WO2024012548A1

WO2024012548A1 - Uplink transmission method and apparatus, and computer readable storage medium

Info

Publication number: WO2024012548A1
Application number: PCT/CN2023/107371
Authority: WO
Inventors: 邓云
Original assignee: 展讯通信（上海）有限公司
Priority date: 2022-07-15
Filing date: 2023-07-14
Publication date: 2024-01-18
Also published as: CN117460074A

Abstract

An uplink transmission method and apparatus, and a computer readable storage medium. The uplink transmission method comprises: acquiring downlink control information, the downlink control information instructing to perform uplink transmission in N serving cells; according to the current amount of data to be transmitted, selecting M serving cells from among the N serving cells to perform uplink transmission, wherein N and M are both integers, and M is greater than or equal to 0 and less than N. When the data to be transmitted is relatively small, some of the serving cells do not need to perform uplink transmission, reducing the number of serving cells performing uplink transmission, and improving the uplink resource utilization efficiency.

Description

Uplink transmission method and device, computer-readable storage medium

This application claims priority to the Chinese patent application filed with the China Patent Office on July 15, 2022, with the application number 202210832114.7 and the invention title "Uplink transmission method and device, computer-readable storage medium", the entire content of which is incorporated by reference. in this application.

Technical field

The present invention relates to the field of wireless communication technology, and in particular, to an uplink transmission method and device, and a computer-readable storage medium.

Background technique

In the New Radio (NR) system, consider introducing a Downlink Control Information (DCI) to schedule multiple serving cells. For uplink transmission, one DCI can schedule terminal equipment to perform uplink transmission in multiple serving cells.

In the existing technology, when a network device performs uplink scheduling on a terminal device, the terminal device needs to perform uplink transmission on all serving cells, which results in low uplink resource utilization efficiency and may cause interference.

Contents of the invention

The technical problem solved by the embodiments of the present invention is that when the terminal equipment performs uplink transmission, the uplink resource utilization efficiency is low and there is mutual interference.

In order to solve the above technical problems, embodiments of the present invention provide an uplink transmission method, which includes: obtaining downlink control information indicating uplink transmission in N serving cells; and based on the current data volume of data to be transmitted, from all the data to be transmitted. Describe N service cells Select M serving cells for uplink transmission; N and M are both integers and 0≤M<N.

Optionally, the same physical resource block resources are used for uplink transmission in the N serving cells; or different physical resource block resources are used for uplink transmission in the N serving cells.

Optionally, selecting M serving cells from the N serving cells for uplink transmission includes: selecting M serving cells from the N serving cells for uplink transmission according to preset selection rules.

Optionally, the preset selection rules include at least one of the following: select the top M serving cells with the smallest serving cell index number; select the top M serving cells with the largest serving cell index number; select from the N serving cells After excluding the serving cells configured to cancel uplink transmission, select M serving cells from the remaining serving cells; select the top M serving cells with the highest priority according to the preset priority; select from the preconfigured serving cell list There are M serving cells; the cells in the serving cell list are the serving cells that give priority to uplink transmission.

Optionally, selecting M serving cells from the N serving cells for uplink transmission includes: selecting M from the N serving cells that can carry the data to be transmitted and have the smallest sum of the number of uplink transmission carriers. A serving cell performs uplink transmission.

Optionally, if the amount of data to be transmitted is 0 and the configuration allows cancellation of uplink transmission in multi-serving cell scheduling, M is 0.

Optionally, the uplink transmission method also includes: if the amount of data to be transmitted is 0, select 1 serving cell from the N serving cells; use the selected serving cell to send indication information, the The indication information is used to indicate that there is currently no data to be transmitted.

Optionally, using the selected serving cell to send the indication information includes: sending uplink information including a filled cache status report on the selected serving cell.

Embodiments of the present invention also provide an uplink transmission device, including: an acquisition unit, configured to acquire downlink control information, where the downlink control information indicates transmission in N serving cells. Uplink transmission; a selection unit configured to select M serving cells from the N serving cells for uplink transmission according to the current amount of data to be transmitted; N and M are both integers and 0≤M<N.

