CN115942338A

CN115942338A - Message transmission method and device

Info

Publication number: CN115942338A
Application number: CN202111168925.3A
Authority: CN
Inventors: 侯海龙; 金哲; 余政; 温容慧
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2023-04-07
Also published as: WO2023051488A1

Abstract

The application provides a message transmission method and a device, wherein the method comprises the following steps: when the search space corresponding to the first message is not configured on the first downlink bandwidth part, if the search space is configured on the second downlink bandwidth part, the terminal device can listen to the first message on the second downlink bandwidth part by using the search space; if the search space is not configured on the second downlink bandwidth part, the terminal device may listen to the first message on the third downlink bandwidth part using the search space; wherein the third downlink bandwidth portion is determined according to COREST0 or configured through SIB1. By the method, when the search space corresponding to the first message is not configured on the first downlink bandwidth part or the second downlink bandwidth part, the terminal device can monitor the first message on the third downlink bandwidth part, and the situation that the terminal device cannot receive the first message is avoided.

Description

Message transmission method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting a message.

Background

The New Radio (NR) of the fifth generation (5G) mobile communication technology is a global standard for a new air interface design based on Orthogonal Frequency Division Multiplexing (OFDM). In the 5G mobile communication technology, a low-capability terminal device is proposed, which is referred to as an NR low-capability (NR red) terminal device, and hereinafter referred to as a red terminal device, compared to a conventional (legacy) terminal device.

Currently, in an initial access phase, a network device configures an initial downlink bandwidth part (BWP) and an initial uplink BWP for a terminal device, and after the terminal device enters a Radio Resource Control (RRC) connected state, the network device additionally configures one or more user-specific uplink BWPs and one or more user-specific downlink BWPs for the terminal device.

After introducing the recmap endpoint device in 5G, on the basis of the existing initial downlink BWP and initial uplink BWP, it is further proposed to additionally configure separate initial downlink BWP and initial uplink BWP for the recmap endpoint device, that is, for the recmap endpoint device, two initial downlink BWPs and two initial uplink BWPs may be configured.

In the case of configuring multiple initial downlink BWPs and initial uplink BWPs for a reccap terminal device, and multiple user-specific uplink BWPs and multiple user-specific downlink BWPs, there is no clear solution on how to efficiently communicate with the network side.

Disclosure of Invention

The application provides a message transmission method and a message transmission device, which are used for solving the problem of how to communicate with a network side by a terminal device.

In a first aspect, the present application provides a message transmission method, where an execution subject of the method is a terminal device or a chip or a module in the terminal device, and the terminal device is taken as the execution subject and described herein as an example. The method comprises the following steps: determining to receive a first message; and if the search space corresponding to the first message is not configured on the first downlink bandwidth part, and the terminal equipment configures the search space on the second downlink bandwidth part, monitoring the first message by using the search space on the second downlink bandwidth part.

By implementing the above method, when the search space corresponding to the first message is not configured on the first downlink bandwidth part, the terminal device may monitor the first message on the second downlink bandwidth part, so as to avoid that the terminal device cannot receive the first message.

In one possible implementation, when the search space is not configured on the second downlink bandwidth part, the terminal device listens to the first message on the third downlink bandwidth part using the search space; wherein the third downlink bandwidth part is a downlink bandwidth part determined according to the control resource set 0; alternatively, the third downlink bandwidth portion is configured by the system information block 1.

By implementing the above method, when the search spaces corresponding to the first message are not configured on the first downlink bandwidth part and the second downlink bandwidth part, the terminal device may monitor the first message on the third downlink bandwidth part, so as to avoid that the terminal device cannot receive the first message.

In one possible implementation, the first message is at least one of: a paging message; a random access response message; a system information block 1; other system information.

In one possible implementation, the second downlink bandwidth portion supports no configuration of the search space.

In one possible implementation, the second downlink bandwidth part is a first initial downlink bandwidth part, and the first initial downlink bandwidth part is an initial downlink bandwidth part configured for the first type of terminal device separately.

In one possible implementation, the first initial downlink bandwidth portion is determined according to a first initial uplink bandwidth portion, and the first initial uplink bandwidth portion is configured for the network device.

In a possible implementation manner, the second downlink bandwidth part is configured by the network device for the terminal device in the radio resource control connected state.

In one possible implementation, if the first downlink bandwidth portion is an active bandwidth portion, the method further includes: when the terminal equipment is switched from the first downlink bandwidth part to the second downlink bandwidth part, switching from the first uplink bandwidth part to the second uplink bandwidth part; or when the terminal equipment is switched from the first downlink bandwidth part to the third uplink bandwidth part, switching from the first uplink bandwidth part to the third uplink bandwidth part; wherein the first upstream bandwidth portion is associated with a first downstream bandwidth portion, the second upstream bandwidth portion is associated with a second downstream bandwidth portion, and the third upstream bandwidth portion is associated with a third downstream bandwidth portion.

In a possible implementation manner, if the first message is a random access response message, if the first uplink bandwidth part is switched to the second uplink bandwidth part, the method further includes: and transmitting the physical random access channel by using the physical random access channel opportunity resource in the second uplink bandwidth part.

In a possible implementation manner, if the first message is a random access response message, and if the first uplink bandwidth portion is switched to the third uplink bandwidth portion, the method further includes: and transmitting the physical random access channel by using the physical random access channel opportunity resource in the third uplink bandwidth part.

In a possible implementation manner, the third downlink bandwidth part is included in the bandwidth part set supported by the terminal device, and the terminal device supports and configures N-1 bandwidth parts except for the third downlink bandwidth part; or, the third downlink bandwidth part is not included in the bandwidth part set supported by the terminal device, and the terminal device supports and configures N bandwidth parts except the third downlink bandwidth part; wherein, N is the number of bandwidth parts in the bandwidth part set supported by the terminal device, and N is an integer greater than 0.

In one possible implementation, a first message is determined to be received, where the first message is a paging message; if the search space corresponding to the first message is not configured on the first downlink bandwidth part, receiving system information on the first downlink bandwidth part, wherein the paging message is used for indicating to update the system information, and the first downlink bandwidth part is an activated bandwidth part;

in a second aspect, the present application provides a message transmission method, where an execution subject of the method is a network device or a chip or a module in the network device, and the network device is taken as the execution subject and described here as an example. The method comprises the following steps: the network equipment determines to send a first message; and if the search space corresponding to the first message is not configured on the first downlink bandwidth part, the network equipment schedules the first message in the search space on the second downlink bandwidth part when the search space is configured on the second downlink bandwidth part.

By implementing the above method, when the search space corresponding to the first message is not configured on the first downlink bandwidth portion, the network device may schedule the first message on the second downlink bandwidth portion, so as to avoid that the first message cannot be received by the terminal device.

In one possible implementation, when no search space is configured on the second downlink bandwidth portion, the network device schedules the first message in a search space on the third downlink bandwidth portion; wherein the third downlink bandwidth part is a downlink bandwidth part determined according to the control resource set 0; alternatively, the third downlink bandwidth portion is configured by the system information block 1.

By implementing the above method, when the search spaces corresponding to the first message are not configured on the first downlink bandwidth part and the second downlink bandwidth part, the network device may schedule the first message on the third downlink bandwidth part, so as to avoid that the first message cannot be received by the terminal device.

In one possible implementation, the second downlink bandwidth part is a first initial downlink bandwidth part, and the first initial downlink bandwidth part is an initial downlink bandwidth part configured for the first type terminal device separately.

In one possible implementation, when the first message is scheduled in the search space on the second downlink bandwidth part, the uplink message of the terminal device is scheduled in the second uplink bandwidth part; or when the first message is scheduled in the search space on the third downlink bandwidth part, scheduling the uplink message of the terminal equipment in the third uplink bandwidth part;

wherein the first upstream bandwidth portion is associated with a first downstream bandwidth portion, the second upstream bandwidth portion is associated with a second downstream bandwidth portion, and the third upstream bandwidth portion is associated with a third downstream bandwidth portion.

In a possible implementation manner, if the first message is a random access response message, the method further includes: and receiving the physical random access channel from the terminal equipment through the physical random access channel opportunity resource in the second uplink bandwidth part.

In a possible implementation manner, if the first message is a random access response message, the method further includes: and receiving the physical random access channel from the terminal equipment through the physical random access channel opportunity resource in the third uplink bandwidth part.

In a third aspect, the present application provides a message transmission method, where an execution subject of the method is a terminal device or a chip or a module in the terminal device, and the terminal device is taken as the execution subject and described here as an example. The method comprises the following steps: and if the resource corresponding to the second message is not configured on the first uplink bandwidth part, and the resource is configured on the second uplink bandwidth part, the second message is sent on the second uplink bandwidth part by using the resource.

By implementing the above method, when the resource corresponding to the second message is not configured on the first uplink bandwidth part, the terminal device may send the second message on the second uplink bandwidth part, so as to improve the flexibility of message transmission and avoid that the second message cannot be sent.

In a possible implementation manner, when no resource is configured on the second uplink bandwidth part, the resource is used to send the second message on the third uplink bandwidth part; wherein the third uplink bandwidth part is an uplink bandwidth part determined according to the control resource set 0; alternatively, the third uplink bandwidth portion is configured by the system information block 1.

In a fourth aspect, the present application provides a message transmission method, where an execution subject of the method is a network device or a chip or a module in the network device, and the description is given by taking the network device as the execution subject. The method comprises the following steps: and if the resource corresponding to the second message is not configured on the first uplink bandwidth part, receiving the second message through the resource on the second uplink bandwidth part when the resource is configured on the second uplink bandwidth part.

