WO2023051324A1

WO2023051324A1 - Random access preamble transmitting method, random access preamble receiving method, and communication apparatus

Info

Publication number: WO2023051324A1
Application number: PCT/CN2022/119962
Authority: WO
Inventors: 侯海龙; 金哲; 罗之虎; 王轶
Original assignee: 华为技术有限公司
Priority date: 2021-09-28
Filing date: 2022-09-20
Publication date: 2023-04-06
Also published as: CN115884394A

Abstract

The present application discloses a random access preamble transmitting method, a random access preamble receiving method, and a communication apparatus. The random access preamble receiving method comprises: a network device transmits first configuration information to a terminal device, wherein the first configuration information indicates a correspondence between a first SSB set and a first RO set, the first RO set comprises ROs located in a first BWP corresponding to a first-type terminal device in a second RO set, and the second RO set is located in a second BWP corresponding to a second-type terminal device; and the first-type terminal device transmits a random access preamble on the basis of the first RO set. In the solution, the network device can respectively and independently configure a correspondence between an SSB set and an RO set for different types of terminal devices, so that the ROs in the correspondence between the SSB set and the RO set configured by one type of terminal device all are within a maximum bandwidth range supported by the terminal device. Regardless of which SSB selected by the terminal device, the determined RO can be used, thereby reducing the number of times of failure of random access, and improving the efficiency of accessing a network.

Description

Sending method, receiving method and communication device of a random access preamble

Cross References to Related Applications

This application claims the priority of the Chinese patent application submitted to the China Patent Office on September 28, 2021, with the application number 202111144177.5, and the application name "a random access preamble transmission method, reception method, and communication device", all of which The contents are incorporated by reference in this application.

technical field

The present application relates to the technical field of random access, and in particular to a sending method, a receiving method and a communication device of a random access preamble.

Background technique

In order to realize data transmission between the terminal device and the network device, the terminal device establishes a connection with the network device through a random access process. When performing a random access process, the terminal device will send a random access preamble to the network device to initiate the random access process. Before the terminal device initiates the random access process, it can select an SSB from multiple synchronization signal and physical broadcast channel (physical broadcast channel, PBCH) block (synchronization signal and PBCH block) SSBs, and in the random access associated with the SSB A random access preamble is sent on a random access channel occasion (RO).

At present, 8 ROs can be multiplexed in the frequency domain, and all multiplexable ROs should be located in the bandwidth part (bandwidth part, BWP) configured for the terminal device, and the bandwidth of the BWP does not include the maximum bandwidth of the terminal device. For example, with diversification of services, two types of terminal equipment with different capabilities may exist in a system, such as common terminal equipment and machine-type terminal equipment. Compared with ordinary terminal equipment, machine-type terminal equipment has weaker capabilities and can be applied to services that do not require high data transmission rates. Common terminal devices and machine-type terminal devices support different maximum bandwidths. The total bandwidth of the RO applicable to ordinary terminal equipment may exceed the maximum bandwidth of the machine type terminal equipment. If the RO associated with the SSB selected by the machine-type terminal device is just outside the maximum bandwidth supported by the machine-type terminal device, it is obviously impossible to use the RO to initiate random access, resulting in the machine-type terminal device being unable to access the network. Therefore, how to configure the random access resources of the terminal equipment has become a technical problem that needs to be solved urgently.

Contents of the invention

The present application provides a random access preamble sending method, receiving method, and communication device, so as to reduce random access failures of terminal equipment and improve network access efficiency of terminal equipment.

The first aspect provides a method for sending a random access preamble that can be executed by a first communication device. The first communication device may be a communication device or a communication device capable of supporting the communication device to implement functions required by the method, such as a chip system. The following description is made by taking the communication device as a first terminal device and the first terminal device as a first-type terminal device as an example. The method includes: the terminal device receives first configuration information from the network device, where the first configuration information is used to indicate a first correspondence between the first SSB set and the first RO set, and the first RO set includes the second RO set RO located in the first BWP. The first BWP corresponds to the first type of terminal device, the second RO set is located in the second BWP, and the second BWP corresponds to the second type of terminal device. The terminal device sends a random access preamble to the network device based on the first RO set, and the terminal device is a first type of terminal device.

In this embodiment of the present application, the network device can independently configure the corresponding relationship between the SSB set and the RO set for different types of terminal devices according to the type of the terminal device (or the maximum supported bandwidth). For example, there are a first type of terminal device and a second type of terminal device, the BWP of the first type of terminal device is the first BWP, and the BWP of the second type of terminal device is the second BWP. The network device can configure the ROs included in the second RO set configured for the second type of terminal device to be located in the second BWP, and the ROs included in the first RO set configured for the first type of terminal device are all located in the first BWP, for example, the first RO The set consists of ROs located in the first BWP in the second RO set. That is, the ROs in the corresponding relationship between the SSB set and the RO set configured for a certain type of terminal equipment are all within the maximum bandwidth supported by this type of terminal equipment. In this way, no matter which SSB is selected by this type of terminal equipment, the RO determined according to the selected SSB can be used, so as to reduce the number of random access failures and improve the efficiency of accessing the network.

In a possible implementation manner, the second corresponding relationship between the second RO set and the second SSB set is configured by the second configuration information. It can be understood that the network device may configure the second corresponding relationship for the second type of terminal device through signaling.

In a possible implementation manner, the first correspondence indicates that M SSBs are mapped to one RO, and the second correspondence indicates that N SSBs are mapped to one RO, and N and M are different. This solution can follow the current way of configuring the corresponding relationship between the SSB set and the RO set, that is, N SSBs can be configured to map to one RO for the second type of terminal equipment. Similarly, for the first type of terminal equipment, the current method of configuring the corresponding relationship between the SSB set and the RO set can still be used. The difference is that the first corresponding relationship is that M SSBs are mapped to 1 RO, so that the first RO All ROs included in the set are located in the first BWP. This solution does not need to modify the signaling structure carrying the first configuration information and the second configuration information, and is more compatible with the current signaling structure.

In a possible implementation manner, the first configuration information includes the number P of ROs included in the first RO set, and the first correspondence indicates that Q SSBs are mapped to P ROs. Wherein, Q is the number of SSBs included in the second SSB set, Q SSBs correspond to Q random access preamble sets one by one, and these Q random access preamble sets are at least one random access preamble associated with P ROs. composed of input preamble. This scheme stipulates that all random access preambles corresponding to the first RO set are grouped according to the number Q of SSBs included in the second SSB set, that is, all random access preambles included in the first RO set are divided into Q random access preambles. Enter the preamble set. There is a one-to-one correspondence between the Q SSBs and the Q preamble sets with random access. Since the first RO set corresponds to Q random access preamble sets, that is, the P ROs included in the first RO set have a corresponding relationship with the Q random access preamble sets. Therefore, the network device and the terminal device may determine the correspondence between the P ROs and the Q SSBs based on the correspondence between the P ROs and the Q sets with random access preambles in the first RO set. This solution does not limit the value of M, that is, no matter what value M is, all ROs in the first RO set can have associated SSBs, thereby improving RO utilization.

In a possible implementation manner, the first time unit and the second time unit correspond to different first RO sets. In this solution, the first RO set that is allowed to be used by the first type of terminal device in different time units is different, that is, the ROs included in the first RO set may change in different time units. Since the ROs included in the first RO set change in different time units, it is possible to avoid the impact of the first type of terminal equipment on the second type of terminal equipment with fixed SSB beam directions associated with certain ROs, thereby balancing the first type Random access performance of terminal equipment and second-class terminal equipment.

In a possible implementation manner, in the first period, the index index of the starting RO in the first RO set satisfies:

index=floor((SFN*10+subframe)/Period)mod X, where X is the number of ROs included in the first RO set, SFN is the frame number of the system frame where the starting RO is located, and subframe is the starting RO The frame number of the system subframe where the initial RO is located, and Period is the first period. This solution provides an implementation mode in which the first RO sets corresponding to different time units are different, that is, by constraining the index of the starting RO of the first RO set in each PRACH cycle, the first RO sets are different in different cycles.

In a possible implementation manner, the method further includes: the terminal device sends first capability information to the network device, where the first capability information is used to indicate whether the terminal device supports not including the SSB in the BWP. In this solution, the terminal device notifies the network device through the first capability information whether the terminal device supports BWP that does not contain SSB, so that the network device and the terminal device can work on the same BWP for the terminal device, and avoids the possibility that the terminal device does not support the BWP. When the SSB is included, the network device configures the terminal device with a BWP that does not contain the SSB, or the network device transmits data to the terminal device through the BWP that does not contain the SSB.

In a possible implementation manner, the first capability information is reported through the preamble used in the random access message 1 or through the RO resource used in the random access message 1; or, the first capability information is reported through the random access message 3; Alternatively, the first capability information is reported through a physical uplink control channel (physical uplink control channel, PUCCH) resource that carries hybrid automatic repeat request acknowledgment (hybrid automatic repeat request-acknowledgment, HARQ-ACK) feedback information for random access message 4 . This solution provides multiple implementation forms of the first capability information, and the specific implementation form used is not limited by the embodiments of the present application, and is relatively flexible.

The second aspect provides a method for receiving a random access preamble that can be executed by a second communication device. The second communication device can be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip system. The following description is made by taking the communication device as a network device as an example. The method includes:

The network device sends the first configuration information and the second configuration information. Wherein, the first configuration information is used to indicate the first corresponding relationship between the first SSB set and the first RO set, and the second configuration information is used to indicate the second corresponding relationship between the second SSB set and the second RO set. The first RO set includes ROs located in the first BWP in the second RO set, the first BWP corresponds to the first type of terminal device, the second RO set is located in the second BWP, and the second BWP corresponds to the second type of terminal device. Afterwards, the network device receives the random access preamble from the terminal device based on the first RO set, and the terminal device belongs to the first type of terminal device.

In a possible implementation manner, the first RO set is composed of ROs in the second RO set located in the first BWP.

In a possible implementation manner, the first correspondence indicates that M SSBs are mapped to one RO, and the second correspondence indicates that N SSBs are mapped to one RO, and N and M are different.

In a possible implementation manner, the first configuration information includes the number P of ROs included in the first RO set, and the first correspondence indicates that Q SSBs are mapped to P ROs. Q is the number of SSBs included in the second RO set, Q SSBs correspond to Q random access preamble sets one by one, and these Q random access preamble sets are at least one random access preamble associated with P ROs composed of codes.

In a possible implementation manner, the first time unit and the second time unit correspond to different first RO sets.

In a possible implementation manner, in the first cycle, the index index of the starting RO in the first RO set satisfies:

index=floor((SFN*10+subframe)/Period)mod X, where X is the number of ROs included in the first RO set, SFN is the frame number of the system frame where the starting RO is located, and subframe is the starting RO The frame number of the system subframe where the initial RO is located, and Period is the first period.

In a possible implementation manner, the method further includes: the network device receiving first capability information from the terminal device, where the first capability information is used to indicate whether the terminal device supports not including the SSB in the BWP.

In a possible implementation, the first capability information is reported through the preamble used by the random access message 1 or the RO resource used by the random access message 1; or, the first capability information is reported through the random access message 3; or, The first capability information is reported through the BWP where the PDCCH carrying the HARQ-ACK feedback information for the random access message 4 is located.

Regarding the technical effects brought about by the second aspect or various possible implementations of the second aspect, reference may be made to the introduction of the first aspect or the technical effects of various implementations of the first aspect, which will not be repeated here.

The third aspect provides a method for sending a random access preamble that can be executed by a first communication device. The first communication device may be a communication device or a communication device capable of supporting the communication device to implement functions required by the method, such as a chip system. The following description is made by taking the communication device as a terminal device as an example. The method includes:

The terminal device receives second indication information from the network device, where the second indication information is used to indicate that the PUCCH resource does not perform frequency hopping transmission within a slot or frequency hopping transmission between slots, and the PUCCH resource is used by the terminal device to send a message for random access. HARQ-ACK feedback information of incoming message 4 (or random access message B). The random access message 4 or the random access message B may be used to carry the random access conflict resolution identifier, the RRC connection establishment message, and the like. Afterwards, the terminal device sends HARQ-ACK feedback information for random access message 4 (or random access message B) on the PUCCH resource according to the second indication information.

In a possible implementation, the second indication information indicates that the PUCCH resource does not perform frequency hopping transmission within a time slot, and the BWP configured with the PUCCH resource is located on one side of the configured carrier bandwidth of the terminal device. For the PUCCH resource r _PUCCH , the PRB position for transmitting the PUCCH resource satisfies:

Wherein, r _PUCCH is the PUCCH resource index, Ncs is the number of cyclic shifts of the common PUCCH resource set,

is the frequency domain offset value of the common PUCCH resource set.

In a possible implementation, the second indication information indicates that the PUCCH resource does not perform frequency hopping transmission within a time slot, and the first uplink BWP and the second uplink BWP configured with the PUCCH resource are respectively located in the configured carrier bandwidth of the terminal device On both sides of the PUCCH resource r _PUCCH , the PRB position for transmitting the PUCCH resource satisfies:

if

Using the PUCCH resource in the first uplink BWP, the PRB position for transmitting PUCCH satisfies:

if

Using the PUCCH resources in the second uplink BWP, the PRB position for transmitting the PUCCH satisfies:

Among them, r _PUCCH is the PUCCH resource index, N _CS is the number of cyclic shifts of the common PUCCH resource set,

is the frequency domain offset value of the common PUCCH resource set,

is the size of the second uplink BWP (number of PRBs).

