CN115884394A

CN115884394A - Sending method, receiving method and communication device of random access preamble

Info

Publication number: CN115884394A
Application number: CN202111144177.5A
Authority: CN
Inventors: 侯海龙; 金哲; 罗之虎; 王轶
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2023-03-31
Also published as: WO2023051324A1

Abstract

The application discloses a sending method, a receiving method and a communication device of random access preamble, wherein the method comprises the following steps: the network device sends first configuration information to the terminal device, wherein the first configuration information indicates a corresponding relation between a first SSB set and a first RO set, and the first RO set comprises the RO located in a first BWP corresponding to the first type terminal device in a second RO set. The second RO set is located in a second BWP corresponding to the second type of terminal device. The first type of terminal device transmits a random access preamble based on the first set of ROs. In this scheme, the network device may separately configure the corresponding relationship between the SSB set and the RO set for different types of terminal devices, so that the ROs in the corresponding relationship between the SSB set and the RO set configured for a certain type of terminal device are all located within the maximum bandwidth supported by the terminal device of that type. No matter which SSB is selected by the terminal equipment, the RO determined according to the selected SSB can be used, so that the failure times of random access are reduced, and the efficiency of accessing the network is improved.

Description

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

Technical Field

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

Background

In order to realize data transmission between the terminal device and the network device, the terminal device establishes connection with the network device through a random access process. When the terminal device performs the random access process, it will send a random access preamble to the network device to initiate the random access process. Before a terminal device initiates a random access procedure, a synchronization signal and Physical Broadcast Channel (PBCH) block (SSB) may be selected from a plurality of SSBs, and a random access preamble may be transmitted on a random access channel (RO) associated with the SSB.

Currently, 8 ROs can be multiplexed in the frequency domain, and all the multiplexed ROs should be located within a 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, as services are diversified, two types of terminal devices with different capabilities, such as a common terminal device and a machine type terminal device, may exist in one system. Compared with the common terminal equipment, the machine type terminal equipment has weaker capability and can be suitable for services with low requirements on data transmission rate. The maximum bandwidth supported by the common terminal equipment and the machine type terminal equipment are different. The total bandwidth of ROs available to normal terminal devices may exceed the maximum bandwidth of machine type terminal devices. 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 obvious that the RO cannot be used to initiate random access, resulting in that the machine type terminal device cannot access the network. Therefore, how to configure the random access resource of the terminal device becomes a technical problem that needs to be solved urgently.

Disclosure of Invention

The application provides a sending method, a receiving method and a communication device of random access preambles, which are used for reducing the random access failure of terminal equipment and improving the network access efficiency of the terminal equipment.

In a first aspect, a method for sending a random access preamble may be performed by a first communication apparatus, which may be a communication device or a communication apparatus capable of supporting a communication device to implement functions required by the method, such as a chip system. The following description will take the communication device as the first terminal device, and the first terminal device as the first type terminal device as an example. The method comprises the following steps: the terminal device receives first configuration information from the network device, wherein the first configuration information is used for indicating a first corresponding relationship between a first SSB set and a first RO set, and the first RO set comprises the RO located in a first BWP in a second RO set. The first BWP corresponds to a first class of terminal devices, the second RO set is located at a second BWP, and the second BWP corresponds to a second class of terminal devices. And the terminal equipment sends a random access preamble to the network equipment based on the first RO set, wherein the terminal equipment is first-class terminal equipment.

In this embodiment, the network device may independently configure the correspondence 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, where the BWP of the first type of terminal device is a first BWP, and the BWP of the second type of terminal device is a second BWP. The network device may configure the second type of terminal device with a second RO set comprising ROs all located in the second BWP, and configure the first type of terminal device with a first RO set comprising ROs all located in the first BWP, for example, the first RO set is composed of ROs in the second RO set located in the first BWP. That is, the ROs in the corresponding relationship between the SSB set and the RO set configured for a certain type of terminal device are all located within the maximum bandwidth supported by the terminal device of that type. Therefore, no matter which SSB is selected by the terminal equipment, the RO determined according to the selected SSB can be used, so that the failure times of random access are reduced, and the efficiency of accessing the network is improved.

In a possible implementation manner, the second corresponding relationship between the second set of ROs and the second set of SSBs is configured by the second configuration information. It is 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 corresponding relationship indicates that M SSBs are mapped to 1 RO, the second corresponding relationship indicates that N SSBs are mapped to 1 RO, and N and M are different. The scheme can follow the way of configuring the corresponding relation between the SSB set and the RO set at present, that is, mapping N SSBs to 1 RO can be configured for the second type of terminal device. Similarly, for the first type of terminal device, the way of configuring the correspondence between SSB set and RO set at present can still be followed, except that the first correspondence is that M SSBs are mapped to 1 RO, so that all ROs included in the first RO set are located in the first BWP. The scheme does not need to modify the signaling structure for bearing 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 a number P of ROs included in the first set of ROs, and the first correspondence indicates that Q SSBs are mapped to P ROs. And 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 are composed of at least one random access preamble associated with the P ROs. The scheme appoints that all random access lead codes corresponding to a first RO set are grouped according to the number Q of SSBs included in a second SSB set, namely all random access lead codes included in the first RO set are divided into Q random access lead code sets. Q SSBs correspond to Q sets of random access preambles one to one. Since the first RO set corresponds to Q random access preamble sets, that is, the first RO set includes P ROs and Q random access preamble sets having a corresponding relationship. Therefore, the network device and the terminal device may determine the correspondence of the P ROs to the Q SSBs based on the correspondence of the P ROs in the first set of ROs to the Q sets of random access preambles. The scheme does not limit the value of M, namely, no matter what value of M is taken, all the ROs in the first RO set have associated SSBs, so that the RO utilization rate can be improved.

In a possible implementation, the first time unit and the second time unit correspond to different first RO sets. In this scheme, the first set of ROs allowed for the first type of terminal device to use in different time units are different, that is, the ROs included in the first set of ROs may change in different time susceptances. Because the ROs in the first RO set change in different time units, the first class of terminal devices can be prevented from always affecting the second class of terminal devices in the SSB beam direction associated with some fixed ROs, so as to balance the random access performance of the first class of terminal devices and the second class of terminal devices.

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

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

In one possible implementation, the method further includes: the terminal device sends first capability information to the network device, wherein the first capability information is used for indicating whether the terminal device supports the situation that no SSB is contained in BWP. In the scheme, the terminal device notifies the network device through the first capability information, and whether the terminal device supports BWP without SSB, so that the network device and the terminal device are consistent for BWP in which the terminal device can operate, and when the terminal device does not support BWP without SSB, the network device configures BWP without SSB for the terminal device, or the network device transmits data to the terminal device through BWP without SSB.

In a possible implementation manner, the first capability information is reported through a preamble used by the random access message 1 or through an 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 a Physical Uplink Control Channel (PUCCH) resource carrying hybrid automatic repeat request-acknowledgement (HARQ-ACK) feedback information for the random access message 4. The scheme provides various implementation forms of the first capability information, and particularly uses which implementation form.

In a second aspect, a method for receiving a random access preamble may be performed by a second communication apparatus, which may be a communication device or a communication apparatus capable of supporting a communication device to implement functions required by the method, such as a chip system. The following description will be given taking the communication device as a network device as an example. The method comprises the following steps:

the network device sends the first configuration information and the second configuration information. The first configuration information is used for indicating a first corresponding relation between the first SSB set and the first RO set, and the second configuration information is used for indicating a second corresponding relation between the second SSB set and the second RO set. The first RO set comprises the RO in the first BWP in the second RO set, the first BWP corresponds to the first type terminal device, the second RO set is in the second BWP, the second BWP corresponds to the second type terminal device. Thereafter, the network device receives a random access preamble from a terminal device based on the first set of ROs, the terminal device belonging to a first class of terminal devices.

In a possible implementation, the first set of ROs consists of ROs in the second set of ROs that are located within the first BWP.

In a possible implementation manner, 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 N and M are different.

In a possible implementation manner, the first configuration information includes a number P of ROs included in the first set of ROs, 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 to one, and the Q random access preamble sets are composed of at least one random access preamble associated with P ROs.

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

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

index = floor ((SFN X10 + subframe)/Period) mod X, where X is the number of ROs included in the first set of ROs, SFN is the frame number of the system frame where the starting RO is located, subframe is the frame number of the system subframe where the starting RO is located, and Period is the first Period.

In a possible implementation, the method further comprises: the network device receives first capability information from the terminal device, wherein the first capability information is used for indicating whether the terminal device supports BWP and does not contain SSB.

In a possible implementation manner, the first capability information is reported through a preamble used by the random access message 1 or through an 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 message4 is located.

With regard to the technical effects brought by the second aspect or various possible embodiments of the second aspect, reference may be made to the description of the technical effects of the first aspect or various embodiments of the first aspect, which is not repeated here.

In a third aspect, a method for transmitting a random access preamble is provided, which may be performed by a first communication apparatus, which may be a communication device or a communication apparatus capable of supporting a communication device to implement functions required by the method, such as a chip system. The following description will be given taking the communication device as a terminal device as an example. The method comprises the following steps:

and the terminal equipment receives second indication information from the network equipment, wherein the second indication information is used for indicating that PUCCH resources do not carry out intra-slot frequency hopping transmission or inter-slot frequency hopping transmission, and the PUCCH resources are used for the terminal equipment to send HARQ-ACK feedback information aiming at the random access message4 (or the random access message B). The random access message4 or the random access message B may be used to carry a random access collision resolution identity, an RRC connection setup message, and the like. After that, the terminal device transmits HARQ-ACK feedback information for the random access message4 (or the random access message B) on the PUCCH resource according to the second indication information.

In a possible implementation manner, the second indication information indicates that the PUCCH resource does not perform intra-slot frequency hopping transmission, the BWP configured with the PUCCH resource is located on one side of the carrier bandwidth configured with the terminal device, and for the PUCCH resource r _PUCCH And the PRB position for transmitting the PUCCH resource meets the following conditions:

wherein r is _PUCCH For PUCCH resource index, ncs is the number of cyclic shifts of the common PUCCH resource set, and->

A frequency domain offset value for a set of common PUCCH resources.

In a possible implementation manner, the second indication information indicates that the PUCCH resource does not perform intra-slot frequency hopping transmission, and the first uplink BWP and the second uplink BWP configured with the PUCCH resource are respectively located on two sides of the carrier bandwidth configured by the terminal device, and for the PUCCH resource r _PUCCH And the PRB position for transmitting the PUCCH resource meets the following conditions:

if it is not

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

if->

Using the PUCCH resource in the second uplink BWP, the PRB position for transmitting the PUCCH satisfies: />

Wherein r is _PUCCH For PUCCH resource index, N _CS For the number of cyclic shifts of a common PUCCH resource set, <' > H>

As a common PUCCH resourceThe frequency domain offset value of the set, <' > or>

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

In a possible implementation manner, the second indication information indicates that the PUCCH resource is repeated between slots and is transmitted in frequency hopping between slots, the first uplink BWP and the second uplink BWP configured with the PUCCH resource are located on two sides of the carrier bandwidth configured by the terminal device, and for the PUCCH resource r _PUCCH And the PRB position for transmitting the PUCCH resource meets the following conditions:

if it is not

The first hop PUCCH uses PUCCH resources in the first uplink BWP, and the PRB position of the transmission PUCCH meets the following conditions: />

The second hop PUCCH uses PUCCH resources in the second uplink BWP, and the PRB position of the transmission PUCCH meets the following conditions: />

Wherein r is _PUCCH For PUCCH resource index, N _CS For the number of cyclic shifts of a common PUCCH resource set, based on the number of cyclic shifts in the common PUCCH resource set>

Frequency domain offset value, <' > for a set of common PUCCH resources>

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

If it is not

The first-hop PUCCH uses PUCCH resources in the second uplink BWP, and the PRB position of the transmission PUCCH meets the following conditions: />

The second hop PUCCH uses PUCCH resources in the first uplink BWP, and the PRB position of the transmission PUCCH meets the following conditions: />

A frequency domain offset value for a set of common PUCCH resources,

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

if it is not

A frequency domain offset value for a common PUCCH resource set.