Embodiments of the present invention also provide a computer-readable storage medium. The computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, and a computer program is stored thereon. The computer program is processed by a processor. When running, the steps of any of the above uplink transmission methods are executed.

An embodiment of the present invention also provides another uplink transmission device, including a memory and a processor. The memory stores a computer program that can be run on the processor. When the processor runs the computer program, it executes the above The steps of any one of the uplink transmission methods.

Compared with the existing technology, the technical solutions of the embodiments of the present invention have the following beneficial effects:

After receiving the downlink control information for scheduling uplink transmission, some serving cells are selected from the N serving cells for uplink transmission based on the current amount of data to be transmitted, instead of selecting all serving cells for uplink transmission, so the number of steps can be reduced. The number of serving cells for uplink transmission improves the efficiency of uplink resource utilization and can reduce interference between different serving cells.

Furthermore, the terminal device selects M serving cells with the smallest sum of the number of uplink transmission carriers from the configured N serving cells for uplink transmission, which can reduce the number of carriers that need to be processed and improve resource utilization efficiency.

In addition, if there is currently no data to be transmitted, one serving cell is selected from the N serving cells to send indication information to inform the network device that there is currently no data to be transmitted. After receiving the instruction information, the network device does not need to send the retransmission schedule again to avoid wasting uplink and downlink resources.

Description of drawings

Figure 1 is a flow chart of an uplink transmission method in an embodiment of the present invention;

Figure 2 is a schematic structural diagram of an uplink transmission device in an embodiment of the present invention.

Detailed ways

As mentioned in the background art above, when a network device performs uplink scheduling on a terminal device, the terminal device needs to perform uplink transmission on all scheduled serving cells, which results in low uplink resource utilization efficiency and may cause interference.

In the embodiment of the present invention, after the terminal device receives instructions to perform uplink transmission of downlink control information in N serving cells, it selects some serving cells from the N serving cells for uplink transmission based on the amount of data currently to be transmitted, instead of All serving cells are selected for uplink transmission, so the number of serving cells for uplink transmission can be reduced, uplink resource utilization efficiency can be improved, and interference between different serving cells can be reduced.

In order to make the above objects, features and beneficial effects of the present invention more obvious and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

First, some terms involved in the embodiments of this application are explained to facilitate understanding by those skilled in the art.

1. Terminal equipment. The terminal device in the embodiment of the present invention is a device with wireless communication functions, which can be called a terminal (terminal), user equipment (UE), mobile station (MS), mobile terminal (MT) ), access terminal equipment, vehicle-mounted terminal equipment, industrial control terminal equipment, UE unit, UE station, mobile station, remote station, remote terminal equipment, mobile equipment, UE terminal equipment, wireless communication equipment, UE agent or UE device, etc. Terminal equipment can be fixed or mobile. It should be noted that the terminal device may support at least one wireless communication technology, such as LTE, new radio (new radio, NR), etc. For example, the terminal device may be a mobile phone (mobile phone), tablet computer (pad), desktop computer, notebook computer, all-in-one computer, vehicle-mounted terminal, virtual reality (VR) terminal device, augmented reality (AR) terminal Equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, smart Wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, conversations Session initiation protocol (SIP) telephone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication capabilities, computing device or connected to a wireless modem Other processing equipment, wearable devices, terminal equipment in future mobile communication networks or terminal equipment in the future evolved public land mobile network (public land mobile network, PLMN), etc. In some embodiments of the present application, the terminal device may also be a device with transceiver functions, such as a chip system. Among them, the chip system may include chips and may also include other discrete devices.

2. Network equipment. In the embodiment of the present invention, the network device is a device that provides wireless communication functions for terminals, and may also be called a radio access network (radio access network, RAN) device, an access network element, etc. Among them, the network device can support at least one wireless communication technology, such as LTE, NR, etc. For example, network equipment includes but is not limited to: next-generation base station (generation nodeB, gNB), evolved node B (evolved node B, eNB), and wireless network control in the fifth-generation mobile communication system (5th-generation, 5G). Radio network controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (for example, home evolved node B, Or home node B (HNB), baseband unit (BBU), receiving point (transmitting and receiving point, TRP), transmitting point (TP), mobile switching center, etc. The network device may also be a wireless controller, a centralized unit (CU), and/or a distributed unit (DU) in a cloud radio access network (CRAN) scenario, or the network device may They are relay stations, access points, vehicle-mounted equipment, terminal equipment, wearable devices, and network equipment in future mobile communications or network equipment in future evolved PLMNs. In some embodiments, the network device may also be a device with a wireless communication function for the terminal device, such as a chip system. For example, the chip system may include a chip, and may also include other discrete devices.

