WO2021237560A1

WO2021237560A1 - Data transmission methods and apparatus, terminal and network device, and storage medium

Info

Publication number: WO2021237560A1
Application number: PCT/CN2020/092865
Authority: WO
Inventors: 付喆; 石聪
Original assignee: Oppo广东移动通信有限公司
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2021-12-02
Also published as: CN115336351A

Abstract

The present application relates to data transmission methods and apparatus, a terminal and a network device, and a storage medium. A data transmission method comprises: a terminal monitors physical downlink control channel (PDCCH) transmission on the basis of configuration information issued by a network device, the PDCCH transmission comprising downlink control information (DCI) sent by the network device, the configuration information comprising multiple frequency bands configured by the network device for the terminal to send downlink information, and PDCCH search spaces corresponding to the multiple frequency bands; and then, according to the DCI and the multiple frequency bands, the terminal acquires the downlink information sent by the network device. Using the foregoing method can improve the timeliness and reliability of downlink information transmission.

Description

Data transmission method, device, terminal, network equipment and storage medium

Technical field

This application relates to the field of communication technology, and in particular to a data transmission method, device, terminal, network device, and storage medium.

Background technique

With the development of communication technology, the fifth generation (5th generation mobile networks, referred to as 5G) new radio access system (New Radio Access Network, referred to as NR system) can work in unlicensed frequency bands. On unlicensed frequency bands, multiple communication systems, such as NR systems and WiFi systems, may be deployed at the same time.

In order to ensure fair coexistence between communication systems deployed on unlicensed frequency bands, NR systems generally adopt a listen before talk (LBT) mechanism to detect unlicensed frequency bands. In other words, the sender (base station or terminal) needs to listen for a period of time as required before sending data on the unlicensed frequency band; if the result of the listening indicates that the current channel is idle, the sender can send data to the receiver ; If the listening result indicates that the current channel is in an occupied state, the sender needs to back off for a period of time according to the regulations before continuing to listen to the channel until the channel listening result is idle before sending data to the receiving end.

Summary of the invention

The embodiments of the present application provide a data transmission method, device, terminal, network device, and storage medium, which can be used for data transmission deployed on an unlicensed frequency band.

In the first aspect, a data transmission method includes:

Based on the configuration information issued by the network device, monitor the physical downlink control channel PDCCH transmission; the PDCCH transmission includes the downlink control information DCI sent by the network device; the configuration information includes the multiple frequency bands configured by the network device for the terminal to send downlink information, and multiple Physical downlink control channel PDCCH search space corresponding to each frequency band;

According to DCI and multiple frequency bands, obtain the downlink information sent by the network device.

In the second aspect, a data transmission method includes:

Acquiring configuration information, where the configuration information includes multiple frequency bands configured by the network device for the terminal to send downlink information, and the physical downlink control channel PDCCH search space corresponding to the multiple frequency bands;

Based on multiple frequency bands and PDCCH search space, downlink control information DCI and downlink information sent to the terminal.

In the third aspect, a data transmission device includes a monitoring module and an acquisition module:

The monitoring module is used to monitor the physical downlink control channel PDCCH transmission based on the configuration information issued by the network device; the PDCCH transmission includes the downlink control information DCI sent by the network device; the configuration information includes the network device configured for the terminal to send downlink information. One frequency band, and the physical downlink control channel PDCCH search space corresponding to multiple frequency bands;

The obtaining module is used to obtain the downlink information sent by the network device according to the DCI and multiple frequency bands.

In a fourth aspect, a data transmission device includes an acquisition module and a sending module:

The obtaining module is used to obtain configuration information, the configuration information includes multiple frequency bands configured for the terminal by the network device for sending downlink information, and the physical downlink control channel PDCCH search space corresponding to the multiple frequency bands;

The sending module is used to send downlink control information DCI and downlink information to the terminal based on multiple frequency bands and PDCCH search spaces.

In the fifth aspect, a terminal includes a receiver and a transmitter:

The receiver cooperates with the processor to monitor the physical downlink control channel PDCCH transmission based on the configuration information issued by the network device; the PDCCH transmission includes the downlink control information DCI sent by the network device; the configuration information includes the configuration information for the terminal configured by the network device Multiple frequency bands for sending downlink information, and the physical downlink control channel PDCCH search space corresponding to the multiple frequency bands; according to the DCI and the multiple frequency bands, the downlink information sent by the network device is obtained.

In the sixth aspect, a network device includes a transmitter and a receiver:

The transmitter cooperates with the processor to obtain configuration information. The configuration information includes multiple frequency bands configured by the network device for the terminal to transmit downlink information, and the physical downlink control channel PDCCH search space corresponding to the multiple frequency bands; Frequency band and PDCCH search space, downlink control information DCI and downlink information sent to the terminal.

In a seventh aspect, a computer-readable storage medium has a computer program stored thereon, and when the computer program is executed by a processor, the following steps are implemented:

Based on the configuration information issued by the network device, monitor the physical downlink control channel PDCCH transmission; the PDCCH transmission includes the downlink control information DCI sent by the network device; the configuration information includes multiple frequency bands configured by the network for the terminal to send downlink information, and multiple The physical downlink control channel PDCCH search space corresponding to the frequency band;

In an eighth aspect, a computer-readable storage medium has a computer program stored thereon, and when the computer program is executed by a processor, the following steps are implemented:

The above-mentioned data transmission method, device, terminal, network device and storage medium, the terminal monitors PDCCH transmission based on the configuration information issued by the network device; wherein the PDCCH transmission includes the DCI sent by the network device; the terminal based on the network device included in the configuration information is The multiple frequency bands configured by the terminal for sending downlink information and the PDCCH search space corresponding to the multiple frequency bands obtain the downlink information sent by the network device. In this application, since the network equipment configures multiple frequency bands for the terminal, one of the frequency bands can be selected to send downlink information. There is no need to concentrate on one frequency band to perform LBT, and there is no need to continue to wait on this frequency band when LBT fails to be performed on this frequency band. , But can jump to another frequency band detected by LBT to send downlink information, which improves the timeliness of downlink information delivery, so that the terminal does not need to wait on a frequency band all the time, greatly improving the timeliness of downlink information transmission And reliability.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

FIG. 1 is an application environment diagram of a data transmission method provided by an embodiment;

FIG. 2 is a schematic flowchart of a data transmission method provided by an embodiment;

FIG. 3 is a schematic flowchart of a data transmission method provided by another embodiment;

4 is a schematic flowchart of a data transmission method provided by another embodiment;

FIG. 5 is a schematic flowchart of a data transmission method provided by another embodiment;

FIG. 6 is a schematic flowchart of a data transmission method provided by another embodiment;

FIG. 7 is a schematic flowchart of a data transmission method provided by another embodiment;

Figure 8 is a block diagram of a data transmission device provided by an embodiment;

FIG. 9 is a block diagram of a data transmission device provided by another embodiment;

FIG. 10 is a block diagram of a data transmission device provided by another embodiment;

FIG. 11 is a block diagram of a data transmission device provided by another embodiment;

FIG. 12 is a block diagram of a data transmission device provided by another embodiment;

FIG. 13 is a block diagram of a data transmission device provided by another embodiment;

FIG. 14 is a block diagram of a data transmission device provided by another embodiment;

FIG. 15 is a schematic diagram of the internal structure of a terminal provided by an embodiment;

FIG. 16 is a schematic diagram of the internal structure of a network device provided by an embodiment.

Detailed ways

In order to make the purpose, technical solutions, and advantages of this application clearer, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the present application.

At present, the 5G NR system can work in an unlicensed frequency band. For example, in a dual-connection scenario, the primary cell can be a Long Term Evolution (LTE) licensed frequency band, and the secondary cell can work in an NR unlicensed frequency band. Generally speaking, the unlicensed frequency band of the NR system can be a frequency band near 5 GHz or 6 GHz. On unlicensed frequency bands, multiple communication systems, such as NR systems and WiFi systems, may be deployed at the same time. The deployment of the NR system on the unlicensed frequency band should comply with the principle of fairness, that is, the influence of the NR system on the system (such as the WiFi system) that has been deployed on the unlicensed frequency band cannot exceed the influence between the systems.