By implementing the above method, when the resource corresponding to the second message is not configured on the first uplink bandwidth part, the network device may receive the second message on the second uplink bandwidth part, so as to avoid that the second message cannot be received.

In one possible implementation, when no resource is configured on the second uplink bandwidth portion, receiving a second message over the resource on a third uplink bandwidth portion; wherein the third uplink bandwidth part is an uplink bandwidth part determined according to the control resource set 0; alternatively, the third uplink bandwidth portion is configured by the system information block 1.

With reference to the third aspect or the fourth aspect, in a possible implementation manner, the second uplink bandwidth part supports non-configured resources.

With reference to the third aspect or the fourth aspect, in a possible implementation manner, the second uplink bandwidth part is a first initial uplink bandwidth part, and the first initial uplink bandwidth part is an initial uplink bandwidth part configured for the first type of terminal device separately.

With reference to the third aspect or the fourth aspect, in a possible implementation manner, the first initial uplink bandwidth portion is determined according to the first initial downlink bandwidth portion, and the first initial downlink bandwidth portion is configured for the network device.

With reference to the third aspect or the fourth aspect, in a possible implementation manner, the second uplink bandwidth part is configured by the network device for the terminal device in the radio resource control connection state.

With reference to the third aspect or the fourth aspect, in a possible implementation manner, the second message is a random access preamble, a physical random access channel, or a random access message 1.

In a fifth aspect, the present application provides a message transmission method, where an execution subject of the method is a terminal device or a chip or a module in the terminal device, and the terminal device is taken as the execution subject and described here as an example. The method comprises the following steps: if the search space corresponding to the first message is not configured on the first initial downlink bandwidth part, monitoring the first message on the second initial downlink bandwidth part by using the search space; wherein the second initial downlink bandwidth part is a downlink bandwidth part determined according to the control resource set 0; alternatively, the second initial downlink bandwidth portion is configured by the system information block 1.

By implementing the above method, when the search space corresponding to the first message is not configured on the first initial downlink bandwidth part, the terminal device may monitor the first message on the second initial downlink bandwidth part, so as to avoid that the terminal device cannot receive the first message.

In a sixth aspect, the present application provides a message transmission method, where an execution subject of the method is a network device or a chip or a module in the network device, and the description is given by taking the network device as the execution subject. The method comprises the following steps: if the search space corresponding to the first message is not configured on the first initial downlink bandwidth part, scheduling the first message in the search space on the second initial downlink bandwidth part; wherein the second initial downlink bandwidth part is a downlink bandwidth part determined according to the control resource set 0; alternatively, the second initial downlink bandwidth portion is configured by the system information block 1.

By implementing the above method, when the search space corresponding to the first message is not configured on the first initial downlink bandwidth part, the network device may schedule the first message on the second initial downlink bandwidth part, so as to avoid that the first message cannot be received by the terminal device.

With reference to the fifth or sixth aspect, in one possible implementation manner, the first initial downlink bandwidth portion supports a non-configured search space.

With reference to the fifth aspect or the sixth aspect, in a possible implementation manner, the first initial downlink bandwidth part is an initial downlink bandwidth part configured for the first type of terminal device separately.

With reference to the fifth aspect or the sixth aspect, in a possible implementation manner, the first initial downlink bandwidth portion is determined according to a first initial uplink bandwidth portion, and the first initial uplink bandwidth portion is configured for the network device.

With reference to the fifth aspect or the sixth aspect, in a possible implementation manner, the first initial downlink bandwidth portion is an active bandwidth portion, and the method further includes: switching from the first initial upstream bandwidth portion to the second initial upstream bandwidth portion when switching from the first initial downstream bandwidth portion to the second initial downstream bandwidth portion; wherein the first initial upstream bandwidth portion is associated with a first initial downstream bandwidth portion and the second initial upstream bandwidth portion is associated with a second initial downstream bandwidth portion.

With reference to the fifth aspect or the sixth aspect, in a possible implementation manner, if the first message is a random access response message, the method further includes: and transmitting the physical random access channel in the physical random access channel opportunity resource of the first initial uplink bandwidth part.

With reference to the fifth aspect or the sixth aspect, in a possible implementation manner, the first message is at least one of: a paging message; a random access response message; a system information block 1; other system information.

In a seventh aspect, the present application provides a message transmission method, where an execution subject of the method is a terminal device or a chip or a module in the terminal device, and the terminal device is taken as the execution subject to be described here as an example. The method comprises the following steps: if the resource corresponding to the second message is not configured on the first initial uplink bandwidth part, the resource corresponding to the second message is used for sending the second message on the second initial uplink bandwidth part; wherein the second initial uplink bandwidth portion is determined according to control resource set 0; alternatively, the second initial uplink bandwidth portion is configured by the system information block 1.

By implementing the above method, when the resource corresponding to the second message is not configured on the first initial uplink bandwidth part, the terminal device may send the second message on the second initial uplink bandwidth part, so as to improve the flexibility of message transmission and avoid that the second message cannot be sent.

In an eighth aspect, the present application provides a message transmission method, where an execution subject of the method is a network device or a chip or a module in the network device, and the description is given by taking the network device as the execution subject. The method comprises the following steps: if the resource corresponding to the second message is not configured on the first initial uplink bandwidth part, receiving the second message on the second initial uplink bandwidth part through the resource corresponding to the second message; wherein the second initial uplink bandwidth portion is determined according to the control resource set 0; alternatively, the second initial uplink bandwidth portion is configured by the system information block 1.

By implementing the above method, when the resource corresponding to the second message is not configured on the first initial uplink bandwidth portion, the network device may receive the second message on the second initial uplink bandwidth portion, so as to avoid that the second message cannot be received.

In a ninth aspect, the present application also provides a communication device having any one of the methods provided for implementing the first or third or fifth or seventh aspects. The communication device may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

In one possible implementation, the communication device includes: a processor configured to support the communication apparatus to perform the corresponding functions of the network device in the above-illustrated method. The communication device may also include a memory, which may be coupled to the processor, that stores program instructions and data necessary for the communication device. Optionally, the communication apparatus further includes an interface circuit, which is configured to support communication between the communication apparatus and a terminal device or the like.

In one possible implementation manner, the communication device includes corresponding functional modules, which are respectively used for implementing the steps in the above method. The functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described functions.

In a possible implementation manner, the structure of the communication device includes a processing unit and a communication unit, and these units may perform corresponding functions in the above method example, specifically refer to the description in the method provided in the first aspect, the third aspect, the fifth aspect, or the seventh aspect, and are not described herein again.

In a tenth aspect, the present application also provides a communication device having any one of the methods provided for implementing the second or fourth or sixth or eighth aspects. The communication device may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

In one possible implementation, the communication device includes: a processor configured to enable the communication apparatus to perform the respective functions of the terminal device in the above-illustrated method. The communication device may also include a memory, which may be coupled to the processor, that retains program instructions and data necessary for the communication device. Optionally, the communication apparatus further comprises an interface circuit, which is configured to support communication between the communication apparatus and a device such as a network device.

In a possible implementation manner, the structure of the communication device includes a processing unit and a communication unit, and these units may perform corresponding functions in the above method example, specifically refer to the description in the method provided in the second aspect, the fourth aspect, the sixth aspect, or the eighth aspect, and are not described herein again.

In an eleventh aspect, there is provided a communication device comprising a processor and an interface circuit, wherein the interface circuit is configured to receive signals from other communication devices except the communication device and transmit the signals to the processor or send the signals from the processor to other communication devices except the communication device, and the processor is configured to execute computer programs or instructions stored in the memory to implement the method in any possible implementation manner of the first aspect, the third aspect, the fifth aspect or the seventh aspect. Optionally, the apparatus further comprises a memory having stored therein a computer program or instructions.

In a twelfth aspect, there is provided a communication device comprising a processor and an interface circuit, wherein the interface circuit is configured to receive signals from other communication devices except the communication device and transmit the signals to the processor or transmit the signals from the processor to other communication devices except the communication device, and the processor is configured to execute computer programs or instructions stored in the memory to implement the method in any possible implementation manner of the second aspect, the fourth aspect, the sixth aspect or the eighth aspect. Optionally, the apparatus further comprises a memory, the memory having stored therein a computer program or instructions.

In a thirteenth aspect, there is provided a computer-readable storage medium having stored therein a computer program or instructions which, when run on a computer, cause the computer to implement the method of any possible implementation of the aforementioned first or third or fifth or seventh aspect.

In a fourteenth aspect, there is provided a computer readable storage medium having stored therein a computer program or instructions which, when run on a computer, cause the computer to implement the method of any possible implementation of the aforementioned second or fourth or sixth or eighth aspects.

A fifteenth aspect provides a computer program product having computer readable instructions stored thereon, which, when run on a computer, cause the computer to implement the method of any possible implementation of the first or third aspect or the fifth or seventh aspect.

A sixteenth aspect provides a computer program product having computer readable instructions stored thereon, which, when run on a computer, cause the computer to implement the method of any possible implementation of the second or fourth aspect or the sixth or eighth aspect.

A seventeenth aspect provides a chip, which includes a processor and may further include a memory, where the processor is coupled with the memory and configured to execute a computer program or instructions stored in the memory, so that the chip implements the method in any possible implementation manner of the foregoing first aspect, the third aspect, the fifth aspect, or the seventh aspect.

In an eighteenth aspect, a chip is provided, which includes a processor and may further include a memory, and the processor is coupled with the memory and configured to execute a computer program or instructions stored in the memory, so that the chip implements the method in any possible implementation manner of the foregoing second aspect, fourth aspect, sixth aspect, or eighth aspect.

