CN115529626A - Data transmission method and device and computer readable storage medium - Google Patents

Data transmission method and device and computer readable storage medium Download PDF

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Publication number
CN115529626A
CN115529626A CN202110713538.7A CN202110713538A CN115529626A CN 115529626 A CN115529626 A CN 115529626A CN 202110713538 A CN202110713538 A CN 202110713538A CN 115529626 A CN115529626 A CN 115529626A
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Prior art keywords
data
target
data transmission
small
user equipment
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Chinese (zh)
Inventor
邓云
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Spreadtrum Communications Shanghai Co Ltd
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Spreadtrum Communications Shanghai Co Ltd
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Priority to CN202110713538.7A priority Critical patent/CN115529626A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0205—Traffic management, e.g. flow control or congestion control at the air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A data transmission method, a data transmission device and a computer-readable storage medium are provided, wherein the data transmission method comprises the following steps: acquiring data information output by target remote user equipment; the data information is related to target data corresponding to the target remote user equipment, and the target data is data required to be sent by the target remote user equipment; and determining whether to adopt a small data transmission mode to transmit the target data or not according to the data information. The scheme can reduce the cost of frequency spectrum resources and save the power consumption of the relay equipment.

Description

Data transmission method and device and computer readable storage medium
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a data transmission method and apparatus, and a computer-readable storage medium.
Background
In a sidelink relay (relay) scenario, a remote User Equipment (UE) accesses a network through a relay device to perform data (and/or signaling) transmission. The remote UE and the relay device may use a direct communication mechanism for signaling and data interaction. The interface between the remote UE and the relay device is a PC5 interface. The relay device may be a UE supporting a relay function, and the relay device may perform signaling and/or data interaction with the base station by using an existing Uu interface between the UE and the base station.
A relay device that generally serves a remote UE is in a Radio Resource Control (RRC) connected state. At this time, if the PC5 RRC connection has been established between the remote UE and the relay device, and the remote UE establishes a new service or expects to access the network, the relay device may forward the service request or access request of the remote UE to the base station through the current RRC connection.
To reduce the power consumption of the relay device, the relay device is allowed to enter an idle state or an Inactive state (Inactive). If a remote UE desires to access the network through the relay device to transmit data or signaling, the relay device generally needs to establish or recover an RRC connection, and then establishes a bearer through the relay device to transmit the data or signaling of the remote UE.
Small Data Transmission (SDT) mechanisms, including a random access-based Data Transmission mechanism and a Configuration Grant (CG) -based Data Transmission mechanism, are introduced in an existing new air interface (NR) system, and are used for an inactive UE (referred to herein as a non-remote UE). When the remote UE is in the inactive state, it does not perform data transmission with the network, and may periodically receive paging, and the network retains the RRC connection configuration, bearer configuration, security configuration, and S1 interface configuration, which are established by the UE. The remote UE may also save RRC connection configuration, bearer configuration, security configuration, and the like. When data is transmitted, the remote UE in the inactive state can restore the RRC connection through the RRC connection recovery procedure through the stored parameter configuration.
For the remote UE in the inactive state and the relay device in the inactive state, when the remote UE has data to transmit, the remote UE may send an access network request to the relay device through the PC5 interface, and after establishing the PC5 RRC connection, establish a data bearer of the direct link for transmitting the data to be transmitted to the relay device. When receiving the access request or data transmitted by the remote UE, the relay device initiates an RRC connection request or an RRC connection recovery request to the network, so as to quickly recover the RRC connection with the network.
However, the remote UE may only need to transmit a small amount of data or signaling, and if the relay device needs to establish an RRC connection or recover the RRC connection each time the relay device provides the relay service for the remote UE, the overhead of spectrum resources is large, and the power consumption of the relay device is high.
Disclosure of Invention
The embodiment of the invention solves the technical problems of higher frequency spectrum resource overhead and higher power consumption when the relay equipment provides the relay service for the remote UE.
To solve the foregoing technical problem, an embodiment of the present invention provides a data transmission method, including: acquiring data information output by target remote user equipment; the data information is related to target data corresponding to the target remote user equipment, and the target data is data required to be sent by the target remote user equipment; and determining whether to adopt a small data transmission mode to transmit the target data or not according to the data information.