In order to ensure fair coexistence between communication systems deployed on unlicensed frequency bands, NR systems generally use the LBT mechanism to detect unlicensed frequency bands. The basic principle of LBT detection is: before a base station or terminal (transmitting end) transmits data on an unlicensed spectrum, it needs to listen for a period of time in accordance with regulations. If the listening result indicates that the channel is idle, the transmitting end can transmit data to the receiving end. If the listening result indicates that the channel is in an occupied state, the transmitting end needs to back off for a period of time according to regulations before continuing to listen to the channel until the channel listening result is idle before transmitting data to the receiving end.

In the application scenario of the NR system, in the scenario of ultra-reliable and low-latency communications (URLLC), the data types transmitted by the network device to the terminal are mainly control commands, alarm information, etc. for reliability and transmission Data with high latency requirements. The NR system in the unlicensed frequency band cannot guarantee the timeliness and reliability of the data transmission during URLLC data transmission.

The data transmission method provided in the embodiments of the present application can be applied to the field of communication technology. FIG. 1 is a schematic diagram of an application scenario of a data transmission method provided by an embodiment of the application. As shown in FIG. 1, this scenario includes a network device 100 and a terminal 200, and the network device 100 and the terminal 200 communicate through a network. Among them, the network device 100 may be a base station (Base Transceiver Station, abbreviated as BTS) in Global System of Mobile Communications (GSM) or Code Division Multiple Access (Code Division Multiple Access, abbreviated as CDMA), or it may be broadband The base station (NodeB, NB) in Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA for short), can also be the Evolutional Node B (eNB or eNodeB for short) in LTE, or a relay station or an access point , Or the base station in the 5G network, etc., are not limited here.

The terminal 200 may be a wireless terminal. The wireless terminal may be a device that provides voice and/or other service data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. A wireless terminal can communicate with one or more core networks via a radio access network (Radio Access Network, referred to as RAN). The wireless terminal can be a mobile terminal, such as a mobile phone (or called a "cellular" phone) and a mobile phone with a mobile terminal. Computers, for example, can be portable, pocket-sized, handheld, computer-built or vehicle-mounted mobile devices, which exchange language and/or data with the wireless access network. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (Personal Digital Assistant, PDA for short) and other equipment.

It should be noted that the data transmission method of this application is not limited to solving the above technical problems, but can also be used to solve other technical problems, which is not limited in this application.

The technical solution of the present application will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

Fig. 2 is a flowchart of a data transmission method in an embodiment. The data transmission method in this embodiment is described by taking the terminal operating in FIG. 1 as an example. As shown in Figure 2, the above data transmission method includes the following steps:

S101. Based on the configuration information issued by the network device, monitor the physical downlink control channel PDCCH transmission; the PDCCH transmission includes the downlink control information DCI sent by the network device; the configuration information includes multiple frequency bands configured by the network device for the terminal to send downlink information , And the physical downlink control channel PDCCH search space corresponding to multiple frequency bands.

Wherein, the foregoing configuration information includes multiple frequency bands configured for the terminal by the network device for sending downlink information. Network equipment generally supports a larger working bandwidth, and multiple frequency bands within the working bandwidth can be configured for the terminal, for example, 4 frequency bands can be configured for the terminal. The terminal can activate only one of the frequency bands at the same time, and then switch to other frequency bands according to its own needs or the instructions of the network equipment. Optionally, the foregoing multiple frequency bands may be unlicensed frequency bands of the system.

The above configuration information also includes a physical downlink control channel (Physical Downlink Control Channel, PDCCH for short) search space corresponding to multiple frequency bands. The above-mentioned PDCCH search space may be a resource used to transmit the PDCCH, and the network device may transmit downlink control information (Downlink Control Information, DCI) to the terminal through the PDCCH search space. The above-mentioned DCI may include uplink and downlink resource allocation, HARQ information, power control, etc., and the terminal device may obtain the resource location where the downlink information is located according to the indication of the DCI. Among them, the PDCCH transmission may include DCI corresponding to one or more terminal devices. Before receiving the downlink information, the terminal device first monitors the PDCCH transmission, detects the DCI sent by the network device to the UE during the PDCCH transmission, and then demodulates the DCI to obtain the resource location of the downlink information belonging to the UE.

Specifically, the terminal device can obtain the configuration information sent by the network device when registering to the network, and can also obtain the configuration information sent by the network device when switching to an unlicensed frequency band work scenario, which is not limited here. The terminal device can obtain the configuration information through radio resource control (Radio Resource Control, RRC) signaling, or through media access control layer (media access control layer, MAC) signaling, which is not done here. limited.

After configuring multiple frequency bands for the terminal, the network device can perform LBT detection on the multiple frequency bands before sending downlink information to the terminal to determine which frequency band is in an idle state. After the LBT of the first frequency band fails, the network device can send downlink information in the second frequency band detected as idle by LBT, without having to go back for a period of time as required before continuing to perform LBT detection on the first frequency band, so that the terminal device can update Receive the downlink information in a timely manner.

Specifically, the terminal can monitor PDCCH transmission in the entire PDCCH search space configured by the network, or can monitor PDCCH transmission in different regions of the PDCCH search space, which is not limited here.

S102. Obtain downlink information sent by a network device according to the DCI and multiple frequency bands.

After the terminal monitors the PDCCH transmission, it can detect the DCI sent by the network device in the PDCCH transmission, and determine the resource location where the downlink information is located according to the multiple frequency bands configured by the network device, and receive the downlink information sent by the network device.

Specifically, the terminal can determine which frequency band of the multiple frequency bands the downlink information is in based on the detected DCI, and then receive the downlink information in this frequency band; or the terminal device can search for which frequency band in the multiple frequency bands according to the instructions of the DCI One frequency band has downlink information, and there is no limitation on the method of obtaining downlink information.

It should be noted that, among the above multiple frequency bands, one of the frequency bands may have downlink information, or two or more frequency bands may have downlink information at the same time, which is not limited here.

In the above data transmission method, the terminal monitors the PDCCH transmission based on the configuration information issued by the network device; wherein the PDCCH transmission includes the DCI sent by the network device; the terminal configures the terminal for sending downlink information based on the network device included in the configuration information. PDCCH search space corresponding to one frequency band and multiple frequency bands to obtain downlink information sent by network equipment. In this application, since the network equipment configures multiple frequency bands for the terminal, one of the frequency bands can be selected to send downlink information. There is no need to concentrate on one frequency band to perform LBT, and there is no need to continue to wait on this frequency band when LBT fails to be performed on this frequency band. , But can jump to another frequency band detected by LBT to send downlink information, which improves the timeliness of downlink information delivery, so that the terminal does not need to wait on a frequency band all the time, greatly improving the timeliness of downlink information transmission And reliability.

In an embodiment, on the basis of the foregoing embodiment, in the foregoing configuration information, multiple frequency bands correspond to one PDCCH search space. The above-mentioned PDCCH search space may be a common PDCCH search space, and the network device may configure the same common PDCCH search space for multiple terminal devices.

Optionally, the aforementioned PDCCH search space may not require LBT detection. The above-mentioned PDCCH search space may be in a controlled environment of deployment, and the network device may not need to perform LBT detection before sending DCI through the PDCCH search space. In the case where multiple frequency bands correspond to one PDCCH search space, the DCI corresponding to the downlink information sent by the network device in any frequency band in the multiple frequency bands can be sent to the terminal device through the PDCCH search space.

In the above data transmission method, when the network device sends downlink information based on multiple frequency bands, it can send DCI through the same PDCCH search space, so that the terminal can detect DCI through the PDCCH search space when the frequency band of the downlink information is not determined. , So as to receive the downlink information more timely and reliably, and improve the timeliness of data transmission.