In a possible implementation manner, the second indication information indicates that the PUCCH resources are repeated between time slots and frequency hopping transmission between time slots, and the first uplink BWP and the second uplink BWP configured with the PUCCH resources are located at the terminal device configured On both sides of the carrier bandwidth, for the PUCCH resource r _PUCCH , the PRB position for transmitting the PUCCH resource satisfies:

if

The first-hop PUCCH uses the PUCCH resources in the first uplink BWP, and the PRB position for transmitting the PUCCH satisfies:

The second-hop PUCCH uses the PUCCH resources in the second uplink BWP, and the PRB position for transmitting the PUCCH satisfies:

is the frequency domain offset value of the common PUCCH resource set,

is the size of the second initial uplink BWP (number of PRBs).

if

The first-hop PUCCH uses the PUCCH resources in the second uplink BWP, and the PRB position for transmitting the PUCCH satisfies:

The second-hop PUCCH uses the PUCCH resources in the first uplink BWP, and the PRB position for transmitting the PUCCH satisfies:

is the frequency domain offset value of the common PUCCH resource set,

is the size of the second uplink BWP (number of PRBs).

if

is the frequency domain offset value of the common PUCCH resource set.

if

is the frequency domain offset value of the common PUCCH resource set.

The fourth aspect provides a random access preamble sending method that can be executed by a first communication device. The first communication device may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip system. The following description is made by taking the communication device as a network device as an example. The method includes:

The network device sends second indication information to the terminal device, where the second indication information is used to instruct the PUCCH resource not to perform frequency hopping transmission within a time slot or frequency hopping transmission between time slots, the PUCCH resource is used by the terminal device to send information for random access HARQ-ACK feedback information of message 4 (or random access message B). The random access message 4 or the random access message B may be used to carry the random access conflict resolution identifier, the RRC connection establishment message, and the like. Afterwards, the network device receives HARQ-ACK feedback information for random access message 4 (or random access message B) from the terminal device.

is the frequency domain offset value of the common PUCCH resource set.

if

is the frequency domain offset value of the common PUCCH resource set,

is the size of the second uplink BWP (number of PRBs).

if

is the frequency domain offset value of the common PUCCH resource set,

is the size of the second initial uplink BWP (number of PRBs).

if

is the frequency domain offset value of the common PUCCH resource set,

is the size of the second uplink BWP (number of PRBs).

if

is the frequency domain offset value of the common PUCCH resource set.

if

is the frequency domain offset value of the common PUCCH resource set.

In the fifth aspect, the embodiment of the present application provides a communication device, the communication device has the function of realizing the behavior in the method example of the first aspect or the third aspect above, and the beneficial effect can refer to the description of the first aspect or the third aspect I won't repeat them here. The communication device may be the terminal device in the first aspect or the third aspect, or the communication device may be a device capable of supporting the terminal device in the first aspect to implement the functions required by the method provided in the first aspect, such as a chip or system on a chip. Alternatively, the communication device may be a device capable of supporting the terminal device in the third aspect to implement the functions required by the method provided in the third aspect, such as a chip or a chip system.

In a possible design, the communication device includes corresponding means or modules for performing the method of the first aspect or the third aspect. For example, the communication device: includes a processing unit (sometimes also called a processing module or a processor) and/or a transceiver unit (sometimes also called a transceiver module or a transceiver). These units (modules) can perform the corresponding functions in the method examples of the first aspect or the third aspect, for details, refer to the detailed description in the method examples, and details are not repeated here.

In the sixth aspect, the embodiment of the present application provides a communication device, the communication device has the function of realizing the behavior in the method example of the second aspect or the fourth aspect above, and for the beneficial effect, please refer to the description of the second aspect or the fourth aspect I won't repeat them here. The communication device may be the network device in the second aspect or the fourth aspect, or the communication device may be a device capable of supporting the network device in the second aspect to implement the functions required by the method provided in the second aspect, such as a chip or system on a chip. Alternatively, the communication device may be a device capable of supporting the network device in the fourth aspect to implement the functions required by the method provided in the fourth aspect, such as a chip or a chip system.

In a possible design, the communication device includes corresponding means or modules for performing the method of the second aspect or the fourth aspect. For example, the communication device: includes a processing unit (sometimes also called a processing module or a processor) and/or a transceiver unit (sometimes also called a transceiver module or a transceiver). These units (modules) can perform the corresponding functions in the method examples of the second aspect or the fourth aspect above. For details, refer to the detailed description in the method examples, which will not be repeated here.

In the seventh aspect, the embodiment of the present application provides a communication device, which may be the communication device in the fifth aspect or the sixth aspect in the above embodiments, or the communication device set in the fifth aspect or the sixth aspect chip or system-on-a-chip. The communication device includes a communication interface, a processor, and optionally, a memory. Wherein, the memory is used to store computer programs or instructions or data, and the processor is coupled with the memory and the communication interface, and when the processor reads the computer programs or instructions or data, the communication device executes the method described above in the embodiment of the terminal device The executed method, or execute the method executed by the network device in the foregoing method embodiments.

In an eighth aspect, the embodiment of the present application provides a communication device, where the communication device includes an input and output interface and a logic circuit. The input and output interfaces are used to input and/or output information. The logic circuit is used to execute the method described in any one of the first aspect to the fourth aspect.

In the ninth aspect, the embodiment of the present application provides a system on chip, the system on chip includes a processor, and may also include a memory and/or a communication interface, for implementing any of the aspects described in the first aspect to the fourth aspect. method. In a possible implementation manner, the chip system further includes a memory, configured to store computer programs. The system-on-a-chip may consist of chips, or may include chips and other discrete devices.

In the tenth aspect, the embodiment of the present application provides a communication system, the communication system includes the communication device in the fifth aspect for implementing the method in the first aspect and the communication device in the sixth aspect for implementing the method in the second aspect . Alternatively, the communication system includes the communication device in the fifth aspect for implementing the method in the third aspect and the communication device in the sixth aspect for implementing the method in the fourth aspect.

In an eleventh aspect, the present application provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed, any one of the above-mentioned first to fourth aspects can be realized. Methods.

In a twelfth aspect, a computer program product is provided, the computer program product comprising: computer program code, when the computer program code is executed, the method in any one of the above first to fourth aspects be executed.

For the beneficial effects of the above fifth to twelfth aspects and their implementations, reference may be made to the description of the first or third aspect, or the beneficial effects of the first or third aspect and their implementations.

Description of drawings

Figure 1 is a schematic diagram of the association of 8 ROs and 8 SSBs provided by the embodiment of the present application;

FIG. 2 is a schematic diagram of a network architecture applicable to an embodiment of the present application;

FIG. 3 is a schematic flowchart of a random access preamble sending method and a receiving method provided in an embodiment of the present application;

FIG. 4 is a schematic diagram of the first correspondence and the second correspondence provided by the embodiment of the present application;

FIG. 5 is another schematic diagram of the first correspondence and the second correspondence provided by the embodiment of the present application;

FIG. 6 is a schematic diagram of RO multiplexing by different types of terminal devices provided by the embodiment of the present application;

FIG. 7 is a schematic diagram of a PUCCH resource provided by an embodiment of the present application;

FIG. 8 is a schematic diagram of PUCCH resource frequency hopping transmission in the case where the first type of terminal device and the second type of terminal device coexist provided by the embodiment of the present application;

FIG. 9 is a schematic diagram of the first transmission of the PUCCH provided by the embodiment of the present application;

FIG. 10 is a schematic diagram of the second transmission of the PUCCH provided by the embodiment of the present application;

FIG. 11 is a schematic diagram of a third transmission of the PUCCH provided by the embodiment of the present application;

FIG. 12 is a schematic diagram of a fourth transmission of the PUCCH provided by the embodiment of the present application;

FIG. 13 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 14 is another schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 15 is a schematic structural diagram of an exemplary communication device provided by an embodiment of the present application;

FIG. 16 is a schematic structural diagram of another communication device provided by an embodiment of the present application.

Detailed ways

In order to facilitate understanding of the technical solutions provided by the various embodiments of the present application, some technical terms involved in the embodiments of the present application are explained first.

1) A network device is an access device for a terminal device to wirelessly access the mobile communication system, for example including a radio access network (radio access network, RAN) device, such as a base station (for example, an access point). The network device can also refer to the device that communicates with the terminal on the air interface, such as other possible terminal devices; and for example, the network device in a vehicle to everything (V2X) technology is a road side unit (road side unit, RSU). The base station can be used to convert received air frames to and from Internet Protocol (IP) packets and act as a router between the terminal and the rest of the radio access network, which can include an IP network . The RSU can be a fixed infrastructure entity supporting V2X applications, and can exchange messages with other entities supporting V2X applications. The network device can also coordinate the attribute management of the air interface. For example, the network equipment may include an evolved base station (evolved Node B) in a long term evolution (long term evolution, LTE) system or an advanced long term evolution (long term evolution-advanced, LTE-A), which may also be referred to as (eNB or eNB) for short. -NodeB); or may also include the next generation node B (next generation node B, gNB) in the new wireless (new radio, NR) system; or may also include in the wireless fidelity (wireless-fidelity, Wi-Fi) system access nodes, etc.; or network devices can be relay stations, vehicle-mounted devices, and future evolved public land mobile network (Public Land Mobile Network, PLMN) devices, devices in device-to-device (D2D) networks, Devices in a machine to machine (M2M) network, devices in an IoT network, etc. The embodiment of the present application does not limit the specific technology and specific device form adopted by the wireless network device. For example, the network equipment may correspond to eNB in the fourth generation mobile communication technology (the fourth generation, 4G) system, and correspond to gNB in the 5G system.

In addition, the base station in this embodiment of the present application may include a centralized unit (centralized unit, CU) and a distributed unit (distributed unit, DU), and multiple DUs may be centrally controlled by one CU. CU and DU can be divided according to the protocol layer functions of the wireless network they have. For example, the functions of the packet data convergence protocol (packet data convergence protocol, PDCP) layer and the protocol layer above are set in the protocol layer below the CU and PDCP, such as the wireless link Functions such as the radio link control (radio link control, RLC) layer and the medium access control (medium access control, MAC) layer are set in the DU. It should be noted that the division of such protocol layers is only an example, and may also be divided in other protocol layers. The radio frequency device can be remote, not placed in the DU, or integrated in the DU, or partially remote and partially integrated in the DU, which is not limited in this embodiment of the present application. In addition, in some embodiments, the control plane (control plan, CP) and the user plane (user plan, UP) of the CU can also be separated and divided into different entities for implementation, respectively being the control plane CU entity (CU-CP entity) And user plane CU entity (CU-UP entity). In this network architecture, the signaling generated by the CU can be sent to the terminal device through the DU, or the signaling generated by the UE can be sent to the CU through the DU. The DU can directly transmit the signaling to the UE or CU through protocol layer encapsulation without parsing the signaling. In this network architecture, the CU is used as a network device on the RAN side. In addition, the CU may also be used as a network device on the core network (core network, CN) side, which is not limited in this application.

The network device may also include a core network device, and the core network device includes, for example, an access and mobility management function (access and mobility management function, AMF) or a user plane function (user plane function, UPF). Because the embodiments of the present application mainly relate to access network equipment, in the following, unless otherwise specified, the network equipment mentioned refers to access network equipment.

In the embodiment of the present application, the device for realizing the function of the network device may be a network device, or a device capable of supporting the network device to realize the function, such as a chip system, and the device may be installed in the network device. In the technical solution provided by the embodiment of the present application, the technical solution provided by the embodiment of the present application is described by taking the network device as an example for realizing the function of the network device.

2) The terminal device is a device with a wireless transceiver function, which can send signals to or receive signals from network devices. The terminal device may be called user equipment (user equipment, UE), and sometimes also called terminal, access station, UE station, remote station, wireless communication device, or user device, etc. The terminal device is used to connect people, objects, machines, etc., and can be widely used in various scenarios, including but not limited to the following scenarios: cellular communication, D2D, V2X, machine-to-machine/machine-type communication (machine-to-machine /machine-type communications, M2M/MTC), Internet of things (Internet of things, IoT), virtual reality (virtual reality, VR), augmented reality (augmented reality, AR), industrial control (industrial control), unmanned driving ( Self driving), remote medical, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, drones, robots and other scenarios. That is to say, the terminal device in this embodiment of the present application may be the device involved in one or more scenarios above. As an example but not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device, such as glasses, gloves, watches, clothing, shoes, and the like. The terminal equipment may also include a relay (relay). For example, the terminal equipment may be customer premise equipment (customer premise equipment, CPE), and the CPE may receive signals from network equipment and forward the signals to other terminal equipment. Or it can be understood that all devices capable of performing data communication with the base station can be regarded as terminal devices. The various terminal devices described above, if they are located on the vehicle (for example, placed in the vehicle or installed in the vehicle), can be considered as vehicle-mounted terminal devices. Vehicle-mounted terminal devices are also called on-board units (OBU), for example. .

In addition, in this embodiment of the present application, a terminal device may refer to a device for implementing a terminal function, or may be a device capable of supporting a terminal device to implement the function, such as a chip system, and the device may be installed in the terminal device. For example, the terminal can also be a vehicle detector. In the embodiment of the present application, the system-on-a-chip may be composed of chips, or may include chips and other discrete devices. In the technical solutions provided in the embodiments of the present application, the technical solutions provided in the embodiments of the present application are described by taking the terminal equipment as an example for realizing the terminal functions.

According to the type of service supported by the terminal, the terminal can be divided into multiple types of terminals. For example, low complexity or low capability (REDuced CAPability, REDCAP) terminal equipment and non-low complexity or non-reduced capability terminal equipment. Non-low-complexity or non-reduced capability terminal equipment, such as enhanced mobile broadband (enhanced mobile broadband, eMBB) terminal equipment) may also be referred to as normal terminal equipment, or legacy (legacy) terminal equipment. REDCAP terminal equipment can also be called (NR light, NRL) terminal, which is a lightweight terminal equipment. Compared with legacy terminal equipment, REDCAP terminal equipment is less complex than legacy terminal equipment in terms of bandwidth, power consumption, and number of antennas.