In some embodiments, the network device can also communicate with an Internet Protocol (Internet Protocol, IP) network, such as the Internet, a private IP network, or other data networks.

An embodiment of the present invention provides an uplink transmission method. Referring to Figure 1, detailed description will be given below through specific steps.

In the embodiment of the present invention, the uplink transmission method corresponding to the following steps 101 to 102 can be executed by a chip with data processing capabilities (such as a baseband chip) in the terminal device, or by the terminal device including the above-mentioned chip with data processing capabilities. The chip is executed by the chip module.

Step 101: Obtain downlink control information, which indicates uplink transmission in N serving cells.

In specific implementation, the terminal device can access the primary serving cell (Primary cell, PCell), establish a radio resource control (Radio Resource Control, RRC) connection with the network device corresponding to the primary serving cell (hereinafter referred to as the primary network device), and establish One or more Data Radio Bearer (DRB).

The main network device can configure carrier aggregation (CA) for the terminal device, and configure one or more secondary serving cells (Secondary cell, SCell) for the terminal device.

In the NR system, the main network equipment (that is, the service base station to which the terminal equipment is connected) can simultaneously schedule multiple serving cells through a downlink control information (DCI). Multiple serving cells can be composed of one main cell and multiple It is composed of secondary cells; or it can be composed of all secondary cells. For a DCI scheduled terminal device to perform uplink and downlink transmission in multiple serving cells, it is called multi-carrier scheduling or multi-serving cell scheduling. Specifically, the main network device can schedule PCell and multiple SCells at the same time through DCI on PCell, or schedule multiple SCells at the same time through DCI on a certain SCell.

For example, the main network device configures four SCells for the terminal device, namely SCell1, SCell2, SCell3 and SCell4. Primary network device is scheduled via DCI on SCell1 Uplink transmission of SCell1~SCell4.

In specific applications, the above-mentioned SCell1 may be called a scheduling cell, and the above-mentioned SCell2, SCell3, and SCell4 may be called scheduled cells.

It should be noted that, unless otherwise stated, in the embodiment of the present invention, downlink control information (DCI) can be used to schedule terminal equipment to perform uplink transmission in multiple serving cells. These multiple serving cells all serve as terminals as main network devices. The service cell configured by the device.

Step 102: Select M serving cells from N serving cells for uplink transmission according to the current amount of data to be transmitted.

In this embodiment of the present invention, the terminal device can determine the number of serving cells for uplink transmission based on the amount of data currently to be transmitted. The amount of data currently to be transmitted may be positively related to the number of SCells. The data to be transmitted here generally refers to data and/or signaling, because for the physical layer, all high-level layers are data, so data represents the content to be transmitted.

That is to say, if the terminal device detects that the current amount of data to be transmitted is small, it determines that the number of serving cells for uplink transmission is small; if the terminal device detects that the current amount of data to be transmitted is large, it determines to perform uplink transmission. The number of transmitted serving cells is larger.

In the embodiment of the present invention, N and M are both integers, and 0<=M<N. That is to say, according to the current small amount of data to be transmitted, some of the scheduled N serving cells are selected for uplink transmission, and the other part of the serving cells are not for uplink transmission (or called canceling uplink transmission). It is not necessary for all serving cells to participate in uplink transmission.

In specific implementations, different serving cells may all use the same Physical Resource Block (PRB) or use different physical resource block resources for uplink transmission. The same PRB resource may refer to the scheduled PRB in Different serving cells have the same frequency domain location and the same number of scheduled PRBs.