Optionally, the data information includes a small data transmission instruction, where the small data transmission instruction is generated by the target remote ue after detecting that the target data meets a preset small data transmission trigger condition; the acquiring data information output by the target remote user equipment includes: and acquiring the small data transmission indication.
Optionally, the determining whether to transmit the target data in a small data transmission mode according to the data information includes: and determining to transmit the target data in a small data transmission mode according to the small data transmission indication.
Optionally, the acquiring data information output by the target remote user equipment includes: and acquiring the data volume of the target data output by the target remote user equipment.
Optionally, the acquiring the data volume of the target data output by the target remote user equipment includes: and receiving the data volume of the target data sent by the target remote user equipment.
Optionally, before receiving the data amount of the target data sent by the target remote user equipment, the method further includes: issuing a cache reporting configuration to the target remote user equipment; the buffer reporting configuration is used for indicating the target remote user equipment to report the data volume of the target data.
Optionally, the determining whether to transmit the target data in a small data transmission mode according to the data information includes: if the data volume of the target data is not larger than a preset threshold value and no data to be transmitted exists, determining to transmit the target data by adopting a small data transmission mode; and if the target data to be transmitted exists, and the sum of the data volume of the target data and the data volume of the data to be transmitted is not larger than the preset threshold value, determining to transmit the target data by adopting a small data transmission mode.
Optionally, when the number of the target remote user equipments is multiple, the data size of the target data is: the sum of the data amount of the data required to be transmitted by the plurality of target remote user equipments.
Optionally, the acquiring data information output by the target remote user equipment includes: and receiving target data output by the target remote user equipment.
Optionally, the determining whether to transmit the target data in a small data transmission mode according to the data information includes: acquiring the data volume of the target data; if the data volume of the target data is not larger than a preset threshold value and no data to be transmitted exists, determining to transmit the target data by adopting a small data transmission mode; and if the target data to be transmitted exists, and the sum of the data volume of the target data and the data volume of the data to be transmitted is not larger than the preset threshold value, determining to transmit the target data by adopting a small data transmission mode.
Optionally, when the number of the target remote user equipments is multiple, the acquiring the data size of the target data includes: and receiving data output by the target remote user equipment, and acquiring the sum of the data amount of the target remote equipment.
An embodiment of the present invention further provides a data transmission apparatus, including: the first acquisition unit is used for acquiring data information output by the target remote user equipment; the data information is related to target data corresponding to the target remote user equipment, and the target data is data required to be sent by the target remote user equipment; a determining unit, configured to determine whether to transmit the target data in a small data transmission mode according to the data information.
The embodiment of the present invention further provides a data transmission device, which includes a memory and a processor, where the memory stores a computer program that can be run on the processor, and the processor executes the steps of the data transmission method when running the computer program.
The embodiment of the invention also provides another data transmission method, which comprises the following steps: acquiring target data to be transmitted; and if the target data meets a preset small data transmission triggering condition, outputting a small data transmission instruction, wherein the small data transmission instruction is used for instructing the corresponding relay equipment to transmit the target data in a small data transmission mode.
An embodiment of the present invention further provides another data transmission apparatus, including: the second acquisition unit is used for acquiring target data to be transmitted; and the output unit is used for outputting a small data transmission instruction when the target data meets a preset small data transmission triggering condition, wherein the small data transmission instruction is used for instructing the corresponding relay equipment to transmit the target data in a small data transmission mode.
The embodiment of the present invention further provides a data transmission device, which includes a memory and a processor, where the memory stores a computer program that can be run on the processor, and the processor executes the steps of the data transmission method when running the computer program.
An embodiment of the present invention further provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, and has a computer program stored thereon, where the computer program is executed by a processor to perform the steps of any of the above-mentioned data transmission methods.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
the relay equipment acquires data information output by the target remote user equipment and determines whether to adopt a small data transmission mode to transmit target data of the target remote UE according to the data information. And if the relay equipment determines to adopt the small data transmission mode, transmitting the target data of the target remote UE by adopting the small data transmission mode. Therefore, when the relay device provides the relay service for the target remote user equipment, if the small data transmission mode is determined to be adopted, the RRC connection does not need to be recovered, so that the overhead of frequency spectrum resources can be reduced, and the power consumption of the relay device can be reduced.
Drawings
Fig. 1 is a flowchart of a data transmission method in an embodiment of the present invention;
FIG. 2 is a flow chart of another method of data transmission in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a data transmission apparatus in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another data transmission apparatus in an embodiment of the present invention.