If it is used

A frequency domain offset value for a common PUCCH resource set.

In a fourth aspect, a method for transmitting a random access preamble is provided, which may be performed by a first communication apparatus, which may be a communication device or a communication apparatus capable of supporting a communication device to implement functions required by the method, such as a chip system. The following description takes the communication device as a network device as an example. The method comprises the following steps:

and the network equipment sends second indication information to the terminal equipment, wherein the second indication information is used for indicating that PUCCH resources do not carry out intra-slot frequency hopping transmission or inter-slot frequency hopping transmission, and the PUCCH resources are used for sending HARQ-ACK feedback information aiming at the random access message4 (or the random access message B) by the terminal equipment. The random access message4 or the random access message B may be used to carry a random access collision resolution identifier, an RRC connection setup message, and the like. After that, the network device receives HARQ-ACK feedback information for random access message4 (or random access message B) from the terminal device.

In a possible implementation manner, the second indication information indicates that the PUCCH resource does not perform intra-slot frequency hopping transmission, the BWP configured with the PUCCH resource is located on one side of the carrier bandwidth configured with the terminal device, and for the PUCCH resource r _PUCCH PR transmitting the PUCCH resourceThe B position satisfies:

A frequency domain offset value for a set of common PUCCH resources.

In a possible implementation manner, the second indication information indicates that the PUCCH resource is not subjected to intra-slot frequency hopping transmission, the first uplink BWP and the second uplink BWP configured with the PUCCH resource are respectively located on two sides of the carrier bandwidth configured by the terminal device, and for the PUCCH resource r _PUCCH And the PRB position for transmitting the PUCCH resource meets the following conditions:

if it is not

if->

Using PUCCH resources in the second uplink BWP, the PRB position of the transmission PUCCH satisfies the following conditions: />

Frequency domain offset value, <' > for a set of common PUCCH resources>

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

In possible implementation mannersThe second indication information indicates that the PUCCH resources are repeated between slots and subjected to inter-slot frequency hopping transmission, the first uplink BWP and the second uplink BWP configured with the PUCCH resources are positioned at two sides of a carrier bandwidth configured with the terminal equipment, and for the PUCCH resource r _PUCCH And the PRB position for transmitting the PUCCH resource meets the following conditions:

if it is used

Frequency domain offset values for a common PUCCH resource set, greater than or equal to>

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

If it is used

A frequency domain offset value for a common PUCCH resource set,

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

if it is not

A frequency domain offset value for a set of common PUCCH resources.

If it is not

A frequency domain offset value for a common PUCCH resource set.

In a fifth aspect, an embodiment of the present application provides a communication device, where the communication device has a function of implementing a behavior in the method example of the first aspect or the third aspect, and for beneficial effects, reference may be made to the description of the first aspect or the third aspect, which is not described herein again. The communication apparatus may be the terminal device in the first aspect or the third aspect, or the communication apparatus may be an apparatus, such as a chip or a chip system, capable of supporting the functions required by the terminal device in the first aspect to implement the method provided in the first aspect. Alternatively, the communication device may be a device, such as a chip or a system of chips, capable of supporting the functions required by the terminal equipment in the third aspect to implement the method provided by the third aspect.

In one possible design, the communication device includes respective means (means) or modules for performing the method of the first or third aspect. For example, the communication device: including a processing unit (also sometimes referred to as a processing module or processor) and/or a transceiver unit (also sometimes referred to as a transceiver module or transceiver). These units (modules) may perform corresponding functions in the method example of the first aspect or the third aspect, for specific reference, detailed description in the method example is omitted here for brevity.

In a sixth aspect, an embodiment of the present application provides a communication device, where the communication device has a function of implementing a behavior in the example of the method in the second aspect or the fourth aspect, and for beneficial effects, reference may be made to descriptions of the second aspect or the fourth aspect, which are not described herein again. The communication apparatus may be the network device in the second aspect or the fourth aspect, or the communication apparatus may be an apparatus, such as a chip or a chip system, capable of supporting the functions required by the network device in the second aspect to implement the method provided by the second aspect. Alternatively, the communication device may be a device, such as a chip or a system of chips, capable of supporting the functions required by the network apparatus in the fourth aspect to implement the method provided by the fourth aspect.

In one possible design, the communication device includes corresponding means (means) or modules for performing the method of the second or fourth aspect. For example, the communication device: including a processing unit (also sometimes referred to as a processing module or processor) and/or a transceiving unit (also sometimes referred to as a transceiving module or transceiver). These units (modules) may perform corresponding functions in the method example of the second aspect or the fourth aspect, for specific reference, detailed description in the method example is omitted here for brevity.

In a seventh aspect, an embodiment of the present application provides a communication device, which may be the communication device in the fifth aspect or the sixth aspect of the foregoing embodiments, or a chip system provided in the communication device in the fifth aspect or the sixth aspect. The communication device comprises a communication interface, a processor and optionally a memory. Wherein the memory is used for storing computer programs or instructions or data, the processor is coupled with the memory and the communication interface, and when the processor reads the computer programs or instructions or data, the processor causes the communication device to execute the method executed by the terminal device in the above method embodiments or execute the method executed by the network device in the above method embodiments.

In an eighth aspect, an embodiment of the present application provides a communication device, which includes an input/output interface and a logic circuit. The input/output interface is used for inputting and/or outputting information. The logic circuitry is configured to perform the method of any one of the first to fourth aspects.

In a ninth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor, and may further include a memory and/or a communication interface, and is configured to implement the method described in any one of the first aspect to the fourth aspect. In one possible implementation, the chip system further includes a memory for storing a computer program. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

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

In an eleventh aspect, the present application provides a computer-readable storage medium storing a computer program which, when executed, implements the method of any one of the first to fourth aspects.

In a twelfth aspect, there is provided a computer program product comprising: computer program code which, when executed, causes the method of any of the first to fourth aspects described above to be performed.

Advantageous effects of the above-described fifth to twelfth aspects and implementations thereof may refer to the description of the advantageous effects of the first or third aspect, or the first or third aspect and implementations thereof.

Drawings

Fig. 1 is a schematic diagram of association between 8 ROs and 8 SSBs provided in this embodiment of the present application;

FIG. 2 is a schematic diagram of a network architecture suitable for use in the embodiments of the present application;

fig. 3 is a flowchart illustrating a method for sending a random access preamble and a method for receiving the random access preamble according to an embodiment of the present application;

fig. 4 is a schematic diagram of a first corresponding relationship and a second corresponding relationship provided in the embodiment of the present application;

fig. 5 is another schematic diagram of the first corresponding relationship and the second corresponding relationship provided in the embodiment of the present application;

fig. 6 is a schematic diagram of multiplexing ROs by different types of terminal devices according to an embodiment of the present application;

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

fig. 8 is a schematic diagram of frequency hopping transmission of PUCCH resources under a coexistence condition of a first type of terminal device and a second type of terminal device according to an embodiment of the present application;

fig. 9 is a diagram illustrating first transmission of a PUCCH according to an embodiment of the present application;

fig. 10 is a diagram illustrating a second transmission of a PUCCH according to an embodiment of the present application;

fig. 11 is a diagram illustrating a third transmission of a PUCCH according to an embodiment of the present application;

fig. 12 is a diagram illustrating a fourth transmission of a PUCCH according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a communication device according to an embodiment of the present application;

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

fig. 15 is an exemplary structural diagram of a communication device according to an embodiment of the present application;

fig. 16 is an exemplary schematic structural diagram of another communication apparatus provided in an embodiment of the present application.

Detailed Description

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

1) The network device is an access device that the terminal device accesses to the mobile communication system in a wireless manner, and includes, for example, a Radio Access Network (RAN) device, such as a base station (e.g., an access point). The network device may also refer to a device that communicates with the terminal at an air interface, such as other possible terminal apparatuses; also for example, a network device in a vehicle to everything (V2X) technology is a Road Side Unit (RSU). The base station may be configured to interconvert the received air frame with an Internet Protocol (IP) packet as a router between the terminal and the rest of the radio access network, where the rest of the radio access network may include an IP network. The RSU may be a fixed infrastructure entity supporting V2X applications and may exchange messages with other entities supporting V2X applications. The network device may also coordinate attribute management for the air interface. For example, the network device may include an evolved Node B (evolved Node B) in a Long Term Evolution (LTE) system or a long term evolution-advanced (LTE-a) system, which may also be referred to as (eNB or e-NodeB); or may also include a next generation node B (gNB) in a New Radio (NR) system; or may also include an access node in a wireless-fidelity (Wi-Fi) system, etc.; or the Network device may be a relay station, a vehicle-mounted device, and a Public Land Mobile Network (PLMN) device of future evolution, a device in a device-to-device (D2D) Network, a device in a machine-to-machine (M2M) Network, a device in an IoT Network, and the like. The embodiment of the present application does not limit the specific technology and the specific device form adopted by the wireless network device. For example, the network device may correspond to an eNB in a fourth generation mobile communication technology (4G) system and correspond to a gNB in a 5G system.

In addition, the base station in the embodiment of the present application may include a Centralized Unit (CU) and a Distributed Unit (DU), and a plurality of DUs may be centrally controlled by one CU. The CU and the DU may be divided according to the protocol layer functions of the wireless network, for example, functions of a Packet Data Convergence Protocol (PDCP) layer and protocol layers above the PDCP layer are provided in the CU, and functions of protocol layers below the PDCP layer, for example, a Radio Link Control (RLC) layer and a Medium Access Control (MAC) layer, are provided in the DU. It should be noted that this division of the protocol layers is only an example, and may be divided in other protocol layers. The radio frequency device may 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 (CP) and the User Plane (UP) of the CU may be separated and implemented by being divided into different entities, namely, a control plane CU entity (CU-CP entity) and a user plane CU entity (CU-UP entity). In the network architecture, signaling generated by CUs may be sent to terminal devices through DUs, or signaling generated by UEs may be sent to CUs through DUs. The DU may pass through the UE or CU directly through protocol layer encapsulation without parsing the signaling. In the network architecture, the CU is used as a network device on the RAN side, and the CU may also be used as a network device on the Core Network (CN) side, which is not limited in the present application.

The network device may also include a core network device including, for example, an access and mobility management function (AMF) or a User Plane Function (UPF), etc. Since the embodiments of the present application mainly relate to access network devices, hereinafter, unless otherwise specified, all the network devices refer to access network devices.

In the embodiment of the present application, the apparatus for implementing the function of the network device may be a network device, or may be an apparatus capable of supporting the network device to implement the function, for example, a system on chip, and the apparatus may be installed in the network device. In the technical solution provided in the embodiment of the present application, a device for implementing a function of a network device is taken as an example, and the technical solution provided in the embodiment of the present application is described.

2) The terminal device, which is a device with a wireless transceiving function, may transmit signals to a network device or receive signals from the network device. A terminal device may be referred to as a User Equipment (UE), and is sometimes referred to as a terminal, an access station, a UE station, a distant station, a wireless communication device, or a user equipment, etc. The terminal device is used for connecting people, objects, machines and the like, and can be widely used in various scenes, such as but not limited to the following scenes: cellular communication, D2D, V2X, machine-to-machine/machine-type communication (M2M/MTC), internet of things (IoT), virtual Reality (VR), augmented Reality (AR), industrial control (industrial control), unmanned driving (self driving), remote medical (remote medical), smart grid (smart grid), smart furniture, smart office, smart wear, smart transportation, city (smart city), unmanned aerial vehicle, robot, etc. That is to say, the terminal device in the embodiment of the present application may be a device related to one or more of the above scenarios. By way of example and not limitation, in embodiments of the present application, the terminal device may also be a wearable device, such as glasses, gloves, watches, apparel, shoes, and the like. The end devices may also include relays (relays), for example, the end devices may be Customer Premises Equipment (CPE) that may receive signals from the network devices and forward the signals to other end devices. Or, it is understood that any device capable of data communication with a base station may be considered a terminal device. The various terminal devices described above, if located on a vehicle (e.g. placed in or mounted in a vehicle), may be considered as vehicle-mounted terminal devices, also referred to as on-board units (OBUs), for example.