It can be considered that there are two types of terminal devices in this embodiment of the application. For example, the first type of terminal equipment is a low-complexity terminal equipment. The second type of terminal equipment may be terminal equipment other than low-complexity terminal equipment. The distinction between the first category of terminal equipment and the second category of terminal equipment includes at least one of the following:

1. Different bandwidth capabilities. The maximum bandwidth supported by the first type of terminal device may be smaller than the maximum bandwidth supported by the second type of terminal device. For example, the second type of terminal equipment can support the maximum use of 100MHz frequency domain resources and network equipment on one carrier at the same time for communication, while the first type of terminal equipment can support the maximum simultaneous use of 20MHz or less than 20MHz frequency domain resources on one carrier communicate with network devices.

2. The number of transmitting and receiving antennas is different. The antenna configuration of the first type of terminal device may be less than the antenna configuration of the second type of terminal device. For example, the minimum antenna configuration supported by the first type of terminal device may be less than the maximum antenna configuration supported by the second type of terminal device. For example, the first type of terminal equipment may support 2-receive-1-transmit (2 receive antennas and 1 transmit antenna), or 1-receive-1-transmit (1 receive antenna and 1 transmit antenna). The second type of terminal equipment can support 4 receptions and 2 transmissions (4 receiving antennas and 2 transmitting antennas).

3. The maximum uplink transmit power is different. The maximum uplink transmit power of the first type of terminal device is smaller than the maximum uplink transmit power of the second type of terminal device.

4. The protocol version is different. The first type of terminal equipment can be considered as NR version 17 (release-17, Rel-17) or terminal equipment in versions after NR Rel-17. The second type of terminal device may be a terminal device in NR release 15 (release-15, Rel-15) or NR release 16 (release-16, Rel-16).

5. Carrier aggregation (CA) capabilities are different. For example, the first type of terminal device does not support carrier aggregation, but the second type of terminal device can support carrier aggregation; another example, the second type of terminal device and the first type of terminal device both support carrier aggregation, but the first type of terminal device supports carrier aggregation at the same time The maximum number of cells of the carrier aggregation is less than the maximum number of cells of the carrier aggregation supported by the terminal device of the second type at the same time.

6. Different frequency division duplex (FDD) capabilities. For example, the first type of terminal equipment supports only half-duplex FDD, while the second type of terminal equipment supports full-duplex FDD.

7. The ability to process data is different. For example, the minimum time delay between receiving downlink data and sending feedback on the downlink data of the first type of terminal equipment is greater than that of the second type of terminal equipment receiving downlink data and sending the downlink data. Minimum delay between feedbacks.

8. Different processing capabilities (ability/capability). For example, the baseband processing capability of the first type of terminal device is lower than the baseband processing capability of the second type of terminal device. Wherein, the baseband processing capability may include at least one of the following: the maximum number of MIMO layers supported by the terminal device for data transmission, the number of HARQ processes supported by the terminal device, and the maximum transmission block size (transmission block size, TBS) supported by the terminal device.

9. The transmission peak rates of uplink and/or downlink are different. The transmission peak rate refers to the maximum data transmission rate that a terminal device can achieve within a unit time (for example, per second). The uplink peak rate supported by the first type of terminal device may be lower than the uplink peak rate supported by the second type of terminal device, and/or the downlink peak rate supported by the first type of terminal device may be higher than the downlink peak rate supported by the second type of terminal device.

10. The buffer size is different. The cache buffer can be understood as the total size of the Layer 2 (Layer 2, L2) cache, which is defined as the number of bytes buffered by the terminal device in the RLC transmission window, reception and reordering window for all radio bearers and in the PDCP reordering window The sum of the number of bytes cached. Alternatively, the cache buffer can also be understood as the total number of soft channel bits that can be used for Hybrid Automatic Repeat reQuest (HARQ) processing.

Of course, the above are only examples, and there may be other differences between the first type of terminal equipment and the second type of terminal equipment. In addition to the previous differences above, there may be other differences. For example, the first type of terminal equipment supports coverage enhancement, while the second type of terminal equipment does not support coverage enhancement; another example, the first type of terminal equipment supports small packet transmission, and the second type of terminal equipment supports Small packet transmission is not supported, and no examples will be given here.

3) BWP refers to a continuous frequency resource in the frequency domain. BWP can be divided into uplink BWP and downlink BWP. The uplink BWP is used for uplink transmission by the terminal equipment, and the bandwidth of the uplink BWP may exceed the transmission bandwidth capability of the terminal equipment. The downlink BWP is used for terminal equipment to perform downlink reception, and the bandwidth of the downlink BWP may exceed the receiving bandwidth capability of the terminal equipment. In this embodiment of the application, the bandwidth capability of the terminal device may be the channel bandwidth supported by the terminal device (also referred to as bandwidth for short), or the maximum channel bandwidth supported by the terminal device, or the resource block (resource block, RB) quantity, or the maximum resource block quantity supported by the terminal device. It can be understood that the bandwidth of the BWP does not exceed the maximum bandwidth of the terminal device. The bandwidth of the BWP of the first type of terminal device may exceed the bandwidth capability of the second type of terminal device, that is, exceed the maximum bandwidth supported by the second type of terminal device.

A terminal device can be configured with one or more BWPs, but within a period of time, the terminal device can only work on one of the BWPs, and this BWP can also be regarded as the BWP activated by the terminal device. When a terminal device is configured with multiple BWPs, the terminal device can switch between multiple BWPs. The BWP used by the terminal device to initially access the network may be referred to as an initial BWP, such as an initial downlink BWP or an initial uplink BWP.

4) "At least one" means one or more, and "multiple" means two or more. "And/or" describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that 44. The associated objects before and after are a kind of "or" relationship. "At least one of the following" or similar expressions refer to any combination of these more than ten items, including any combination of single or plural items. For example, at least one item (piece) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple .

And, unless otherwise stated, the ordinal numerals such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, timing, priority or priority of multiple objects. Importance. For example, the first category and the second category are only used to distinguish different types, but not to indicate the difference in priority or importance of the two types. In the embodiments of this application, "if" and "if" can be replaced, and unless otherwise specified, "when" and "in the case of" can be replaced. In this embodiment of the application, the preamble may also be referred to as a random access request, a preamble, a preamble carried by a physical random access channel (physical random access channel, PRACH), a RACH preamble, and a random access message 1 (message 1, Msg1) , or message A (message A, MsgA), etc. Random access message 3 is also called message 3 (message3, Msg3), and the conflict resolution message is also called random access message 4 (message4, Msg4). The corresponding relationship between the SSB set and the RO set is also referred to as the association relationship between the SSB set and the RO set, or the mapping relationship between the SSB set and the RO set.

The technical solution provided by the embodiments of the present application can be applied to the fifth generation (the fifth generation, 5G) mobile communication system, such as the NR system, or to the LTE system, or can also be applied to the next generation mobile communication system or other similar The specific communication system is not limited.

Please refer to FIG. 1 , which is a network architecture applied in the embodiment of the present application. Include network equipment and 6 terminal equipments in Fig. 1, these 6 terminal equipments can be cell phone, smart phone, portable computer, handheld communication equipment, handheld computing equipment, satellite radio device, global positioning system, PDA and/or be used for Any other suitable device that communicates over a wireless communication system and can be connected to the network device. These six terminal devices are all capable of communicating with network devices. Of course, the number of terminal devices in FIG. 2 is just an example, and may be less or more. It should be noted that FIG. 1 is only a schematic diagram, and the embodiment of the present application does not limit the types of equipment included in the communication system. For example, the communication system may also include other network equipment, such as wireless relay equipment, wireless backhaul equipment, etc. .

The foregoing describes some technical terms involved in the embodiments of the present application and the applicable network architecture of the embodiments of the present application. The following describes the technical features involved in the embodiments of the present application.

In order to realize data transmission between the terminal device and the network device, the terminal device establishes a connection with the network device through a random access process. When the terminal device performs the random access process, it will send a preamble to the network device to initiate the random access process. Specifically, the terminal device may select a preamble from the preambles associated with the SSB, and send the selected preamble on the RO.

In NR, multi-beam operation is introduced, and the random access process is transmitted based on beams. For example, NR systems support network devices sending SSBs on multiple beams. For example, within a frequency range (frequency range, FR) 1, the network device can support up to 8 SSBs, that is, the network device can send 8 SSBs to the terminal device. After receiving multiple SSBs from the network device, the terminal device may select an SSB from the multiple SSBs, for example, select an SSB with higher received power, and send a preamble based on the beam of the SSB. At present, the mapping relationship between the SSB and the RO is specified, and the network device can determine which SSB beam the terminal device selects to send the preamble through the preamble sent by the terminal device and the RO.

The mapping relationship between SSB and RO is configured by the network device through high-level parameters, and the high-level parameters mainly include "msg1-FDM" and "ssb-perRACH-OccasionAndCB-PreamblesPerSSB". The parameter msg1-FDM mainly defines that there are multiple ROs on the frequency domain resource, for example, there are P ROs, and P is an integer greater than or equal to 1, such as {1,2,4,8}. The parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB mainly defines that N SSBs are mapped (also referred to as associations) to one RO, and R preambles are mapped to one SSB. For example, when N is less than 1, 1 SSB is mapped to 1/N ROs; when N is greater than 1, N SSBs are mapped to 1 RO (it can also be considered that 1 SSB is mapped to 1/N ROs). For example, when N=1/2, one SSB is mapped to 2 ROs, and when N=2, 2 SSBs are mapped to 1 RO. That is to say, one SSB can map to one or more ROs, and one RO can also map to one or more SSBs. Each SSB is mapped to R consecutive preambles on the RO mapped to the SSB. If multiple SSBs are mapped to one RO, the preamble start index (serial number) associated with each SSB is

Among them, n is the relative sequence number of the SSB among the multiple SSBs sent by the network device,

It is the maximum number of preambles multiplexed on each RO. The SSB is mapped to the RO based on the following order: First, it is mapped in the order in which the preamble sequence number in one RO increases; secondly, it is mapped in the order in which the frequency domain resource index of at least one RO that is multiplexed in the frequency domain increases; The time-domain resource index of at least one RO time-division multiplexed in the slot is mapped in the order of increasing; finally, the index is mapped in the increasing order of the PRACH time slot.

Currently, it is stipulated that a maximum of 8 ROs can be multiplexed in the frequency domain, and all multiplexable ROs should be located in the BWP configured for the terminal equipment, and the bandwidth of the BWP does not include the maximum bandwidth of the terminal equipment. Since the bandwidth capabilities of the first-type terminal equipment and the second-type terminal equipment are different, when the first-type terminal equipment and the second-type terminal equipment coexist, the network equipment can configure the first-type terminal equipment and the second-type terminal equipment respectively. Dedicated BWP, for example, the network device configures the first BWP for the first type of terminal equipment, and configures the second BWP for the second type of terminal equipment. When the total bandwidth of the most multiplexed ROs in the frequency domain does not exceed the second BWP of the second type of terminal equipment, it may exceed the first BWP of the first type of terminal equipment. If the RO associated with the SSB selected by the first type of terminal device is outside the maximum bandwidth supported by the first type of terminal device, then the RO cannot be used to initiate random access, resulting in the failure of the first type of terminal device to access the network. It can also be understood that the RO selected by the first type of terminal device is not the RO associated with the previously selected SSB, resulting in low access performance of the first type of terminal device, or even failure to access the network.

For example, please refer to FIG. 2 , which is a schematic diagram of association of 8 ROs and 8 SSBs. Figure 2 takes the one-to-one correspondence between 8 ROs and 8 SSBs as an example. In Figure 2, the maximum bandwidth supported by the first type of terminal equipment is 20MHz, the initial downlink BWP bandwidth configured by the network equipment for the first type of terminal equipment is 20MHz, the length of the random access preamble is 839, and the subcarrier spacing (subcarrier spacing, SCS ) is 5 kHz, that is, the bandwidth occupied by one RO is about 4.2 MHz as an example. Assuming that 8 ROs are multiplexed in the frequency domain, the total bandwidth of the 8 ROs is 33.6 MHz. As shown in FIG. 2, RO#2-RO#5 are within the maximum bandwidth supported by the first type of terminal equipment. RO#0-RO#1 and RO#6-RO#7 are outside the maximum bandwidth supported by the first type of terminal equipment. Before the first type of terminal device initiates random access, the selected SSB may be one of SSB#0-SSB#1 and SSB#6-SSB#7, for example, the first type of terminal device selects SSB#7. The RO associated with SSB#7 is RO#7, which is outside the maximum bandwidth supported by the first type of terminal equipment, that is, the first type of terminal equipment cannot use RO#7 to send the PRACH. If the terminal device uses one of RO#2-RO#5 to send PRACH, it will cause the network device to use the SSB beam corresponding to the used RO in SSB#2-SSB#5 to send Msg2 and Msg4, which will cause the terminal device to receive The performance of Msg2 and Msg4 is very poor, which causes random access failure of the terminal device.

In view of this, an embodiment of the present application provides a method for sending a random access preamble. This method can configure the association relationship between SSB and RO according to the type of terminal equipment (or the maximum supported bandwidth). For example, the ROs in the association relationship between the SSB and the RO configured for a certain type of terminal equipment are all within the maximum bandwidth supported by this type of terminal equipment. In this way, no matter which SSB is selected by this type of terminal equipment, the RO determined according to the selected SSB can be used, so as to reduce the number of random access failures and improve the efficiency of accessing the network.