A nineteenth aspect provides a communication system comprising the apparatus (e.g. terminal device) of the ninth aspect and the apparatus (e.g. network device) of the tenth aspect.

Drawings

Fig. 1 is a schematic diagram of a network architecture suitable for use in the embodiments of the present application;

fig. 2 is a schematic flow chart of a message transmission method according to an embodiment of the present application;

fig. 3 is a schematic flow chart of a message transmission method according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

The embodiments of the present application will be described in detail below with reference to the drawings attached hereto.

The embodiment of the application can be applied to various mobile communication systems, such as: other communication systems such as NR system, long Term Evolution (LTE) system, and future communication system, and the like, and are not limited herein.

For the convenience of understanding the embodiments of the present application, a communication system applicable to the embodiments of the present application will be first described in detail by taking the communication system shown in fig. 1 as an example. Fig. 1 shows a schematic diagram of a communication system suitable for use in embodiments of the present application. As shown in fig. 1, the base station and the terminal apparatuses 1 to 6 constitute a communication system in which the base station transmits information to one or more of the terminal apparatuses 1 to 6. Furthermore, terminal devices 4 to 6 also constitute a communication system in which terminal device 5 can transmit information to one or more of terminal devices 4 and 6.

In the embodiment of the application, the terminal device may be a device with a wireless transceiving function, which may be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal device may be a User Equipment (UE), wherein the UE includes a handheld device, a vehicle-mounted device, a wearable device, or a computing device having wireless communication functionality. Illustratively, the UE may be a mobile phone (mobile phone), a tablet computer, or a computer with wireless transceiving function. The terminal device may also be a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, and the like. In the embodiment of the present application, the apparatus for implementing the function of the terminal device may also be an apparatus capable of supporting the terminal device to implement the function, for example, a system on chip, which may be installed in the terminal, and the system on chip may be composed of a chip, and may also include a chip and other discrete devices.

The terminal device in the present application may be a first type terminal device or a second type terminal device, and the first type terminal device and the second type terminal device may have at least one of the following distinguishing features:

1. the bandwidth capabilities are different, e.g. the maximum bandwidth supported by the first type of terminal device is smaller than the maximum bandwidth supported by the second type of terminal device.

2. The number of transceiving antennas is different, for example, the number of transceiving antennas supported by the first type terminal device is smaller than the number of transceiving antennas supported by the second type terminal device.

3. The uplink maximum transmission power is different, for example, the uplink maximum transmission power supported by the first type terminal device is smaller than the uplink maximum transmission power supported by the second type terminal device.

4. The protocol versions are different. For example, the first type of terminal device may be a terminal device in NR version 17 (release-17, rel-17) or in later versions of NR Rel-17. The second type of terminal device may be, for example, a terminal device in NR version 15 (release-15, rel-15) or NR version 16 (release-16, rel-16). The second type of terminal equipment may also be referred to as NR legacy (NR legacy) terminal equipment.

5. The processing power for the data is different. For example, the minimum time delay between the reception of the downlink data and the transmission of the feedback to the downlink data by the first type terminal device is greater than the minimum time delay between the reception of the downlink data and the transmission of the feedback to the downlink data by the second type terminal device; and/or the minimum time delay between the first type terminal equipment sending the uplink data and receiving the feedback of the uplink data is larger than the minimum time delay between the second type terminal equipment sending the uplink data and receiving the feedback of the uplink data.

6. The supported Carrier Aggregation (CA) capabilities are different, e.g., the second type terminal device may support carrier aggregation, while the first type terminal device does not support carrier aggregation; for another example, the second type terminal device and the first type terminal device both support carrier aggregation, but the maximum number of carrier aggregation supported by the second type terminal device is greater than the maximum number of carrier aggregation supported by the first type terminal device, for example, the second type terminal device may support aggregation of at most 5 carriers or 32 carriers, while the first type terminal device supports aggregation of at most 2 carriers simultaneously.

7. The communication modes are different, for example, the second type terminal device supports full duplex Frequency Division Duplex (FDD), while the first type terminal device supports only half duplex FDD.

8. The processing capacity is different, and the processing capacity of the first type terminal equipment is smaller than that of the second type terminal equipment.

The second type of terminal device has, but is not limited to, the above distinguishing features with the first type of terminal device.

In one possible implementation manner, the first type terminal device may refer to a Reduced capability (REDCAP) terminal device, or the first type terminal device may also refer to a low capability terminal device, a Reduced capability terminal device, a REDCAP UE, a Reduced Capacity UE, a narrow-band NR (NB-NR) UE, and the like. The second type of terminal device may refer to a legacy capability or a normal capability or a high capability terminal device, and may also be referred to as a legacy (legacy) terminal device or a normal (normal) terminal device.

In this embodiment of the present application, the network device may be a wireless access device in various systems, and may be a next generation base station (next generation NodeB, gNB) in a 5G mobile communication system, a base station (base station), an evolved NodeB (eNodeB), a Transmission Reception Point (TRP), an access network device in an open radio access network (O-RAN), a next generation base station in a sixth generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a wireless fidelity (WiFi) system, and the like; or may be a module or unit that performs a part of the functions of the base station, for example, a Central Unit (CU), a Distributed Unit (DU), a centralized unit control plane (CU-CP) module, or a centralized unit user plane (CU-UP) module.

In the embodiments of the present application, a bandwidth part (BWP) is referred to. The BWP is a segment of continuous resources in the frequency domain, and may be divided into an uplink BWP and a downlink BWP according to the transmission direction, and the uplink BWP and the downlink BWP are used for uplink transmission and downlink transmission, respectively. The present application is described by taking BWP as an example, and more generally, BWP may be referred to as frequency domain resource, etc., and is not limited to the name BWP, when BWP is described by other terms, the frequency resource corresponding to the term has the same characteristics as BWP, i.e. is composed of consecutive Resource Blocks (RBs), the frequency range is not greater than the channel bandwidth capability supported by the first type of terminal device, and data transmission is performed only in the activated frequency resource.

In the initial access phase, the network side may configure the terminal device with an initial uplink BWP and an initial downlink BWP, and after the terminal device enters the RRC connected state, the network side may additionally configure the terminal device with one or more user-specific uplink BWPs and one or more user-specific downlink BWPs. The user-specific BWP may also be referred to as RRC-configured BWP (RRC-configured BWP), and hereinafter collectively referred to as user-specific BWP for convenience of description.

For the first type of terminal device and the second type of terminal device, in an initial access phase, the network device may configure an initial downlink BWP, and the network device may configure a system information block 1 (sib1) Search Space (SS), a paging message (paging) SS, other System Information (OSI) SS, and a Random Access (RA) SS on the initial downlink BWP, where the network device is respectively configured to monitor information such as SIB1, paging, OSI, and Random Access Response (RAR) messages on the initial downlink BWP.

Before receiving SIB1 and when receiving SIB1, the location and bandwidth of the initial downlink BWP are determined by a control resource set0 (CORESET 0 ), which may be specifically defined by a frequency domain resource of CORESET0, and configuration information of CORESET0 is included in a Master Information Block (MIB), and the terminal device may determine CORESET0 by acquiring the MIB to determine the initial downlink BWP.

After receiving SIB1, the network device may also reconfigure the location and bandwidth of the initial downlink BWP in SIB1, but the reconfigured location and bandwidth of the initial downlink BWP must be validated after the terminal device enters the RRC connected state, before the location and bandwidth of the initial downlink BWP are still defined by the frequency domain resources of CORESET 0. If the network device does not reconfigure the location and bandwidth of the initial downlink BWP in SIB1, the location and bandwidth of the initial downlink BWP are always defined by the frequency domain resources of CORESET 0.

For the first type of terminal device and the second type of terminal device, in the initial access phase, the network device may further configure an initial uplink BWP, and the terminal device may perform uplink transmission for random access through the initial uplink BWP, for example, transmit a hybrid automatic repeat request (HARQ) feedback (feedback) Physical Uplink Control Channel (PUCCH) for PUCCH 4 in a random access procedure, where Msg1 is sent through a Physical Random Access Channel (PRACH), and the network device configures a PRACH opportunity (RO) resource on the initial uplink BWP for sending the PRACH.

The random access process may sequentially include 4 steps of message flows: the terminal equipment sends a message 1, wherein the message 1 can refer to a random access preamble; the network device sends a message 2, where the message 2 may refer to a Random Access Response (RAR) message; the terminal equipment sends a message 3, wherein the message 3 can be a response message of the message 2; the network device sends message 4, which message 4 may refer to a contention resolution message.

If the terminal device adopts a Time Division Duplex (TDD) band, the uplink BWP and the downlink BWP are paired and have the same BWP Identifier (ID), and the uplink BWP and the downlink BWP with the same BWP ID have the same center frequency point, and when the uplink BWP or the downlink BWP is switched, the associated downlink BWP or the uplink BWP is switched at the same time. If the terminal device uses the FDD band, there is no such limitation.

It was described above that in the initial access phase, the network device will configure an initial upstream BWP for the first type of terminal device and the second type of terminal device. In addition, the network device may additionally configure the first type terminal device with separate initial downlink BWP and initial uplink BWP, that is, for the first type terminal device, it may be configured with two initial uplink BWP and two initial downlink BWP.