In addition, in this embodiment, the terminal device may refer to a device for implementing a function of the terminal, or may be a device capable of supporting the terminal device to implement the function, such as a chip system, and the device may be installed in the terminal device. The terminal device may also be a vehicle detector, for example. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. In the technical solution provided in the embodiment of the present application, a device for implementing a function of a terminal is taken as an example of a terminal device, and the technical solution provided in the embodiment of the present application is described.

Terminals can be classified into a plurality of types of terminals according to the types of services supported by the terminals. Such as low complexity or low power (REDCAP) terminal devices and non-low complexity or non-REDuced CAPability terminal devices. Non-low complexity or non-reduced capability terminal devices, such as enhanced mobile broadband (eMBB) terminal devices) may also be referred to as normal terminal devices, or legacy (legacy) terminal devices. The REDCAP terminal device may also be referred to as an (NR light, NRL) terminal, i.e. a lightweight version of the terminal device. Compared with legacy terminal equipment, the REDCAP terminal equipment has lower complexity than legacy terminal equipment in terms of bandwidth, power consumption, number of antennas and the like.

Two types of terminal devices can be considered to exist in the embodiment of the application. For example, a first class of terminal devices, i.e., low complexity terminal devices. The second type of terminal device may be a terminal device other than a low complexity terminal device. The distinction between the first type of terminal device and the second type of terminal device comprises at least one of:

1. the bandwidth capabilities are different. The maximum bandwidth supported by the first class of terminal device may be less than the maximum bandwidth supported by the second class of terminal device. For example, the second type of terminal device may support communication with the network device using 100MHz frequency domain resources on one carrier at the maximum, while the first type of terminal device may support communication with the network device using 20MHz frequency domain resources or less than 20MHz on one carrier at the maximum.

2. The number of the 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 device may support 2 receive and 1 transmit (2 receive antennas and 1 transmit antenna), or 1 receive and 1 transmit (1 receive antenna and 1 transmit antenna). The second class of terminal devices may support 4 receive and 2 transmit (4 receive antennas and 2 transmit antennas).

3. The maximum uplink transmission power is different. The uplink maximum transmitting power of the first type terminal equipment is smaller than that of the second type terminal equipment.

4. The protocol versions are different. The first class of terminal devices may be considered terminal devices in NR version 17 (release-17, rel-17) or in later versions of NR Rel-17. The second class of terminal devices may be terminal devices in NR version 15 (release-15, rel-15) or NR version 16 (release-16, rel-16).

5. Carrier Aggregation (CA) capabilities differ. For example, a first class of terminal devices may not support carrier aggregation, while a second class of terminal devices may support carrier aggregation; for another example, the terminal devices of the second type and the terminal devices of the first type both support carrier aggregation, but the maximum number of cells for carrier aggregation simultaneously supported by the terminal devices of the first type is less than the maximum number of cells for carrier aggregation simultaneously supported by the terminal devices of the second type.

6. Frequency Division Duplex (FDD) capabilities differ. For example, a first class of terminal devices supports only half-duplex FDD, while a second class of terminal devices supports full-duplex FDD.

7. The processing time capabilities for the data are different, for example, the minimum time delay between the first type of terminal device receiving the downlink data and sending the feedback for the downlink data is greater than the minimum time delay between the second type of terminal device receiving the downlink data and sending the feedback for the downlink data.

8. The processing power (ability/capability) differs. 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 maximum number of MIMO layers supported by the terminal device during data transmission, the number of HARQ processes supported by the terminal device, and the maximum Transport Block Size (TBS) supported by the terminal device.

9. The peak rates of uplink and/or downlink transmissions are different. The transmission peak rate refers to a maximum data transmission rate that the terminal device can achieve per unit time (e.g., 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 buffers (buffers) are of different sizes. Buffer can be understood as the total size of Layer 2 (L2) buffer, which is defined as the sum of the number of bytes buffered in the RLC transmission window and reception and reordering window and the number of bytes buffered in the PDCP reordering window for all radio bearers by the terminal device. Alternatively, the buffer may also be understood as the total number of soft channel bits that can be used by a Hybrid Automatic Repeat reQuest (HARQ) process.

Of course, the above is only an example, and there may be other differences between the first type terminal device and the second type terminal device. In addition to the previous differences, there may be other differences, for example, the first type of terminal device supports coverage enhancement, and the second type of terminal device does not support coverage enhancement; for another example, the first type of terminal device supports packet transmission, and the second type of terminal device does not support packet transmission, which are not illustrated one by one here.

3) BWP refers to a segment of continuous frequency resources in the frequency domain. BWPs can be divided into upstream BWPs and downstream BWPs. The upstream BWP is used for upstream transmission by the terminal device, and the bandwidth of the upstream BWP may exceed the transmission bandwidth capability of the terminal device. The downstream BWP is used for downstream reception by the terminal device, and the bandwidth of the downstream BWP may exceed the receiving bandwidth capability of the terminal device. In this embodiment, the bandwidth capability of the terminal device may be a channel bandwidth (also referred to as bandwidth for short) supported by the terminal device, or a maximum channel bandwidth supported by the terminal device, or a number of Resource Blocks (RBs) supported by the terminal device, or a maximum number of resource blocks supported by the terminal device. It can be appreciated that the bandwidth of BWP does not exceed the maximum bandwidth of the end device. The bandwidth of the BWP of the first class of terminal devices may exceed the bandwidth capability of the second class of terminal devices, i.e. exceed the maximum bandwidth supported by the second class of terminal devices.

One end device may be configured with one or more BWPs, but during the same time period, the end device can only operate with one BWP, which may also be considered as the BWP activated by the end device. When the terminal device is configured with a plurality of BWPs, the terminal device may switch between the plurality of BWPs. The BWP used by the terminal device to initially access the network may be referred to as an initial BWP, e.g., an initial downlink BWP or an initial uplink BWP.

4) "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a alone, A and B together, and B alone, wherein A and B may be singular or plural. The character "/" generally indicates 44. The contextual object is an "or" relationship. "at least one of the following" or similar expressions refer to any combination of the ten items, including single item(s) or any combination of plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

And, unless stated to the contrary, the embodiments of the present application refer to the ordinal numbers "first", "second", etc., for distinguishing a plurality of objects, and do not limit the sequence, timing, priority, or importance of the plurality of objects. For example, the first class and the second class are only for distinguishing different types, and do not indicate a difference in priority or importance or the like between the two types. In the embodiment of the application, "if" and "if" can be replaced, if not specifically stated, "when 8230the \ 8230, and" in the case of 8230, can be replaced. In the embodiment of the present application, the preamble may also be referred to as a random access request, a preamble carried by a Physical Random Access Channel (PRACH), an RACH preamble, a random access message 1 (message 1, msg 1), a message a (message a, msgA), or the like. The random access message3 is also referred to as message3 (message 3, msg 3), and the collision resolution message is also referred to as random access message4 (message 4, msg 4). The corresponding relationship between the SSB set and the RO set is also referred to as an association relationship between the SSB set and the RO set, or a mapping relationship between the SSB set and the RO set.

The technical solution provided in the embodiment of the present application may be applied to a fifth generation (5G) mobile communication system, such as an NR system, or may be applied to an LTE system, or may also be applied to a next generation mobile communication system or other similar communication systems, which is not limited specifically.

Please refer to fig. 1, which illustrates a network architecture applied in the embodiment of the present application. Included in fig. 1 are a network device and 6 terminal devices, which 6 terminal devices may be cellular phones, smart phones, laptops, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable device for communicating over a wireless communication system, and each may be connected to the network device. These 6 terminal devices are each capable of communicating with a network device. Of course, the number of terminal devices in fig. 2 is only an example, and may be fewer or more. It should be noted that fig. 1 is only an illustration, and the embodiment of the present application does not limit the types of devices included in the communication system, for example, the communication system may further include other network devices, such as a wireless relay device, a wireless backhaul device, and the like.

The foregoing describes some technical terms related to the embodiments of the present application and a network architecture to which the embodiments of the present application are applicable, and the following describes technical features related to the embodiments of the present application.

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

In NR, multi-beam operation is introduced and a random access procedure is transmitted on a beam basis. For example, NR systems support network devices to transmit SSBs on multiple beams. For example, in Frequency Range (FR) 1, the network device can support 8 SSBs at most, that is, the network device can send 8 SSBs to the terminal device. After receiving the multiple SSBs from the network device, the terminal device may select one SSB from the multiple SSBs, for example, select an SSB with higher received power, and send a preamble based on a beam of the SSB. At present, a mapping relationship between the SSB and the RO is defined, and the network device can determine which SSB beam the terminal device selects for transmitting the preamble through the preamble transmitted by the terminal device and the RO.

The mapping relationship between the SSB and the RO is configured by the network device through high-level parameters, which mainly include "msg1-FDM" and "SSB-perRACH-OccasionindCB-PreamblesPerSSB". Parameter msg1-FDM basically defines that there are multiple ROs on the frequency domain resource, for example, there are P ROs, where P is an integer greater than or equal to 1, for example {1,2,4,8}. The parameter SSB-perRACH-occupancy and cb-preamble PerssB mainly defines N SSB mappings (which can also be considered to be associated) to one RO and R preambles to one SSB. For example, when N is less than 1, 1 SSB maps 1/N ROs; when N is greater than 1, N SSBs map 1 RO (it can also be said that 1 SSB maps 1/N RO). For example, when N =1/2, one SSB maps 2 ROs, and when N =2, 2 SSBs map 1 RO. That is, one SSB may map one or more ROs, and one RO may also map one or more SSBs. Each SSB will map to R consecutive preambles on the RO to which the SSB maps. If multiple SSBs are mapped to a RO, the preamble start index (sequence number) associated with each SSB is

Wherein n is the relative sequence number of the SSB in the SSBs sent by the network device, and->

The maximum number of preambles multiplexed on each RO. SSB maps to RO based on the following order: firstly, mapping according to the sequence of increasing preamble serial numbers in an RO; secondly, mapping according to the increasing sequence of the frequency domain resource indexes of at least one RO of the frequency domain multiplexing; thirdly, mapping according to the sequence of increasing time domain resource indexes of at least one RO of time division multiplexing in one PRACH time slot; and finally, mapping according to the increasing sequence of the PRACH time slot indexes.

It is currently specified that a maximum of 8 ROs are multiplexed in the frequency domain, and all the multiplexed ROs should be located within a BWP configured for a terminal device, and the bandwidth of the BWP does not include the maximum bandwidth of the terminal device. Due to the difference in bandwidth capabilities of the first class of terminal device and the second class of terminal device, when the first class of terminal device and the second class of terminal device coexist, the network device may configure dedicated BWPs for the first class of terminal device and the second class of terminal device, for example, the network device configures a first BWP for the first class of terminal device and configures a second BWP for the second class of terminal device. The first BWP of the first type of terminal device may be exceeded 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 device. If the RO associated with the SSB selected by the first type terminal device is outside the maximum bandwidth supported by the first type terminal device, the RO cannot be used to initiate random access, so that the first type terminal device cannot access the network. It can also be understood that the RO selected by the first type terminal device is not the RO associated with the previously selected SSB, resulting in low access performance of the first type terminal device and even no access to the network.

For example, please refer to fig. 2, which is a schematic diagram of the association between 8 ROs and 8 SSBs. Fig. 2 exemplifies a one-to-one correspondence between 8 ROs and 8 SSBs. Fig. 2 exemplifies that the maximum bandwidth supported by the first type terminal device is 20MHz, the bandwidth of the initial downlink BWP configured for the first type terminal device by the network device is 20MHz, the length of the random access preamble is 839, and the subcarrier spacing (SCS) is 5kHz, that is, the bandwidth occupied by one RO is about 4.2 MHz. Assuming that 8 ROs are multiplexed in the frequency domain, the total bandwidth of the 8 ROs is 33.6MHz. As shown in fig. 2, RO #2-RO #5 are located within the maximum bandwidth supported by the first type of terminal device. The RO #0 to RO #1 and the RO #6 to RO #7 are located outside the maximum bandwidth supported by the terminal devices of the first type. The selected SSB of the first type terminal device before initiating the random access may be one SSB of SSB #0-SSB #1 and SSB #6-SSB #7, for example, the first type terminal device selects SSB #7. The RO associated with the SSB #7 is RO #7, and is outside the maximum bandwidth supported by the first type of terminal device, that is, the first type of terminal device cannot use RO #7 to transmit PRACH. If a terminal device sends a PRACH using one of RO #2-RO #5, which would cause a network device to send Msg2 and Msg4 using the SSB beam corresponding to the used RO in SSB #2-SSB #5, the performance of Msg2 and Msg4 reception by the terminal device would be very poor, resulting in a failure of random access by the terminal device.