Detailed Description
The small data transmission mechanism includes a mechanism of transmitting small data through a random access procedure and a mechanism of transmitting small data based on CG. In the embodiment of the present invention, for convenience of description, the above two mechanisms for transmitting small data are collectively referred to as a small data transmission mechanism. In fact, the small Data transmission mechanism can be used for transmitting Data (i.e. Data transmitted on a Data Radio Bearer (DRB)) as well as signaling (i.e. content transmitted on a Signaling Radio Bearer (SRB)).
For the remote UE in the inactive state and the relay device in the inactive state, when the remote UE has data to transmit, the remote UE may send an access network request to the relay device through the PC5 interface, and after establishing the PC5 RRC connection, establish a data bearer of the direct link for transmitting the data to be transmitted to the relay device. When receiving an access Request or data transmitted by a remote UE, a relay device initiates an RRC connection Request or an RRC connection recovery Request (RRC Resume Request) to a network, so as to quickly recover an RRC connection with the network.
However, the remote UE may only need to transmit a small amount of data or signaling, and if the relay device needs to establish an RRC connection or recover the RRC connection each time the relay device provides the relay service for the remote UE, the amount of signaling interaction is large, the spectrum resource overhead is large, and the power consumption of the relay device is high.
In the embodiment of the present invention, if the relay device determines to adopt the small data transmission mode, the relay device transmits the target data of the target remote UE by adopting the small data transmission mode. Therefore, when the relay device provides the relay service for the target remote user equipment, if the small data transmission mode is determined to be adopted, the RRC connection does not need to be recovered, so that the overhead of the spectrum resource can be reduced, and the power consumption of the relay device can be saved.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
An embodiment of the present invention provides a data transmission method, which is described below with reference to fig. 1 through specific steps.
In the embodiment of the present invention, the data transmission method provided in the following steps S101 to S102 may be performed by the relay device. Specifically, the following steps S101 to S102 may be performed by a baseband chip in the relay device or a chip module including the baseband chip in the relay device.
In specific implementation, the data transmission method provided by the embodiment of the invention can be used for an application scenario in which the relay device is in an inactive state.
In a specific application, when the relay device is within the coverage of the serving cell, the relay device may provide a relay service for other remote UEs. The relay device may periodically broadcast a Discovery (Discovery) message to the periphery, so that the peripheral remote UE can discover the relay device, and the remote UE may obtain information of a serving cell accessed by the relay device through the Discovery message, such as an identifier of the serving cell, a Public Land Mobile Network (PLMN) identifier to which the serving cell belongs, and the like. The discovery information may also carry other information of the serving cell to which the relay device is connected, which is not described in detail in this embodiment of the present invention.
When the remote UE discovers the relay device and desires to access the network through the relay device, the remote UE may establish direct communication with the relay device, such as establishing a PC5 RRC connection, and then indicate to the relay device through the PC5 RRC connection that access to the network is required. The relay device in the connected state can directly send an access request of the remote UE to the serving cell, and can further establish a wireless data bearer, so that the remote UE and the serving cell interact data through the relay device. After the relay device forwards data to the remote UE, the serving cell may control the relay device and the remote UE to enter an Inactive (Inactive) state if there is no data transmission within a period of time. The serving cell may send a Radio Resource Control (RRC) release message to the remote UE through the relay device, and trigger the remote UE to enter an inactive state; and then sending an RRC release message to the relay equipment to trigger the relay equipment to enter an inactive state.
Step S101, data information output by target remote user equipment is obtained.
In a specific implementation, data information output by a target Remote User Equipment (Remote User Equipment, remote UE) may be related to target data of the target Remote UE, and the target data may be data that needs to be sent by the target Remote UE.
In the embodiment of the present invention, the target remote UE may send the data information to the relay device. The relay device may receive data information transmitted by the target remote UE.
In the embodiment of the present invention, if no special description is provided, the target remote UE may access the serving cell through the relay device, and the target remote UE may establish a communication connection with the relay device through the PC5 interface.
And step S102, determining whether to adopt a small data transmission mode to transmit the target data or not according to the data information.
In a specific implementation, the relay device may determine whether to transmit the target data in the small data transmission mode according to data information output by the target remote UE.
In a particular implementation, the data information may include a small data transmission indication.