In a possible implementation manner, the current association relationship between the SSB set and the RO set may be used for the second type of terminal equipment, that is, N SSBs are mapped to 1 RO. For the first type of terminal equipment, a new association relationship between the SSB set and the RO set is proposed. That is, the embodiment of the present application newly adds an association relationship between the SSB set and the RO set configured separately for the first type of terminal equipment. For the convenience of description, the association relationship between the SSB set dedicated to the first type of terminal equipment and the RO set can be called the first correspondence relationship, and the association relationship between the SSB set dedicated to the second type terminal equipment and the RO set can be called the second correspondence relationship . The SSB set in the first correspondence is called the first SSB set, and the RO set in the first correspondence is called the first RO set. The SSB set in the second correspondence relationship is called the second SSB set, and the RO set in the second correspondence relationship is called the second RO set. The first SSB set and the second SSB set may be the same or different. Since the bandwidth capabilities of the first type of terminal equipment and the second type of terminal equipment are different, when the first type of terminal equipment and the second type of terminal equipment coexist, the network equipment can be configured separately for the first type of terminal equipment and the second type of terminal equipment BWP, for example, the network device configures a first BWP for a first type of terminal device, and configures a second BWP for a second type of terminal device. For example, the bandwidth of the first BWP is smaller than the bandwidth of the second BWP, so as to adapt to the bandwidth of the first type of terminal device and the second type of terminal device. Certainly, the bandwidth of the first BWP and the bandwidth of the second BWP may also be the same. It should be understood that the SSBs in the first SSB set are sent on the first downlink BWP or the second downlink BWP, and the SSBs in the second SSB set can be sent on the second downlink BWP. If the first SSB set is sent in the second downlink BWP, the first SSB set and the second SSB set are the same; if an SSB set is sent in the first downlink BWP, the first SSB set and the second SSB set are different.

It can be understood that when the total bandwidth of the most multiplexed ROs in the frequency domain does not exceed the second uplink BWP, it may exceed the first uplink BWP. If the RO associated with the SSB selected by the first type of terminal device happens to be outside the maximum bandwidth supported by the first type of terminal device, the first type of terminal device cannot access the network. For this reason, in this embodiment of the application, the first corresponding relationship configured by the network device can ensure that the ROs associated with the SSB selected by the first type of terminal device are located in the first uplink BWP, so as to reduce the number of random access failures and improve the access rate. into the efficiency of the network. It can also be understood that the first RO set in the first correspondence relationship is all ROs that can be used by the first type of terminal equipment (also referred to as valid ROs herein). It can be considered that the ROs included in the first RO set are part of the ROs in the second RO set, for example, the first RO set includes the ROs in the first BWP in the second RO set. Exemplarily, the first RO set is composed of ROs located in the first uplink BWP in the second RO set. For example, please continue to refer to Figure 2, the second RO set includes RO#0-RO#7, and the ROs in the first uplink BWP in the second RO set are RO#2-RO#5, then the first RO set Including RO#2-RO#5.

In the following, the process of sending a random access preamble by a terminal device will be introduced in combination with the foregoing embodiments and related drawings. In the following introduction process, it is taken as an example that the communication method provided by the embodiment of the present application is applied to the network architecture shown in FIG. 1 . In addition, the method may be performed by two communication devices, such as a first communication device and a second communication device. Wherein, the first communication device may be a terminal device or a communication device capable of supporting the terminal device to implement the functions required by the method, and of course may also be other communication devices, such as a chip system. The second communication device may be a network device or a communication device capable of supporting the network device to implement the functions required by the method, and of course may also be other communication devices, such as a chip system. And there is no limitation on the implementation manners of the first communication device and the second communication device. For example, the first communication device may be a terminal device, and the second communication device may be a network device; or the first communication device may be a communication device capable of supporting the terminal device to implement the functions required by the method, and the second communication device may be a network device, etc. .

The following uses an example in which the method for sending a random access preamble provided by the embodiment of the present application is executed by a terminal device and a network device, that is, an example in which the first communication device is a terminal device and the second communication device is a network device. If this embodiment is applied to the network architecture shown in Figure 1, the terminal devices described below may be the terminal devices in the network architecture shown in Figure 1, and the network devices described below may be those shown in Figure 1 Network devices in the network architecture.

Please refer to FIG. 3 , which is a schematic flowchart of a method for sending and receiving a random access preamble provided by an embodiment of the present application.

S301. The network device sends the first configuration information and the second configuration information, and correspondingly, the terminal device receives the first configuration information and the second configuration information.

The network device may configure the corresponding relationship between the SSB set and the RO set for the first type of terminal device through the first configuration information, and configure the corresponding relationship between the SSB set and the RO set for the second type of terminal device through the second configuration information. For example, the first configuration information may indicate a first correspondence between the first SSB set and the first RO set, and the second configuration information may indicate a second correspondence between the second SSB set and the second RO set. The ROs included in the first RO set are located in the first uplink BWP configured by the network device for the first type of terminal device, and the ROs included in the second RO set are all located in the second uplink BWP configured by the network device for the first type of terminal device. It can be understood that, since the bandwidth capability of the first type of terminal equipment is smaller than the bandwidth capability of the second type of terminal equipment, the bandwidth size of the first uplink BWP may be smaller than the bandwidth size of the second uplink BWP, thus causing the second RO set to include Some or some ROs may be located outside the first upstream BWP. In order to ensure that the ROs included in the first RO set are all located in the first uplink BWP configured by the network device for the first type of terminal equipment, in this embodiment of the application, the first RO set may include the ROs located in the first uplink BWP in the second RO set . For example, the first RO set may consist of ROs located in the first uplink BWP in the second RO set. In this way, when the first type of terminal equipment and the second type of terminal equipment coexist, since the network equipment independently configures the corresponding relationship between the SSB set and the RO set for the first type of terminal equipment and the second type of terminal equipment, it is possible to make all types of The RO associated with the SSB selected by the terminal device is an effective RO, so as to improve the network access efficiency of various terminal devices.

S302. The terminal device sends a random access preamble to the network device based on the first RO set.

The terminal device may be a first-type terminal device. Before sending a random access preamble to the network device, the terminal device may determine a first RO set based on the first correspondence, and select an RO from the first RO set. The random access preamble is sent to the network device on the RO. Since the first RO set is located in the first uplink BWP, that is, they are all located within the maximum bandwidth supported by the first type of terminal equipment, therefore, most of the ROs selected by the first type of terminal equipment from the first RO set are valid and can reduce The number of times that the first type of terminal equipment fails to access the network randomly, so as to improve the efficiency of the first type of terminal equipment accessing the network.

The following describes how the network device configures the first correspondence through the first configuration information and how to configure the second correspondence through the second configuration information.

For the second type of terminal device, the second configuration information may follow the current way of configuring the second corresponding relationship for the second type of terminal device. For example, the second configuration information (or the second correspondence) may indicate that N SSBs are mapped to 1 RO. For example, if a maximum of 8 ROs are multiplexed in the frequency domain, then N is one of {1/8, 1/4, 1/2, 1, 2, 4, 8}. {1/8, 1/4, 1/2, 1, 2, 4, 8} can be regarded as a candidate set of N, which is also referred to as a second candidate set in this paper. Similarly, the first configuration information (or the first correspondence) may be used to indicate that M SSBs are mapped to one RO. Wherein, N and M are different, so that the first RO set is all located in the first BWP.

For example, please refer to FIG. 4 , which is a schematic diagram of the first correspondence and the second correspondence. In FIG. 4 , the second correspondence indicates that one SSB is mapped to one RO, that is, N=1 as an example. Take the first correspondence indicating that 2 SSBs are mapped to 1 RO, that is, M=2, as an example. Suppose RO0-RO7 are located in the second BWP, and RO2-RO5 are located in the first BWP. Since the first correspondence indicates that 2 SSBs are mapped to 1 RO, as shown in FIG. 4 , SSB0-SSB1 is mapped to RO2, SSB2-SSB3 is mapped to RO3, SSB4-SSB5 is mapped to RO4, and SSB6-SSB6 is mapped to RO5. In this way, no matter which SSB is selected by the terminal device of the first type, the corresponding RO is located in the first BWP. Then the RO determined by the first type of terminal device based on the first correspondence is always a valid RO, thereby improving the network access efficiency of the first type of terminal device.

M may be a value different from N in the second candidate set. In this case, the currently defined second candidate set can be reused without changing the existing protocol to define the second candidate set, which is relatively simple. Alternatively, a candidate set different from the second candidate set may be predefined, such as the first candidate set, and M may be a value in the first candidate set. Wherein, the first candidate set may be a proper subset of the second candidate set, for example, the first candidate set may be {1, 2, 4, 8}. In this case, a first candidate set and a second candidate set may be predefined. The network device may select a value from the first candidate set as M, and select a value from the second candidate set as N.

In a possible implementation manner, the second configuration information may be carried in the configuration information of the second uplink BWP, and it may also be considered that the second configuration information is an information element in the configuration information of the second uplink BWP, and the information element is used to configure Second Correspondence. Similarly, the first configuration information may be carried in the configuration information of the first uplink BWP, or it may be considered that the first configuration information is an information element in the configuration information of the first uplink BWP, and the information element is used to configure the first correspondence .

It can be understood that if the number of ROs included in the first RO set is not a value in {1, 2, 4, 8}, for example, the first RO set includes 6 ROs. In this case, the first configuration information indicates that M SSBs are mapped to one RO, and some ROs are not associated with any SSB, that is, these ROs will not be used, which is wasteful. For example, please refer to FIG. 5 , which is a schematic diagram of the first correspondence and the second correspondence. The difference between FIG. 5 and FIG. 4 is that the first RO set includes 6 ROs, namely RO1-RO6. That is, RO1-RO6 are located in the first BWP. Since the first RO set includes 6 ROs, these 6 ROs are mapped to 8 SSBs, and 2 SSBs are mapped to 1 RO, and the remaining 2 ROs have no SSBs that can be associated, then these 2 ROs will not be used by the terminal device Use, more wasteful.

For this reason, the embodiment of the present application provides another configuration manner of the first correspondence. For example, all preambles corresponding to the first RO set may be grouped according to the number of SSBs included in the second SSB set. For example, the second SSB set includes Q SSBs, and preambles corresponding to all ROs included in the first RO set may be divided into Q preamble groups. There is a one-to-one correspondence between Q SSBs and Q preamble groups. Since the first RO set corresponds to Q preamble groups, that is, the P ROs included in the first RO set have corresponding relationships with the Q preamble groups. Therefore, based on the correspondence between P ROs and Q preamble groups in the first RO set, and the correspondence between Q SSBs and Q preamble groups, the network device and terminal device can obtain the correspondence between P ROs and Q SSBs , that is, the first correspondence.

Following the example in FIG. 5 , in FIG. 5 , all the preambles associated with the six ROs can be divided into eight preamble groups, that is, G0-G7 in FIG. 5 . As shown in Figure 5, each of the 6 ROs is associated with 64 preambles, and the indexes of the preambles associated with these 6 ROs are divided into 8 groups from 0 to 383. Then the 6 ROs correspond to the 8 preamble groups. The 8 preamble groups can correspond to 8 SSBs one by one, for example, G0 corresponds to SSB0, G1 corresponds to SSB1, and so on, G7 corresponds to SSB7. In this way, the 6 ROs also have a corresponding relationship with the 8 SSBs, that is, all ROs in the first RO set are associated with SSBs, so as to improve RO utilization as much as possible.

In a possible implementation manner, the second configuration information may be carried in an information element, such as the first information element, in the configuration information of the second uplink BWP. The terminal device receives the configuration information of the second uplink BWP, and can determine the second corresponding relationship according to the first information element. Similarly, the first configuration information may be carried in the configuration information of the first uplink BWP, and may also be regarded as an information element, such as a second information element, in the configuration information of the first uplink BWP. The second information element may include the number P of ROs included in the first RO set. For example, the second information element may indicate which ROs in the second RO set the first RO set includes in a bitmap manner. After receiving the configuration information of the first uplink BWP, the terminal device can determine that the first RO set includes P ROs according to the second information element, and can assign all preambles associated with these P ROs according to the number Q of SSBs included in the second SSB set Divided into Q preamble groups. The terminal device may determine the correspondence between the P ROs and the Q SSBs according to the correspondence between the P ROs and the Q preamble groups, and the one-to-one correspondence between the Q preamble groups and the Q SSBs, that is, determine the first correspondence.

In addition, the embodiment of the present application does not limit the ROs included in the first RO set, as long as the ROs included in the first RO set are all in the first uplink BWP. It can be understood that the terminal device of the first type and the terminal device of the second type share multiple ROs. For the terminal device of the second type, when the shared RO is used for random access, the probability of preamble conflict becomes larger, resulting in The success rate of random access decreases. For example, at the same time, both the first-type terminal device and the second-type terminal device select the same RO. Obviously, when the RO is used for random access, the preambles selected by the two types of terminal devices may conflict. In particular, the second type of terminal equipment always uses certain ROs, and within the same time period, the first type of terminal equipment also uses these ROs, which always affects these ROs, that is, the second type of terminal equipment in the fixed SSB direction. In order to minimize the impact of the first type of terminal equipment on the random access performance of the second type of terminal equipment and ensure the random access performance of the first type of terminal equipment, in the embodiment of this application, the first type of terminal equipment is allowed to operate in different The first RO set used in the time unit is different. For example, in the first time unit, the first RO set includes RO#0-RO#3; in the second time unit, the first RO set includes RO#2-RO#5; An RO set includes RO#4-RO#7. Since the ROs included in the first RO set change in different time units, it is possible to avoid the impact of the first type of terminal equipment on the second type of terminal equipment with the SSB beam direction associated with some fixed ROs, so as to balance the first type Random access performance of the terminal device and the second type of terminal device.