In view of this, an embodiment of the present application provides a method for sending a random access preamble. The method can configure the association relationship of the SSB and the RO according to the type of the terminal device (or the maximum supported bandwidth). For example, the ROs in the association relationship of SSBs and ROs configured for a certain type of terminal device are all located within the maximum bandwidth supported by the terminal device of that type. Therefore, no matter which SSB is selected by the terminal equipment, the RO determined according to the selected SSB can be used, so that the failure times of random access are reduced, and the efficiency of accessing the network is improved.

In a possible implementation manner, the association relationship between the current SSB set and the RO set may be used for the second class of terminal devices, that is, N SSBs are mapped to 1 RO. And aiming at the first type of terminal equipment, proposing a new association relation between the SSB set and the RO set. That is, in the embodiment of the present application, an association relationship between an SSB set and an RO set configured for a first type of terminal device is newly added. For convenience of description, the association relationship between the SSB set and the RO set specific to the first type of terminal device may be referred to as a first correspondence relationship, and the association relationship between the SSB set and the RO set specific to the second type of terminal device may be referred to as a second correspondence relationship. The set of SSBs in the first correspondence is referred to as a first set of SSBs, and the set of ROs in the first correspondence is referred to as a first set of ROs. The set of SSBs in the second correspondence is referred to as a second set of SSBs, and the set of ROs in the second correspondence is referred to as a second set of ROs. The first set of SSBs and the second set of SSBs may be the same or different. Due to the difference in bandwidth capabilities of the first class of terminal device and the second class of terminal device, when the first class of terminal device and the second class of terminal device coexist, the network device may configure BWP separately for the first class of terminal device and the second class of terminal device, for example, the network device configures a first BWP for the first class of terminal device and configures a second BWP for the second class of terminal device. For example, the bandwidth of the first BWP is smaller than the bandwidth of the second BWP to adapt the bandwidth sizes of the first class of terminal devices and the second class of terminal devices. Of course, the bandwidth of the first BWP and the bandwidth of the second BWP may be the same. It should be understood that SSBs in the first set of SSBs are sent on either the first downstream BWP or the second downstream BWP, and SSBs in the second set of SSBs may be sent on the second downstream 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, and if one SSB set is sent in the first downlink BWP, the first SSB set and the second SSB set are different.

It is understood that the total bandwidth of RO multiplexed at most in the frequency domain may exceed the first upstream BWP when the total bandwidth does not exceed the second upstream BWP. If the RO associated with the SSB selected by the terminal device of the first type is just outside the maximum bandwidth supported by the terminal device of the first type, the terminal device of the first type may not access the network. Therefore, in this embodiment of the present application, the first mapping relationship configured by the network device may ensure that the ROs associated with the SSB selected by the first class of terminal device are all located in the first uplink BWP, so as to reduce the number of failure times of random access and improve the efficiency of accessing the network. It may also be understood that the first set of ROs in the first correspondence are all ROs that may be used by the terminal device of the first type (also referred to herein as valid ROs). The RO included in the first RO set may be considered to be part of the ROs in the second RO set, for example, the first RO set includes ROs in the second RO set that are located within the first BWP. Illustratively, the first set of ROs consists of ROs in the second set of ROs that are located within the first upstream BWP. For example, with continued reference to fig. 2, the second set of ROs comprises RO #0-RO #7, the ROs in the second set of ROs that are located within the first upstream BWP are RO #2-RO #5, and then the first set of ROs comprises RO #2-RO #5.

The following describes a procedure for sending a random access preamble by a terminal device with reference to the above embodiments and related drawings. In the following description, the communication method provided in the embodiment of the present application is applied to the network architecture shown in fig. 1 as an example. In addition, the method may be performed by two communication devices, e.g. a first communication device and a second communication device. 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 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 may also be other communication devices, such as a system on chip. And the implementation modes of the first communication device and the second communication device are not limited. For example, the first communication apparatus may be a terminal device, and the second communication apparatus is a network device; or the first communication means is a communication means capable of supporting the functions required by the terminal device to implement the method, the second communication means is a network device, etc.

In the following, the random access preamble sending method provided in the embodiment of the present application is executed as an example by a terminal device and a network device, that is, the first communication device is a terminal device, and the second communication device is a network device. If the present embodiment is applied to the network architecture shown in fig. 1, the terminal device described below may be a terminal device in the network architecture shown in fig. 1, and the network device described below may be a network device in the network architecture shown in fig. 1.

Please refer to fig. 3, which is a flowchart illustrating a method for sending a random access preamble and a method for receiving the random access preamble according to an embodiment of the present disclosure.

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 can configure the corresponding relation between the SSB set and the RO set for the first type terminal device through the first configuration information, and configure the corresponding relation between the SSB set and the RO set for the second type terminal device through the second configuration information. For example, the first configuration information may indicate a first correspondence of the first set of SSBs and the first set of ROs, and the second configuration information may indicate a second correspondence of the second set of SSBs and the second set of ROs. The first set of ROs all include ROs located in a first upstream BWP configured by the network device for the first type of terminal device, and the second set of ROs all include ROs located in a second upstream 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 device is smaller than that of the second type of terminal device, the bandwidth size of the first upstream BWP may be smaller than that of the second upstream BWP, which results in that some RO or ROs included in the second set of ROs may be located outside the first upstream BWP. In order to ensure that the ROs in the first set of ROs are all located at the first upstream BWP configured by the network device for the first type of terminal device, in this embodiment of the application, the first set of ROs may include the ROs in the second set of ROs that are located at the first upstream BWP. For example, the first set of ROs may consist of ROs in the second set of ROs that are located at the first upstream BWP. Therefore, under the condition that the first-class terminal device and the second-class terminal device coexist, the network device independently configures the corresponding relation between the SSB set and the RO set for the first-class terminal device and the second-class terminal device, so that the RO associated with the SSB selected by each class of terminal device is an effective RO, and the network access efficiency of each class of terminal device is improved.

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, and before sending the random access preamble to the network device, the terminal device may determine a first set of ROs based on the first correspondence, select one RO from the first set of ROs, and send the random access preamble to the network device on the selected RO. Because the first RO sets are all located in the first upstream BWP, that is, all located in the maximum bandwidth range supported by the first class of terminal devices, the number of ROs selected by the first class of terminal devices from the first RO set is more effective, which can reduce the number of times that the first class of terminal devices fail to randomly access the network, thereby improving the efficiency of accessing the network by the first class of terminal devices.

How the network device configures the first corresponding relationship through the first configuration information and how the network device configures the second corresponding relationship through the second configuration information are described below, respectively.

For the second type of terminal device, the second configuration information may continue to configure 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 map 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} may be considered a candidate set of N, also referred to herein as the second candidate set. Similarly, the first configuration information (or first correspondence) may be used to indicate that M SSBs map to 1 RO. Where N and M are not the same, the first RO set may all be located within the first BWP.

For example, please refer to fig. 4, which is a schematic diagram of the first corresponding relationship and the second corresponding relationship. In fig. 4, the second correspondence indicates that 1 SSB is mapped to 1 RO, i.e., N = 1. Take the example that the first correspondence indicates that 2 SSBs map to 1 RO, i.e. M = 2. Assume RO0-RO7 are located at the second BWP and RO2-RO5 are located at 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. Thus, no matter which SSB is selected by the first type of terminal device, the corresponding RO is located in the first BWP. The RO determined by the first type terminal device based on the first corresponding relation is always a valid RO, thereby improving the efficiency of the first type terminal device accessing the network.

M may be a different value than N in the second candidate set. In this case, the currently defined second candidate set may be reused without changing the currently defined protocol defining second candidate set, which is simpler. Alternatively, a different candidate set may be predefined from the second candidate set, e.g. the first candidate set, M may be a value in the first candidate set. Where the first set of candidates may be a proper subset of the second set of candidates, for example, the first set of candidates may be {1,2,4,8}. In this case, the first candidate set and the second candidate set may be predefined. The network device may select one value from the first candidate set as M and one 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, or may be considered as an information element in the configuration information of the second uplink BWP, where the information element is used to configure the second corresponding relationship. Similarly, the first configuration information may be carried in the configuration information of the first uplink BWP, or may be regarded as an information element in the configuration information of the first uplink BWP, where the information element is used to configure the first mapping relationship.

It is understood that if the first set of ROs includes a number of ROs other than the value in {1,2,4,8}, the first set of ROs includes 6 ROs, for example. In this case, the first configuration information indicates that M SSBs map to 1 RO, and it may happen that some ROs are not associated with any SSB, i.e. these ROs are not used, and are wasted. For example, please refer to fig. 5, which is a schematic diagram of the first corresponding relationship and the second corresponding relationship. Fig. 5 differs from fig. 4 in that the first RO set comprises 6 ROs, i.e., RO1-RO6. I.e., RO1-RO6, are located at the first BWP. Since the first RO set includes 6 ROs, which are mapped to 8 SSBs, and mapped to 1 RO according to 2 SSBs, and the remaining 2 ROs have no associable SSBs, then the 2 ROs are not used by the terminal device, which is more wasteful.

For this reason, the embodiment of the present application provides another configuration manner of the first correspondence relationship. 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 set of SSBs includes Q SSBs, and the preambles corresponding to all ROs included in the first set of ROs can be divided into Q preamble groups. And the Q SSBs correspond to the Q preamble groups one by one. The first RO set corresponds to Q preamble groups, that is, P ROs included in the first RO set have a correspondence with Q preamble groups. Therefore, the network device and the terminal device may obtain the correspondence between the P ROs and the Q SSBs, that is, the first correspondence, based on the correspondence between the P ROs and the Q preamble groups in the first RO set and the correspondence between the Q SSBs and the Q preamble groups.

Following the example of fig. 5, in fig. 5, all the preambles associated with the 6 RO associations can be divided into 8 preamble groups, i.e., G0-G7 in fig. 5. As shown in fig. 5, each RO of the 6 ROs is associated with 64 preambles, and the indices of the preambles associated with the 6 ROs are divided into 8 groups from 0 to 383. Then 6 ROs have correspondence with 8 preamble groups. The 8 preamble groups may correspond to 8 SSBs one-to-one, for example, G0 corresponds to SSB0, G1 corresponds to SSB1, and so on, G7 corresponds to SSB7. Thus, 6 ROs and 8 SSBs also have a corresponding relationship, that is, all ROs in the first set of ROs are associated with SSBs, so as to improve the utilization rate of the ROs as much as possible.

In a possible implementation, 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 determines the second mapping relationship according to the first cell. Similarly, the first configuration information may be carried in the configuration information of the first uplink BWP, or may be considered as an information element, such as the second information element, in the configuration information of the first uplink BWP. The second information element may comprise the number P of ROs comprised by the first set of ROs. For example, the second information element may indicate, by way of a bitmap, which ROs in the second set of ROs the first set of ROs comprises. The terminal device receives the configuration information of the first uplink BWP, and according to the second cell, may determine that the first RO set includes P ROs, and may divide all preambles associated with the P ROs into Q preamble groups according to the SSB number Q included in the second SSB set. The terminal device may determine the corresponding relationship between the P ROs and the Q SSBs, that is, determine the first corresponding relationship according to the corresponding relationship between the P ROs and the Q preamble groups and the one-to-one corresponding relationship between the Q preamble groups and the Q SSBs.