Some embodiments are used to specifically introduce data transmission methods in a deployment controlled environment. For details, refer to the following:

In an implementation manner, the configuration information further includes multiple radio network temporary identities (Radio Network Tempory Identity, RNTI for short), and different frequency bands correspond to different RNTIs.

The above-mentioned RNTI is used to distinguish terminals corresponding to different DCIs. Each terminal can correspond to multiple RNTIs. The terminal can monitor the PDCCH transmission with the RNTI address in the PDCCH search space, and then obtain the DCI in the PDCCH transmission.

The foregoing configuration information may include correspondences between multiple frequency bands and multiple RNTIs of the terminal, and different frequency bands correspond to different RNTIs. After detecting the DCI, the terminal can determine which frequency band the downlink data of the terminal is in based on the foregoing corresponding relationship, and then obtain the downlink information sent by the network device on the frequency band corresponding to the RNTI.

Optionally, the process in which the terminal monitors PDCCH transmission based on the configuration information may be as shown in FIG. 3, which includes:

S201. Select at least one target RNTI from multiple RNTIs.

The above-mentioned target RNTI may be one of the RNTIs in the configuration information, or two or more RNTIs in the configuration information, or all RNTIs included in the configuration information, which is not limited here.

Specifically, the terminal may randomly select at least one target RNTI from multiple RNTIs in the configuration information, or may select sequentially according to the numbers of multiple RNTIs.

Optionally, different frequency bands may have different priorities, and the terminal may select at least one target RNTI from multiple RNTIs according to the priorities of multiple frequency bands. Specifically, the terminal can select the RNTI corresponding to the frequency band with the highest priority as the target RNTI, or the RNTI corresponding to the frequency band with the second highest priority as the target RNTI, and can also select the two frequency bands corresponding to the highest priority frequency band and the second highest priority frequency band at the same time. One RNTI is the target RNTI, which is not limited here. Optionally, the frequency band corresponding to the target RNTI has the highest priority.

For example, the configuration information includes the first frequency band and the second frequency band. The first frequency band corresponds to the first RNTI and the second frequency band corresponds to the second RNTI. The priority of the first frequency band is higher than the priority of the second frequency band, and the terminal can choose The first RNTI is the target RNTI.

S202: Monitor the transmission of the PDCCH whose address is the target RNTI in the PDCCH search space.

After selecting the target RNTI, the terminal can monitor the PDCCH transmission with the target RNTI address in the PDCCH search space based on the target RNTI.

Specifically, the terminal may simultaneously monitor PDCCH transmissions with addresses of multiple target RNTIs, or may sequentially monitor PDCCH transmissions with addresses of different target RNTIs, which is not limited here. For example, the terminal selects two target RNTIs for monitoring. The above two target RNTIs include the first RNTI and the second RNTI. The terminal can simultaneously monitor the PDCCH transmission with the address of the first RNTI and the PDCCH transmission with the address of the second RNTI in the PDCCH search space. In addition, the terminal can also monitor the PDCCH transmission with the address of the first RNTI first, and then monitor the PDCCH transmission with the address of the second RNTI.

If the PDCCH transmission with the address of the target RNTI is monitored, the terminal device can detect the DCI in the PDCCH transmission, and learn from the configuration information that the downlink information sent by the network device is in the frequency band corresponding to the target RNTI. Obtain the downlink information sent by the network device on the frequency band corresponding to the target RNTI.

When the terminal does not monitor the PDCCH transmission with the address of the target RNTI, it can select a new target RNTI from multiple RNTIs, and then monitor the PDCCH transmission with the address of the new target RNTI in the PDCCH search space. If the PDCCH transmission with the address of the new target RNTI is monitored, the downlink information is received on the frequency band corresponding to the new target RNTI.

Optionally, the terminal may select a new target RNTI from multiple RNTIs according to the priority of each frequency band. Optionally, the priority of the frequency band corresponding to the new target RNTI is lower than the priority of the frequency band corresponding to the target RNTI. For example, the configuration information contains three frequency bands arranged in order of priority: the first frequency band, the second frequency band, and the third frequency band, which correspond to the first RNTI, the second RNTI, and the third RNTI respectively; the terminal can be based on the priority order, first The first RNTI is selected for monitoring. If the PDCCH transmission with the address of the first RNTI is not monitored, the second RNTI and the third RNTII are selected in turn to continue monitoring.

In the above data transmission method, since the configuration information also includes multiple wireless network temporary identification RNTIs, and different frequency bands correspond to different RNTIs, when a network device selects a frequency band to send downlink information, it can use the RNTI corresponding to the target frequency band to scramble the DCI , So that the terminal can determine which frequency band has downlink information according to the corresponding relationship in the configuration information after listening to the PDCCH transmission with the address of the target RNTI, so that the terminal device can clearly receive downlink information in this frequency band, reducing the downlink information Furthermore, because different frequency bands have different priorities, terminal equipment can determine the frequency band where the network equipment is most likely to send downlink information according to the priority, and select the RNTI corresponding to this frequency band to monitor PDCCH transmission, which improves The monitoring efficiency of DCI.

In another implementation manner, the configuration information further includes an RNTI corresponding to the terminal, the PDCCH search space includes multiple PDCCH subspaces, and the multiple PDCCH subspaces respectively correspond to different frequency bands.

The foregoing configuration information may include correspondences between multiple frequency bands and PDCCH subspaces, and different frequency bands correspond to different PDCCH subspaces. The terminal can monitor the PDCCH transmission with the RNTI address in multiple PDCCH subspaces, and detect the DCI in the PDCCH transmission. Specifically, the terminal may monitor PDCCH transmission with an address of RNTI in the PDCCH search space, or may monitor in different PDCCH subspaces respectively, which is not limited here. After detecting the DCI, the terminal can determine in which PDCCH subspace the DCI is detected, so that it can determine which frequency band the downlink data of the terminal is in based on the foregoing corresponding relationship. Further, the terminal may obtain the downlink information sent by the network device on the frequency band corresponding to the PDCCH subspace where the DCI is located.

Optionally, the terminal may select a target PDCCH subspace in the PDCCH search space, and monitor PDCCH transmission with an RNTI address in the target PDCCH subspace. Specifically, the terminal may randomly select a target PDCCH subspace from the multiple PDCCH subspaces in the configuration information, or select sequentially according to the numbers in the multiple PDCCH subspaces, which is not limited here. Optionally, different frequency bands may have different priorities, and the terminal may select the target PDCCH subspace according to the priorities of multiple frequency bands, as shown in Figure 4:

S301. Select a target PDCCH subspace from the multiple PDCCH subspaces according to the priorities of multiple frequency bands.

Different frequency bands have different priorities, and the terminal can select a target PDCCH subspace from multiple PDCCH subspaces according to the priorities of multiple frequency bands. The terminal may select the PDCCH subspace corresponding to the frequency band with the highest priority as the target PDCCH subspace; or may select the PDCCH subspace corresponding to the frequency band with the second highest priority as the target PDCCH subspace. Optionally, the frequency band corresponding to the target PDCCH subspace has the highest priority.

For example, the configuration information includes a first frequency band and a second frequency band, where the first frequency band corresponds to the first PDCCH subspace, the second frequency band corresponds to the second PDCCH subspace, and the priority of the first frequency band is higher than the priority of the second frequency band , The terminal can select the first PDCCH subspace as the target PDCCH subspace.

S302. In the target PDCCH subspace, monitor the transmission of the PDCCH with the RNTI address.

After selecting the target PDCCH subspace, the terminal can monitor the PDCCH transmission with the RNTI address in the target PDCCH subspace, and detect the DCI in the PDCCH transmission. If the PDCCH transmission with the address of RNTI is monitored on the target PDCCH subspace, the terminal device can determine which frequency band the downlink information sent by the network device is in according to the correspondence between the PDCCH subspace and the frequency band in the configuration information. Further, the terminal may obtain the downlink information sent by the network device on the frequency band corresponding to the target PDCCH subspace based on the indication of the DCI.