The specific implementation forms in which the first RO sets are different in different time units may include the following two.

Implementation form 1, the network device may make the first RO set different in different time units by adjusting the position of the first RO set. For example, in a first time unit, a first RO set occupies a first frequency domain resource, and in a second time unit, a first RO set occupies a second frequency domain resource, wherein the first frequency domain resource and the second frequency domain resource The resources are different. Since the first frequency domain resource is different from the second frequency domain resource, the RO corresponding to the first frequency domain resource is also different from the RO corresponding to the second frequency domain resource. different time units.

Exemplarily, it may be stipulated that in different random access periods, the starting ROs in the first RO set are different. For example, in a random access period, the index index of the starting RO in the first RO set=floor((SFN×10+subframe)/Period)mod X, where X is the number of ROs included in the first RO set SFN is the frame number of the system frame where the initial RO is located in the first RO set, subframe is the frame number of the system subframe where the initial RO is located in the first RO set, and Period is the period of the random access physical channel. That is, by constraining the index of the starting RO of the first RO set in each PRACH period, the first RO set is different in different periods.

The second implementation form can make the first RO set different in different time units by changing the frequency domain resources (also can be understood as the frequency domain position) of the first uplink BWP. For example, in the first time unit, the first uplink BWP is the first frequency domain resource, and in the second time unit, the first uplink BWP is the second frequency domain resource, wherein the first frequency domain resource and the second frequency domain resource are different . Since the first frequency domain resource is different from the second frequency domain resource, the RO corresponding to the first frequency domain resource is also different from the RO corresponding to the second frequency domain resource. Therefore, the first RO set is in the first time unit and the second frequency domain resource. different time units. Wherein, the frequency domain resources of the first uplink BWP in each time unit may be configured or pre-configured by the network device through signaling. In yet another implementation manner, the frequency resource of the first uplink BWP is determined according to the frequency resource of the first RO set.

Different types of terminal devices can be distinguished based on the preamble in the random access process, that is, the network device can determine the type of the terminal device according to the preamble sent by the terminal device. A network device can configure a preamble set for different types of terminal devices on the same RO, and the preamble sets corresponding to different types of terminal devices have no intersection. The terminal device may select and send a random access preamble from the preamble set corresponding to the type of the terminal device. After receiving the preamble, the network device determines which preamble set the preamble belongs to according to the index of the preamble, and then determines which type of terminal device the preamble comes from. For a certain type of terminal equipment, for N SSBs associated with a certain RO, the contention-based random access associated with the nth (0<=n<=N-1) SSB among the N SSBs (contention-based random access, CBRA) The starting index of the preamble can be determined in the following two ways.

Method 1, the preamble index of the first type of terminal equipment starts at the end position of the preamble of the second type of terminal equipment, and the preamble index of the first type of terminal equipment satisfies:

Method 2: The network device is the first type of terminal device and configures the initial index of the preamble in the RO through signaling. The preamble index of the first type of terminal device satisfies:

Among them, Preamble _end is the last preamble index used by the second type of terminal, preamble _start is the first preamble index used by the second type of terminal device,

The number of all preambles used for the second type of terminal equipment,

is the number of all preambles available on the RO, n is the index of the SSB associated with the RO, 0<=n<=N-1, and N is the number of SSBs associated with the RO.

For example, please refer to FIG. 6 , which is a schematic diagram of multiplexing ROs for different types of terminal devices. FIG. 6 takes the multiplexing of RO2 by the terminal equipment of the first type and the terminal equipment of the second type as an example. The number of random access preambles that can be used on RO2 is 64. The 64 random access preambles can be divided into 3 groups, wherein, the first group is used for the second type of terminal equipment and is associated with SSB2; the second group is used for the first type of terminal equipment and is associated with SSB0; the second group is used for the first type of terminal equipment and is associated with SSB0; Three groups are used for the first type of terminal equipment and are associated to SSB1.

It can be understood that the network device may configure the first downlink BWP for the first type of terminal device, and configure the second downlink BWP for the second type of terminal device. In a possible implementation manner, the network device may send the SSB to the first type of terminal device on the first downlink BWP, and send the SSB to the second type of terminal device on the second downlink BWP. In this case, the first SSB set may be the SSB sent by the network device on the first downlink BWP, and correspondingly, the second SSB set may be the SSB sent by the network device on the second BWP. Alternatively, the network device may send the SSB to the first-type terminal device and the second-type terminal device on the second downlink BWP, and the network device does not send the SSB on the first downlink BWP. In this case, the first SSB set and the second SSB set are the same, and both are SSBs sent on the second downlink BWP. Because the network device can send the SSB to the first type of terminal device in the first downlink BWP, and can also send the SSB to the first type of terminal device in the second downlink BWP.

If the network device does not send SSB on the first downlink BWP, and the first type of terminal equipment does not support not including SSB in a BWP, then the first type of terminal equipment cannot work on the first downlink BWP, and can only work on the first downlink BWP. Two downlinks on the BWP. It can also be considered that the network device cannot configure a BWP that does not include the SSB, such as the first downlink BWP, for the terminal device at this time.

To this end, the first type of terminal device notifies the network device whether the first type of terminal device supports the SSB not included in the BWP, so that the network device and the terminal device can maintain the same understanding of the BWP that can work, and prevent the terminal device from not supporting the BWP. When the SSB is included, the network device configures the terminal device with a BWP that does not include the SSB. It can be understood that the absence of SSB in the BWP can be understood as no SSB transmission on the BWP frequency domain resources. For example, the first type of terminal device may send the first capability information to the network device, where the first capability information may be used to indicate whether the first type of terminal device supports not including the SSB in the BWP. The BWP may be an initial downlink BWP configured by the network device for the terminal device of the first type, or may be a non-initial downlink BWP. For example, the first capability information may be used to indicate whether the first type of terminal equipment supports initial downlink BWP without SSB, and/or, the first capability information may be used to indicate whether the first type of terminal equipment supports non-initial downlink BWP without SSB . The first downlink BWP involved in the first capability information below may be an initial downlink BWP or a non-initial downlink BWP.

The embodiment of the present application does not limit the specific implementation manners in which the first type of terminal equipment reports the first capability information to the network equipment, for example, the following four implementation manners may be included.

Implementation manner 1, the first capability information may be reported through the preamble used in the random access message 1. It can also be understood that the terminal device of the first type sends the first capability information to the network device, in essence, the terminal device of the first type sends the random access message 1 to the network device. Wherein, the preamble used by the random access message 1 is different, and the information indicated by the random access message 1 is also different. For example, random access message 1 uses the first preamble to indicate that the first type of terminal equipment supports not including SSB in the first downlink BWP; correspondingly, random access message 1 uses the second preamble to indicate that the first type of terminal equipment supports The device does not support not including the SSB in the first downlink BWP.

Implementation manner 2, the first capability information may be reported through the RO resource used by the random access message 1. It can also be understood that the terminal device of the first type sends the first capability information to the network device, in essence, the terminal device of the first type sends the random access message 1 to the network device. Wherein, the RO resource used by the random access message 1 is different, and the information indicated by the random access message 1 is also different. For example, the random access message 1 uses the first RO resource, indicating that the first type of terminal equipment supports not including the SSB in the first BWP; correspondingly, the random access message 1 uses the second RO resource, indicating that the first type of terminal equipment does not It is supported that the SSB is not included in the first downlink BWP.

Implementation manner three, the first capability information may be reported through random access message 3. It can also be understood that the terminal device of the first type sends the first capability information to the network device, in essence, the terminal device of the first type sends the random access message 3 to the network device. If the first type of terminal device sends the random access message 3 to the network device, it may indicate that the first type of terminal device supports not including the SSB in the first downlink BWP. If the terminal device of the first type does not send the random access message 3 to the network device, it may indicate that the terminal device of the first type does not support not including the SSB in the first downlink BWP.

Implementation mode 4, the first capability information is reported through the BWP where the PUCCH carrying the HARQ-ACK feedback information for the random access message 4 is located, which can also be understood as the PUCCH resource carrying the HARQ-ACK feedback information for the random access message 4 report the location. It can also be understood that the terminal device of the first type sends the first capability information to the network device, in essence, the terminal device of the first type sends HARQ-ACK feedback information for the random access message 4 to the network device. Wherein, the BWP where the PUCCH carrying the HARQ-ACK feedback information for the random access message 4 is located may be used to indicate whether the first type of terminal equipment supports not including the SSB in the first downlink BWP. For example, the feedback information is carried on the PUCCH of the first uplink BWP, indicating that the first type of terminal equipment supports not including the SSB in the first downlink BWP; correspondingly, the feedback information is carried on the PUCCH of the second uplink BWP, indicating that the first type of terminal equipment supports A type of terminal equipment does not support that the first downlink BWP does not include the SSB.

The network device receives the first capability information from the terminal device of the first type, and determines whether the terminal device supports configuring a BWP not including the SSB according to the first capability information. For example, if the first capability information indicates that the first type of terminal device does not support configuring a BWP that does not include an SSB, then the network device must send the SSB on the first downlink BWP configured for the first type of terminal device, or if the network device configures the first downlink BWP If the downlink BWP does not send the SSB, the terminal equipment of the first type cannot work in the first downlink BWP. The first capability information indicates that the first type of terminal equipment supports that the first downlink BWP does not contain SSB, then the network equipment can selectively send SSB on the first downlink BWP, that is, it can either send SSB or not send SSB. A type of terminal equipment can work in the first downlink BWP.

In this embodiment of the present application, the network device can independently configure the corresponding relationship between the SSB set and the RO set for different types of terminal devices according to the type of the terminal device (or the maximum supported bandwidth). The ROs in the corresponding relationship between the SSB set and the RO set configured for a certain type of terminal equipment are all within the maximum bandwidth supported by this type of terminal equipment. In this way, no matter which SSB is selected by this type of terminal equipment, the RO determined according to the selected SSB can be used, so as to reduce the number of random access failures and improve the efficiency of accessing the network.

The foregoing describes how various types of terminal devices send random access preambles to network devices when the first type of terminal device and the second type of terminal device coexist in the network. The following describes how the first type of terminal device sends the HARQ-ACK feedback information for the random access message 4 when the first type of terminal device and the second type of terminal device coexist. Firstly, the related technical features of sending the HARQ-ACK feedback information for the random access message 4 by the terminal equipment of the second type are introduced.

The HARQ-ACK feedback information for the random access message 4 is transmitted through PUCCH resources. Before the terminal device enters the connected state, the network device has not configured a dedicated PUCCH resource for the terminal device, but will configure a common PUCCH resource set for the terminal device. The terminal device can use the PUCCH resource in the common PUCCH resource set to send the HARQ-ACK feedback information for the random access message 4. The common PUCCH resource set includes 16 PUCCH resources, and each PUCCH resource is associated with some parameters of the corresponding PUCCH, such as PUCCH format (format), start symbol, duration, physical resource block (physical resource block, PRB) offset value, and the cyclic shift index used for a certain PUCCH transmission. The configuration information for configuring the common PUCCH resource set can be carried in SIB1. At present, for the PUCCH transmission in the PUCCH resource set, the default protocol is to perform frequency hopping transmission within the time slot to combat frequency selective fading of the wireless channel, obtain frequency diversity gain, and improve the transmission performance of the PUCCH. The protocol specifies the PUCCH resource to be sent and the PRB position where the PUCCH resource is located. The terminal device determines the PUCCH resource according to the protocol, and sends the PUCCH on the PRB corresponding to the determined PUCCH resource.

For example, please refer to FIG. 7 , which is a schematic diagram of PUCCH resources. In FIG. 7 , the PUCCH resource set includes 16 PUCCH resources, and the numbers (or indexes) of the 16 PUCCH resources are 0-15. FIG. 7 takes PUCCH frequency hopping transmission in a time slot as an example. Currently stipulates:

1) The location of the PUCCH resource satisfies:

0 ≤ r _PUCCH ≤ 15, where _NCEE is the total number of control channel elements (control channel element, CCE) contained in the CORESET of the received PDCCH, n _{CEE, 0} is the first CCE index of the received PDCCH, Δ _PRI is the DCI The value indicated by the PUCCH resource indication field in .

2) The PRB position for transmitting PUCCH satisfies:

if

The PRB position of PUCCH in the first hop satisfies:

The PRB position of PUCCH in the second hop satisfies:

if

The PRB position of PUCCH in the first hop satisfies:

The PRB position of PUCCH in the second hop satisfies:

in,

is the size of the first uplink BWP (number of PRBs),

and N _CS take the value of the current common PUCCH resource set configuration.

Since the maximum bandwidth supported by the second type of terminal equipment is relatively large, such as 100MHz, relatively speaking, the uplink BWP configured by the network equipment for the second type of terminal equipment can be up to 100MHz, that is, the PUCCH can be transmitted by frequency hopping within 100MHz. For the first type of terminal equipment, since the maximum bandwidth supported by the first type of terminal equipment is relatively small, such as 20MHz, the uplink BWP configured by the network device for the first type of terminal equipment is also relatively small, such as 20MHz, then for the first type For terminal equipment, its PUCCH can only be transmitted by frequency hopping in the range of 20MHz, which will result in fragmentation of PUSCH resources and affect the uplink transmission rate of the second type of terminal equipment. Please refer to FIG. 8 , which is a schematic diagram of PUCCH resource frequency hopping transmission under the condition that a first-type terminal device and a second-type terminal device coexist according to an embodiment of the present application. It can be seen from Figure 8 that when the first type of terminal equipment and the second type of terminal equipment coexist, the second type of terminal equipment transmits PUCCH by frequency hopping within 100 MHz, and the first type of terminal equipment transmits PUCCH by frequency hopping of 20 MHz within 100 MHz. Cause PUSCH resource fragmentation.