In addition, the embodiments of the present application do 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 upstream BWP. It can be understood that, the first class terminal device and the second class terminal device share a plurality of ROs, and then for the second class terminal device, when performing random access using the shared RO, the probability of preamble collision becomes high, resulting in a decrease in success rate of random access. For example, both the first type terminal device and the second type terminal device select the same RO at the same time, and obviously, when random access is performed by using the RO, preambles selected by the two types of terminal devices may collide. In particular, the second type of terminal device always uses some ROs, which are also used by the first type of terminal device during the same time period, which always affects the ROs, i.e., the second type of terminal device in the direction of the fixed SSB. In order to reduce the influence of the first class of terminal devices on the random access performance of the second class of terminal devices as much as possible and ensure the random access performance of the first class of terminal devices, in the embodiment of the present application, the first RO sets used by the first class of terminal devices in different time units are allowed to be different. For example, in a first time unit, the first set of ROs includes RO #0-RO #3; during a second time unit, the first set of ROs comprises RO #2-RO #5; during the third time unit, the first set of ROs includes RO #4-RO #7. Because the ROs in the first RO set vary in different time units, it is possible to avoid that the first class terminal device always affects the second class terminal device in the SSB beam direction associated with some fixed ROs, so as to balance the random access performance of the first class terminal device and the second class terminal device.

The specific implementation forms of the first RO set that are different in different time units may include the following two.

In implementation form one, the network device may make the first set of ROs different in different time units by adjusting the positions of the first set of ROs. For example, in a first time unit, the first set of ROs occupy first frequency-domain resources, and in a second time unit, the first set of ROs occupy second frequency-domain resources, where the first frequency-domain resources and the second frequency-domain resources are different. Since the first frequency domain resource and the second frequency domain resource are different, the RO corresponding to the first frequency domain resource is different from the RO corresponding to the second frequency domain resource, and thus the first set of ROs is different in the first time unit and the second time unit.

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

In implementation form two, the first RO set may be made different in different time units by changing the frequency domain resources (which may also be understood as frequency domain locations) of the first upstream BWP. For example, in a first time unit, the first uplink BWP is a first frequency domain resource, and in a second time unit, the first uplink BWP is a second frequency domain resource, where the first frequency domain resource and the second frequency domain resource are different. Since the first frequency domain resource and the second frequency domain resource are different, the RO corresponding to the first frequency domain resource is different from the RO corresponding to the second frequency domain resource, and thus the first set of ROs is different in the first time unit and the second time unit. Wherein, the frequency domain resource of the first uplink BWP in each time unit may be configured or preconfigured by the network device through signaling. In yet another embodiment, the frequency resources of the first upstream BWP are determined based on the frequency resources 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. The network device may 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 do not have an intersection. The terminal device can select and send the random access preamble in the preamble set corresponding to the type of the terminal device. The network device receives the preamble, determines which preamble set the preamble belongs to according to the index of the preamble, and further determines which type of terminal device the preamble comes from. For a certain class of terminal devices, for N SSBs associated with a certain RO, a start index of a preamble of a contention-based random access (CBRA) associated with an nth (0 < = N-1) SSB of the N SSBs may be determined in the following two ways.

In the first mode, the preamble index of the first type of terminal device starts from the preamble ending position of the second type of terminal device, and the preamble index of the first type of terminal device satisfies the following conditions:

in the second mode, the network device configures the start index of the preamble in the RO for the first class of terminal device through signaling, and the preamble index of the first class of terminal device satisfies the following conditions:

wherein the Preamble _end The last preamble index, preamble, used for terminals of the second class _start The first preamble index used for the second class of terminal devices,

number of all preambles used for a terminal of the second type, based on the comparison result>

For all available preamble numbers on the RO, n is the index of the associated SSB on the RO, 0<＝n<And = N-1, 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 illustrates an example in which a first type terminal device and a second type terminal device multiplex RO2, and the number of random access preambles that can be used on RO2 is 64. The 64 random access preambles may be divided into 3 groups, wherein the first group is for use by terminal devices of the second type and is associated to SSB2; the second group is used by the first type of terminal equipment and is associated to SSB0; the third group is for use by terminal devices of the first type and is associated to SSB1.

It is understood that the network device may configure a first downlink BWP for the first type of terminal device and a second downlink BWP for the second type of terminal device. In a possible implementation, the network device may send SSBs to the first class of terminal devices on the first downlink BWP and SSBs to the second class of terminal devices on the second downlink BWP. In this case, the first set of SSBs may be SSBs sent by the network device on the first downlink BWP, and correspondingly, the second set of SSBs may be SSBs sent by the network device on the second BWP. Alternatively, the network device may send SSBs to the first class of terminal device and the second class of terminal device on the second downlink BWP, and the network device does not send SSBs on the first downlink BWP. In this case, the first set of SSBs and the second set of SSBs are the same and are SSBs sent on the second downlink BWP. The network device may send the SSB to the first type of terminal device at the first downlink BWP, or send the SSB to the first type of terminal device at the second downlink BWP.

If the network device does not send SSB on the first downlink BWP and the first type of terminal device does not support SSB inclusion in one BWP, the first type of terminal device cannot operate on the first downlink BWP but only on the second downlink BWP. It can also be considered that the network device cannot configure the terminal device with a BWP that does not contain SSB, e.g., the first downlink BWP.

For this purpose, the first-class terminal device notifies the network device whether the first-class terminal device supports BWP without SSB, so as to enable the network device and the terminal device to keep consistent understanding of the BWP that can operate, and avoid the network device configuring BWP without SSB to the terminal device when the terminal device does not support BWP without SSB. It is to be understood that the absence of SSBs within BWP is to be understood as the absence of SSB transmission on the BWP frequency domain resources. For example, the first type of terminal device may send 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 BWP without SSB. The BWP may be an initial downlink BWP configured by the network device for the first class of terminal device, 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 device supports no SSB in the initial downlink BWP, and/or the first capability information may be used to indicate whether the first type of terminal device supports no SSB in the non-initial downlink BWP. The first downlink BWP referred to in the following with respect to the first capability information may be an initial downlink BWP or a non-initial downlink BWP.

The embodiment of the present application does not limit the specific implementation manner of reporting the first capability information to the network device by the first class terminal device, and may include, for example, the following four implementation manners.

In a first implementation manner, the first capability information may be reported through a preamble used by the random access message 1. It can also be understood that the first type terminal device sends the first capability information to the network device, that is, the first type terminal device sends the random access message 1 to the network device. The random access message 1 uses different preambles, and the random access message 1 indicates different information. For example, the random access message 1 uses a first preamble, indicating that the first class of terminal devices supports not including SSBs within the first downlink BWP; accordingly, the random access message 1 uses the second preamble indicating that the first class of terminal devices does not support the absence of SSBs within the first downlink BWP.

In a second implementation manner, 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 first terminal device of the first type sends the first capability information to the network device, which is essentially that the first terminal device of the first type sends the random access message 1 to the network device. The RO resources used by the random access message 1 are different, and the information indicated by the random access message 1 is also different. For example, random access message 1 uses a first RO resource indicating that the first type of terminal device supports no SSB inclusion in the first BWP; accordingly, the random access message 1 uses the second RO resource to indicate that the first type of terminal device does not support the SSB not included in the first downlink BWP.

In a third implementation manner, the first capability information may be reported through the random access message 3. It can also be understood that the first terminal device of the first type sends the first capability information to the network device, which is essentially that the first terminal device of the first type sends the random access message3 to the network device. The first type of terminal device may be indicated to support the exclusion of SSBs within the first downlink BWP if the first type of terminal device sends a random access message3 to the network device. If the first type of terminal device does not send random access message3 to the network device, it may indicate that the first type of terminal device does not support the absence of SSBs in the first downlink BWP.

In a fourth implementation manner, the first capability information is reported through the BWP where the PUCCH carrying the HARQ-ACK feedback information for the random access message4 is located, or may be understood as being reported through the PUCCH resource location carrying the HARQ-ACK feedback information for the random access message 4. It can also be understood that the first type terminal device sends the first capability information to the network device, and in essence, the first type terminal device sends HARQ-ACK feedback information for the random access message4 to the network device. Wherein, the BWP where the PUCCH carrying the HARQ-ACK feedback information for the random access message4 is located may be used to indicate whether the first type of terminal device supports that no SSB is included in the first downlink BWP. For example, the feedback information is carried in a PUCCH of the first uplink BWP, and indicates that the first class of terminal devices support that the first downlink BWP does not include SSB; correspondingly, the feedback information is carried in the PUCCH of the second uplink BWP, and indicates that the first type of terminal device does not support the first downlink BWP in which the first type of terminal device does not include SSB.

The network device receives first capability information from the first type terminal device, and determines whether the terminal device supports configuring a BWP without SSB according to the first capability information. For example, the first capability information indicates that the first type of terminal device does not support configuring a BWP without SSB, then the network device must send SSB on the first downlink BWP configured for the first type of terminal device, or if the first downlink BWP configured by the network device does not send SSB, then the first type of terminal device cannot operate on the first downlink BWP. The first capability information indicates that the first type of terminal device supports that the first downlink BWP does not include the SSB, and the network device may selectively send the SSB on the first downlink BWP, that is, may send the SSB or not send the SSB, and the first type of terminal device may operate in the first downlink BWP.

In this embodiment, the network device may independently configure the correspondence 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 RO in the corresponding relation between the SSB set and the RO set configured for a certain type of terminal device is located within the maximum bandwidth supported by the terminal device. Therefore, no matter which SSB is selected by the terminal equipment, the RO determined according to the selected SSB can be used, so that the failure times of random access are reduced, and the efficiency of accessing the network is improved.

As described above, in the case where the first type terminal device and the second type terminal device coexist in the network, how each type of terminal device transmits the random access preamble to the network device is introduced. How the first type terminal device sends HARQ-ACK feedback information for the random access message4 under the condition that the first type terminal device and the second type terminal device coexist is described below. First, the related technical characteristics of the second type of terminal equipment sending HARQ-ACK feedback information for the random access message4 are introduced.

The HARQ-ACK feedback information for random access message4 is transmitted over PUCCH resources. Before the terminal device enters the connected state, the network device does not configure a dedicated PUCCH resource for the terminal device, but configures a common PUCCH resource set for the terminal device. The terminal device may transmit HARQ-ACK feedback information for random access message4 using a PUCCH resource in the common PUCCH resource set. The common PUCCH resource set contains 16 PUCCH resources, each PUCCH resource is associated with some parameters of the corresponding PUCCH, such as PUCCH format (format), starting symbol, duration, physical Resource Block (PRB) offset value, and cyclic shift index (cyclic shift index) used for a certain PUCCH transmission. The configuration information configuring the common PUCCH resource set may be carried in SIB1. At present, for PUCCH transmission in the PUCCH resource set, a default protocol is to perform frequency hopping transmission in a slot to combat frequency selective fading of a wireless channel, obtain frequency diversity gain, and improve transmission performance of the PUCCH. The protocol specifies the PUCCH resource to be transmitted and the PRB location where the PUCCH resource is located. And the terminal equipment determines PUCCH resources according to the protocol specification and transmits the PUCCH on the PRB corresponding to the determined PUCCH resources.

For example, please refer to fig. 7, which is a schematic diagram of PUCCH resources. Fig. 7 includes 16 PUCCH resources in a PUCCH resource set, and numbers (or indexes) of the 16 PUCCH resources are 0 to 15. Fig. 7 illustrates PUCCH frequency hopping transmission in a slot. The current regulations are:

1) The PUCCH resource position satisfies:

0≤r _PUCCH less than or equal to 15, wherein N is _CEE Total number of Control Channel Elements (CCEs) included in CORESET for receiving PDCCH, n _CEE，0 For the first CCE index, Δ, of the received PDCCH _PRI Is a value indicated by the PUCCH resource indication field in DCI.

2) The PRB position of the transmission PUCCH meets the following conditions:

if it is used

The PRB position of the PUCCH in the first hop satisfies the following conditions: />

The PRB position of the PUCCH in the second hop satisfies the following conditions: />

If->

The PRB position of the PUCCH in the second hop satisfies the following conditions:

wherein it is present>

Based on the size (number of PRBs) of the first upstream BWP>

And N _CS And taking values of the current common PUCCH resource set configuration.

