used for carrying the first information;

Embodiment 58 the apparatus of embodiment 57, wherein the communication module is further configured to send a system broadcast message on a first downlink carrier, and the system broadcast message includes the first configuration information and the third configuration information.

Embodiment 59 of the apparatus according to embodiment 58, wherein a preamble sequence has a correspondence with an uplink resource carrying service data of the terminal device, and the system broadcast message includes the correspondence.

Embodiment 60 the apparatus of embodiment 57, wherein the communication module is further configured to send a system broadcast message on a first downlink carrier, where the system broadcast message includes the first configuration information;

Embodiment 61 the apparatus according to embodiment 53, wherein the communication module is further configured to send fourth configuration information on a second downlink carrier corresponding to the second uplink carrier, where the fourth configuration information is used to indicate a fourth uplink resource on the second uplink carrier, and the fourth uplink resource is used to carry a preamble sequence.

Embodiment 62 the apparatus of embodiment 53, wherein the communication module is further configured to send a system broadcast message on the second downlink carrier, where the system broadcast message includes fourth configuration information.

Embodiment 63, the apparatus of embodiment 61 or 62, wherein a second uplink resource and the fourth uplink resource occupy a same time-frequency code resource on the second uplink carrier; or the third uplink resource and the fourth uplink resource occupy the same time-frequency code resource on the second uplink carrier.

Embodiment 64 the apparatus according to embodiment 61 or 62, wherein the first configuration information indicates a first uplink resource, and the apparatus includes: the first configuration information indicates a code domain resource set corresponding to the first uplink resource, where the first uplink resource is used to carry the first signal, and the first signal is a preamble sequence; wherein, the preamble sequence in the code domain resource set is used to instruct the terminal device to access the network device on the first downlink carrier.

The embodiment 65 and the apparatus according to the embodiment 64, wherein the first uplink resource and the fourth uplink resource occupy the same time-frequency resource on the second uplink carrier.

Embodiment 66 and the apparatus of embodiment 64, wherein the first uplink resource and the fourth uplink resource occupy different time-frequency resources on the second uplink carrier.

Embodiment 67 and the apparatus according to any of embodiments 53 to 66, wherein the communication module is further configured to send fifth configuration information on a third downlink carrier, where the fifth configuration information is used to indicate a fifth uplink resource, the fifth uplink resource is located in the second uplink carrier, the fifth uplink resource is used to carry the first signal or the first information, and a frequency point of the third downlink carrier is different from a frequency point of the first downlink carrier.

Embodiment 68 the apparatus of embodiment 67, wherein the fifth uplink resource is the same as the first uplink resource, and the first signal or the first information indicates that the terminal device accesses the network device on the first downlink carrier or the third downlink carrier.

Embodiment 69 the apparatus of embodiment 67, wherein the fifth uplink resource is different from the first uplink resource.

Embodiment 70 and the apparatus according to any of embodiments 53 to 69, wherein the frequency point corresponding to the second uplink carrier is lower than the frequency point corresponding to the first uplink carrier.

Embodiment 71, an access device, comprising: a first communication module and a second communication module; wherein,

a first communication module, configured to receive first configuration information on a first downlink carrier, where the first configuration information is used to indicate a first uplink resource, where the first uplink resource is located in a second uplink carrier, the second uplink carrier is a supplemental uplink SUL, and a frequency point of the first uplink carrier and the second uplink carrier corresponding to the first downlink carrier are different;

a second communication module, configured to send a first signal or first information on the first uplink resource, where the first signal or the first information is used to indicate that the terminal device accesses the network device on the first downlink carrier.

Embodiment 72 is the apparatus of embodiment 71, wherein the first signal is a sequence, the first uplink resource is used for carrying the sequence, the first communication module is further configured to receive second configuration information on the first downlink carrier, the second configuration information is used for indicating a second uplink resource on the second uplink carrier, and the second uplink resource is used for carrying a preamble sequence, where one preamble sequence of the second uplink resource carrier corresponds to one sequence of the first uplink resource carrier, or multiple preamble sequences of the second uplink resource carrier correspond to one sequence of the first uplink resource carrier;

the second communication module is further configured to send a preamble sequence on the second uplink resource, and send the sequence corresponding to the preamble sequence on the first uplink resource.

Embodiment 73 and the apparatus of embodiment 71, wherein the first uplink resource is an uplink resource for carrying service data of the terminal device, and the first uplink resource is used for carrying the first information;

the first communication module is further configured to receive third configuration information on the first downlink carrier, where the third configuration information is used to indicate a third uplink resource on the second uplink carrier, the third uplink resource is used to carry a preamble sequence, and the first configuration information and the third configuration information are included in one configuration information.

The embodiment 74 is the apparatus according to embodiment 73, wherein the second communication module is further configured to send the preamble sequence on a third uplink resource, and send the first information and the service data on the first uplink resource.

Embodiment 75 is the apparatus of embodiment 71, wherein the first uplink resource is an uplink resource for carrying service data of the terminal device, the first uplink resource is used for carrying the first information, and the service data is a message three Msg 3.