In order to avoid resource fragmentation as much as possible and increase the uplink transmission rate, the embodiment of the present application provides a new solution for the PUCCH resource of the HARQ-ACK feedback information of the random access message 4 . For example, the PUCCH does not hop in a time slot, or the PUCCH is repeatedly transmitted between time slots (it can also be considered as frequency hopping transmission between time slots). The two schemes are described below.

Solution 1, the PUCCH does not hop in a time slot.

It can be understood that the current protocol defaults to performing frequency hopping transmission within a time slot. For this reason, in the embodiment of the present application, the network device may indicate whether to perform frequency hopping transmission in a time slot when the first type of terminal device sends the PUCCH through signaling. For example, the first type of terminal device sends HARQ-ACK feedback information for random access message 4 or random access message B, and the network device can instruct the first type of terminal device not to perform frequency hopping transmission in the time slot when sending PUCCH through signaling. The signaling can be SIB1 or DCI. For example, if the DCI is the DCI for scheduling random access message 4 or random access message B, for example, the Downlink assignment index field in the DCI may indicate whether the terminal device performs frequency hopping transmission in the time slot when sending the PUCCH.

Similarly, in the case that the first type of terminal equipment does not hop frequency within the time slot when sending the PUCCH for the HARQ-ACK feedback information of the random access message 4, the PUCCH resource and the PRB position for transmitting the PUCCH can be specified.

As an example, it may be specified that the PUCCH resource is only on one side of the carrier bandwidth resource, that is, the PUCCH resource is calculated from the lowest frequency or the highest frequency position of the carrier bandwidth. The PUCCH resource may reuse the current public PUCCH resource set configured by the network device for the second type of terminal device, or may be a public PUCCH resource set specially configured by the network device for the first type of terminal device. For the PUCCH resource r _PUCCH , the PRB position for transmitting the PUCCH resource satisfies:

is the frequency domain offset value of the common PUCCH resource set.

For example, please refer to FIG. 9 , which is a schematic diagram of PUCCH transmission. FIG. 9 takes PUCCH transmission in time slot X without frequency hopping as an example. In FIG. 9 , the PUCCH resource set includes 16 PUCCH resources numbered from 0-15. It is stipulated in FIG. 7 that the PUCCH resources are located on one side of the carrier bandwidth. As shown in FIG. 9 , the PUCCH resources are counted from the lowest frequency of the carrier bandwidth according to the numbers. In this example, since the PUCCH resource is located on one side of the carrier bandwidth or in the BWP on one side of the carrier bandwidth, and the PUCCH is not transmitted in a time slot by frequency hopping, there will be no fragmentation of the PUSCH resource on the carrier bandwidth. Therefore, the uplink transmission rate of the second type of terminal equipment can be increased.

As another example, the PUCCH resource is located on both sides of the carrier bandwidth, that is, the BWP configured with the PUCCH resource is located on both sides of the carrier bandwidth. For example, there are a first uplink BWP and a second uplink BWP. The first uplink BWP is configured with PUCCH resources, and the second uplink BWP is also configured with PUCCH. The first uplink BWP and the second uplink BWP are respectively located on both sides of the carrier bandwidth. That is, the first uplink BWP is calculated from the lowest frequency position of the carrier bandwidth, and the second uplink BWP is calculated from the highest frequency position of the carrier bandwidth. In this example, the PUCCH resource may reuse the public PUCCH resource set currently configured by the network device for the second type of terminal device, or may be a public PUCCH resource set specially configured by the network device for the first type of terminal device.

In this example, for the PUCCH resource r _PUCCH , it can be specified that the PRB position for transmitting the PUCCH resource satisfies:

if

is the frequency domain offset value of the common PUCCH resource set,

is the size of the second initial uplink BWP (number of PRBs).

It can be understood that, in this example, the terminal device may determine the BWP for transmitting the PUCCH resource according to the determined PUCCH resource index.

For example, please refer to FIG. 10 , which is a schematic diagram of PUCCH transmission. FIG. 8 takes PUCCH transmission in time slot X without frequency hopping as an example. FIG. 10 includes 16 PUCCH resources numbered from 0-15 in a PUCCH resource set. It is stipulated in FIG. 8 that PUCCH resources are located on both sides of the carrier bandwidth. As shown in Figure 10, PUCCH resources 0-7 are located in the first uplink BWP. The first uplink BWP is calculated from the lowest frequency of the carrier bandwidth. PUCCH resources 8-15 are located in the second uplink BWP. The second uplink BWP is calculated from the highest frequency of the carrier bandwidth. The frequency starts counting. In this example, since the PUCCH resource is located on the two uplink BWPs on both sides of the carrier bandwidth, and the PUCCH does not hop in the time slot, the fragmentation of the PUSCH resource will not occur on the carrier bandwidth, thereby improving the uplink transmission rate. .

In the second scheme, the PUCCH is repeated between time slots, and frequency hopping transmission is performed between time slots, so as to improve the transmission performance of the PUCCH.

Similar to Solution 1, the network device may instruct the terminal device of the first type through signaling whether to perform frequency hopping transmission between time slots and/or whether to repeat transmission between time slots when sending the PUCCH. For example, the first type of terminal equipment sends HARQ-ACK feedback information for random access message 4 or random access message B, and the network equipment can instruct the first type of terminal equipment to hop between time slots and/or Or frequency hopping transmission between time slots. The signaling can be SIB1 or DCI. For example, if the DCI is the DCI for scheduling random access message 4 or random access message B, the Downlink assignment index field in the DCI may instruct the terminal device to repeat and/or frequency-hop transmission between time slots when sending the PUCCH.

In order to avoid resource fragmentation, in the embodiment of the present application, the PUCCH resources may be located on both sides of the carrier bandwidth, that is, the BWPs configured with the PUCCH resources are located on both sides of the carrier bandwidth. Similar to Solution 1, there are a first uplink BWP and a second uplink BWP configured with PUCCH resources, and the first uplink BWP and the second uplink BWP are respectively located on both sides of the carrier bandwidth. In this example, the PUCCH resource may reuse the public PUCCH resource set currently configured by the network device for the second type of terminal device, or may be a public PUCCH resource set specially configured by the network device for the first type of terminal device. The difference from scheme 1 is that the PRB positions for transmitting PUCCH resources are different.

As an example, for the PUCCH resource r _PUCCH , the PRB position for transmitting the PUCCH resource satisfies:

if

is the frequency domain offset value of the common PUCCH resource set,

is the size of the second uplink BWP (number of PRBs).

if

is the frequency domain offset value of the common PUCCH resource set,

is the size of the second uplink BWP (number of PRBs).

For example, please refer to FIG. 11 , which is a schematic diagram of PUCCH transmission. FIG. 11 takes PUCCH frequency hopping transmission in time slot X and time slot Y as an example. The PUCCH resource set in FIG. 11 includes 16 PUCCH resources numbered from 0-15. It is stipulated in FIG. 9 that PUCCH resources are located on both sides of the carrier bandwidth. As shown in Figure 9, in time slot X, PUCCH resources 0-7 are located in the first uplink BWP, and PUCCH resources 8-15 are located in the second uplink BWP; in time slot Y, PUCCH resources 0-7 are located in the second uplink BWP, PUCCH Resources 8-15 are located in the first uplink BWP. The first uplink BWP is calculated from the lowest frequency of the carrier bandwidth, and the second uplink BWP is calculated from the highest frequency of the carrier bandwidth. In this example, since the PUCCH resource is located on the two uplink BWPs on both sides of the carrier bandwidth, and the adjacent frequency hopping transmission of the PUCCH is located on both sides of the carrier bandwidth when the PUCCH is transmitted in frequency hopping in the time slot, no PUSCH resource will appear on the carrier bandwidth The phenomenon of fragmentation can improve the uplink transmission rate of the second type of terminal equipment. At the same time, the PUCCH is repeated between time slots and frequency hopping transmission, which improves the PUCCH transmission performance of the first type of terminal equipment.

As another example, for the PUCCH resource r _PUCCH , the PRB position for transmitting the PUCCH resource satisfies:

if

is the frequency domain offset value of the common PUCCH resource set,

is the size of the second uplink BWP (number of PRBs).

if

is the frequency domain offset value of the common PUCCH resource set,

is the size of the second uplink BWP (number of PRBs).

For example, please refer to FIG. 12 , which is a schematic diagram of PUCCH transmission. FIG. 10 takes PUCCH frequency hopping transmission between time slot X and time slot Y as an example. The PUCCH resource set in FIG. 12 includes 16 PUCCH resources numbered from 0-15. It is stipulated in FIG. 12 that PUCCH resources are located on both sides of the carrier bandwidth. The difference from Figure 11 is that in Figure 12, the first hop of PUCCH resources 0-7 in time slot X is calculated from the lowest frequency of the carrier bandwidth starting from number 0, but the second hop of PUCCH resources in time slot Y Resources starting from number 7 are counted from the highest frequency of the carrier bandwidth. PUCCH resources 8-15 are counted from the highest frequency of the carrier bandwidth for the first hop in time slot X starting from number 15, but the PUCCH resources of the second hop in time slot Y are calculated from the lowest frequency of the carrier bandwidth starting from number 8 .

It can be understood that, in order to avoid PUSCH resource fragmentation, when frequency hopping is performed between time slots, two adjacent frequency hopping transmissions need to be on both sides of the carrier bandwidth. However, the frequency domain range of two adjacent frequency hopping transmissions will exceed the maximum bandwidth supported by the first type of terminal equipment, so the first type of terminal equipment needs to perform frequency tuning between two frequency hopping transmissions, and cannot perform frequency tuning during frequency tuning. data transmission, then the PUCCH data falling in the frequency tuning period will be discarded and not transmitted. Or, the time interval between two PUCCH frequency hopping transmissions scheduled by the network device is greater than the frequency tuning time.

In the above embodiments provided in the present application, the methods provided in the embodiments of the present application are introduced from the perspective of interaction between the terminal device and the network device. In order to realize the various functions in the method provided by the above-mentioned embodiments of the present application, the terminal device and the network device may include a hardware structure and/or a software module, and realize the above-mentioned functions in the form of a hardware structure, a software module, or a hardware structure plus a software module . Whether one of the above-mentioned functions is executed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.

An embodiment of the present application provides a communication device. The following describes the communication device used to implement the above method in the embodiment of the present application with reference to the accompanying drawings.

As shown in FIG. 13 , it is a possible exemplary block diagram of a communication device involved in the present application, and the communication device 1300 can correspondingly implement functions or steps implemented by a terminal device or a network device in each of the above method embodiments. The communication device may include a transceiver module 1301 and a processing module 1302 . Optionally, a storage module may also be included, and the storage module may be used to store instructions (code or program) and/or data. The transceiver module 1301 and the processing module 1302 may be coupled with the storage module, for example, the processing module 1302 may read instructions (code or program) and/or data in the storage module to implement corresponding methods. Each of the above modules can be set independently, or can be partially or fully integrated.

It should be understood that the processing module 1302 may be a processor or a controller, such as a general-purpose central processing unit (central processing unit, CPU), a general-purpose processor, digital signal processing (digital signal processing, DSP), an application specific integrated circuit (application specific integrated circuits, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination that implements computing functions, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like. The transceiver module 1301 is an interface circuit of the device, used to receive signals from other devices. For example, when the device is implemented as a chip, the transceiver module 1301 is an interface circuit for the chip to receive signals from other chips or devices, or an interface circuit for the chip to send signals to other chips or devices.

The communication device 1300 may be the network device, the terminal device, and the location management device in the foregoing embodiments, or may be a chip used for the network device, the terminal device, and the location management device. For example, when the communication apparatus 1300 is a network device, a terminal device or a location management device, the processing module 1302 may be, for example, a processor, and the transceiver module 1301 may be, for example, a transceiver. Optionally, the transceiver may include a radio frequency circuit, and the storage unit may be, for example, a memory. For example, when the communication device 1300 is a chip for network equipment, terminal equipment or location management equipment, the processing module 1302 may be a processor, and the transceiver module 1301 may be an input/output interface, pins or circuits, etc., for example. The processing module 1302 can execute computer-executed instructions stored in the storage unit. Optionally, the storage unit is a storage unit in the chip, such as a register, cache, etc., and the storage unit can also be the network device, terminal device or location management Storage units located outside the chip within the device, such as read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (random access memory, RAM), etc. .

In some possible implementation manners, the communication apparatus 1300 can correspondingly implement the behavior and function of the terminal device in the foregoing method embodiments. For example, the communication apparatus 1300 may be a terminal device, or may be a component (such as a chip or a circuit) applied in the terminal device. The transceiver module 1301 may be used to support communication between the terminal device and other network entities, for example, support communication between the terminal device and the network device shown in FIG. 3 . The processing module 1302 is used to control and manage the actions of the terminal device. For example, the processing module 1302 is used to support the terminal device to perform all operations of the terminal device in FIG. 3 except sending and receiving.

For example, the transceiver module 1301 can be used to perform all receiving or sending operations performed by the terminal device in the embodiment shown in FIG. 3 , such as S301 in the embodiment shown in FIG. 3 , and/or to support the other processes of the technology. Wherein, the processing module 1302 is used to execute all operations performed by the terminal device in the embodiment shown in FIG. 3 except the transceiving operation, such as S302 in the embodiment shown in FIG. Other procedures of the techniques described herein.