Because the maximum bandwidth supported by the second type of terminal device is relatively large, for example, 100MHz, relatively speaking, the uplink BWP configured by the network device for the second type of terminal device may be 100MHz at most, that is, the PUCCH may perform frequency hopping transmission within 100 MHz. For the first type of terminal device, because the maximum bandwidth supported by the first type of terminal device is relatively small, for example, 20MHz, and the uplink BWP configured for the first type of terminal device by the network device is also relatively small, for example, 20MHz, for the first type of terminal device, the PUCCH of the first type of terminal device can only perform frequency hopping transmission within the range of 20MHz, which may cause PUSCH resource fragmentation and affect the uplink transmission rate of the second type of terminal device. Please refer to fig. 8, which is a schematic diagram of PUCCH resource frequency hopping transmission under the coexistence of the first type terminal device and the second type terminal device according to the embodiment of the present application. As can be seen from fig. 8, when the first class of terminal devices and the second class of terminal devices coexist, the second class of terminal devices frequency-hop to transmit PUCCH within 100MHz, and the first class of terminal devices frequency-hop to transmit PUCCH within 20MHz within 100MHz, which may cause PUSCH resource fragmentation.

In order to avoid fragmentation of resources as much as possible and improve uplink transmission rate, the embodiment of the present application provides a new scheme for PUCCH resources for HARQ-ACK feedback information of random access message 4. For example, PUCCH does not hop within a slot, or PUCCH repeats transmission between slots (also known as inter-slot hopping transmission). These two schemes are described separately below.

In the first scheme, the PUCCH does not hop within a slot.

It will be appreciated that the current protocol defaults to frequency hopping transmissions within a time slot. Therefore, in the embodiment of the present application, the network device may indicate, through signaling, whether to perform frequency hopping transmission in a slot when the first class of terminal device sends the PUCCH. For example, the terminal devices of the first class transmit HARQ-ACK feedback information for the random access message4 or the random access message B, and the network device may instruct the terminal devices of the first class not to perform frequency hopping transmission in the time slot when transmitting the PUCCH through signaling. The signaling may be SIB1 or DCI. For example, if the DCI is a DCI scheduling random access message4 or random access message B, the Downlink assignment index field in the DCI may indicate whether the terminal device hops within a slot for transmission when transmitting the PUCCH.

Similarly, in the case where the PUCCH for the HARQ-ACK feedback information for the random access message4 is transmitted by the terminal device of the first type without frequency hopping within the slot, the PUCCH resource and the PRB position for transmitting the PUCCH may be specified.

As an example, it may be specified that PUCCH resources are only on one side of the carrier bandwidth resource, i.e. the PUCCH resources are calculated starting from the lowest frequency or highest frequency position of the carrier bandwidth. The PUCCH resource may multiplex a common PUCCH resource set configured by the current network device for the second class of terminal devices, or may be a common PUCCH resource set configured by the network device for the first class of terminal devices. For PUCCH resource r _PUCCH And the PRB position for transmitting the PUCCH resource meets the following conditions:

A frequency domain offset value for a set of common PUCCH resources.

For example, please refer to fig. 9, which is a diagram illustrating transmission of PUCCH. Fig. 9 illustrates an example in which PUCCH is not subjected to frequency hopping transmission in slot X. Fig. 9 includes 16 PUCCH resources numbered from 0 to 15 in a PUCCH resource set. In fig. 7, it is specified that PUCCH resources are located on one side of the carrier bandwidth, and as shown in fig. 9, PUCCH resources are counted from the lowest frequency of the carrier bandwidth by number. 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 subjected to frequency hopping transmission in the slot, the PUSCH resource is not fragmented on the carrier bandwidth, so that the uplink transmission rate of the second type of terminal device may be increased.

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

In this example, r is for the PUCCH resource _PUCCH The PRB locations for transmitting the PUCCH resources may be specified to satisfy:

if it is not

Using PUCCH resources in the first uplink BWP, the PRB position of the transmission PUCCH satisfies the following conditions:

if->

Frequency domain offset value, <' > for a set of common PUCCH resources>

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

It will be appreciated that in this example, the terminal device may determine the BWP over which the PUCCH resource is transmitted based on the determined PUCCH resource index.

For example, please refer to fig. 10, which is a diagram illustrating transmission of PUCCH. Fig. 8 illustrates an example in which PUCCH is not frequency-hopped for transmission in slot X. Fig. 10 includes 16 PUCCH resources numbered from 0-15 in a PUCCH resource set. In fig. 8, PUCCH resources are specified to be located on both sides of the carrier bandwidth. As shown in fig. 10, PUCCH resources 0 to 7 are located at the first uplink BWP, the first uplink BWP being calculated from the lowest frequency of the carrier bandwidth, PUCCH resources 8 to 15 are located at the second uplink BWP, and the second uplink BWP being calculated from the highest frequency of the carrier bandwidth. In this example, since the PUCCH resources are located in two uplink BWPs on both sides of the carrier bandwidth, and the PUCCH is not subjected to frequency hopping transmission in the slot, the PUSCH resources are not fragmented in the carrier bandwidth, so that the uplink transmission rate can be increased.

And in the second scheme, the PUCCH is repeated among the time slots and performs frequency hopping transmission among the time slots so as to improve the transmission performance of the PUCCH.

Similarly, the network device may signal whether to frequency hop and/or repeat transmission between slots when the first type of terminal device sends PUCCH. For example, the terminal devices of the first class transmit HARQ-ACK feedback information for the random access message4 or the random access message B, and the network device may instruct the terminal devices of the first class to perform inter-slot frequency hopping and/or inter-slot frequency hopping transmission when transmitting the PUCCH through signaling. The signaling may be SIB1 or DCI. For example, if the DCI is a DCI scheduling random access message4 or random access message B, a Downlink assignment index field in the DCI may indicate that the terminal device repeats and/or hops transmission between slots when transmitting PUCCH.

In order to avoid fragmentation of resources, in the embodiment of the present application, PUCCH resources may be located on both sides of the carrier bandwidth, that is, BWPs configured with PUCCH resources are located on both sides of the carrier bandwidth. Similarly, there are a first uplink BWP and a second uplink BWP configured with PUCCH resources, where the first uplink BWP and the second uplink BWP are located on two sides of the carrier bandwidth respectively. In this example, the PUCCH resource may multiplex a common PUCCH resource set currently configured by the network device for the second class of terminal devices, or may be a common PUCCH resource set specifically configured by the network device for the first class of terminal devices. The difference from scheme one is that the PRB locations for transmitting PUCCH resources are different.

As an example, for PUCCH resource r _PUCCH And the PRB position for transmitting the PUCCH resource meets the following conditions:

if it is not

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

If it is not

A frequency domain offset value for a set of common PUCCH resources,

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

For example, please refer to fig. 11, which is a diagram illustrating transmission of PUCCH. Fig. 11 illustrates PUCCH frequency hopping transmission between slot X and slot Y. The PUCCH resource set in fig. 11 includes 16 PUCCH resources numbered from 0-15. In fig. 9, PUCCH resources are specified to be located on both sides of the carrier bandwidth. As shown in fig. 9, in 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 slot Y, PUCCH resources 0-7 are located in the second uplink BWP, and PUCCH resources 8-15 are located in the first uplink BWP. The first upstream BWP is computed starting from the lowest frequency of the carrier bandwidth and the second upstream BWP is computed starting from the highest frequency of the carrier bandwidth. In this example, PUCCH resources are located in two uplink BWPs on both sides of the carrier bandwidth, and adjacent frequency hopping transmission of the PUCCH is located on both sides of the carrier bandwidth during slot frequency hopping transmission, so that the phenomenon of PUSCH resource fragmentation does not occur on the carrier bandwidth, and the uplink transmission rate of the second type of terminal device can be increased, and meanwhile, the PUCCH performs slot repetition and frequency hopping transmission, thereby improving the PUCCH transmission performance of the first type of terminal device.

As another example, for PUCCH resources r _PUCCH And the PRB position for transmitting the PUCCH resource meets the following conditions:

if it is not

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

If it is not

Frequency domain offset value, <' > for a set of common PUCCH resources>

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

For example, please refer to fig. 12, which is a diagram illustrating transmission of PUCCH. Fig. 10 illustrates PUCCH frequency hopping transmission between slot X and slot Y. The PUCCH resource set in fig. 12 includes 16 PUCCH resources numbered from 0-15. In fig. 12, PUCCH resources are specified to be located on both sides of the carrier bandwidth. The difference from fig. 11 is that in fig. 12, PUCCH resources 0 to 7 are calculated from the lowest frequency of the carrier bandwidth starting from number 0 in the first hop in slot X, but the second hop PUCCH resource in slot Y is calculated from the highest frequency of the carrier bandwidth starting from number 7. PUCCH resources 8-15 are calculated starting from the highest frequency of the carrier bandwidth starting with number 15 in slot X for the first hop, but starting from the lowest frequency of the carrier bandwidth starting with number 8 for the second hop PUCCH resource in slot Y.

It can be understood that, in order to avoid PUSCH resource fragmentation, when frequency hopping is performed between 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 may exceed the maximum bandwidth supported by the first class terminal device, so that the first class terminal device needs to perform frequency tuning between the two frequency hopping transmissions, and cannot perform data transmission during the frequency tuning, so that PUCCH data falling during the frequency tuning may be dropped for transmission. Alternatively, the network device schedules a time interval between two PUCCH frequency hopping transmissions to be greater than the frequency tuning time.

In the embodiments provided in the present application, the method provided in the embodiments of the present application is introduced from the perspective of interaction between the terminal device and the network device. In order to implement the functions in the method provided by the embodiments of the present application, the terminal device and the network device may include a hardware structure and/or a software module, and the functions are implemented in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution.

The embodiment of the application provides a communication device. The following describes a communication device for implementing the above method in the embodiment of the present application with reference to the drawings.

As shown in fig. 13, which is a possible exemplary block diagram of a communication apparatus according to the present application, the communication apparatus 1300 may correspondingly implement the functions or steps implemented by the terminal device or the network device in the foregoing method embodiments. The communication device may include a transceiver module 1301 and a processing module 1302. Optionally, a storage module may be included, which may be used to store instructions (code or programs) 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 (codes or programs) and/or data in the storage module to implement the corresponding method. The modules can be arranged independently, or can be partially or completely integrated.

It should be understood that the processing module 1302 may be a processor or controller, such as a general purpose Central Processing Unit (CPU), a general purpose processor, a Digital Signal Processing (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, transistor logic device, hardware component or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The transceiver module 1301 is an interface circuit of the apparatus for receiving signals from other apparatuses. For example, when the device is implemented as a chip, the transceiver module 1301 is an interface circuit of the chip for receiving signals from other chips or devices, or an interface circuit of the chip for transmitting signals to other chips or devices.

The communication apparatus 1300 may be a network device, a terminal device, and a location management device in the above embodiments, and may also be a chip 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 a processor, and the transceiving module 1301 may be a transceiver. Optionally, the transceiver may comprise radio frequency circuitry and the storage unit may be, for example, a memory. For example, when the communication apparatus 1300 is a chip for a network device, a terminal device or a location management device, the processing module 1302 may be a processor, and the transceiver module 1301 may be an input/output interface, a pin or a circuit, for example. The processing module 1302 may execute computer executable instructions stored in a storage unit, optionally, the storage unit is a storage unit in the chip, such as a register, a cache, and the like, and the storage unit may also be a storage unit located outside the chip in the network device, the terminal device, or the location management device, such as a read-only memory (ROM) or another type of static storage device, a Random Access Memory (RAM), and the like, which may store static information and instructions.

In some possible embodiments, the communications apparatus 1300 can correspondingly implement the behaviors and functions 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 (e.g., a chip or a circuit) applied to the terminal device. The transceiving module 1301 can be used to support communication between a terminal device and other network entities, for example, to support communication between a terminal device and a network device shown in fig. 3. The processing module 1302 is configured to control and manage the actions of the terminal device, for example, the processing module 1302 is configured to support the terminal device to perform all operations of the terminal device in fig. 3 except for transceiving operations.

For example, the transceiving module 1301 may be configured to perform all receiving or transmitting operations performed by the terminal device in the embodiment illustrated in fig. 3, e.g., S301 in the embodiment illustrated in fig. 3, and/or other processes for supporting the techniques described herein. Wherein the processing module 1302 is configured to perform all operations performed by the terminal device in the embodiment shown in fig. 3 except for transceiving operations, such as S302 in the embodiment shown in fig. 3, and/or other processes for supporting the techniques described herein.