If the PDCCH transmission with the address of RNTI is not monitored in the target PDCCH subspace, the terminal can select a new target PDCCH subspace from multiple PDCCH subspaces, and then continue to monitor the PDCCH transmission with the address of RNTI in the new PDCCH subspace . If the monitoring is successful in the new target PDCCH subspace, the downlink information sent by the network device is acquired on the frequency band corresponding to the new target PDCCH subspace based on the indication of the DCI.

Optionally, the terminal may select a new target subspace according to the priority of each frequency band, and the priority of the frequency band corresponding to the new target PDCCH subspace is lower than the priority of the frequency band corresponding to the target PDCCH subspace. For example, the terminal does not monitor the PDCCH transmission with the address of RNTI in the PDCCH subspace corresponding to the frequency band with the highest priority, and continues to monitor in the PDCCH subspace corresponding to the frequency band with the second highest priority.

In the above data transmission method, since the PDCCH search space includes multiple PDCCH subspaces, and different frequency bands correspond to different PDCCH subspaces, when a network device selects a target frequency band to send downlink information, it can send it in the PDCCH subspace corresponding to the target frequency band DCI enables the terminal to determine which frequency band has downlink information according to the PDCCH subspace where DCI is located after detecting DCI, so that downlink information can be directly received in this frequency band, reducing the transmission delay of downlink information; further Since different frequency bands have different priorities, the terminal device can select the appropriate RNTI to monitor the PDCCH transmission according to the priority, which improves the monitoring efficiency of the PDCCH transmission.

In another implementation manner, the configuration information further includes an RNTI corresponding to the terminal, and the terminal can monitor the PDCCH transmission with the RNTI in the PDCCH search space. Further, after monitoring the transmission of the PDCCH with the RNTI address, the terminal may further determine the target frequency band from multiple frequency bands; then, based on the DCI and the target frequency band in the PDCCH transmission, obtain the downlink information sent by the network device.

Optionally, when determining the target frequency band from multiple frequency bands, the terminal may determine which frequency band it is according to an indication of the DCI. The DCI may have frequency band indication information, and the above frequency band indication information is used to determine the target frequency band. The terminal can directly determine which frequency band has downlink information according to the indication of the DCI. The foregoing frequency band indication information may indicate the central frequency band of the frequency band, or may be only the number of the frequency band, which is not limited here.

Optionally, different frequency bands have different priorities, and the terminal may determine the target frequency band from the multiple frequency bands according to the priorities of the multiple frequency bands. The terminal can select the frequency band with the highest priority as the target frequency band, or select the frequency band with the second highest priority as the target frequency band, which is not limited here. Optionally, the priority of the target frequency band is the highest.

Further, the terminal may determine whether there is downlink data on the target frequency band based on the indication of the DCI. If no downlink information is received on the target frequency band based on the DCI, the terminal can determine a new target frequency band from multiple frequency bands, and obtain the downlink information sent by the network device based on the DCI and the new target frequency band.

Optionally, the terminal may select a new target frequency band according to the priorities of multiple frequency bands, and the priority of the new target frequency band is lower than the priority of the target frequency band.

For example, the configuration information includes the first frequency band and the second frequency band, where the priority of the first frequency band is higher than the priority of the second frequency band, the terminal may first determine whether there is downlink information in the first frequency band based on the indication of the DCI, if so, Then obtain the downlink information sent by the network device. If the terminal does not receive downlink information in the first frequency band based on the DCI, the terminal can continue to determine whether it has downlink information in the second frequency band.

The reference positions with downlink information in different frequency bands can be the same, that is to say, the relative position relationship between the time-frequency position with downlink information in the first frequency band and the starting reference point of the first frequency band is the same as that in the second frequency band with downlink information The relative positional relationship between the time-frequency position of and the starting reference point of the second frequency band is the same.

In the above data transmission method, the terminal monitors the PDCCH transmission through an RNTI. After monitoring the PDCCH transmission with the RNTI address, it can directly determine the target frequency band based on the frequency band indication information in the DCI in the PDCCH transmission, so that the terminal device can quickly be in the target frequency band Receiving the downlink information reduces the data transmission delay of the downlink information; further, when the DCI does not have frequency band indication information, the terminal can search for the corresponding downlink information resource location in each frequency band based on the DCI indication information. The downlink information enables the terminal to receive the downlink information smoothly, which improves the transmission reliability of the downlink information.

In an embodiment, the configuration information further includes an RNTI corresponding to the terminal, where different frequency bands respectively correspond to different PDCCH search spaces.

The terminal can monitor the transmission of the PDCCH with the address of RNTI in multiple PDCCH search spaces. After monitoring the transmission of the PDCCH with the address of RNTI, it can obtain the data sent by the network device on the frequency band corresponding to the PDCCH search space where the DCI in the PDCCH transmission is located. Downstream information.

Optionally, the process in which the terminal monitors PDCCH transmission based on the configuration information, as shown in FIG. 5, may include:

S401. Select a target PDCCH search space from multiple PDCCH search spaces.

Specifically, the terminal may randomly select a PDCCH search space as the target PDCCH search space from multiple PDCCH search spaces, or may select a target PDCCH search space according to the number of the PDCCH search space, which is not limited here.

Optionally, different frequency bands have different priorities, and the terminal may select a target PDCCH search space from multiple PDCCH search spaces according to the priorities of multiple frequency bands. The terminal may select the PDCCH search space corresponding to the frequency band with the highest priority as the target PDCCH search space, or select the PDCCH search space corresponding to the frequency band with the second highest priority as the target PDCCH search space, which is not limited here. Optionally, the frequency band corresponding to the target PDCCH search space has the highest priority.

S402: In the target PDCCH search space, monitor the transmission of the PDCCH with the RNTI address.

If the PDCCH transmission with the address of RNTI is monitored on the target PDCCH search space, the terminal obtains the downlink information sent by the network device on the frequency band corresponding to the target PDCCH search space based on the indication of the DCI in the PDCCH transmission.

If the PDCCH transmission with the address of RNTI is not monitored in the target PDCCH search space, the terminal can select a new target PDCCH search space from multiple PDCCH search spaces; then in the new target PDCCH search space, monitor the PDCCH with the address of RNTI transmission. Optionally, the terminal can select a new target PDCCH search space among multiple PDCCH search spaces according to the priorities of multiple frequency bands, and the priority of the frequency band corresponding to the new target PDCCH search space is lower than that of the target PDCCH search space The priority of the frequency band.

In the above data transmission method, since different frequency bands in the configuration information correspond to different PDCCH search spaces, the network device can send downlink information through multiple frequency bands, so that the terminal can monitor the PDCCH transmission with the address of RNTI in the PDCCH search space corresponding to each frequency band. After monitoring the transmission of the PDCCH with the address of RNTI, the downlink information can be received on the frequency band corresponding to the PDCCH search space. If it cannot be monitored, it will directly jump to the PDCCH search space corresponding to other frequency bands to continue monitoring, so that the downlink information It can be received by terminal equipment more timely and reliably.

Fig. 6 is a schematic flowchart of a data transmission method in an embodiment. The data transmission method in this embodiment is described by taking the network device running in FIG. 1 as an example. As shown in Figure 6, the above-mentioned data transmission method includes the following steps:

S501. Obtain configuration information, where the configuration information includes multiple frequency bands configured for the terminal by the network device for sending downlink information, and physical downlink control channel PDCCH search spaces corresponding to the multiple frequency bands.

Wherein, the specific limitation on the configuration information is similar to the foregoing embodiment, and will not be repeated here.

Specifically, the network device may call the above configuration information in the storage space of the network device before sending the downlink information, or it may configure the above configuration information for the terminal according to the identification of the terminal device, the network detection result, the deployment mode, etc., here Not limited. For example, when the terminal registers on the network, the network device configures the above-mentioned configuration information for the terminal, sends the configuration information to the terminal device, and stores the configuration information in the storage space of the network device.

S502: Send downlink control information DCI and downlink information to the terminal based on the multiple frequency bands and the PDCCH search space.

Before sending downlink information to the terminal, the network device can perform LBT detection on multiple frequency bands to determine which frequency band is in an idle state. Specifically, the network device can perform LBT detection on multiple frequency bands at the same time, or can perform LBT detection on multiple frequency bands in sequence, which is not limited here.