In some embodiments, the transceiver module 1301 is configured to receive first configuration information from a network device, where the first configuration information is used to indicate a first correspondence between the first SSB set and the first RO set, and the first RO set includes the first RO set For the ROs in the first BWP in the two RO sets, the first BWP corresponds to the first type of terminal device, the second RO set is located in the second BWP, and the second BWP corresponds to the second type of terminal device. The processing module 1302 is configured to determine a first RO set according to the first configuration information. The transceiving module 1301 is further configured to send a random access preamble to the network device based on the first RO set.

As an optional implementation manner, the first RO set is composed of ROs in the first BWP in the second RO set.

As an optional implementation manner, the second corresponding relationship between the second RO set and the second SSB set is configured by second configuration information.

As an optional implementation manner, the first correspondence indicates that M SSBs are mapped to one RO, and the second correspondence indicates that N SSBs are mapped to one RO, and N and M are different.

As an optional implementation manner, the first configuration information includes the number P of ROs included in the first RO set, and the first correspondence indicates that Q SSBs are mapped to the P ROs. Q is the number of SSBs included in the second SSB set, the random access preambles associated with the P ROs include Q random access preamble sets, and the Q SSBs correspond to the Q random access preamble sets one-to-one.

As an optional implementation manner, the first time unit and the second time unit correspond to different first RO sets.

As an optional implementation manner, the transceiver module 1301 is further configured to send the first capability information to the network device, where the first capability information is used to indicate whether the communication apparatus 1300 supports not including the SSB in the BWP.

As an optional implementation manner, the first capability information is reported through the preamble used in the random access message 1 or through the RO resource used in the random access message 1; or, the first capability information is reported through the random access message 3; Alternatively, the first capability information is reported through the PUCCH resource carrying the HARQ-ACK feedback information for the random access message 4.

In some other embodiments, the transceiver module 1301 is configured to receive second indication information from the network device, where the second indication information is used to indicate that the PUCCH resource does not perform frequency hopping transmission within a slot or frequency hopping transmission between slots, the The PUCCH resource is used by the terminal device to send HARQ-ACK feedback information for the random access message 4 (or random access message B). The random access message 4 or the random access message B may be used to carry the random access conflict resolution identifier, the RRC connection establishment message, and the like. Afterwards, the transceiving module 1301 sends HARQ-ACK feedback information for random access message 4 (or random access message B) on the PUCCH resource according to the second indication information.

As an optional implementation, the second indication information indicates that the PUCCH resource does not perform frequency hopping transmission within the time slot, and the BWP configured with the PUCCH resource is located on one side of the carrier bandwidth configured by the communication device 1300. For the PUCCH resource r _PUCCH , the PRB position for transmitting the PUCCH resource satisfies:

is the starting position in the frequency domain of the common PUCCH resource set.

As an optional implementation, the second indication information indicates that the PUCCH resource does not perform frequency hopping transmission within a time slot, and the first uplink BWP and the second uplink BWP configured with the PUCCH resource are respectively located on the carrier configured by the communication device 1300 On both sides of the bandwidth, for the PUCCH resource r _PUCCH , the PRB position for transmitting the PUCCH resource satisfies:

if

is the frequency domain offset value of the common PUCCH resource set,

is the size of the second uplink BWP (number of PRBs). It can be understood that, in this implementation manner, the terminal device may determine the BWP for transmitting the PUCCH resource according to the determined PUCCH resource index.

As an optional implementation manner, the second indication information indicates that the PUCCH resources are repeated between time slots and frequency hopping transmission between time slots, and the first uplink BWP and the second uplink BWP configured with the PUCCH resources are located in the communication device 1300 by On both sides of the configured carrier bandwidth, for the PUCCH resource r _PUCCH , the PRB position for transmitting the PUCCH resource satisfies:

if

is the frequency domain offset value of the common PUCCH resource set,

is the size of the second initial uplink BWP (number of PRBs).

if

is the frequency domain offset value of the common PUCCH resource set,

is the size of the second uplink BWP (number of PRBs).

if

is the frequency domain offset value of the common PUCCH resource set.

if

is the frequency domain offset value of the common PUCCH resource set.

For another example, the transceiver module 1301 may be used to perform all the receiving or sending operations performed by the network device in the embodiment shown in FIG. 3 , such as S301 in the embodiment shown in FIG. 3 , and/or to support the Other procedures of the described techniques. Wherein, the processing module 1302 is used to execute all the operations performed by the network device in the embodiment shown in FIG. 3 except the transceiving operation, and/or other processes used to support the technology described herein.

In some embodiments, the processing module 1302 is configured to determine first configuration information and second configuration information, where the first configuration information is used to indicate a first correspondence between the first SSB set and the first RO set, and the second configuration information Used to indicate the second corresponding relationship between the second SSB set and the second RO set. The first RO set includes ROs located in the first BWP in the second RO set, the first BWP corresponds to the first type of terminal device, the second RO set is located in the second BWP, and the second BWP corresponds to the second type of terminal device. The transceiver module 1301 is configured to send the first configuration information and the second configuration information, and receive a random access preamble from a terminal device based on the first RO set, where the terminal device belongs to the first type of terminal device.

As an optional implementation manner, the transceiving module 1301 is further configured to receive first capability information from the terminal device, where the first capability information is used to indicate whether the terminal device supports not including the SSB in the BWP.

In other embodiments, the transceiver module 1301 is configured to send second indication information to the terminal device, where the second indication information is used to indicate that PUCCH resources do not perform frequency hopping transmission within a slot or frequency hopping transmission between slots, and the PUCCH The resource is used for the terminal device to send HARQ-ACK feedback information for random access message 4 (or random access message B). The random access message 4 or the random access message B may be used to carry the random access conflict resolution identifier, the RRC connection establishment message, and the like. The transceiving module 1301 is also configured to receive HARQ-ACK feedback information for random access message 4 (or random access message B) from the terminal device.

if

is the frequency domain offset value of the common PUCCH resource set,

As an optional implementation, the second indication information indicates that PUCCH resources are repeated between time slots and frequency hopping transmission between time slots, and the first uplink BWP and the second uplink BWP configured with the PUCCH resources are located in the communication device 1300 On both sides of the configured carrier bandwidth, for the PUCCH resource r _PUCCH , the PRB position for transmitting the PUCCH resource satisfies:

if

is the frequency domain offset value of the common PUCCH resource set,

is the size of the second initial uplink BWP (number of PRBs).

if

is the frequency domain offset value of the common PUCCH resource set,

is the size of the second uplink BWP (number of PRBs).

if

is the frequency domain offset value of the common PUCCH resource set.

if

is the frequency domain offset value of the common PUCCH resource set.

It should be understood that the processing module 1302 in the embodiment of the present application may be implemented by a processor or a processor-related circuit component, and the transceiver module 1301 may be implemented by a transceiver or a transceiver-related circuit component.

The embodiment of the present application also provides a communication system. Specifically, the communication system includes a network device and a terminal device, or may further include more network devices and a plurality of terminal devices. Exemplarily, the communication system includes a network device and a terminal device configured to implement related functions of the above embodiment in FIG. 3 . The network devices are respectively used to realize the functions of the related network devices in the embodiments of the present application, for example, to realize the functions of the related network devices in the above embodiment shown in FIG. 3 . The terminal device is used to realize the functions of the relevant terminal device in the embodiment of the present application, for example, to realize the functions of the relevant terminal device in the above embodiment shown in FIG. 3 . For details, please refer to relevant descriptions in the foregoing method embodiments, and details are not repeated here.

As shown in Figure 14, the communication device 1400 provided by the embodiment of the present application, wherein the communication device 1400 may be a network device capable of realizing the functions of the network device in the method provided by the embodiment of the present application, or the communication device 1400 may be a terminal device , can realize the function of the terminal device in the method provided by the embodiment of the present application; or, the communication device 1400 can also be a device capable of supporting the network device or the terminal device to realize the corresponding function in the method provided in the embodiment of the present application. Wherein, the communication device 1400 may be a system on a chip. In the embodiment of the present application, the system-on-a-chip may consist of chips, or may include chips and other discrete devices.

In terms of hardware implementation, the above-mentioned transceiver module 1301 may be a transceiver, and the transceiver is integrated in the communication device 1400 to form the communication interface 1410 .

The communication device 1400 includes at least one processor 1420, and the processor 1420 may be a CPU, a microprocessor, an ASIC, or one or more integrated circuits used to control the program execution of the program of this application, for implementing or supporting the communication device Step 1400 implements the functions of the network device or the terminal device in the method provided by the embodiment of the present application. For details, refer to the detailed description in the method example, and details are not repeated here.

The communication device 1400 may also include at least one memory 1430 for storing program instructions and/or data. The memory 1430 is coupled to the processor 1420 . The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules. Processor 1420 may cooperate with memory 1430 . The processor 1420 may execute program instructions and/or data stored in the memory 1430, so that the communication device 1400 implements a corresponding method. At least one of the at least one memory may be included in the processor 1420 .

The communication device 1400 may also include a communication interface 1410, using any device such as a transceiver for communicating with other devices or communication networks, such as RAN, wireless local area networks (wireless local area networks, WLAN), wired access networks, and the like. The communication interface 1410 is used to communicate with other devices through a transmission medium, so that devices used in the communication device 1400 can communicate with other devices. Exemplarily, when the communication device 1400 is a network device, the other device is a terminal device; or, when the communication device 1400 is a terminal device, the other device is a network device. The processor 1420 can utilize the communication interface 1410 to send and receive data. The communication interface 1410 may specifically be a transceiver.

In this embodiment of the present application, a specific connection medium among the communication interface 1410, the processor 1420, and the memory 1430 is not limited. In the embodiment of the present application, in FIG. 14, the memory 1430, the processor 1420, and the communication interface 1410 are connected through the bus 1440. The bus is represented by a thick line in FIG. 14, and the connection between other components is only for schematic illustration. , is not limited. The bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 14 , but it does not mean that there is only one bus or one type of bus.

In this embodiment of the application, the processor 1420 may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement Or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the methods disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor.

Memory 1430 can be ROM or other types of static storage devices that can store static information and instructions, RAM or other types of dynamic storage devices that can store information and instructions, and can also be electrically erasable programmable read-only memory (electrically erasable programmable read-only memory) read-only memory, EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc 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 media 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, without limitation. The memory may exist independently and be connected to the processor through the bus 1440 . Memory can also be integrated with the processor.

Wherein, the memory 1430 is used to store computer-executed instructions for implementing the solutions of the present application, and the execution is controlled by the processor 1420 . The processor 1420 is configured to execute the computer-executed instructions stored in the memory 1430, so as to implement the method for sending and/or receiving the random access preamble provided in the foregoing embodiments of the present application.

Optionally, the computer-executed instructions in the embodiments of the present application may also be referred to as application program codes, which is not specifically limited in the embodiments of the present application.

It should be noted that the communication device in the above embodiments may be a terminal device or a circuit, or may be a chip applied in the terminal device or other combined devices or components having the functions of the above-mentioned terminal device. When the communication device is a terminal device, the transceiver module may be a transceiver, which may include an antenna and a radio frequency circuit, etc., and the processing module may be a processor, such as a CPU. When the communication device is a component having the functions of the above-mentioned terminal equipment, the transceiver module may be a radio frequency unit, and the processing module may be a processor. When the communication device is a chip system, the communication device can be an FPGA, a dedicated ASIC, a system on chip (SoC), a CPU, or a network processor (network processor, NP). , it can also be a DSP, it can also be a microcontroller (micro controller unit, MCU), it can also be a programmable logic device (programmable logic device, PLD) or other integrated chips.

The processing module 1302 may be a processor of the system-on-a-chip. The transceiver module 1301 or the communication interface may be an input/output interface or an interface circuit of the chip system. For example, the interface circuit may be a code/data read/write interface circuit. The interface circuit can be used to receive code instructions (the code instructions are stored in the memory, can be read directly from the memory, or can also be read from the memory through other devices) and transmitted to the processor; the processor can be used to run all The above-mentioned code instructions are used to execute the methods in the above-mentioned method embodiments. For another example, the interface circuit may also be a signal transmission interface circuit between the communication processor and the transceiver.

Exemplarily, the communication device in the foregoing embodiments may be a chip, and the chip may include a logic circuit, an input/output interface, and may also include a memory. Wherein, the input-output interface can be used to receive code instructions (the code instructions are stored in the memory, can be read directly from the memory, or can also be read from the memory through other devices) and transmitted to the logic circuit; the logic circuit, It can be used to run the code instructions to execute the methods in the above method embodiments. Alternatively, the input and output interface may also be a signal transmission interface circuit between the logic circuit and the transceiver.

Fig. 15 shows a schematic structural diagram of a simplified communication device. For ease of understanding and illustration, in FIG. 15 , the communication device is a base station as an example. The base station can be applied to the system shown in FIG. 1 , and can be the network device in FIG. 1 , and execute the functions of the network device in the foregoing method embodiments.

The communication device 1500 may include a transceiver 1510 , a memory 1521 and a processor 1522 . The transceiver 1510 may be used by a communication device to perform communication, such as sending or receiving the above indication information and the like. The memory 1521 is coupled with the processor 1522 and can be used to store programs and data necessary for the communication device 1500 to realize various functions. The processor 1522 is configured to support the communication device 1500 to execute corresponding functions in the above methods, and the functions can be implemented by calling programs stored in the memory 1521 .

Specifically, the transceiver 1510 may be a wireless transceiver, and may be used to support the communication device 1500 to receive and send signaling and/or data through a wireless air interface. The transceiver 1510 may also be referred to as a transceiver unit or a communication unit, and the transceiver 1510 may include one or more radio frequency units 1512 and one or more antennas 1511, wherein the radio frequency unit is such as a remote radio unit (remote radio unit, RRU) Or an active antenna unit (active antenna unit, AAU), which can be specifically used for the transmission of radio frequency signals and the conversion of radio frequency signals and baseband signals, and the one or more antennas can be specifically used for radiating and receiving radio frequency signals. Optionally, the transceiver 1510 may only include the above radio frequency unit, then the communication device 1500 may include a transceiver 1510, a memory 1521, a processor 1522, and an antenna.