In this embodiment, the additional configuration of the separate initial downlink BWP for the first type terminal device by the network device is referred to as a first initial downlink BWP, and the additional configuration of the separate initial uplink BWP for the first type terminal device is referred to as a first initial uplink BWP. In the initial access phase, the initial downlink BWP configured by the network device through CORESET0 or reconfigured by SIB1 is referred to as a second initial downlink BWP, where the second initial downlink BWP may be understood as configured for a second type terminal device, and when the bandwidth of the second initial downlink BWP is not greater than the maximum bandwidth supported by the first type terminal device, the first type device may also use the second initial downlink BWP; the initial upstream BWP configured by the network device through SIB1 in the initial access phase is referred to as a second initial upstream BWP, and the second initial upstream BWP may be understood as configured by the second type terminal device, and the first type device may also use the second initial upstream BWP when the bandwidth of the second initial upstream BWP is not greater than the maximum bandwidth supported by the first type terminal device.

The second initial downlink BWP configures paging SS, RA SS, SIB1 SS and OSI SS, and the second initial uplink BWP configures RO resources. The first initial downlink BWP may support configuring a paging SS, an RA SS, an SIB1 SS, and an OSI SS, or may support not configuring at least one of the paging SS, the RA SS, the SIB1 SS, and the OSI SS; that is, for any SS described above, the network device may or may not configure the SS in the first initial downlink BWP. Accordingly, the first initial upstream BWP may or may not support configuration of the RO resource, that is, the network device may or may not configure the RO resource in the first initial upstream BWP. If the first initial uplink BWP is configured with the RO resource, the terminal device may send the PRACH through the RO resource, i.e., initiate random access.

In the embodiment of the present application, when at least one of a paging SS, an RA SS, an SIB1 SS, and an OSI SS is not configured on a first initial downlink BWP configured for a first type of terminal device on a network side, the terminal device may monitor the paging, RAR messages, SIB1, and OSI by switching to a second initial downlink BWP; when no RO resource is configured on the first initial upstream BWP configured for the first type terminal device on the network side, the terminal device may switch to the second initial downstream BWP to initiate random access, which will be described in detail below.

In the embodiments of the present application, unless otherwise specified or conflicting with respect to logic, the terms and/or descriptions in different embodiments have consistency and may be mutually cited, and technical features in different embodiments may be combined to form a new embodiment according to their inherent logic relationship.

It is to be understood that the various numerical designations referred to in this application are only for convenience of description and are not intended to limit the scope of this application. The sequence numbers of the above processes do not mean the execution sequence, and the execution sequence of the processes should be determined by the functions and the inherent logic.

The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

In the embodiment of the present application, an example of interaction between a network device and a terminal device is described, operations executed by the network device may also be executed by a chip or a module inside the network device, and operations executed by the terminal device may also be executed by a chip or a module inside the terminal device. The terminal device may be a first type terminal device.

In the embodiment of the present application, although the first type of terminal device is taken as an example for description, the illustrated embodiments are also applicable to other types of terminal devices, such as NR Rel-17 or later. For convenience of description, the first type of terminal device is taken as an example for description, and the method provided by the present application is applicable to other types of terminal devices and is not described again.

In the embodiment of the present application, the description may be separately performed according to a phase when the terminal device enters an initial access phase and a phase after the terminal device enters the initial access (that is, the terminal device is in an RRC connected state), and how the terminal device receives and sends a message in the initial access phase is described first below.

Fig. 2 is a schematic flow chart of a message transmission method according to an embodiment of the present application. Before the flow shown in fig. 2, the network device may configure a first initial upstream BWP and a first initial downstream BWP for the terminal device, and configure a second initial upstream BWP and a second initial downstream BWP, where a specific configuration process is not limited.

Optionally, S201: the network device determines to send the first message, and correspondingly, the terminal device determines to receive the first message.

Wherein the first message may include at least one of:

a paging message; a random access response message; a system information block 1; other system information.

For example, the first message is a paging message for instructing to update the system information, and when the network device determines to update the system information, the network device may determine to send the first message; correspondingly, the terminal equipment receives the first message and determines whether the system information is updated according to the first message.

For another example, the first message is a random access response message, and when the network device receives a random access preamble from the terminal device, the network device determines to send the first message; accordingly, the terminal device may determine to receive the first message after transmitting the random access preamble.

For another example, the first message is a system information block 1, the system information block 1 is a periodically broadcast message, and the system information block 1 may indicate scheduling information of other system information or may indicate configuration parameters of a cell. When the broadcast period of the system information block 1 arrives, the network device may determine to transmit a first message; accordingly, the terminal device receives the first message when it needs to receive the system information block 1 to obtain the corresponding cell configuration parameters.

For another example, the first message is other system information, the other system information may be a periodically broadcast message, and the other system information may also indicate configuration parameters of the cell. When the broadcast period of other system information arrives, the network equipment can determine to send a first message; correspondingly, when the terminal equipment needs to receive other system information to obtain the corresponding cell configuration parameters, the first message is received.

The above is merely an example, and the first message may also be other types of messages, which are not illustrated in a specific manner here.

S202: if the search space corresponding to the first message is not configured on the first initial downlink bandwidth part, the network device schedules the first message in the search space on the second initial downlink bandwidth part, and the terminal device monitors the first message on the second initial downlink bandwidth part by using the search space.

The search space corresponding to the first message may refer to a search space for scheduling the first message.

In one embodiment, if a search space corresponding to a first message is not configured on a first initial downlink bandwidth portion, a terminal device switches from the first initial downlink bandwidth portion to a second initial downlink bandwidth portion, and the terminal device listens for the first message on the second initial downlink bandwidth portion using the search space. Specifically, when the terminal device is to receive or listen to the first message, if the active bandwidth part is the first initial downlink bandwidth part, the terminal device triggers a bandwidth part switch or a Radio Frequency (RF) retune to switch to the second initial downlink bandwidth part, and listens to the first message using the search space on the second initial downlink bandwidth part.

If a search space corresponding to the first message is configured on the first initial downlink bandwidth part, the network device may schedule the first message in the search space on the first initial downlink bandwidth part, and the terminal device monitors the first message on the first initial downlink bandwidth part using the search space.

The second initial downlink bandwidth part is a downlink bandwidth part determined according to CORESET0, and the CORESET0 is determined by the terminal equipment through the MIB in the initial access stage; or, the second initial downlink bandwidth part is configured through SIB1, and the second initial downlink bandwidth part is a downlink bandwidth part obtained by reconfiguring the position and bandwidth of the downlink bandwidth part determined according to CORESET 0.

The second initial downlink bandwidth part may be further associated with a second initial uplink bandwidth part, and the second initial downlink bandwidth part and the second initial uplink bandwidth part may have the same bandwidth part identifier and the same center frequency point. The configuration of the second initial uplink bandwidth part may be the same as that of the second initial downlink bandwidth part, and is not described herein again.

When the terminal device switches from the first initial downlink bandwidth portion to the second initial downlink bandwidth portion, the terminal device also switches from the first initial uplink bandwidth portion to the second initial uplink bandwidth portion and vice versa. Accordingly, when the network device schedules the first message in the search space on the second initial downlink bandwidth part, the network device will receive the uplink message of the terminal device in the second initial uplink bandwidth part, and vice versa.

The first initial downlink bandwidth part is an initial downlink bandwidth part configured for the first type terminal device independently, that is, an initial downlink bandwidth part exclusive to the first type terminal device. The first initial downlink bandwidth part may be further associated with a first initial uplink bandwidth part, and the first initial downlink bandwidth part and the first initial uplink bandwidth part may have the same bandwidth part identifier and the same center frequency point.

How to configure the first initial downlink bandwidth part and the first initial uplink bandwidth part specifically is not limited in this embodiment of the application. In a first implementation, the network device may configure at least one of a first initial downlink bandwidth portion and a first initial uplink bandwidth portion. Specifically, the network device may configure at least one of the first initial downlink bandwidth part and the first initial uplink bandwidth part through SIB1 or RRC signaling. When the first initial downlink bandwidth part is configured through SIB1 or RRC signaling, the bandwidth and frequency domain location of the first initial downlink bandwidth part, and information such as a physical channel or a physical signal carried by the first initial downlink bandwidth part may be configured, for example, at least one of a paging SS, an RA SS, an SIB1 SS, and an OSI SS may be configured in the first initial downlink bandwidth part.

When the first initial uplink bandwidth portion is configured through SIB1 or RRC signaling, the bandwidth and frequency domain position of the first initial uplink bandwidth portion, and information such as resources carried by the first initial uplink bandwidth portion may be configured, for example, RO resources may be configured in the first initial uplink bandwidth portion.

In a second implementation manner, the network device may configure a first initial downlink bandwidth part, and the network device may configure the first initial downlink bandwidth part through SIB1 or RRC signaling, where the first initial uplink bandwidth part is determined by the first initial downlink bandwidth part, for example, a bandwidth and a frequency domain position of the first initial uplink bandwidth part may be determined by a bandwidth and a frequency domain position of the first initial downlink bandwidth part.

In a third implementation, the network device may configure a first initial uplink bandwidth portion, and the network device may configure the first initial uplink bandwidth portion through SIB1 or RRC signaling, where the first initial downlink bandwidth portion is determined by the first initial uplink bandwidth portion, for example, a bandwidth and a frequency domain position of the first initial downlink bandwidth portion may be determined by a bandwidth and a frequency domain position of the first initial uplink bandwidth portion.

In the above flow, the downlink message is transmitted between the network device and the terminal device as an example, and when the uplink message (for example, the second message) is transmitted between the network device and the terminal device, the same method may be adopted, specifically:

if the resource corresponding to the second message is not configured on the first initial uplink bandwidth part, the terminal device sends the second message on the second initial uplink bandwidth part by using the resource, and correspondingly, the network device receives the second message on the second initial uplink bandwidth part by using the resource. The second message is an uplink message, for example, the second message may be a random access message 1, and the random access message 1 may also refer to a random access preamble. The resource corresponding to the second message may refer to a resource used for transmitting the second message.