When a network device sends downlink information based on multiple frequency bands, it can send downlink information through one of the multiple frequency bands, or it can simultaneously send downlink information through multiple frequency bands, which improves the probability that the terminal device successfully receives the downlink information. After the network sends downlink information to the terminal based on multiple frequency bands, the DCI corresponding to the downlink information can be sent to the terminal through the PDCCH search space.

In one embodiment, the network device may select a target frequency band among multiple frequency bands, and perform LBT detection on the target frequency band. The network device can randomly select a target frequency band from multiple frequency bands, or select it according to the number of the target frequency band, which is not limited here. If the result of the LBT detection indicates that the target frequency band is available, the downlink information is sent to the terminal on the target frequency band, and the DCI is sent in the PDCCH search space corresponding to the target frequency band.

For example, after the LBT of the first frequency band fails, the network device performs LBT detection on the second frequency band. If the LBT detection result of the second frequency band shows an idle state, the network device can send the downlink in the second frequency band detected as idle by LBT It is not necessary to continue to perform LBT detection on the first frequency band after a period of time back as required, so that the terminal device can receive the downlink information in a more timely manner.

In an embodiment, different frequency bands have different priorities, and the network device may select a target frequency band among the multiple frequency bands according to the priorities of the multiple frequency bands. The network device can select the frequency band with the highest priority as the target frequency band, or the frequency band with the second highest priority as the target frequency band, which is not limited here.

In one embodiment, if the result of the LBT detection indicates that the target frequency band is not available, the network device may select a new target frequency band among multiple frequency bands, and perform LBT detection on the new target frequency band.

In one embodiment, the network device may select a new target frequency band among the multiple frequency bands according to the priorities of the multiple frequency bands, and the priority of the new target frequency band is lower than the priority of the target frequency band.

In one embodiment, in the configuration information, multiple frequency bands correspond to one PDCCH search space.

In an embodiment, the above-mentioned PDCCH search space does not need to perform listen-before-speak LBT detection.

In an embodiment, the configuration information further includes multiple wireless network temporary identifiers, RNTIs, and different frequency bands correspond to different RNTIs.

In an embodiment, the configuration information further includes an RNTI corresponding to the terminal, the PDCCH search space includes multiple PDCCH subspaces, and the multiple PDCCH subspaces respectively correspond to different frequency bands.

In an embodiment, the configuration information further includes an RNTI corresponding to the terminal, the DCI has frequency band indication information, and the frequency band indication information is used to determine the target frequency band.

In an embodiment, the configuration information further includes an RNTI corresponding to the terminal, and different frequency bands respectively correspond to different PDCCH search spaces.

In one embodiment, the network device may send configuration information to the terminal.

Specifically, the terminal device can obtain the configuration information sent by the network device when registering to the network, and can also obtain the configuration information sent by the network device when switching to an unlicensed frequency band work scenario, which is not limited here.

Optionally, the network device may send configuration information to the terminal through radio resource control RRC signaling.

Optionally, the network device sends configuration information to the terminal through media access control layer MAC signaling.

The implementation principles and technical effects of the foregoing data transmission method are similar to the implementation principles and technical effects in the foregoing terminal-side embodiment, and will not be repeated here.

In an embodiment, as shown in FIG. 7, the interaction process between the terminal and the network device is as follows:

S601. The network device sends configuration information to the terminal.

S602. The network device sends downlink control information DCI and downlink information to the terminal based on multiple frequency bands and PDCCH search spaces;

S603: The terminal monitors PDCCH transmission based on the configuration information issued by the network device; the PDCCH transmission includes the DCI sent by the network device;

S604: The terminal obtains downlink information sent by the network device according to the DCI and multiple frequency bands.

The implementation principles and technical effects of the foregoing data transmission method are similar to the implementation principles and technical effects in the foregoing embodiment, and will not be repeated here.

It should be understood that although the steps in the flowcharts of FIGS. 2-7 are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless specifically stated in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least part of the steps in Figure 2-2 may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. These sub-steps or stages The order of execution of is not necessarily performed sequentially, but may be performed alternately or alternately with at least a part of other steps or sub-steps or stages of other steps.

In one embodiment, a data transmission device is provided. As shown in FIG. 8, the above data transmission device includes a monitoring module 110 and an acquisition module 120, wherein:

The monitoring module 110 is used to monitor the physical downlink control channel PDCCH transmission based on the configuration information issued by the network device; the PDCCH transmission includes the transmission of the network device; the configuration information includes the multiple frequency bands configured by the network device for the terminal to send downlink information, And the physical downlink control channel PDCCH search space corresponding to multiple frequency bands;

The obtaining module 120 is configured to obtain downlink information sent by a network device according to DCI and multiple frequency bands.

In an embodiment, on the basis of the foregoing embodiment, in the configuration information, multiple frequency bands correspond to one PDCCH search space.

In an embodiment, on the basis of the foregoing embodiment, the PDCCH search space does not need to perform listen-before-speak LBT detection.

In an embodiment, on the basis of the foregoing embodiment, the configuration information further includes multiple wireless network temporary identification RNTIs, and different frequency bands correspond to different RNTIs.

In an embodiment, on the basis of the foregoing embodiment, as shown in FIG. 9, the foregoing monitoring module 110 includes:

The first selection unit 1101 is configured to select at least one target RNTI from a plurality of RNTIs;

The first monitoring unit 1102 is configured to monitor PDCCH transmission with the address of the target RNTI in the PDCCH search space.

In an embodiment, on the basis of the foregoing embodiment, different frequency bands have different priorities, and the first selection unit 1101 is specifically configured to: select at least one target from multiple RNTIs according to the priorities of the multiple frequency bands RNTI.

In an embodiment, on the basis of the foregoing embodiment, the frequency band corresponding to the target RNTI has the highest priority.

In one embodiment, on the basis of the above-mentioned embodiment, the above-mentioned monitoring module 110 is further configured to: when no PDCCH transmission with the address of the target RNTI is monitored, select a new target RNTI from multiple RNTIs; in the PDCCH search space The medium monitoring address is the PDCCH transmission of the new target RNTI.

In one embodiment, based on the foregoing embodiment, the priority of the frequency band corresponding to the new target RNTI is lower than the priority of the frequency band corresponding to the target RNTI.

In an embodiment, on the basis of the foregoing embodiment, the obtaining module 120 is specifically configured to: obtain the downlink information sent by the network device on the frequency band corresponding to the target RNTI.

In an embodiment, on the basis of the foregoing embodiment, the configuration information further includes an RNTI corresponding to the terminal, the PDCCH search space includes multiple PDCCH subspaces, and the multiple PDCCH subspaces respectively correspond to different frequency bands.

In an embodiment, on the basis of the foregoing embodiment, the foregoing monitoring module 110 is specifically configured to: monitor PDCCH transmission with an RNTI address in multiple PDCCH subspaces.

In an embodiment, based on the foregoing embodiment, as shown in FIG. 10, different frequency bands have different priorities, and the foregoing monitoring module 110 includes:

The second selection unit 1103 is configured to select a target PDCCH subspace from the multiple PDCCH subspaces according to the priorities of multiple frequency bands;

The second monitoring unit 1104 is configured to monitor PDCCH transmission with an RNTI address in the target PDCCH subspace.

In an embodiment, on the basis of the foregoing embodiment, the frequency band corresponding to the target PDCCH subspace has the highest priority.

In one embodiment, on the basis of the above-mentioned embodiment, the above-mentioned monitoring module 110 is further configured to: if no PDCCH transmission with an address of RNTI is monitored in the target PDCCH subspace, select a new one from the multiple PDCCH subspaces In the new target PDCCH subspace, monitor the transmission of the PDCCH with the RNTI address.

In one embodiment, based on the foregoing embodiment, the priority of the frequency band corresponding to the new target PDCCH subspace is lower than the priority of the frequency band corresponding to the target PDCCH subspace.