In some embodiments, the transceiving module 1301 is configured to receive first configuration information from the network device, where the first configuration information is used to indicate a first correspondence relationship between a first SSB set and a first RO set, where the first RO set includes ROs in a second RO set located in a first BWP, the first BWP corresponds to the first type of terminal device, and the second RO set is located in a second BWP, and the second BWP corresponds to the second type of terminal device. The processing module 1302 is configured to determine a first set of ROs based on 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 alternative implementation, the first RO set consists of ROs in the second RO set that are located within the first BWP.

As an alternative implementation manner, the second corresponding relationship between the second set of ROs and the second set of SSBs is configured by the second configuration information.

As an optional implementation manner, the first corresponding relationship indicates that M SSBs are mapped to 1 RO, the second corresponding relationship indicates that N SSBs are mapped to 1 RO, and N and M are different.

As an optional implementation manner, the first configuration information includes a number P of ROs included in the first RO set, and the first corresponding relationship 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 preamble associated with the P ROs includes Q random access preamble sets, and the Q SSBs correspond to the Q random access preamble sets one by one.

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

As an optional implementation manner, the transceiving module 1301 is further configured to send first capability information to the network device, where the first capability information is used to indicate whether the communication apparatus 1300 supports BWP without SSB included therein.

As an optional implementation manner, the first capability information is reported through a preamble used by the random access message 1 or through an 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 PUCCH resources carrying HARQ-ACK feedback information aiming at the random access message 4.

In 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 PUCCH resources are not used for intra-slot frequency hopping transmission or inter-slot frequency hopping transmission, and the PUCCH resources are used for the terminal device to transmit HARQ-ACK feedback information for the random access message4 (or the random access message B). The random access message4 or the random access message B may be used to carry a random access collision resolution identity, an RRC connection setup message, and the like. Thereafter, the transceiving module 1301 transmits HARQ-ACK feedback information for the random access message4 (or the random access message B) on the PUCCH resource according to the second indication information.

As an optional implementation manner, the second indication information indicates that the PUCCH resource is not subjected to intra-slot frequency hopping transmission, and the BWP configured with the PUCCH resource is located on one side of the carrier bandwidth configured by the communication apparatus 1300 for the PUCCH resource r _PUCCH And the PRB position for transmitting the PUCCH resource meets the following conditions:

Is the frequency domain starting position of the common PUCCH resource set.

As an optional implementation manner, the second indication information indicates that the PUCCH resource does not perform intra-slot frequency hopping transmission, and the first uplink BWP and the second uplink BWP configured with the PUCCH resource are respectively located on two sides of the carrier bandwidth configured by the communication apparatus 1300, and for the PUCCH resource r _PUCCH And the PRB position for transmitting the PUCCH resource meets the following conditions:

if it is used

if->

Frequency domain offset value, <' > for a set of common PUCCH resources>

Is the size (number of PRBs) of the second uplink BWP. It will be appreciated that in such an implementation, 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 resource is repeated between slots and is transmitted in frequency hopping manner between slots, and the first uplink BWP and the second uplink BWP configured with the PUCCH resource are located on two sides of the carrier bandwidth configured by the communication apparatus 1300, and for the PUCCH resource r _PUCCH And the PRB position for transmitting the PUCCH resource meets the following conditions:

if it is not

Frequency domain offset value, <' > for a set of common PUCCH resources>

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

If it is used

A frequency domain offset value for a set of common PUCCH resources,

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

As an optional implementation manner, the second indication information indicates that the PUCCH resource is repeated between slots and frequency hopping transmission between slots, and the first uplink BWP and the second uplink BWP configured with the PUCCH resource are configuredThe uplink BWP is located on both sides of the carrier bandwidth configured by communication apparatus 1300 and corresponds to PUCCH resource r _PUCCH And the PRB position for transmitting the PUCCH resource meets the following conditions:

if it is not

A frequency domain offset value for a set of common PUCCH resources.

If it is not

A frequency domain offset value for a set of common PUCCH resources.

Also for example, the transceiver module 1301 may be used to perform all receiving or transmitting operations performed by a network device in the embodiment shown in fig. 3, such as S301 in the embodiment shown in fig. 3, and/or other processes for supporting the techniques described herein. Among other things, the processing module 1302 is configured to perform all operations performed by a network device in the embodiment shown in fig. 3, except transceiving operations, and/or other processes to support the techniques described herein.

In some embodiments, the processing module 1302 is configured to determine first configuration information and second configuration information, wherein the first configuration information is used for indicating a first corresponding relationship between the first SSB set and the first RO set, and the second configuration information is used for indicating a second corresponding relationship between the second SSB set and the second RO set. The first RO set comprises the RO in the first BWP in the second RO set, the first BWP corresponds to the first type terminal device, the second RO set is in the second BWP, the second BWP corresponds to the second type terminal device. The transceiving 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 a first class of terminal devices.

As an optional implementation manner, the first configuration information includes a number P of ROs included in the first RO set, and the first corresponding relationship 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 preamble associated with the P ROs includes 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 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 BWP without SSB included therein.

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 intra-slot frequency hopping transmission or inter-slot frequency hopping transmission, and the PUCCH resources are used for sending HARQ-ACK feedback information for the random access message4 (or the random access message B) by the terminal device. The random access message4 or the random access message B may be used to carry a random access collision resolution identity, an RRC connection setup message, and the like. The transceiving module 1301 is further configured to receive HARQ-ACK feedback information for the random access message4 (or the random access message B) from the terminal device.

As an optional implementation manner, the second indication information indicates that the PUCCH resource is not to perform intra-slot frequency hopping transmission, and the BWP configured with the PUCCH resource is located on one side of the carrier bandwidth configured by communication apparatus 1300, and for PUCCH resource r _PUCCH And the PRB position for transmitting the PUCCH resource meets the following conditions:

Is the frequency domain starting position of the common PUCCH resource set.

As an optional implementation manner, the second indication information indicates that the PUCCH resource is not availablePerforming intra-slot frequency hopping transmission, wherein the first uplink BWP and the second uplink BWP configured with the PUCCH resource are respectively positioned at two sides of the carrier bandwidth configured by the communication device 1300, and the PUCCH resource r is used for the PUCCH resource _PUCCH And the PRB position for transmitting the PUCCH resource meets the following conditions:

if it is not

if->

Frequency domain offset value, <' > for a set of common PUCCH resources>

As an optional implementation manner, the second indication information indicates that the PUCCH resource is repeated between slots and is transmitted in frequency hopping between slots, and the first uplink BWP and the second uplink BWP configured with the PUCCH resource are located on both sides of the carrier bandwidth configured by the communication apparatus 1300, and for the PUCCH resource r _PUCCH And the PRB position for transmitting the PUCCH resource meets the following conditions:

if it is not

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

If it is not

A frequency domain offset value for a set of common PUCCH resources,

is a firstThe size of the two uplink BWPs (number of PRBs).

if it is used

A frequency domain offset value for a set of common PUCCH resources.

If it is not

Wherein r is _PUCCH For PUCCH resource index, N _CS Number of cyclic shifts for common PUCCH resource set，/>

A frequency domain offset value for a set of common PUCCH resources.

It is to be understood that the processing module 1302 in the embodiments 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 further provides a communication system, and 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. Illustratively, the communication system includes a network device and a terminal device for implementing the related functions of the above-described fig. 3 embodiment. The network devices are respectively configured to implement the functions of the relevant network device part in the embodiment of the present application, for example, to implement the functions of the relevant network device part in the embodiment shown in fig. 3. The terminal device is configured to implement a function of a relevant terminal device part in an embodiment of the present application, for example, to implement a function of a relevant terminal device in the embodiment shown in fig. 3. For details, please refer to the related description in the above method embodiments, which is not repeated herein.

As shown in fig. 14, a communication apparatus 1400 provided in the embodiment of the present application is shown, where the communication apparatus 1400 may be a network device and may implement a function of the network device in the method provided in the embodiment of the present application, or the communication apparatus 1400 may be a terminal device and may implement a function of the terminal device in the method provided in the embodiment of the present application; alternatively, the communication apparatus 1400 may also be an apparatus capable of supporting a network device or a terminal device to implement the corresponding functions in the method provided in the embodiment of the present application. The communication device 1400 may be a system on a chip. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices.

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

The communication apparatus 1400 includes at least one processor 1420, where the processor 1420 may be a CPU, a microprocessor, an ASIC, or one or more integrated circuits for controlling the execution of the programs in the present application, and is used to implement or support the communication apparatus 1400 to implement the functions of the network device or the terminal device in the methods provided by the embodiments of the present application. For details, reference is made to the detailed description in the method example, which is not repeated herein.

The communications device 1400 may also include at least one memory 1430 for storing program instructions and/or data. A 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, and may be an electrical, mechanical or other form for information interaction between the devices, units or modules. The processor 1420 may operate in conjunction with the memory 1430. Processor 1420 may execute program instructions and/or data stored in memory 1430 to cause communication device 1400 to implement a corresponding method. At least one of the at least one memory may be included in the processor 1420.

Communications device 1400 may also include a communications interface 1410 using any transceiver or the like for communicating with other devices or communications networks, such as a RAN, wireless Local Area Networks (WLANs), wired access networks, and the like. The communication interface 1410 is used to communicate with other devices over a transmission medium so that the apparatus used in the communication apparatus 1400 can communicate with other devices. Exemplarily, when the communication apparatus 1400 is a network device, the other device is a terminal device; or, when the communication device is a terminal device, the other device is a network device. Processor 1420 may send and receive data using communication interface 1410. Communication interface 1410 may specifically be a transceiver.

The 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 by a bus 1440, the bus is shown by a thick line in fig. 14, and the connection manner between other components is only for illustrative purposes and is not limited thereto. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 14, but that does not indicate only one bus or one type of bus.

In the embodiments of the present 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, a discrete hardware component, and may implement or execute the methods, steps, and logic blocks 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 a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

The memory 1430 may be, but is not limited to, a ROM or other type of static storage device that can store static information and instructions, a RAM or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disk read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be separate and coupled to the processor via communication link 1440. The memory may also be integral to the processor.

The memory 1430 is used for storing computer-executable instructions for performing aspects of the present application and is controlled in execution by the processor 1420. The processor 1420 is configured to execute the computer-executable instructions stored in the memory 1430, so as to implement the method for transmitting and/or receiving a random access preamble according to the foregoing embodiments of the present application.

Optionally, the computer-executable instructions in this embodiment may also be referred to as application program codes, which is not specifically limited in this embodiment.

The communication device in the above embodiments may be a terminal device, a circuit, a chip applied to a terminal device, or other combined devices and components having the functions of the terminal device. When the communication device is a terminal device, the transceiver module may be a transceiver, and may include an antenna, a radio frequency circuit, and the like, and the processing module may be a processor, for example: a CPU. When the communication device is a component having the functions of the 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 may be an FPGA, a dedicated ASIC, a system on chip (SoC), a CPU, a Network Processor (NP), a DSP, a Micro Controller Unit (MCU), a Programmable Logic Device (PLD), or other integrated chip.

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

For example, the communication device in the above embodiments may be a chip, which includes a logic circuit and an input/output interface, and may further include a memory. The input/output interface can be used for receiving code instructions (the code instructions are stored in the memory, can be directly read from the memory, or can also be read from the memory through other devices) and transmitting the code instructions to the logic circuit; the logic circuit may be configured to execute the code instructions to perform the method in the above method embodiment. Alternatively, the input/output interface may be a signal transmission interface circuit between the logic circuit and the transceiver.

Fig. 15 shows a simplified schematic of a communication device. For ease of understanding and illustration, fig. 15 illustrates a base station as an example of the communication device. The base station can be applied to the system shown in fig. 1, and can be the network device in fig. 1, and performs the functions of the network device in the above method embodiments.

The communications apparatus 1500 can include a transceiver 1510, a memory 1521, and a processor 1522. The transceiver 1510 may be used for communication by a communication device, such as for transmitting or receiving the above-mentioned indication information. The memory 1521 is coupled to the processor 1522 and is used for storing programs and data necessary for the communication device 1500 to realize the functions. The processor 1522 is configured to enable the communication device 1500 to perform corresponding functions in the above-described methods, which functions can be implemented by calling a program stored in the memory 1521.