In one embodiment, if the resource corresponding to the second message is not configured on the first initial uplink bandwidth portion, the terminal device switches from the first initial uplink bandwidth portion to the second initial uplink bandwidth portion, and the terminal device sends the second message on the second initial uplink bandwidth portion using the resource corresponding to the second message. Specifically, when the terminal device sends the first message, if the active bandwidth part is the first initial upstream bandwidth part, the terminal device triggers BWP switching or RF retuning, switches to the second initial upstream bandwidth part, and sends the second message on the second initial upstream bandwidth part using the resource corresponding to the second message.

In addition, if a resource corresponding to the second message is configured on the first initial uplink bandwidth portion, the terminal device may send the second message on the first initial uplink bandwidth portion using the resource, and accordingly, the network device receives the second message on the first initial uplink bandwidth portion through the resource.

By implementing the above method, when the search space corresponding to the first message is not configured on the first initial downlink bandwidth part, the network device may schedule the first message on the second initial downlink bandwidth part configured with the search space, and the terminal device may receive the first message on the second initial downlink bandwidth part, which may ensure that the terminal device may monitor the first message in time, and avoid the situation that the terminal device cannot monitor the first message.

Similarly, when the resource corresponding to the second message is not configured on the first initial uplink bandwidth part, the terminal device may send the second message on the second initial uplink bandwidth part, and the network device may receive the second message on the second initial uplink bandwidth part, so as to avoid that the terminal device cannot send the second message.

The foregoing flow is described below by way of specific examples.

Assuming that a network device optionally configures one or more SSs of SIB1 SS, OSI SS, paging SS, RAR SS on a first initial downlink bandwidth part configured for a terminal device, and optionally configures RO resources on the first initial uplink bandwidth part; the network device is configured with SIB1 SS, OSI SS, paging SS, RAR SS on the second initial downlink bandwidth part configured for the terminal device, and configured with RO resource on the second initial uplink bandwidth part.

The RAR SS and the RO resource may be configured in pair, that is, if the RAR SS is configured on the first initial downlink bandwidth part, the RO resource is also configured on the first initial uplink bandwidth part, and if the RAR SS is not configured on the first initial downlink bandwidth part, the RO resource is also not configured on the first initial uplink bandwidth part, and vice versa.

In one implementation, the terminal device and the network device preferentially use an initial downlink bandwidth part configured with one or more SSs of SIB1 SS, OSI SS, paging SS, and RAR SS; the terminal device and the network device preferentially use the initial uplink bandwidth part configured with the RO resources.

For example, if SIB1 SS, OSI SS, paging SS, RAR SS are not configured on the first initial downlink bandwidth segment, the terminal device and the network device preferentially use the second initial downlink bandwidth segment. For another example, if no RO resource is configured on the first initial upstream bandwidth portion, the terminal device and the network device preferentially use the second initial upstream bandwidth portion.

In one implementation, the network device indicates an initial downlink bandwidth used by the terminal device through signaling.

In one implementation, the terminal device determines the initial downlink bandwidth to be used according to a predefined rule.

In one implementation, if one or more SSs of SIB1 SS, OSI SS, paging SS, and RAR SS are configured on the first initial downlink bandwidth portion, for the configured SSs, the network device may schedule a corresponding message in the SSs configured on the first initial downlink bandwidth portion, and the terminal device may listen to the corresponding message using the configured SSs on the first initial downlink bandwidth portion.

If one or more of the SIB1 SS, OSI SS, paging SS, and RAR SS is not configured on the first initial downlink bandwidth part, for the SS that is not configured, the network device does not schedule a message corresponding to the SS on the first initial downlink bandwidth part, and the terminal device does not monitor the message corresponding to the SS on the first initial downlink bandwidth part. Further, the network device schedules the message corresponding to the SS on the second initial downlink bandwidth portion, and the terminal device listens to the message corresponding to the SS using the SS on the second initial downlink bandwidth portion.

For example, for SIB1 SS, if SIB1 SS is configured on the first initial downlink bandwidth portion, the network device may schedule SIB1 in the SIB1 SS of the first initial downlink bandwidth portion; the terminal device may listen to SIB1 using SIB1 SS on the first initial downlink bandwidth portion. Certainly, the network device may also schedule SIB1 in the SIB1 SS of the second initial downlink bandwidth portion, and the terminal device may also monitor the SIB1 using the SIB1 SS on the second initial downlink bandwidth portion, which is specifically determined according to an actual situation.

If SIB1 SS is not configured on the first initial downlink bandwidth part, the network device may schedule SIB1 in SIB1 SS of the second initial downlink bandwidth part; the terminal device may switch to the second initial downlink bandwidth portion, and may listen to SIB1 using SIB1 SS on the second initial downlink bandwidth portion.

The same method can be used for both OSI SS and paging SS, and will not be described herein.

For at least one of the RAR and the random access preamble, the transmission procedure may be as follows:

assuming that the first initial downlink bandwidth portion and the first initial uplink bandwidth portion are active bandwidth portions, if the RAR SS is configured on the first initial downlink bandwidth portion and the RO resource is configured on the first uplink bandwidth portion, the terminal device may send the PRACH on the second uplink bandwidth portion over the RO resource and the network device may receive the PRACH on the second uplink bandwidth portion over the RO resource. The PRACH carries a random access preamble, and the random access preamble is used for initiating a random access process.

If the RAR SS is not configured on the first initial downlink bandwidth portion, and/or the RO resource is not configured on the first uplink bandwidth portion, the terminal device may switch from the first initial downlink bandwidth portion to the second initial downlink bandwidth portion, and switch from the first initial uplink bandwidth portion to the second initial uplink bandwidth portion.

Optionally, the terminal device may send the PRACH on the second initial uplink bandwidth portion over the RO resources, and the network device receives the PRACH on the second initial uplink bandwidth portion over the RO resources.

Optionally, the network device schedules an RAR in the RAR SS on the second initial downlink bandwidth portion, and the terminal device uses the RAR SS to monitor the RAR on the second initial downlink bandwidth portion.

Before the flow shown in fig. 3, the network device may configure the first downlink bandwidth part and the first uplink bandwidth part in addition to the first initial uplink BWP, the first initial downlink BWP, the second initial uplink BWP, and the second initial downlink BWP for the terminal device, and the specific configuration process is not limited. The first downlink bandwidth portion and the first uplink bandwidth portion may be user-specific bandwidth portions.

Fig. 3 is a schematic flow chart of a message transmission method according to an embodiment of the present application.

Alternatively, S301: the network device determines to send the first message, and correspondingly, the terminal device determines to receive the first message.

Wherein the first message may include at least one of:

S302: if the search space corresponding to the first message is not configured on the first downlink bandwidth part, and the search space is configured on the second downlink bandwidth part, the network device schedules the first message in the search space on the second downlink bandwidth part, and the terminal device monitors the first message on the second downlink bandwidth part by using the search space.

In one implementation, if the first downlink bandwidth part is an active bandwidth part, the terminal device switches from the first downlink bandwidth part to the second downlink bandwidth part, and the terminal device may also switch from the first uplink bandwidth part to the second uplink bandwidth part; accordingly, when the network device schedules the first message in the search space on the second downlink bandwidth part, the network device will also schedule the uplink message of the terminal device in the second uplink bandwidth part, and vice versa.

Alternatively, S303: when the search space is not configured on the second downlink bandwidth part, the network device schedules the first message in the search space on the third downlink bandwidth part, and the terminal device listens for the first message on the third downlink bandwidth part using the search space.

In one implementation, if the first downlink bandwidth part is an active bandwidth part, when the terminal device switches from the first downlink bandwidth part to the third downlink bandwidth part, the terminal device may further switch from the first uplink bandwidth part to the third uplink bandwidth part; accordingly, when the network device schedules the first message in the search space on the third downlink bandwidth part, the network device will also schedule the uplink message of the terminal device in the third uplink bandwidth part, and vice versa.

In the above flow, the downlink message is transmitted between the network device and the terminal device as an example, and when the uplink message (for example, the second message) is transmitted between the network device and the terminal device, the same method may be used, specifically:

and if the resource corresponding to the second message is not configured on the first uplink bandwidth part, when the resource is configured on the second uplink bandwidth part, the terminal equipment sends the second message on the second uplink bandwidth part through the resource, and the network equipment receives the second message on the second uplink bandwidth part through the resource. The second message may be a PRACH or a random access preamble, and the resource corresponding to the second message may be an RO resource. If the first uplink bandwidth part is the active bandwidth part, the terminal device may switch from the first uplink bandwidth part to the second uplink bandwidth part before sending the second message.

Optionally, if no resource corresponding to the second message is configured on the second uplink bandwidth part, the terminal device sends the second message on the third uplink bandwidth part through the resource, and the network device receives the second message on the third uplink bandwidth part through the resource. If the first uplink bandwidth part is the activated bandwidth part, the terminal device may switch from the first uplink bandwidth part to the third uplink bandwidth part before sending the second message.

It should be noted that, if the search space corresponding to the first message is configured on the first downlink bandwidth part, the network device may also schedule the first message in the search space on the first downlink bandwidth part, and the terminal device may also listen to the first message on the first downlink bandwidth part using the search space. If the resource corresponding to the second message is configured on the first uplink bandwidth portion, the terminal device may also send the second message on the first uplink bandwidth portion through the resource, and the network device may also receive the second message on the first uplink bandwidth portion through the resource.

Wherein the first downlink bandwidth portion is associated with the first uplink bandwidth portion. The search space corresponding to the first message may be optionally configured on the first downlink bandwidth portion, that is, the search space corresponding to the first message may be supported on the first downlink bandwidth portion, and the search space corresponding to the first message may also be supported without being configured.