In an embodiment, on the basis of the foregoing embodiment, the obtaining module 120 is further configured to obtain the downlink information sent by the network device on the frequency band corresponding to the PDCCH subspace where the DCI is located.

In an embodiment, on the basis of the foregoing embodiment, the configuration information further includes an RNTI corresponding to the terminal, and the foregoing monitoring module 110 is specifically configured to: in the PDCCH search space, monitor PDCCH transmission with an RNTI address.

In an embodiment, on the basis of the foregoing embodiment, as shown in FIG. 11, the foregoing acquisition module 120 includes:

The determining unit 1201 is configured to determine a target frequency band from multiple frequency bands;

The receiving unit 1202 is configured to obtain the downlink information sent by the network device based on the DCI and the target frequency band.

In an embodiment, on the basis of the foregoing embodiment, the DCI has frequency band indication information, and the frequency band indication information is used to determine the target frequency band.

In one embodiment, on the basis of the foregoing embodiment, different frequency bands have different priorities, and the determining unit 1201 is specifically configured to determine the target frequency band from the multiple frequency bands according to the priorities of the multiple frequency bands.

In an embodiment, on the basis of the foregoing embodiment, the priority of the target frequency band is the highest.

In one embodiment, on the basis of the above-mentioned embodiment, the above-mentioned acquisition module 120 is further configured to: if no downlink information is received on the target frequency band based on DCI, determine a new target frequency band from multiple frequency bands, and based on the DCI And the new target frequency band to obtain the downlink information sent by the network device.

In one embodiment, on the basis of the foregoing embodiment, the priority of the new target frequency band is lower than the priority of the target frequency band.

In an embodiment, on the basis of the foregoing embodiment, the configuration information further includes an RNTI corresponding to the terminal, and different frequency bands respectively correspond to different PDCCH search spaces.

In an embodiment, on the basis of the foregoing embodiment, as shown in FIG. 12, the foregoing monitoring module 110 includes:

The third selection unit 1105 is configured to select a target PDCCH search space from multiple PDCCH search spaces;

The third monitoring unit 1106 is configured to monitor PDCCH transmission with an RNTI address in the target PDCCH search space.

In an embodiment, on the basis of the foregoing embodiment, different frequency bands have different priorities, and the third selection unit 1105 is specifically configured to: select one from multiple PDCCH search spaces according to the priorities of the multiple frequency bands Target PDCCH search space.

In an embodiment, on the basis of the foregoing embodiment, the frequency band corresponding to the target PDCCH search space has the highest priority.

In an embodiment, on the basis of the above-mentioned embodiment, the above-mentioned monitoring module 110 is further configured to: if no PDCCH transmission with an address of RNTI is monitored in the target PDCCH search space, select a new target from multiple PDCCH search spaces PDCCH search space; in the new target PDCCH search space, the PDCCH transmission whose address is RNTI is monitored.

In one embodiment, based on the foregoing embodiment, the priority of the frequency band corresponding to the new target PDCCH search space is lower than the priority of the frequency band corresponding to the target PDCCH search space.

In an embodiment, on the basis of the foregoing embodiment, the foregoing obtaining module 120 is further configured to: obtain downlink information sent by a network device on a frequency band corresponding to the PDCCH search space where the DCI is located.

The implementation principle and technical effect of a data transmission device provided by the foregoing embodiment are similar to those of the foregoing method embodiment, and will not be repeated here.

In one embodiment, a data transmission device is provided, including a sending module 210 and a receiving module 220, as shown in FIG. 13:

The obtaining module 210 is configured to obtain configuration information, where the configuration information includes multiple frequency bands configured for the terminal by the network device for sending downlink information, and the physical downlink control channel PDCCH search space corresponding to the multiple frequency bands;

The sending module 220 is configured to send downlink control information DCI and downlink information to the terminal based on multiple frequency bands and PDCCH search spaces.

In an embodiment, on the basis of the foregoing embodiment, as shown in FIG. 14, the foregoing sending module 220 includes:

The detection unit 2201 is configured to select a target frequency band among multiple frequency bands, and perform LBT detection on the target frequency band;

The sending unit 2202 is configured to send downlink information to the terminal on the target frequency band when the result of the LBT detection indicates that the target frequency band is available, and send DCI in the PDCCH search space corresponding to the target frequency band.

In an embodiment, on the basis of the foregoing embodiment, different frequency bands have different priorities, and the foregoing detection unit is specifically configured to: select a target frequency band among the multiple frequency bands according to the priorities of the multiple frequency bands.

In one embodiment, on the basis of the foregoing embodiment, the foregoing sending module 220 is further configured to: if the result of the LBT detection indicates that the target frequency band is unavailable, select a new target frequency band from the multiple frequency bands, and select a new target frequency band in the new Perform LBT detection on the target frequency band.

In an embodiment, on the basis of the foregoing embodiment, the configuration information further includes an RNTI corresponding to the terminal.

In an embodiment, on the basis of the foregoing embodiment, the sending module 220 is further configured to send configuration information to the terminal.

In an embodiment, on the basis of the foregoing embodiment, the sending module 220 is further configured to send configuration information to the terminal through radio resource control RRC signaling.

In an embodiment, on the basis of the foregoing embodiment, the sending module 220 is further configured to send configuration information to the terminal through media access control layer MAC signaling.

The division of the modules in the above-mentioned data transmission device is only used for illustration. In other embodiments, the data transmission device can be divided into different modules as needed to complete all or part of the functions of the above-mentioned data transmission device.

For the specific definition of the data transmission device, please refer to the above definition of the data transmission method, which will not be repeated here. Each module in the above-mentioned data transmission device can be implemented in whole or in part by software, hardware and a combination thereof. The foregoing modules may be embedded in the form of hardware or independent of the processor in the computer device, or may be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the foregoing modules.

In one embodiment, a terminal is provided, see FIG. 15. FIG. 15 is a schematic structural diagram of a terminal device provided by an embodiment of the present invention. The terminal 200 shown in FIG. 15 includes: at least one processor 201, a memory 202, at least one network interface 204, and a user interface 203. The various components in the terminal device 200 are coupled together through the bus system 205. It can be understood that the bus system 205 is used to implement connection and communication between these components. In addition to the data bus, the bus system 205 also includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are marked as the bus system 205 in FIG. 14. In addition, in the embodiment of the present invention, a receiver 206 is further included, which provides a unit for communicating with various other devices on the transmission medium. Wherein, the user interface 203 may include a display, a keyboard or a pointing device (for example, a mouse, a trackball (trackball), a touch panel or a touch screen, etc.). It is understood that the memory 202 in the embodiment of the present invention may be a volatile memory or a non-volatile memory. The non-volatile memory may include both volatile and non-volatile memory. Among them, the non-volatile memory may be a read-only memory (Read-OnlyMemory, ROM), a programmable read-only memory (ProgrammableROM, PROM), Erasable programmable read-only memory (ErasablePROM, EPROM), electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (Random Access Memory, RAM), which is used as External cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (StaticRAM, SRAM), dynamic random access memory (DynamicRAM, DRAM), synchronous dynamic random access memory (SynchronousDRAM) , SDRAM), double data rate synchronous dynamic random access memory (DoubleDataRate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (SynchlinkDRAM, SLDRAM) and direct Memory bus random access memory (Direct Rambus RAM, DRRAM). The memory 202 of the system and method described in the embodiment of the present invention is intended to include, but is not limited to, these and any other suitable types of memory.

In some embodiments, the memory 202 stores the following elements, executable modules or data structures, or a subset of them, or an extended set of them: an operating system 2021 and an application program 2022. Among them, the operating system 2021 includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., for implementing various basic services and processing hardware-based tasks. The application program 2022 includes various application programs, such as a media player (MediaPlayer), a browser (Browser), etc., which are used to implement various application services. The program for implementing the method of the embodiment of the present invention may be included in the application program 2022.