Embodiment 76 the apparatus of embodiment 75, wherein the second communication module is further configured to send Msg3 on the first uplink resource, the Msg3 including the first message.

Embodiment 77 or the apparatus of embodiment 71, wherein the first configuration information indicates a first uplink resource, and the apparatus includes: the first configuration information indicates a code domain resource set corresponding to the first uplink resource, where the first uplink resource is used to carry the first signal, and the first signal is a preamble sequence, where the preamble sequence in the code domain resource set is used to indicate that the terminal device accesses the network device on the first downlink carrier.

The embodiment 78, the apparatus according to embodiment 77, wherein the second communication module is further configured to send a preamble sequence in a code domain resource set corresponding to the first uplink resource, where the preamble sequence in the code domain resource set is used to instruct the terminal device to access the network device in the first downlink carrier.

Embodiment 79 is a computer program product which, when run on a computer, causes the computer to perform the method according to any of embodiments 1 to 26 above.

Embodiment 80, a computer-readable storage medium having stored thereon instructions that, when executed on a computer, cause the computer to perform the method of any of embodiments 1-26 above.

Embodiment 81, a chip comprising a processor, the processor being configured to perform the method according to any of embodiments 1 to 26 when the processor executes instructions. The instructions may come from memory internal to the chip or from memory external to the chip. Optionally, the chip further comprises an input-output circuit.

While the present application has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Claims

1. An access method applied to a network device, the method comprising:

2. The method of claim 1, wherein the first signal is a sequence, and wherein the first uplink resource is used for carrying the sequence, the method further comprising:

3. The method according to claim 1, wherein the first uplink resource is an uplink resource for carrying service data of the terminal device, and the first uplink resource is used for carrying the first information;

the method further comprises the following steps:

4. The method of claim 1, further comprising:

5. The method of claim 4,

the second uplink resource and the fourth uplink resource occupy the same time-frequency code resource on the second uplink carrier; or the third uplink resource and the fourth uplink resource occupy the same time-frequency code resource on the second uplink carrier.

6. The method of claim 4, wherein the first configuration information indicates a first uplink resource, and wherein the first configuration information comprises: the first configuration information indicates a code domain resource set corresponding to the first uplink resource, where the first uplink resource is used to carry the first signal, and the first signal is a preamble sequence;

wherein, the preamble sequence in the code domain resource set is used to instruct the terminal device to access the network device on the first downlink carrier.

7. The method according to claim 6, wherein the first uplink resource and the fourth uplink resource occupy the same time-frequency resource on the second uplink carrier.

8. The method of claim 6, wherein the first uplink resource and the fourth uplink resource occupy different time-frequency resources on the second uplink carrier.

9. The method according to any one of claims 1-8, further comprising:

and sending fifth configuration information on a third downlink carrier, where the fifth configuration information is used to indicate a fifth uplink resource, the fifth uplink resource is located in the second uplink carrier, the fifth uplink resource is used to carry the first signal or the first information, and the third downlink carrier has a different frequency point from the first downlink carrier, where the first signal or the first information indicates that the terminal device accesses the network device on the first downlink carrier or the third downlink carrier.

10. An access method applied to a terminal device includes:

11. The method of claim 10, wherein the first signal is a sequence, and wherein the first uplink resource is used for carrying the sequence, the method further comprising:

12. The method of claim 10, wherein the first uplink resource is an uplink resource for carrying service data of the terminal device, and the first uplink resource is used for carrying the first information;

the method further comprises the following steps:

13. The method of claim 10, wherein the first uplink resource is an uplink resource for carrying service data of the terminal device, the first uplink resource is used for carrying the first message, and the service data is a message three Msg 3.

14. The method of claim 10, wherein the first configuration information indicates a first uplink resource, and wherein the first configuration information comprises: the first configuration information indicates a code domain resource set corresponding to the first uplink resource, where the first uplink resource is used to carry the first signal, and the first signal is a preamble sequence, where the preamble sequence in the code domain resource set is used to indicate that the terminal device accesses the network device on the first downlink carrier.

15. A network device, comprising:

a communication module, configured to send first configuration information on a first downlink carrier, and receive a first signal or first information from a terminal device on a first uplink resource, where the first configuration information is used to indicate the first uplink resource, the first uplink resource is located in a second uplink carrier, the second uplink carrier is a supplemental uplink SUL, and frequency points of the first uplink carrier and the second uplink carrier corresponding to the first downlink carrier are different;

a processing module, configured to determine whether the terminal device accesses the network device on the first downlink carrier according to the first signal or the first information;

16. A terminal device, comprising:

17. An electronic device, comprising: a memory, a processor, and a transceiver;

the processor is used for being coupled with the memory, reading and executing the instructions in the memory to realize the method of any one of claims 1 to 14;

the transceiver is coupled to the processor, and the processor controls the transceiver to transmit and receive messages.

18. A computer-readable storage medium having computer instructions stored thereon which, when executed by a computer, cause the computer to perform the method of any of claims 1-14.