In this embodiment, a search space corresponding to the first message is configured on the third downlink bandwidth portion, and a resource corresponding to the second message is configured on the third uplink bandwidth portion. The third downlink bandwidth part may refer to a second initial downlink bandwidth part configured for the terminal device by the network device. For example, the third downlink bandwidth portion is a downlink bandwidth portion determined according to the control resource set 0; alternatively, the third downlink bandwidth portion is configured by the system information block 1. The third downlink bandwidth part may be associated with a third uplink bandwidth part, and the third uplink bandwidth part may be a second initial uplink bandwidth part configured by the network device for the terminal device. The third downlink bandwidth part and the third uplink bandwidth part may have the same bandwidth part identification and have the same center frequency point. The configuration of the third uplink bandwidth part may be the same as that of the third downlink bandwidth part, and is not described herein again. For specific meanings of the second initial downlink bandwidth part and the second initial uplink bandwidth part, reference may be made to the foregoing description, and details are not described herein again.

In this embodiment of the present application, the second downlink bandwidth part may also be associated with the second uplink bandwidth part, and the second downlink bandwidth part and the second uplink bandwidth part may have the same bandwidth part identifier and the same center frequency point. In a first implementation manner, the second downlink bandwidth part is a first initial downlink bandwidth part configured by the network device for the terminal device, and the second uplink bandwidth part is a first initial uplink bandwidth part configured by the network device for the terminal device. For specific meanings of the first initial downlink bandwidth part and the first initial uplink bandwidth part, reference may be made to the foregoing description, and details are not described herein again.

In this implementation, the second downlink bandwidth part optionally configures a search space corresponding to the first message, that is, the second downlink bandwidth part may support not configuring the search space, and may also support configuring the search space.

The second uplink bandwidth part optionally configures resources corresponding to the second message, that is, the second uplink bandwidth part may support not configuring resources corresponding to the second message, and may also support configuring resources corresponding to the second message.

In a second implementation manner, the second downlink bandwidth part is a second initial downlink bandwidth part configured by the network device for the terminal device, and the second uplink bandwidth part is a second initial uplink bandwidth part configured by the network device for the terminal device.

In this implementation, the second downlink bandwidth portion is configured with a search space corresponding to the first message, and the second uplink bandwidth portion is configured with a resource corresponding to the second message.

In a third implementation, the second downlink bandwidth part is different from both the first initial downlink bandwidth part and the second initial downlink bandwidth part, and the second downlink bandwidth part may be configured by the network device through SIB1 or user-specific RRC signaling, or may be predefined or determined by pre-configuration through another method. Likewise, the second uplink bandwidth portion may be configured by the network device through SIB1 or user-specific RRC signaling, or may be determined by predefined or preconfigured by other methods.

In this implementation, the second downlink bandwidth part optionally configures a search space corresponding to the first message, and the second uplink bandwidth part optionally configures a resource corresponding to the second message.

In this implementation, the second downlink bandwidth part and the second uplink bandwidth part may be configured by the network device for the terminal device in the RRC connected state, that is, the second downlink bandwidth part and the second uplink bandwidth part are only valid when the terminal device is in the RRC connected state.

In conjunction with the foregoing description, the foregoing process is described below by way of one specific embodiment.

Assuming that the network device optionally configures one or more of a paging SS and a RAR SS on a first downlink bandwidth portion configured for the terminal device, the RO resource is optionally configured on the first uplink bandwidth portion.

The network equipment optionally configures one or more SSs of SIB1 SS, OSI SS, paging SS, RAR SS on a first initial downlink bandwidth part configured for the terminal equipment, and optionally configures RO resources on the first initial uplink bandwidth part.

The network device configures SIB1 SS, OSI SS, paging SS, RAR SS on a second initial downlink bandwidth portion configured for the terminal device, and configures RO resources on the second initial uplink bandwidth portion.

Wherein, the RAR SS and RO resources may be configured in pairs.

In one implementation, for at least one of the RAR and the random access preamble, the transmission procedure may be as follows:

assuming that the first downstream bandwidth part and the first upstream bandwidth part are active bandwidth parts, if the RAR SS is not configured on the first downstream bandwidth part and/or the RO resources are not configured on the first upstream bandwidth part, if the RAR SS is configured on the second downstream bandwidth part and the RO resources are configured on the second upstream bandwidth part, the following operations are performed:

and the terminal equipment is switched to the second uplink bandwidth part, and the terminal equipment is switched to the second downlink bandwidth part.

Optionally, the terminal device may send the PRACH on the second uplink bandwidth portion over the RO resources, and the network device may receive the PRACH on the second uplink bandwidth portion over the RO resources;

optionally, the network device schedules the RAR in the RAR SS on the second downlink bandwidth portion, and the terminal device listens to the RAR using the RAR SS on the second downlink bandwidth portion.

If the RAR SS is not configured on the second downlink bandwidth part and/or the RO resource is not configured on the second uplink bandwidth part, the following operations are performed:

and the terminal equipment is switched to the third uplink bandwidth part, and the terminal equipment is switched to the third downlink bandwidth part.

The method can be respectively applied to TDD and FDD scenes, for example, when the method is applied to TDD scenes, uplink BWP and downlink BWP of the terminal equipment are synchronously switched, and the center frequency bands are aligned, so that the time delay of the terminal equipment for processing uplink and downlink services can be shorter, the data transmission efficiency is improved, and the energy consumption is saved.

Optionally, the terminal device may send PRACH on a third uplink bandwidth portion over the RO resources, the network device receiving PRACH on the third uplink bandwidth portion over the RO resources;

optionally, the network device schedules an RAR in the RAR SS on the third downlink bandwidth portion, and the terminal device uses the RAR SS to monitor the RAR on the third downlink bandwidth portion.

In one implementation, for paging, the transmission process may be as follows:

assuming that the first downstream bandwidth part and the first upstream bandwidth part are active bandwidth parts, if no paging SS is configured on the first downstream bandwidth part, then if a paging SS is configured on the second downstream bandwidth part, the following is performed:

Optionally, the network device schedules the paging in the paging SS on the second downlink bandwidth segment, and the terminal device listens to the paging using the paging SS on the second downlink bandwidth segment.

If no paging SS is configured on the second downlink bandwidth part, the following operations are performed:

Optionally, the network device schedules the paging in the paging SS on the third downlink bandwidth portion, and the terminal device listens to the paging using the paging SS on the third downlink bandwidth portion.

In one implementation, for a paging, if the paging is used to instruct the terminal device to receive updated system information or service data, if no paging SS is configured on the first downlink bandwidth part, the network device may send the updated system information or service data to the terminal device through RRC signaling specific to the terminal device, and no longer send the paging. For the above two embodiments, the network may indicate which mode is used by signaling, for example, system Information Block (SIB), RRC signaling, medium Access Control (MAC) Control Element (CE), downlink Control Information (DCI), and the like.

In addition, in one implementation manner, if the search space corresponding to the first message is not configured on the first downlink bandwidth part, the terminal device and the network device preferentially use the downlink bandwidth part configured with the search space corresponding to the first message; the terminal device and the network device preferentially use the part of the downlink bandwidth configured with the search space corresponding to the first message.

For example, if the search space corresponding to the first message is not configured on the second downlink bandwidth part, and the search space corresponding to the first message is configured on the third downlink bandwidth part, the terminal device and the network device preferentially use the third downlink bandwidth part, and vice versa.

In addition, in this embodiment of the present application, if the third downlink bandwidth part is included in the bandwidth part set supported by the terminal device, the terminal device supports and configures N-1 bandwidth parts except for the third downlink bandwidth part;

or, if the third downlink bandwidth part is not included in the bandwidth part set supported by the terminal device, the terminal device supports and configures N bandwidth parts except the third downlink bandwidth part;

wherein, N is the number of bandwidth parts in the bandwidth part set supported by the terminal device, and N is an integer greater than 0.

The above-described embodiments may be implemented individually or in combination with each other. In the above, in different embodiments, the differences of the respective embodiments are described with emphasis, and other contents among the different embodiments can be referred to each other except the differences. It should be understood that not all the steps illustrated in the respective flowcharts are necessarily performed, and some steps may be added or deleted on the basis of the respective flowcharts according to actual needs.

In order to implement the functions in the method provided by the embodiments of the present application, the network device, the terminal device, or the communication apparatus 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 functions is implemented as a hardware structure, a software module, or a combination of a hardware structure and a software module depends upon the particular application and design constraints imposed on the technical solution.

The division of the modules in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation. In addition, functional modules in the embodiments of the present application may be integrated into one processor, may exist alone physically, or may be integrated into one module by two or more modules. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

Similar to the above concept, as shown in fig. 4, the embodiment of the present application further provides a communication apparatus 400. The communication apparatus 400 may be the terminal device in fig. 1, and is configured to implement the method for the terminal device in the foregoing method embodiment. The communication device may also be the network device in fig. 1, and is configured to implement the method corresponding to the network device in the foregoing method embodiment. The specific functions can be seen from the description of the above method embodiments.

Specifically, the communication apparatus 400 may include: a processing unit 401 and a communication unit 402. In this embodiment of the present application, the communication unit may also be referred to as a transceiver unit, and may include a transmitting unit and/or a receiving unit, which are respectively configured to perform the steps of transmitting and receiving by the network device or the terminal device in the foregoing method embodiments. Hereinafter, the communication device according to the embodiment of the present application will be described in detail with reference to fig. 4 to 5.