In the embodiment of the present invention, by calling the program or instruction stored in the memory 202, specifically, it may be a program or instruction stored in the application program 2022, where the receiver 206 cooperates with the processor 201 to: The configuration information sent, monitor the physical downlink control channel PDCCH transmission; the PDCCH transmission includes the downlink control information DCI sent by the network device; the configuration information includes the multiple frequency bands configured by the network device for the terminal to send downlink information, and the corresponding frequency bands Physical downlink control channel PDCCH search space; according to DCI and multiple frequency bands, obtain downlink information sent by network equipment.

Part or all of the methods disclosed in the foregoing embodiments of the present invention may also be applied to the processor 201, or implemented by the processor 201, or implemented by the processor 201 in cooperation with other elements (for example, a transceiver). The processor 201 may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method can be completed by an integrated logic circuit of hardware in the processor 201 or instructions in the form of software. The aforementioned processor 201 may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates Or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory 202, and the processor 201 reads the information in the memory 202, and completes the steps of the foregoing method in combination with its hardware.

It can be understood that the embodiments described in the embodiments of the present invention can be implemented by hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application specific integrated circuits (Application Specific Integrated Circuits, ASIC), digital signal processors (Digital Signal Processing, DSP), digital signal processing devices (DSP Device, DSPD), programmable logic devices (Programmable Logic Device, PLD) ), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), general-purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described in this application, or combinations thereof.

For software implementation, the technology described in the embodiments of the present invention can be implemented by modules (for example, procedures, functions, etc.) that execute the functions described in the embodiments of the present invention. The software codes can be stored in the memory and executed by the processor 201. The memory may be implemented in the processor 201 or external to the processor 201.

FIG. 16 is a schematic structural diagram of a network device provided by an embodiment of the present invention. The network device 100 shown in FIG. 16 includes: at least one processor 101, a memory 102, and at least one network interface 104. The various components in the access network device 100 are coupled together through the bus system 105. It can be understood that the bus system 105 is used to implement connection and communication between these components. In addition to the data bus, the bus system 105 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clear description, various buses are marked as the bus system 105 in FIG. 2. In addition, in the embodiment of the present invention, a transmitter 106 is further included, which provides a unit for communicating with various other devices on the transmission medium. It can be understood that the memory 102 in the embodiment of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-OnlyMemory, ROM), programmable read-only memory (ProgrammableROM, PROM), erasable programmable read-only memory (ErasablePROM, EPROM), electrically erasable Programming read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (StaticRAM, SRAM), dynamic random access memory (DynamicRAM, DRAM), synchronous dynamic random access memory (SynchronousDRAM, SDRAM), Double data rate synchronous dynamic random access memory (DoubleDataRate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (SynchlinkDRAM, SLDRAM) and direct memory bus random memory Take the memory (DirectRambusRAM, DRRAM). The memory 102 of the system and method described in the embodiment of the present invention is intended to include, but is not limited to, these and any other suitable types of memory.

In some embodiments, the memory 102 stores the following elements, executable modules or data structures, or a subset of them, or an extended set of them: operating system 1021. Among them, the operating system 1021 includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., for implementing various basic services and processing hardware-based tasks.

In the embodiment of the present invention, by calling a program or instruction stored in the memory 102, the transmitter 106 cooperates with the processor 101 to obtain configuration information. The configuration information includes a network device configured for the terminal to send downlink information. A frequency band, and a physical downlink control channel PDCCH search space corresponding to multiple frequency bands; based on the multiple frequency bands and PDCCH search space, downlink control information DCI and downlink information sent to the terminal.

For software implementation, the technology described in the embodiments of the present invention can be implemented by modules (for example, procedures, functions, etc.) that execute the functions described in the embodiments of the present invention. The software codes can be stored in the memory and executed by the processor 101. The memory may be implemented in the processor 101 or external to the processor 101.

Those skilled in the art can understand that the structure shown in FIG. 15 or FIG. 16 is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the network device or terminal to which the solution of the present application is applied. A specific network device or terminal may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

The implementation principle and technical effect of a network device and terminal provided by the foregoing embodiment are similar to those of the foregoing method embodiment, and will not be repeated here.

The embodiment of the present application also provides a computer-readable storage medium. One or more non-volatile computer-readable storage media containing computer-executable instructions, when the computer-executable instructions are executed by one or more processors, cause the processors to execute the steps of the data transmission method, including:

The foregoing embodiment provides a computer-readable storage medium, and its implementation principle and technical effect are similar to those of the foregoing method embodiment, and will not be repeated here.

A computer program product containing instructions that, when run on a computer, causes the computer to execute a data transmission method.

The above embodiments only express a few implementation modes of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can be made, and these all fall within the protection scope of this application. Therefore, the scope of protection of the patent of this application shall be subject to the appended claims.

Claims

A data transmission method, characterized in that it comprises:

Based on the configuration information issued by the network device, monitor the physical downlink control channel PDCCH transmission; the PDCCH transmission includes the downlink control information DCI sent by the network device; the configuration information includes the network device configured for the terminal to send downlink Multiple frequency bands of information, and PDCCH search spaces corresponding to the multiple frequency bands;

Acquire the downlink information sent by the network device according to the DCI and the multiple frequency bands.
The data transmission method according to claim 1, wherein in the configuration information, the multiple frequency bands correspond to one PDCCH search space.
The data transmission method according to claim 2, wherein the PDCCH search space does not require listening-before-speaking LBT detection.
The data transmission method according to claim 2 or 3, wherein the configuration information further includes a plurality of wireless network temporary identifiers, RNTIs, and different frequency bands correspond to different RNTIs.
The data transmission method according to claim 4, wherein the monitoring physical downlink control channel PDCCH transmission based on the configuration information issued by the network device comprises:

Selecting at least one target RNTI from the multiple RNTIs;

In the PDCCH search space, the PDCCH transmission whose address is the target RNTI is monitored.
The data transmission method according to claim 5, wherein different frequency bands have different priorities; the selecting at least one target RNTI from the multiple RNTIs includes:

According to the priorities of the multiple frequency bands, at least one target RNTI is selected from the multiple RNTIs.
The data transmission method according to claim 6, wherein the frequency band corresponding to the target RNTI has the highest priority.
The data transmission method according to any one of claims 5-7, wherein the method further comprises:

When no PDCCH transmission with the address of the target RNTI is monitored, selecting a new target RNTI from the multiple RNTIs;

In the PDCCH search space, the PDCCH transmission whose address is the new target RNTI is monitored.
The data transmission method according to claim 8, wherein the priority of the frequency band corresponding to the new target RNTI is lower than the priority of the frequency band corresponding to the target RNTI.
The data transmission method according to any one of claims 5-9, wherein the acquiring downlink information sent by the network device according to the DCI and the multiple frequency bands comprises:

Acquire the downlink information sent by the network device on the frequency band corresponding to the target RNTI.
The data transmission method according to claim 2 or 3, wherein the configuration information further includes an RNTI corresponding to the terminal, and the PDCCH search space includes multiple PDCCH subspaces; the multiple PDCCH subspaces Correspond to different frequency bands respectively.
The data transmission method according to claim 11, wherein the monitoring physical downlink control channel PDCCH transmission based on the configuration information issued by the network device comprises:

In the multiple PDCCH subspaces, the monitoring address is the PDCCH transmission of the RNTI.
The data transmission method according to claim 12, wherein different frequency bands have different priorities, and in the multiple PDCCH subspaces, the monitoring address of the PDCCH transmission of the RNTI includes:

Selecting a target PDCCH subspace from the multiple PDCCH subspaces according to the priorities of the multiple frequency bands;

In the target PDCCH subspace, the monitoring address is the PDCCH transmission of the RNTI.
The data transmission method according to claim 13, wherein the frequency band corresponding to the target PDCCH subspace has the highest priority.
The data transmission method according to claim 13 or 14, wherein the method further comprises:

If no PDCCH transmission with the address of the RNTI is monitored in the target PDCCH subspace, selecting a new target subspace from the multiple PDCCH subspaces;