In this embodiment of the present invention, the terminal device can select M serving cells from N serving cells for uplink transmission according to preset selection rules, that is, send uplink signals to the M serving cells.

In a specific implementation, the terminal device can select the top M serving cells with the smallest serving cell index number (index) for uplink transmission. When configuring carrier aggregation, each serving cell has a cell index number;

Alternatively, the terminal device can select the top M serving cells with the largest serving cell index numbers for uplink transmission;

Alternatively, the terminal device can select the top M serving cells with the highest priority for uplink transmission according to the preset priority order. When configuring carrier aggregation, the priority corresponding to each serving cell can be configured;

Alternatively, the terminal device can select the top M serving cells with the lowest priority according to the preset priority order for uplink transmission;

Or, after excluding the serving cells configured to allow uplink transmission cancellation, the terminal device randomly selects M serving cells for uplink data transmission. When configuring carrier aggregation, the main network device can determine whether the uplink transmission cancellation is allowed in the serving cell according to the serving cell settings. . Setting whether to allow uplink transmission cancellation according to the serving cell can reduce the processing complexity on the network side.

When the terminal device finds that the amount of data to be transmitted is 0, and the main network device configures the terminal device to allow it to cancel uplink transmission in multi-serving cell scheduling, the terminal device can cancel uplink transmission in all scheduled serving cells. At this time M can be taken as 0.

In the embodiment of the present invention, the main network device may also configure a serving cell list for the terminal device in advance, and the cells in the serving cell list are the serving cells that give priority to uplink transmission. The terminal device can select M serving cells from the serving cell list for uplink transmission. Specifically, the method of selecting M serving cells from the serving cell list may correspond to the above-mentioned method of selecting M serving cells from N serving cells, which will not be described again here.

The specific process of selecting M serving cells from N serving cells will be described below through an example.

Set the main network device to configure a main serving cell PCell for the terminal device, and also configure four auxiliary serving cells including SCell1, SCell2, SCell3, and SCell4. main network device SCell1 can be configured to schedule SCell1, SCell2, SCell3, and SCell4 at the same time.

After a period of uplink transmission by the terminal device, the amount of data required for uplink transmission becomes smaller. The main network device schedules the terminal device to perform uplink transmission on SCell1~SCell4 through a DCI located on SCell1. Uplink transmission is located in the third time slot after DCI.

The terminal equipment uses the same PRB resources in four SCells for uplink transmission. The same PRB resources correspond to the same frequency domain positions and quantities.

After receiving the DCI, the terminal device determines that only two SCells need to be used for uplink transmission based on the amount of data currently to be transmitted, and the current data to be transmitted can be completed. At this time, the terminal device selects two SCells in any of the following ways:

1. The terminal device selects SCell1 and SCell2 (that is, the two SCells with the smallest index numbers) for uplink transmission;

2. The terminal device selects SCell3 and SCell4 (that is, the two SCells with the largest index numbers) for uplink transmission;

3. The terminal device randomly selects SCell2 and SCell3 for uplink transmission;

4. According to the priority of different serving cells set by the main network device when configuring carrier aggregation for the terminal device, it is predetermined that SCell1 has the highest priority, SCell2 has the second priority, SCell3 and SCell4 have the lowest priority, then the terminal device selects SCell1. and SCell2 (that is, the two SCells with the highest priority) for uplink transmission;

5. The main network equipment pre-configures some serving cells to cancel uplink transmission. For example, SCell3 and SCell4 can be set to cancel uplink transmission. Therefore, the terminal equipment excludes SCell3 and SCell4 and selects SCell1 and SCell2 for uplink transmission.

In specific implementation, the PRB resources corresponding to different serving cells may not be exactly the same. At this time, the terminal device can select M serving cells from N serving cells that can carry the data to be transmitted and have the smallest sum of the number of uplink transmission carriers for uplink transmission.

For example, the uplink transmission resources scheduled by SCell1 and SCell2 are 15 PRBs, and SCell3 The scheduled uplink transmission resources are 20 PRBs, and the SCell4 scheduled uplink transmission resources are 25 PRBs.