In some possible implementations, the behavior and functions of the terminal device in the above method embodiment may be implemented by the communication apparatus 400, for example, implementing the method performed by the terminal device in the embodiment of fig. 2 or 3. For example, the communication apparatus 400 may be a terminal device, a component (e.g., a chip or a circuit) applied in the terminal device, or a chip set in the terminal device or a part of the chip for performing the related method function. The communication unit 402 may be configured to perform receiving or transmitting operations performed by the terminal device in the embodiment shown in fig. 2 or 3, and the processing unit 401 may be configured to perform operations other than transceiving operations performed by the terminal device in the embodiment shown in fig. 2 or 3.

In a first implementation manner, the communication unit is configured to monitor the first message on the second downlink bandwidth part using the search space if the search space corresponding to the first message is not configured on the first downlink bandwidth part and the search space is configured on the second downlink bandwidth part; the first message is a paging message or a random access response message.

In a possible implementation manner, the processing unit is configured to determine to receive a first message;

a communication unit, configured to listen to the first message using the search space on a third downlink bandwidth part when the search space is not configured on the second downlink bandwidth part; wherein the third downlink bandwidth part is a downlink bandwidth part determined according to the control resource set 0; alternatively, the third downlink bandwidth part is configured by the system information block 1.

In a possible implementation manner, the second downlink bandwidth part is configured by the network device for the terminal device in the rrc connection state.

In a possible implementation, if the first downlink bandwidth portion is an active bandwidth portion, the processing unit is configured to: the first downstream bandwidth portion is switched to the second upstream bandwidth portion when the first downstream bandwidth portion is switched to the second downstream bandwidth portion. The first upstream bandwidth portion is associated with a first downstream bandwidth portion and the second upstream bandwidth portion is associated with a second downstream bandwidth portion.

In a possible implementation, if the first downlink bandwidth portion is an active bandwidth portion, the processing unit is configured to: switching from the first upstream bandwidth portion to the third upstream bandwidth portion when switching from the first downstream bandwidth portion to the third upstream bandwidth portion; wherein the first upstream bandwidth portion is associated with the first downstream bandwidth portion and the third upstream bandwidth portion is associated with the third downstream bandwidth portion.

In a possible implementation manner, if the first message is a random access response message, and if the first uplink bandwidth part is switched to the second uplink bandwidth part, the communication unit is further configured to: and transmitting the physical random access channel by using the physical random access channel opportunity resource in the second uplink bandwidth part.

In a possible implementation manner, if the first message is a random access response message, and if the first uplink bandwidth portion is switched to the third uplink bandwidth portion, the communication unit is further configured to: and transmitting the physical random access channel by using the physical random access channel opportunity resource in the third uplink bandwidth part.

In a second implementation manner, the communication unit is configured to send the second message on the second uplink bandwidth part using the resource if the resource corresponding to the second message is not configured on the first uplink bandwidth part and the resource is configured on the second uplink bandwidth part.

In a possible implementation manner, the communication unit is configured to send the second message by using the resource on the third uplink bandwidth part when the resource is not configured on the second uplink bandwidth part; wherein the third uplink bandwidth part is an uplink bandwidth part determined according to the control resource set 0; alternatively, the third uplink bandwidth part is configured by the system information block 1.

In one possible implementation, the second uplink bandwidth portion supports unconfigured resources.

In one possible implementation, the second uplink bandwidth part is a first initial uplink bandwidth part, and the first initial uplink bandwidth part is an initial uplink bandwidth part configured for the first type terminal device separately.

In one possible implementation, the first initial uplink bandwidth portion is determined according to a first initial downlink bandwidth portion, and the first initial downlink bandwidth portion is configured for the network device.

In a possible implementation manner, the second uplink bandwidth part is configured by the network device for the terminal device in the rrc connection state.

In a possible implementation manner, if the first uplink bandwidth part is an active bandwidth part, the processing unit is configured to: when switching from the first upstream bandwidth portion to the second upstream bandwidth portion, switching from the first upstream bandwidth portion to the second upstream bandwidth portion. The first downstream bandwidth portion is associated with a first upstream bandwidth portion and the second downstream bandwidth portion is associated with a second upstream bandwidth portion.

In a possible implementation manner, if the first uplink bandwidth part is an active bandwidth part, the processing unit is configured to: switching from the first upstream bandwidth portion to the third upstream bandwidth portion when switching from the first upstream bandwidth portion to the third upstream bandwidth portion; wherein the first upstream bandwidth portion is associated with the first downstream bandwidth portion and the third upstream bandwidth portion is associated with the third downstream bandwidth portion.

In a possible implementation manner, the second message is a random access preamble or a physical random access channel.

In a third implementation manner, the communication unit is configured to monitor the first message using a search space on the second initial downlink bandwidth part if the search space corresponding to the first message is not configured on the first initial downlink bandwidth part;

wherein the second initial downlink bandwidth part is a downlink bandwidth part determined according to the control resource set 0; alternatively, the second initial downlink bandwidth portion is configured by the system information block 1.

In one possible implementation, the first initial downlink bandwidth portion supports no configuration of the search space.

In one possible implementation manner, the first initial downlink bandwidth part is an initial downlink bandwidth part configured for the first type terminal device separately.

In a possible implementation manner, the first initial downlink bandwidth part is an active bandwidth part, and the processing unit is further configured to:

switching from the first initial upstream bandwidth portion to the second initial upstream bandwidth portion when switching from the first initial downstream bandwidth portion to the second initial downstream bandwidth portion;

wherein the first initial upstream bandwidth portion is associated with a first initial downstream bandwidth portion and the second initial upstream bandwidth portion is associated with a second initial downstream bandwidth portion.

In a possible implementation manner, if the first message is a random access response message, the communication unit is further configured to:

and transmitting the physical random access channel in the physical random access channel opportunity resource of the first initial uplink bandwidth part.

In a fourth implementation manner, the communication unit is configured to send the second message on the second initial uplink bandwidth part using the resource corresponding to the second message if the resource corresponding to the second message is not configured on the first initial uplink bandwidth part;

wherein the second initial uplink bandwidth portion is determined according to control resource set 0; alternatively, the second initial uplink bandwidth portion is configured by the system information block 1.

In some possible implementations, the behavior and functions of the network device in the above method embodiments may be implemented by the communication apparatus 400, for example, implementing the method performed by the network device in the embodiments of fig. 2 or 3. For example, the communication apparatus 400 may be a network device, a component (e.g., a chip or a circuit) applied in the network device, or a chip set in a terminal device, or a part of the chip for performing a function of the related method. The communication unit 402 may be configured to perform receiving or transmitting operations performed by the network device in the embodiments shown in fig. 2 or 3, and the processing unit 401 may be configured to perform operations other than transceiving operations performed by the network device in the embodiments shown in fig. 2 or 3.

In a first implementation manner, a processing unit is configured to determine to send a first message; and the communication unit is used for scheduling the first message in the search space on the second downlink bandwidth part if the search space corresponding to the first message is not configured on the first downlink bandwidth part and the search space is configured on the second downlink bandwidth part.

In one possible implementation, when no search space is configured on the second downlink bandwidth portion, scheduling the first message in a search space on the third downlink bandwidth portion; the first message is a paging message or a random access response message; the third downlink bandwidth part is a downlink bandwidth part determined according to the control resource set 0; alternatively, the third downlink bandwidth part is configured by the system information block 1.

In one possible implementation, the second downlink bandwidth portion is configured for a terminal device in a radio resource control connected state.

In a second implementation manner, the communication unit is configured to receive, if a resource corresponding to the second message is not configured on the first uplink bandwidth portion, the second message through the resource on the second uplink bandwidth portion when the resource is configured on the second uplink bandwidth portion; receiving a second message over the resource on a third uplink bandwidth portion when the resource is not configured on the second uplink bandwidth portion; wherein the third uplink bandwidth part is an uplink bandwidth part determined according to the control resource set 0; alternatively, the third uplink bandwidth portion is configured by the system information block 1.

In one possible implementation, the second uplink bandwidth portion is configured by the network device for the terminal device in the rrc connected state.

In a third implementation manner, the communication unit is configured to schedule the first message in a search space on the second initial downlink bandwidth part if the search space corresponding to the first message is not configured on the first initial downlink bandwidth part; wherein the second initial downlink bandwidth part is a downlink bandwidth part determined according to the control resource set 0; alternatively, the second initial downlink bandwidth portion is configured by the system information block 1.

In a fourth implementation manner, the communication unit is configured to receive, if a resource corresponding to the second message is not configured on the first initial uplink bandwidth portion, the second message through the resource corresponding to the second message on the second initial uplink bandwidth portion; wherein the second initial uplink bandwidth portion is determined according to the control resource set 0; alternatively, the second initial uplink bandwidth portion is configured by the system information block 1.

It should be understood that the description of the apparatus embodiment and the description of the method embodiment correspond to each other, and the apparatus structure for implementing the terminal device and the network device as in fig. 2 or 3 may also refer to the communication apparatus 400, so that the content that is not described in detail may refer to the above method embodiment, and is not described here again for brevity.

The communication unit may also be referred to as a transceiver, transceiving means, etc. A processing unit may also be referred to as a processor, a processing board, a processing module, a processing device, or the like. Alternatively, a device in the communication unit 402 for implementing the receiving function may be regarded as a receiving unit, and a device in the communication unit 402 for implementing the sending function may be regarded as a sending unit, that is, the communication unit 402 includes a receiving unit and a sending unit. A communication unit may also sometimes be referred to as a transceiver, transceiver circuit, or the like. A receiving unit may also be referred to as a receiver, a receiving circuit, or the like. A transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc.

The above are merely examples, and the processing unit 401 and the communication unit 402 may also perform other functions, and for a more detailed description, reference may be made to the related description in the method embodiment shown in fig. 2 or 3, which is not described herein again.