In the new target PDCCH subspace, the monitoring address is the PDCCH transmission of the RNTI.
The data transmission method according to claim 15, wherein the priority of the frequency band corresponding to the new target PDCCH subspace is lower than the priority of the frequency band corresponding to the target PDCCH subspace.
The data transmission method according to any one of claims 11-16, wherein the acquiring downlink information sent by the network device according to the DCI and the multiple frequency bands comprises:

Acquire the downlink information sent by the network device on the frequency band corresponding to the PDCCH subspace where the DCI is located.
The data transmission method according to claim 2 or 3, wherein the configuration information further includes an RNTI corresponding to the terminal, and the physical downlink control channel PDCCH transmission is monitored based on the configuration information issued by the network device, include:

In the PDCCH search space, the monitoring address is the PDCCH transmission of the RNTI.
The data transmission method according to claim 18, wherein the acquiring downlink information sent by the network device according to the DCI and the multiple frequency bands comprises:

Determining a target frequency band from the multiple frequency bands;

Obtain downlink information sent by the network device based on the DCI and the target frequency band.
The data transmission method according to claim 19, wherein the DCI has frequency band indication information, and the frequency band indication information is used to determine the target frequency band.
The data transmission method according to claim 19, wherein different frequency bands have different priorities, and the determining the target frequency band from the multiple frequency bands comprises:

According to the priorities of the multiple frequency bands, a target frequency band is determined from the multiple frequency bands.
The data transmission method according to claim 21, wherein the target frequency band has the highest priority.
The data transmission method according to claim 21 or 22, wherein the method further comprises:

If the downlink information is not obtained on the target frequency band based on the DCI, a new target frequency band is determined from the multiple frequency bands, and the network is acquired based on the DCI and the new target frequency band Downlink information sent by the device.
The data transmission method according to claim 23, wherein the priority of the new target frequency band is lower than the priority of the target frequency band.
The data transmission method according to claim 1, wherein the configuration information further includes an RNTI corresponding to the terminal, and different frequency bands respectively correspond to different PDCCH search spaces.
The data transmission method according to claim 25, wherein the monitoring physical downlink control channel PDCCH transmission based on the configuration information issued by the network device comprises:

Selecting a target PDCCH search space from the plurality of PDCCH search spaces;

In the target PDCCH search space, the monitoring address is the PDCCH transmission of the RNTI.
The data transmission method according to claim 26, wherein different frequency bands have different priorities, and said selecting a target PDCCH search space from a plurality of said PDCCH search spaces comprises:

According to the priorities of the multiple frequency bands, a target PDCCH search space is selected from the multiple PDCCH search spaces.
The data transmission method according to claim 27, wherein the frequency band corresponding to the target PDCCH search space has the highest priority.
The data transmission method according to any one of claims 26-28, wherein the method further comprises:

If no PDCCH transmission with the address of the RNTI is monitored in the target PDCCH search space, select a new target PDCCH search space from a plurality of the PDCCH search spaces;

In the new target PDCCH search space, the PDCCH transmission whose listening address is the RNTI.
The data transmission method according to claim 29, wherein the priority of the frequency band corresponding to the new target PDCCH search space is lower than the priority of the frequency band corresponding to the target PDCCH search space.
The data transmission method according to any one of claims 25-30, wherein the acquiring downlink information sent by the network device according to the DCI and the multiple frequency bands comprises:

Acquire the downlink information sent by the network device on the frequency band corresponding to the PDCCH search space where the DCI is located.
A data transmission method, characterized in that it comprises:

Acquiring configuration information, where the configuration information includes multiple frequency bands configured by the network device for the terminal to send downlink information, and a physical downlink control channel PDCCH search space corresponding to the multiple frequency bands;

The downlink control information DCI and downlink information sent to the terminal based on the multiple frequency bands and the PDCCH search space.
The data transmission method according to claim 32, wherein the downlink control information DCI and downlink information sent to the terminal based on the multiple frequency bands and the PDCCH search space comprise:

Selecting a target frequency band among the multiple frequency bands, and performing LBT detection on the target frequency band;

If the result of the LBT detection indicates that the target frequency band is available, the downlink information is sent to the terminal on the target frequency band, and the DCI is sent in the PDCCH search space corresponding to the target frequency band.
The data transmission method according to claim 32, wherein different frequency bands have different priorities, and the selecting a target frequency band from the multiple frequency bands includes:

According to the priority of the multiple frequency bands, a target frequency band is selected from the multiple frequency bands.
The data transmission method according to claim 33 or 34, wherein the method further comprises:

If the result of the LBT detection indicates that the target frequency band is not available, a new target frequency band is selected from the multiple frequency bands, and LBT detection is performed on the new target frequency band.
The data transmission method according to claim 35, wherein the priority of the new target frequency band is lower than the priority of the target frequency band.
The data transmission method according to any one of claims 32-36, wherein in the configuration information, the multiple frequency bands correspond to one PDCCH search space.
The data transmission method according to claim 37, wherein the PDCCH search space does not require listening-before-speaking LBT detection.
The data transmission method according to claim 37 or 38, wherein the configuration information further includes a plurality of temporary wireless network identifiers, RNTIs, and different frequency bands correspond to different RNTIs.
The data transmission method according to claim 37 or 38, wherein the configuration information further includes an RNTI corresponding to the terminal, the PDCCH search space includes multiple PDCCH subspaces, and the multiple PDCCH subspaces Correspond to different frequency bands respectively.
The data transmission method according to claim 37 or 38, wherein the configuration information further includes an RNTI corresponding to the terminal.
The data transmission method according to claim 36, wherein the DCI has frequency band indication information, and the frequency band indication information is used to determine the target frequency band.
The data transmission method according to any one of claims 32-36, wherein the configuration information further includes an RNTI corresponding to the terminal, and different frequency bands correspond to different PDCCH search spaces.
The data transmission method according to any one of claims 32-43, wherein the method further comprises:

Sending the configuration information to the terminal.
The data transmission method according to claim 44, wherein the sending the configuration information to the terminal comprises:

The configuration information is sent to the terminal through radio resource control RRC signaling.
The data transmission method according to claim 44, wherein the sending the configuration information to the terminal comprises:

The configuration information is sent to the terminal through media access control layer MAC signaling.
A data transmission device is characterized in that it comprises:

The monitoring module is used to monitor the physical downlink control channel PDCCH transmission based on the configuration information issued by the network device; the PDCCH transmission includes the downlink control information DCI sent by the network device; the configuration information includes the network device configuration for the terminal Multiple frequency bands used for sending downlink information, and physical downlink control channel PDCCH search spaces corresponding to the multiple frequency bands;

The obtaining module is configured to obtain the downlink information sent by the network device according to the DCI and the multiple frequency bands.
A data transmission device is characterized in that it comprises:

An obtaining module, configured to obtain configuration information, where the configuration information includes multiple frequency bands configured by the network device for the terminal for sending downlink information, and the physical downlink control channel PDCCH search space corresponding to the multiple frequency bands;

The sending module is configured to send downlink control information DCI and downlink information to the terminal based on the multiple frequency bands and the PDCCH search space.
A terminal, including a receiver and a processor, is characterized in that:

The receiver cooperates with the processor to monitor the physical downlink control channel PDCCH transmission based on the configuration information issued by the network device; the PDCCH transmission includes the downlink control information DCI sent by the network device; the configuration The information includes multiple frequency bands configured by the network device for the terminal to send downlink information, and the physical downlink control channel PDCCH search space corresponding to the multiple frequency bands; according to the DCI and the multiple frequency bands, the Downlink information sent by network equipment.
A network device, including a transmitter and a processor, is characterized in that:

The transmitter cooperates with the processor to obtain configuration information, where the configuration information includes multiple frequency bands configured by the network device for the terminal for sending downlink information, and physical downlink control corresponding to the multiple frequency bands Channel PDCCH search space; based on the multiple frequency bands and the PDCCH search space, downlink control information DCI and downlink information sent to the terminal.
A computer-readable storage medium with a computer program stored thereon, wherein the computer program implements the steps of the data transmission method according to any one of claims 1 to 46 when the computer program is executed by a processor.