The memory 1521 and the processor 1522 can be integrated or independent of each other. As shown in FIG. 15 , the memory 1521 and the processor 1522 can be integrated into the control unit 1520 of the communication device 1500 . Exemplarily, the control unit 1520 may include a baseband unit (baseband unit, BBU) of an LTE base station, and the baseband unit may also be called a DU, or the control unit 1520 may include a DU and a DU in a base station under 5G and future wireless access technologies. /or CU. The above-mentioned control unit 1520 can be composed of one or more antenna panels, where multiple antenna panels can jointly support a wireless access network of a single access standard (such as an LTE network), and multiple antenna panels can also respectively support wireless access networks of different access standards. Radio access network (such as LTE network, 5G network or other networks). The memory 1521 and processor 1522 may serve one or more antenna panels. That is to say, the memory 1521 and the processor 1522 may be separately provided on each antenna panel. It is also possible that multiple antenna panels share the same memory 1521 and processor 1522 . In addition, necessary circuits may be provided on each antenna panel, for example, the circuits may be used to realize the coupling of the memory 1521 and the processor 1522 . The above transceiver 1510, processor 1522 and memory 1521 may be connected through a bus structure and/or other connection media.

Based on the structure shown in FIG. 15, when the communication device 1500 needs to send data, the processor 1522 can perform baseband processing on the data to be sent, and then output the baseband signal to the radio frequency unit, and the radio frequency unit performs radio frequency processing on the baseband signal and passes the radio frequency signal through the antenna. Sent in the form of electromagnetic waves. When data is sent to the communication device 1500, the radio frequency unit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1522, and the processor 1522 converts the baseband signal into data and converts the data to process.

Based on the structure shown in FIG. 15 , the transceiver 1510 can be used to perform the above steps performed by the transceiver module 1301 . And/or, the processor 1522 can be used to invoke instructions in the memory 1521 to perform the above steps performed by the processing module 1302 .

Fig. 16 shows a schematic structural diagram of a simplified terminal device. For ease of understanding and illustration, in FIG. 16 , the terminal device takes a mobile phone as an example. As shown in FIG. 16 , the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device. The processor is mainly used for processing the communication protocol and communication data, controlling the on-board unit, executing software programs, and processing data of the software programs. Memory is primarily used to store software programs and data. The radio frequency circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal. Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of equipment may not have input and output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. When data is sent to the device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 16 . In an actual device product, there may be one or more processors and one or more memories. A memory may also be called a storage medium or a storage device. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.

In the embodiment of the present application, the antenna and the radio frequency circuit having the function of transmitting and receiving can be regarded as the transmitting and receiving unit of the device, and the processor having the function of processing can be regarded as the processing unit of the device. As shown in FIG. 16 , the device includes a transceiver unit 1610 and a processing unit 1620 . The transceiver unit 1610 may also be called a transceiver, a transceiver, a transceiver device, and the like. The processing unit 1620 may also be called a processor, a processing board, a processing module, a processing device, and the like. Optionally, the device in the transceiver unit 1610 for realizing the receiving function may be regarded as a receiving unit, and the device in the transceiver unit 1610 for realizing the sending function may be regarded as a sending unit, that is, the transceiver unit 1610 includes a receiving unit and a sending unit. The transceiver unit 1610 may also be called a transceiver, a transceiver, or a transceiver circuit, etc. sometimes. The receiving unit may sometimes be called a receiver, a receiver, or a receiving circuit, etc. The sending unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit, etc.

It should be understood that the transceiving unit 1610 is used to perform the sending and receiving operations on the terminal side in the above method embodiments, and the processing unit 1620 is used to perform other operations on the terminal in the above method embodiments except the transceiving operation.

When the communication device is a chip-like device or circuit, the device may include a transceiver unit and a processing unit. Wherein, the transceiver unit may be an input-output circuit and/or a communication interface; the processing unit is an integrated processor or a microprocessor or an integrated circuit.

The embodiment of the present application also provides a computer-readable storage medium, including instructions, which, when run on a computer, cause the computer to execute the method performed by the network device and the terminal device in FIG. 3 .

An embodiment of the present application also provides a computer program product, including instructions, which, when run on a computer, cause the computer to execute the method performed by the network device and the terminal device in FIG. 3 .

An embodiment of the present application provides a system-on-a-chip, where the system-on-a-chip includes a processor and may further include a memory, configured to implement functions of the network device and the terminal device in the foregoing method. The system-on-a-chip may consist of chips, or may include chips and other discrete devices.

The methods provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it 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. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, network equipment, user equipment or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server, or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL) or wireless (such as infrared, wireless, microwave, etc.) means. 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, data center, etc. integrated with one or more available media. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), optical media (for example, digital video disc (digital video disc, DVD for short)), or semiconductor media (for example, SSD).

Those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

A method for sending a random access preamble, applied to a terminal device, the terminal device being a first-type terminal device, characterized in that it includes:

Receive first configuration information from the network device, where the first configuration information is used to indicate a first correspondence between the first SSB set and the first RO set, where the first RO set includes the first BWP located in the second RO set The RO in the first BWP corresponds to a first type of terminal device, the second RO set is located in a second BWP, and the second BWP corresponds to a second type of terminal device;

Sending a random access preamble to the network device based on the first set of ROs.
The method according to claim 1, wherein the first RO set is composed of ROs located in the first BWP in the second RO set.
The method according to claim 1 or 2, wherein the second corresponding relationship between the second RO set and the second SSB set is configured by second configuration information.
The method according to claim 3, wherein the first correspondence indicates that M SSBs are mapped to 1 RO, the second correspondence indicates that N SSBs are mapped to 1 RO, and the N and the The above M is not the same.
The method according to claim 3, wherein the first configuration information includes the number P of ROs included in the first RO set, and the first correspondence indicates that Q SSBs are mapped to the P ROs , the Q is the number of SSBs included in the second SSB set, the Q SSBs correspond to the Q random access preamble sets one by one, and the Q random access preamble sets are composed of the Q random access preamble sets It consists of at least one random access preamble associated with the P ROs.
The method according to any one of claims 1-5, wherein the first time unit and the second time unit correspond to different first RO sets.
The method according to claim 5, wherein in the first period, the index index of the starting RO in the first RO set satisfies:

index=floor((SFN*10+subframe)/Period)mod X, where X is the number of ROs included in the first RO set, SFN is the frame number of the system frame where the initial RO is located, and subframe is the number of ROs included in the first RO set. The frame number of the system subframe where the starting RO is located, and the Period is the first period.
The method according to any one of claims 1-7, wherein the method further comprises:

Sending first capability information to the network device, where the first capability information is used to indicate whether the terminal device supports not including the SSB in the BWP.
The method according to claim 8, wherein the first capability information is reported through the preamble used by the random access message 1 or the RO resource used by the random access message 1; or,

The first capability information is reported through a random access message 3; or,

The first capability information is reported through the PUCCH resource carrying the HARQ-ACK feedback information for the random access message 4.
A method for receiving a random access preamble, comprising:

Sending first configuration information and second configuration information, where the first configuration information is used to indicate a first correspondence between the first SSB set and the first RO set, and where the second configuration information is used to indicate the second SSB set and the first RO set The second corresponding relationship between two RO sets, wherein the first RO set includes ROs located in the first BWP in the second RO set, the first BWP corresponds to a first type of terminal device, and the second RO The set is located in the second BWP, and the second BWP corresponds to the second type of terminal equipment;

Receive a random access preamble from a terminal device based on the first RO set, where the terminal device is the first type of terminal device.
The method according to claim 10, wherein the first RO set is composed of ROs located in the first BWP in the second RO set.
The method according to claim 10 or 11, wherein the first correspondence indicates that M SSBs are mapped to one RO, the second correspondence indicates that N SSBs are mapped to one RO, and the N Not the same as M.
The method according to claim 10 or 11, wherein the first configuration information includes the number P of ROs included in the first RO set, and the first correspondence indicates that Q SSBs are mapped to the P RO, the Q is the number of SSBs included in the second SSB set, the Q SSBs correspond to the Q random access preamble sets one by one, and the Q random access preamble sets are It consists of at least one random access preamble associated with the P ROs.
The method according to any one of claims 10-13, wherein the first time unit and the second time unit correspond to different first RO sets.
The method according to claim 14, wherein in the first period, the index index of the starting RO in the first RO set satisfies:

index=floor((SFN*10+subframe)/Period)mod X, where X is the number of ROs included in the first RO set, SFN is the frame number of the system frame where the initial RO is located, and subframe is the number of ROs included in the first RO set. The frame number of the system subframe where the starting RO is located, and the Period is the first period.
The method according to any one of claims 10-15, further comprising:

Receive first capability information from the terminal device, where the first capability information is used to indicate whether the terminal device supports not including the SSB in the BWP.
The method according to claim 16, wherein the first capability information is reported through the preamble used by the random access message 1 or the RO resource used by the random access message 1; or,

The first capability information is reported through a random access message 3; or,

The first capability information is reported through the BWP where the PDCCH carrying the HARQ-ACK feedback information for the random access message 4 is located.
A communication device, characterized in that the communication device is a first-type terminal device, and the communication device includes a processing module and a transceiver module, wherein,

The transceiver module is configured to receive first configuration information from a network device, where the first configuration information is used to indicate a first correspondence between a first SSB set and a first RO set, and the first RO set includes a second ROs located in the first BWP in the RO set, the first BWP corresponds to the first type of terminal device, the second RO set is located in the second BWP, and the second BWP corresponds to the second type of terminal device;

The processing module is configured to determine the first RO set according to the first configuration information;

The transceiving module is further configured to send a random access preamble to the network device based on the first RO set.
The communication device according to claim 18, wherein the first RO set is composed of ROs located in the first BWP in the second RO set.
The communication device according to claim 18 or 19, wherein the second corresponding relationship between the second RO set and the second SSB set is configured by second configuration information.
The communication device according to claim 20, wherein the first correspondence indicates that M SSBs are mapped to one RO, the second correspondence indicates that N SSBs are mapped to one RO, and the N and Said M are different.
The communication device according to claim 20, wherein the first configuration information includes the number P of ROs included in the first RO set, and the first correspondence indicates that Q SSBs are mapped to the P RO, the Q is the number of SSBs included in the second SSB set, the Q SSBs correspond to the Q random access preamble sets one by one, and the Q random access preamble sets are composed of It consists of at least one random access preamble associated with the P ROs.
The communication device according to any one of claims 18-22, wherein the first time unit and the second time unit correspond to different first RO sets.
The communication device according to any one of claims 18-23, wherein the transceiver module is further used for:

Sending first capability information to the network device, where the first capability information is used to indicate whether the communication device supports not including the SSB in the BWP.
The communication device according to claim 24, wherein the first capability information is reported through the preamble used by the random access message 1 or the RO resource used by the random access message 1; or,

The first capability information is reported through a random access message 3; or,

The first capability information is reported through the PUCCH resource carrying the HARQ-ACK feedback information for the random access message 4.
A communication device, characterized in that the communication device includes a processing module and a transceiver module, wherein,

The processing module is configured to determine first configuration information and second configuration information, wherein the first configuration information is used to indicate a first correspondence between the first SSB set and the first RO set, and the second configuration information Used to indicate the second corresponding relationship between the second SSB set and the second RO set, where the first RO set includes ROs in the first BWP in the second RO set, and the first BWP corresponds to the first RO set A type of terminal device, the second RO set is located in a second BWP, and the second BWP corresponds to a second type of terminal device;

The transceiver module is configured to send first configuration information and second configuration information, and receive a random access preamble from a terminal device based on the first RO set, where the terminal device belongs to the first type of terminal device.
The communication device according to claim 26, wherein the first RO set is composed of ROs located in the first BWP in the second RO set.
The communication device according to claim 26 or 27, wherein the first correspondence indicates that M SSBs are mapped to 1 RO, and the second correspondence indicates that N SSBs are mapped to 1 RO, and the N is different from said M.
The communication device according to claim 26 or 27, wherein the first configuration information includes the number P of ROs included in the first RO set, and the first correspondence indicates that Q SSBs are mapped to the P ROs, the Q is the number of SSBs included in the second SSB set, the Q SSBs are in one-to-one correspondence with the Q random access preamble sets, and the Q random access preamble sets is composed of at least one random access preamble associated with the P ROs.
The communication device according to any one of claims 26-29, wherein the first time unit and the second time unit correspond to different first RO sets.
The communication device according to any one of claims 26-30, wherein the transceiver module is further used for:

Receive first capability information from the terminal device, where the first capability information is used to indicate whether the terminal device supports not including the SSB in the BWP.
The communication device according to claim 31, wherein the first capability information is reported through the preamble used by the random access message 1 or the RO resource used by the random access message 1; or,

The first capability information is reported through a random access message 3; or,

The first capability information is reported through the BWP where the PDCCH carrying the HARQ-ACK feedback information for the random access message 4 is located.
A communication device, characterized in that the communication device includes a processor, a communication interface, and a memory, the processor is coupled to the communication interface, and is used to invoke computer instructions in the memory to make the communication device execute such as The method according to any one of claims 1-9.
A communication device, characterized in that the communication device includes a processor, a communication interface, and a memory, the processor is coupled to the communication interface, and is used to invoke computer instructions in the memory to make the communication device execute such as The method according to any one of claims 10-17.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores computer instructions, and when the computer instructions are executed, the computer executes the method described in any one of claims 1-9. method, or causing the computer to execute the method according to any one of claims 10-17.