As shown in fig. 5, which is a communication apparatus 500 provided in the embodiment of the present application, the apparatus shown in fig. 5 may be implemented as a hardware circuit of the apparatus shown in fig. 4. The communication device can be applied to the flow chart shown in the foregoing, and performs the functions of the terminal device or the network device in the above method embodiment. For ease of illustration, fig. 5 shows only the main components of the communication device.

As shown in fig. 5, the communication device 500 includes a processor 510 and an interface circuit 520. Processor 510 and interface circuit 520 are coupled to each other. It is understood that the interface circuit 520 may be a transceiver or an input-output interface. Optionally, the communication device 500 may further include a memory 530 for storing instructions executed by the processor 510 or for storing input data required by the processor 510 to execute the instructions or for storing data generated by the processor 510 after executing the instructions.

When the communication device 500 is used to implement the method shown in fig. 2 or 3, the processor 510 is used to implement the functions of the processing unit 401 and the interface circuit 520 is used to implement the functions of the communication unit 402.

When the communication device is a chip applied to a terminal device, the terminal device chip implements the functions of the terminal device in the method embodiment. The terminal device chip receives information from other modules (such as a radio frequency module or an antenna) in the terminal device, wherein the information is sent to the terminal device by the network device; or, the terminal device chip sends information to other modules (such as a radio frequency module or an antenna) in the terminal device, where the information is sent by the terminal device to the network device.

When the communication device is a chip applied to a network device, the network device chip implements the functions of the network device in the above method embodiments. The network device chip receives information from other modules (such as a radio frequency module or an antenna) in the network device, wherein the information is sent to the network device by the terminal device; alternatively, the network device chip sends information to other modules (such as a radio frequency module or an antenna) in the network device, and the information is sent by the network device to the terminal device.

It is understood that the Processor in the embodiments of the present Application may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), other Programmable logic device, or a transistor logic device. The general purpose processor may be a microprocessor, but may be any conventional processor.

In embodiments of the present application, the Memory may be a Random Access Memory (RAM), a flash Memory, a Read-Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), a register, a hard disk, a removable hard disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in a network device or a terminal device. The processor and the storage medium may reside as discrete components in a network device or a terminal device.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the scope of the 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 message transmission method is applied to terminal equipment and comprises the following steps:

determining to receive a first message, wherein the first message is a paging message or a random access response message;

if the search space corresponding to the first message is not configured on a first downlink bandwidth part, and the search space is configured on a second downlink bandwidth part, monitoring the first message by using the search space on the second downlink bandwidth part;

listening for the first message using the search space on a third downlink bandwidth portion when the search space is not configured on the second downlink bandwidth portion;

wherein the third downlink bandwidth part is a downlink bandwidth part determined according to a control resource set 0; alternatively, the third downlink bandwidth part is configured by a system information block 1.

2. The method of claim 1, wherein the second downlink bandwidth portion supports not configuring the search space.

3. The method of claim 1, wherein the second downlink bandwidth portion is a first initial downlink bandwidth portion, and wherein the first initial downlink bandwidth portion is an initial downlink bandwidth portion configured for the first type of terminal device separately.

4. The method of claim 3, wherein the first initial downstream bandwidth portion is determined based on a first initial upstream bandwidth portion, and wherein the first initial upstream bandwidth portion is configured for a network device.

5. The method according to claim 1 or 2, wherein the second downlink bandwidth portion is configured by the network device for the terminal device in the radio resource control connected state.

6. The method according to any of claims 1 to 5, wherein if the first downlink bandwidth portion is an active bandwidth portion, the method further comprises:

switching from a first upstream bandwidth portion to a second upstream bandwidth portion when switching from the first downstream bandwidth portion to the second downstream bandwidth portion;

or, when switching from the first downstream bandwidth portion to the third upstream bandwidth portion, switching from the first upstream bandwidth portion to a third upstream bandwidth portion;

wherein the first upstream bandwidth portion is associated with the first downstream bandwidth portion, the second upstream bandwidth portion is associated with the second downstream bandwidth portion, and the third upstream bandwidth portion is associated with the third downstream bandwidth portion.

7. The method of claim 6, wherein if the first message is the random access response message, if the first uplink bandwidth portion is switched to a second uplink bandwidth portion, the method further comprises:

and sending the physical random access channel by using the physical random access channel opportunity resource in the second uplink bandwidth part.

8. The method of claim 6, wherein if the first message is the random access response message, if the first uplink bandwidth portion is switched to a third uplink bandwidth portion, the method further comprises:

and sending the physical random access channel by using the physical random access channel opportunity resource in the third uplink bandwidth part.

9. A message transmission method is applied to network equipment and comprises the following steps:

determining to send a first message, wherein the first message is a paging message or a random access response message;

if the search space corresponding to the first message is not configured on a first downlink bandwidth part, and the search space is configured on a second downlink bandwidth part, scheduling the first message in the search space on the second downlink bandwidth part;

scheduling the first message in the search space on the third downlink bandwidth part when the search space is not configured on the second downlink bandwidth part;

wherein the third downlink bandwidth part is a downlink bandwidth part determined according to a control resource set 0; alternatively, the third downlink bandwidth portion is configured by a system information block 1.

10. The method of claim 9, wherein the second downlink bandwidth portion supports not configuring the search space.

11. The method of claim 9, wherein the second downlink bandwidth portion is a first initial downlink bandwidth portion, and wherein the first initial downlink bandwidth portion is an initial downlink bandwidth portion configured for the first type of terminal device separately.

12. The method of claim 11, wherein the first initial downlink bandwidth portion is determined based on a first initial uplink bandwidth portion configured for the network device.

13. The method according to claim 9 or 10, wherein the second downlink bandwidth portion is configured by the network device for the terminal device in the rrc connected state.

14. The method of any of claims 9 to 13, further comprising:

scheduling an uplink message of a terminal device in a second uplink bandwidth part when scheduling the first message in the search space on the second downlink bandwidth part;

or when the first message is scheduled in the search space on the third downlink bandwidth part, scheduling the uplink message of the terminal equipment in the third uplink bandwidth part;

15. A message transmission method is applied to a terminal device and comprises the following steps:

if the resource corresponding to the second message is not configured on the first uplink bandwidth part, when the resource is configured on the second uplink bandwidth part, the resource is used for sending the second message on the second uplink bandwidth part;

transmitting the second message using the resource on a third portion of uplink bandwidth when the resource is not configured on the second portion of uplink bandwidth;

wherein the third uplink bandwidth portion is an uplink bandwidth portion determined according to control resource set 0; alternatively, the third uplink bandwidth part is configured by a system information block 1.

16. A message transmission method is applied to network equipment and comprises the following steps:

if the resource corresponding to the second message is not configured on the first uplink bandwidth part, when the resource is configured on the second uplink bandwidth part, receiving the second message through the resource on the second uplink bandwidth part;

receiving the second message over the resource on a third uplink bandwidth portion when the resource is not configured on the second uplink bandwidth portion;

17. A message transmission method is applied to a terminal device and comprises the following steps:

if the search space corresponding to the first message is not configured on the first initial downlink bandwidth part, monitoring the first message on the second initial downlink bandwidth part by using the search space;

wherein the second initial downlink bandwidth part is a downlink bandwidth part determined according to a control resource set 0; alternatively, the second initial downlink bandwidth part is configured by a system information block 1.

18. The method of claim 17, wherein said first initial downlink bandwidth portion supports unconfiguring said search space.

19. The method of claim 17, wherein the first initial downlink bandwidth portion is an initial downlink bandwidth portion configured for the first type terminal device separately.

20. The method of claim 17 or 19, wherein the first initial downlink bandwidth portion is determined based on a first initial uplink bandwidth portion, and wherein the first initial uplink bandwidth portion is configured for a network device.

21. The method according to any of claims 17 to 20, wherein the first initial downlink bandwidth portion is an active bandwidth portion, the method further comprising:

switching from a first initial upstream bandwidth portion to a second initial upstream bandwidth portion when switching from the first initial downstream bandwidth portion to the second initial downstream bandwidth portion;

wherein the first initial upstream bandwidth portion is associated with the first initial downstream bandwidth portion and the second initial upstream bandwidth portion is associated with the second initial downstream bandwidth portion.

22. The method of claim 21, wherein if the first message is a random access response message, the method further comprises:

and sending a physical random access channel in the physical random access channel opportunity resource of the first initial uplink bandwidth part.

23. A message transmission method is applied to network equipment and comprises the following steps:

determining to send a first message;

if the search space corresponding to the first message is not configured on the first initial downlink bandwidth part, scheduling the first message in the search space on the second initial downlink bandwidth part;

wherein the second initial downlink bandwidth portion is a downlink bandwidth portion determined according to a control resource set 0; alternatively, the second initial downlink bandwidth portion is configured by a system information block 1.

24. A communication device comprising a processor, interface circuitry, and a memory;

the processor configured to execute the computer program or instructions stored in the memory to cause the communication device to implement the method of any one of claims 1 to 8 or 15 or 17 to 22.

25. A communication device comprising a processor and a memory;

the processor configured to execute the computer program or instructions stored in the memory to cause the communication device to implement the method of any one of claims 9 to 14 or 16 or 23.

26. A communication device comprising a processor and a memory;

27. A communication device comprising a processor and a memory;

28. A computer-readable storage medium, in which a computer program or instructions are stored which, when run on a computer, cause the computer to carry out the method of any one of claims 1 to 8 or 15 or 17 to 22 or cause the computer to carry out the method of any one of claims 9 to 14 or 16 or 23.