The terminal device receives the DCI that schedules 4 SCells for uplink transmission at a time. Based on the current amount of data to be transmitted, it is determined that uplink transmission can be performed through SCell1, SCell2 and SCell3 to transmit the data to be transmitted; or through SCell3 and SCell4. Uplink transmission transmits the data to be transmitted. The total number of transmission carriers corresponding to SCell1, SCell2 and SCell3 is greater than the total number of transmission carriers corresponding to SCell3 and SCell4.

In order to reduce the number of carriers that need to be processed and improve resource utilization efficiency, the terminal equipment chooses to perform uplink transmission through SCell3 and SCell4.

In a specific implementation, after the terminal device receives the downlink control information, there may be no data to be transmitted.

If the terminal device does not perform uplink transmission on any of the configured N serving cells, the network device may think that the terminal device has not received the scheduling information or that the terminal device has performed uplink transmission, but the uplink data is lost during the transmission process, resulting in transmission failure. fail. At this time, the network device may send the data retransmission schedule again.

In order to prevent the terminal device from re-transmitting uplink, the terminal device can select a serving cell to send indication information, and the indication information can be used to indicate that there is currently no data to be transmitted. After receiving the indication information, the network device can learn that the terminal device currently does not have data to be transmitted, and therefore will not send a data retransmission schedule.

In this embodiment of the present invention, the indication information may be an uplink signal including a Padding buffer status report (Buffer Status Report, BSR).

The terminal device can select the serving cell with the smallest index number and transmit the uplink signal containing Padding BSR on the serving cell with the smallest index number.

For example, the terminal device chooses to transmit the uplink signal including Padding BSR on SCell1.

The terminal device can also select the serving cell with the largest index number and transmit the uplink signal containing Padding BSR on the serving cell with the largest index number.

For example, the terminal device chooses to transmit the uplink signal containing Padding BSR on SCell4.

The terminal device can also select the serving cell with the highest priority and transmit the uplink signal containing Padding BSR on the serving cell with the highest priority. The priorities corresponding to different serving cells may be preset, and the priorities corresponding to different serving cells may be different.

For example, set the priorities of SCell1 to SCell4 as follows: SCell1 has a higher priority than SCell2, SCell2 has a higher priority than SCell3, and SCell4 has the lowest priority. The terminal equipment chooses to transmit the uplink signal containing Padding BSR on SCell1.

The terminal device can also select the serving cell with the lowest priority and transmit the uplink signal containing Padding BSR on the SCell with the lowest priority.

Continuing the above example, SCell4 has the lowest priority, and the terminal device transmits the uplink signal containing Padding BSR on SCell4.

The terminal device can also randomly select a serving cell and transmit an uplink signal containing Padding BSR on the selected serving cell.

For example, if the SCell randomly selected by the terminal device is SCell2, the terminal device transmits the uplink signal containing Padding BSR on SCell2.

Through the indication information, the network device is informed that there is currently no data to be transmitted, and the network device does not need to send the retransmission schedule again, effectively avoiding the waste of uplink and downlink resources.

Referring to Figure 2, an uplink transmission device 20 in an embodiment of the present invention is shown, including: an acquisition unit 201 and a selection unit 202, wherein:

The acquisition unit 201 is used to acquire downlink control information, where the downlink control information indicates uplink transmission in N serving cells;

The selection unit 202 is configured to select M serving cells from the N serving cells for uplink transmission according to the current amount of data to be transmitted; N and M are both integers and 0 ≤M<N.

In a specific implementation, the specific execution process of the above-mentioned acquisition unit 201 and selection unit 202 may refer to steps 101 to 102, which will not be described again here.

In a specific implementation, the above-mentioned uplink transmission device 20 may correspond to a chip with a data processing function in the terminal device; or correspond to a chip module including a chip with a data processing function in the terminal device; or correspond to the terminal device.

In specific implementations, each module/unit included in each device and product described in the above embodiments may be a software module/unit or a hardware module/unit, or it may be partly a software module/unit and partly is a hardware module/unit.