In particular, the transceiver 1510 can be a wireless transceiver and can be configured to support the communication apparatus 1500 for receiving and transmitting signaling and/or data over a wireless air interface. The transceiver 1510 may also be referred to as a transceiving unit or a communication unit, and the transceiver 1510 may include one or more radio frequency units 1512, such as Remote Radio Units (RRUs) or Active Antenna Units (AAUs), which may be used for transmission of radio frequency signals and conversion of radio frequency signals to baseband signals, and one or more antennas 1511, which may be used for radiation and reception of radio frequency signals. Alternatively, the transceiver 1510 may only include the above radio frequency units, and then the communication device 1500 may include the transceiver 1510, the memory 1521, the processor 1522 and an antenna.

The memory 1521 and the processor 1522 may be integrated or independent of each other. As shown in fig. 15, the memory 1521 and the processor 1522 may be integrated within the control unit 1520 of the communication device 1500. Illustratively, the control unit 1520 may comprise a baseband unit (BBU) of an LTE base station, which may also be referred to as a DU, or the control unit 1520 may comprise a DU and/or a CU in a base station under 5G and future radio access technologies. The control unit 1520 may be formed by one or more antenna panels, where a plurality of antenna panels may jointly support a radio access network of a single access system (e.g., an LTE network), and a plurality of antenna panels may also respectively support radio access networks of different access systems (e.g., an LTE network, a 5G network, or other networks). The memory 1521 and processor 1522 may serve one or more antenna panels. That is, the memory 1521 and the processor 1522 may be separately provided on each antenna panel. Multiple antenna panels may share the same memory 1521 and processor 1522. In addition, necessary circuitry can be provided on each antenna panel, for example, to enable coupling of the memory 1521 and the processor 1522. The above transceivers 1510, processors 1522, and memories 1521 may be connected by a bus structure and/or other connection medium.

Based on the structure shown in fig. 15, when the communication device 1500 needs to transmit data, the processor 1522 may perform baseband processing on the data to be transmitted, and then output a baseband signal to the rf unit, and the rf unit performs rf processing on the baseband signal and then transmits the rf signal in the form of electromagnetic waves through the antenna. When there is data to be transmitted to the communication device 1500, the radio frequency unit receives a 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 processes the data.

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

Fig. 16 shows a simplified schematic diagram of a terminal device. For ease of understanding and illustration, in fig. 16, the terminal device is exemplified by a mobile phone. As shown in fig. 16, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input-output device. The processor is mainly used for processing communication protocols and communication data, controlling the vehicle-mounted unit, executing software programs, processing data of the software programs and the like. The memory is used primarily for storing software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user. It should be noted that some kinds of apparatuses may not have input/output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs baseband signals to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signals and sends the radio frequency signals to the outside in the form of electromagnetic waves through the antenna. When data is sent to the device, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the 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. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be provided 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 rf circuit having the transceiving function may be regarded as a transceiving unit of the apparatus, and the processor having the processing function may be regarded as a processing unit of the apparatus. As shown in fig. 16, the apparatus includes a transceiver 1610 and a processing 1620. The transceiver 1610 may also be referred to as a transceiver, a transceiving means, etc. The processing unit 1620 may also be referred to as a processor, a processing board, a processing module, a processing device, etc. Alternatively, a device for implementing a receiving function in the transceiving unit 1610 may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiving unit 1610 may be regarded as a transmitting unit, that is, the transceiving unit 1610 includes a receiving unit and a transmitting unit. Transceiver unit 1610 may also sometimes be referred to as a transceiver, or transceiving circuitry, etc. A receiving unit may also be referred to as a receiver, or receiving circuit, etc. A transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc.

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

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

A computer-readable storage medium including instructions, when executed on a computer, causes the computer to execute the method performed by the network device and the terminal device in fig. 3.

Also provided in the embodiments of the present application is a computer program product, which includes instructions that, when executed on a computer, cause the computer to execute the method performed by the network device and the terminal device in fig. 3.

The embodiment of the application provides a chip system, which comprises a processor and a memory, and is used for realizing the functions of network equipment and terminal equipment in the method. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

The method provided by the embodiment of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network appliance, a user device, or other programmable apparatus. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL), or wireless (e.g., infrared, wireless, microwave, etc.).

Various modifications and alterations to this application may occur to those skilled in the art without departing from the scope of this application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method for sending a random access preamble is applied to a terminal device, wherein the terminal device is a first type terminal device, and the method comprises the following steps:

receiving first configuration information from a network device, wherein the first configuration information is used for indicating a first corresponding relationship between a first SSB set and a first RO set, the first RO set comprises ROs in a first BWP in a second RO set, the first BWP corresponds to a first type of terminal device, the second RO set is 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.

2. The method of claim 1, wherein the first set of ROs consists of ROs, from the second set of ROs, that are located within the first BWP.

3. The method of claim 1 or 2, wherein the second correspondence of the second set of ROs and the second set of SSBs is configured by second configuration information.

4. The method of claim 3, wherein the first correspondence indicates that M SSBs map to 1 RO, the second correspondence indicates that N SSBs map to 1 RO, and wherein N and M are not the same.

5. The method of claim 3, wherein the first configuration information comprises a number P of ROs that the first set of ROs comprises, wherein the first correspondence indicates that Q SSBs are mapped to the P ROs, wherein Q is the number of SSBs that the second set of SSBs comprises, wherein the Q SSBs are in one-to-one correspondence with the Q sets of random access preambles, and wherein the Q sets of random access preambles consist of at least one random access preamble associated with the P ROs.

6. The method of any of claims 1-5, wherein the first set of ROs that are different at a first time unit and a second time unit.

7. The method of claim 5, wherein, within a first cycle, an index, of a starting RO in the first set of ROs satisfies:

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

8. The method of any one of claims 1-7, further comprising:

and sending first capability information to the network equipment, wherein the first capability information is used for indicating whether the terminal equipment supports BWP and does not contain SSB.

9. The method of claim 8, wherein the first capability information is reported through a preamble used by a random access message 1 or through an RO resource used by the random access message 1; alternatively, the first and second electrodes may be,

the first capability information is reported through a random access message 3; alternatively, the first and second electrodes may be,

and reporting the first capability information through PUCCH resources carrying HARQ-ACK feedback information aiming at the random access message 4.

10. A method for receiving a random access preamble, comprising:

sending first configuration information and second configuration information, wherein the first configuration information is used for indicating a first corresponding relationship between a first SSB set and a first RO set, and the second configuration information is used for indicating a second corresponding relationship between a second SSB set and a second RO set, wherein the first RO set comprises ROs in the second RO set which are located in a first BWP, 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;

and receiving a random access preamble from a terminal device based on the first RO set, wherein the terminal device is the first type terminal device.

11. The method of claim 10, wherein the first set of ROs consists of ROs, from the second set of ROs, that are located within the first BWP.

12. The method of claim 10 or 11, wherein the first correspondence indicates that M SSBs map to 1 RO, the second correspondence indicates that N SSBs map to 1 RO, and wherein N and M are not the same.

13. The method of claim 10 or 11, wherein the first configuration information comprises a number P of ROs that the first set of ROs comprises, and wherein the first correspondence indicates that Q SSBs are mapped to the P ROs, and wherein Q is the number of SSBs that the second set of SSBs comprises, wherein the Q SSBs are in one-to-one correspondence with the Q sets of random access preambles, and wherein the Q sets of random access preambles consist of at least one random access preamble associated with the P ROs.

14. The method of any of claims 10-13, wherein the first set of ROs that are different at a first time unit and a second time unit.

15. The method of claim 14, wherein, during a first cycle, an index, of a starting RO in the first set of ROs, satisfies:

16. The method of any one of claims 10-15, further comprising:

receiving first capability information from the terminal device, wherein the first capability information is used for indicating whether the terminal device supports BWP and does not contain SSB.

17. The method of claim 16, wherein the first capability information is reported through a preamble used by a random access message 1 or through an RO resource used by the random access message 1; alternatively, the first and second electrodes may be,

reporting the first capability information through a random access message 3; alternatively, the first and second electrodes may be,

and the first capability information is reported through BWP where PDCCH bearing HARQ-ACK feedback information aiming at the random access message4 is located.

18. A communication device is a terminal equipment of a first type, the communication device comprises a processing module and a transceiver module, wherein,

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

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

the transceiver module is further configured to send a random access preamble to the network device based on the first RO set.

19. The communications apparatus of claim 18, wherein the first set of ROs consists of ROs in the second set of ROs that are within the first BWP.

20. The communications device of claim 18 or 19, wherein the second correspondence of the second set of ROs and the second set of SSBs is configured by second configuration information.

21. The communications apparatus of claim 20, wherein the first correspondence indicates that M SSBs map to 1 RO, the second correspondence indicates that N SSBs map to 1 RO, and wherein N and M are not the same.

22. The communications apparatus of claim 20, wherein the first configuration information comprises a number P of ROs that the first set of ROs comprises, and the first correspondence indicates that Q SSBs are mapped to the P ROs, the Q being the number of SSBs that the second set of SSBs comprises, the Q SSBs being in one-to-one correspondence with the Q sets of random access preambles, the Q sets of random access preambles consisting of at least one random access preamble associated with the P ROs.

23. The communications device of any of claims 18-22, wherein a first time unit and a second time unit correspond to different sets of the first ROs.

24. The communications apparatus as claimed in any of claims 18-23, wherein the transceiver module is further configured to:

sending first capability information to the network device, the first capability information indicating whether the communication apparatus supports BWP without SSB.

25. The communications apparatus of claim 24, wherein the first capability information is reported through a preamble used by a random access message 1 or through an RO resource used by the random access message 1; alternatively, the first and second liquid crystal display panels may be,

the first capability information is reported through a random access message 3; alternatively, the first and second liquid crystal display panels may be,

26. A communication device, comprising a processing module and a transceiver module, wherein,

the processing module is configured to determine first configuration information and second configuration information, where the first configuration information is used to indicate a first corresponding relationship between a first SSB set and a first RO set, and the second configuration information is used to indicate a second corresponding relationship between a second SSB set and a second RO set, where the first RO set includes ROs in the second RO set that are located within a first BWP, the first BWP corresponds to a first class of terminal devices, the second RO set is located within a second BWP, and the second BWP corresponds to a second class of terminal devices;

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 class of terminal device.

27. The communications apparatus of claim 26, wherein the first set of ROs consists of ROs in the second set of ROs that are within the first BWP.

28. The communications apparatus of claim 26 or 27, wherein the first correspondence indicates that M SSBs map to 1 RO, the second correspondence indicates that N SSBs map to 1 RO, and N and M are not the same.

29. The communications apparatus of claim 26 or 27, wherein the first configuration information comprises a number P of ROs that the first set of ROs comprises, and the first correspondence indicates that Q SSBs are mapped to the P ROs, the Q being the number of SSBs that the second set of SSBs comprises, the Q SSBs being in one-to-one correspondence with the Q sets of random access preambles, the Q sets of random access preambles consisting of at least one random access preamble associated with the P ROs.

30. The communications device of any of claims 26-29, wherein a first time unit and a second time unit correspond to different sets of the first ROs.

31. The communications device of any of claims 26-30, wherein the transceiver module is further configured to:

32. The communications apparatus of claim 31, wherein the first capability information is reported through a preamble used by a random access message 1 or through an RO resource used by the random access message 1; alternatively, the first and second electrodes may be,

33. A communication device, comprising a processor and a communication interface, and a memory, the processor coupled with the communication interface for invoking computer instructions in the memory to cause the communication device to perform the method of any one of claims 1-9.

34. A communication apparatus, comprising a processor and a communication interface, and a memory, the processor coupled with the communication interface to invoke computer instructions in the memory to cause the communication apparatus to perform the method of any of claims 8-17.

35. A computer-readable storage medium having stored thereon computer instructions which, when executed, cause the computer to perform the method of any one of claims 1-9 or cause the computer to perform the method of any one of claims 8-17.