For example, for various devices and products applied to or integrated into a chip, each module/unit included therein can be implemented in the form of hardware such as circuits, or at least some of the modules/units can be implemented in the form of a software program. The software program Running on the processor integrated inside the chip, the remaining (if any) modules/units can be implemented using circuits and other hardware methods; for various devices and products applied to or integrated into the chip module, each module/unit included in it can They are all implemented in the form of hardware such as circuits. Different modules/units can be located in the same component of the chip module (such as chips, circuit modules, etc.) or in different components. Alternatively, at least some modules/units can be implemented in the form of software programs. The software program runs on the processor integrated inside the chip module, and the remaining (if any) modules/units can be implemented using circuits and other hardware methods; for each device or product that is applied to or integrated into the terminal, each module it contains /Units can all be implemented in the form of hardware such as circuits, and different modules/units can be located in the same component (for example, chip, circuit module, etc.) or in different components within the terminal, or at least some of the modules/units can be implemented in the form of software programs. To implement, the software program runs on the processor integrated inside the terminal, and the remaining (if any) modules/units can be implemented using circuits and other hardware methods.

Embodiments of the present invention also provide a computer-readable storage medium. The computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, and a computer program is stored thereon. The computer program is processed by a processor. During runtime, the steps of the uplink transmission method provided in steps 101 to 102 are executed.

An embodiment of the present invention also provides an uplink transmission device, including a memory and a processor. The memory stores a computer program that can be run on the processor. When the processor runs the computer program, step 101 is executed. ~The steps of the uplink transmission method provided in step 102.

Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing relevant hardware through a program. The program can be stored in a computer-readable storage medium. The storage medium can include: ROM, RAM, magnetic disk or CD, etc.

Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims

An uplink transmission method, characterized by including:

Obtain downlink control information, which indicates uplink transmission in N serving cells;

According to the amount of data currently to be transmitted, M serving cells are selected from the N serving cells for uplink transmission; N and M are both integers and 0≤M<N.
The uplink transmission method according to claim 1, characterized in that the same physical resource block resources or non-identical physical resource block resources are used in the N serving cells for uplink transmission.
The uplink transmission method according to claim 2, wherein selecting M serving cells from the N serving cells for uplink transmission includes:

According to the preset selection rules, M serving cells are selected from the N serving cells for uplink transmission.
The uplink transmission method according to claim 3, wherein the preset selection rules include any of the following:

Select the top M serving cells with the smallest serving cell index number;

Select the top M serving cells with the largest serving cell index number;

After excluding serving cells configured to cancel uplink transmission from the N serving cells, select M serving cells from the remaining serving cells;

According to the preset priority, select the top M serving cells with the highest priority;

M serving cells are selected from a preconfigured serving cell list, and the cells in the serving cell list are serving cells that give priority to uplink transmission.
The uplink transmission method according to claim 2, wherein selecting M serving cells from the N serving cells for uplink transmission includes:

From the N serving cells, select a cell that can carry the data to be transmitted and transmit uplink The M serving cells with the smallest sum of carrier numbers perform uplink transmission.
The uplink transmission method according to claim 1, wherein M is 0 if the amount of data to be transmitted is 0 and the configuration allows cancellation of uplink transmission in multi-serving cell scheduling.
The uplink transmission method according to claim 1, further comprising:

If the amount of data to be transmitted is 0, select 1 serving cell from the N serving cells;

The selected serving cell is used to send indication information, where the indication information is used to indicate that there is currently no data to be transmitted.
The uplink transmission method according to claim 7, characterized in that using the selected serving cell to send the indication information includes:

Uplink information including a filled cache status report is sent on the selected serving cell.
An uplink transmission device, characterized by including:

An acquisition unit, configured to acquire downlink control information, where the downlink control information indicates uplink transmission in N serving cells;

A selection unit configured to select M serving cells from the N serving cells for uplink transmission according to the current amount of data to be transmitted; N and M are both integers and 0≤M<N.
A computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, on which a computer program is stored, characterized in that the computer program is executed when a processor is running The steps of the uplink transmission method according to any one of claims 1 to 8.
An uplink transmission device, including a memory and a processor. The memory stores a computer program that can be run on the processor. It is characterized in that when the processor runs the computer program, it executes claims 1 to 8. The steps of the uplink transmission method described in any one of the above.