In the embodiment of the present invention, after the target remote UE and the relay device enter the inactive state, the target remote UE may need to perform data transmission. For example, the target remote UE sends an access network request to the relay device over the PC5 interface. When the target remote UE determines that data transmission is required, the target data to be transmitted may be obtained, and it is determined whether the target data to be transmitted satisfies a preset small data transmission trigger condition. And if the target data meets the preset small data transmission triggering condition, the target remote UE can output a small data transmission instruction. The small data transmission indication may be used to instruct a relay device corresponding to the target remote UE to transmit the target data in the small data transmission mode.
In the embodiment of the present invention, the preset small data transmission triggering condition may be: the data quantity corresponding to the data needing to be transmitted is smaller than a preset threshold value. The preset threshold may be configured by the network side, and the size of the preset threshold may be different for different application scenarios. For example, different thresholds may be set on the network side for different signal conditions in which the relay device is located.
The target remote end UE can acquire the data volume corresponding to the target data after the target remote end UE has data to upload and the access layer acquires the target data. When the target remote UE detects that the data amount corresponding to the target data is less than or equal to the preset threshold, that is, when the target remote UE detects that the target data meets the preset small data transmission triggering condition, the small data transmission indication may be generated.
In the embodiment of the present invention, the target remote UE may send the small data transmission indication to the relay device through the PC5 interface. After receiving the small data transmission indication, the relay device in the inactive state can transmit the target data sent by the target remote UE to the serving cell in the small data transmission mode. When the relay device in the inactive state transmits data to the serving cell in the small data transmission mode, the relay device does not need to enter the connected state, that is, the RRC connection recovery is not needed, so that the power consumption of the relay device can be effectively reduced.
That is, when the target remote UE detects that the data amount of the target data to be transmitted is smaller than the preset threshold, it may be determined that the data amount of the target data to be transmitted is smaller. The target remote UE sends a small data transmission instruction to the relay equipment through the PC5 interface so as to inform the relay equipment that the data volume of the target data transmitted this time is small. The relay device may transmit the target data directly in the small data transmission mode after receiving the small data transmission instruction.
In the embodiment of the present invention, after detecting that the target data meets the preset small data transmission triggering condition, the target remote UE may carry the small data transmission indication by reserving bits or by adding extension bits in a layer 2 header (header) containing the target data, for example, by using the extension bits. After receiving the target data, the relay device may detect whether the target packet carries a small data transmission instruction. If the extension bit is detected to exist in the target data packet, it can be determined that the target remote UE has sent a small data transmission indication, that is, it is determined that the target data can be transmitted in a small data transmission mode.
In the embodiment of the present invention, the small data transmission indication may also be indicated by the value of the extension bit. For example, when the extension bit takes a value of 1, the representation target remote UE outputs a small data transmission indication; and when the value of the extension bit is 0, the representation target far-end UE does not output a small data transmission indication.
It can be understood that if the extension bit is added to the destination data packet, that is, the extension bit is added to the header of the destination data packet, the relay device may remove the extension bit from the destination data packet when transmitting the destination data to the serving cell.
In the embodiment of the present invention, after detecting that the target data meets the preset small data transmission triggering condition, the target remote UE may also send a small data transmission indication to the relay device through the PC5 interface signaling, for example, add a cell in the existing PC5 interface signaling to indicate the relay device to perform small data transmission. The processes of the target remote UE transmitting the small data transmission indication to the relay equipment and transmitting the target data are mutually independent. That is, the target remote UE may first send the small data transmission indication to the relay device, and then send the target data to the relay device; alternatively, the target remote UE may first transmit the target data to the relay device and then transmit the small data transmission indication to the relay device.
In a specific implementation, the target remote UE may know in advance whether the serving cell supports the small data transmission mechanism. The serving cell may broadcast system messages, which may be forwarded to the target remote UE via the relay device. In the system message, a small data transmission mechanism based on random access can be configured. After receiving the system message, the target remote UE can know that the serving cell configures the small data transmission mechanism.
The serving cell may also configure the relay device with a small data transmission mechanism based on the configuration grant. The relay device may indicate to the target remote UE that the serving cell is configured with a CG-based small data transmission mechanism.
It is to be understood that the target remote UE may also know whether the serving cell is configured with the small data transmission mechanism through other manners.
In the embodiment of the present invention, when the data information includes the small data transmission mode, if the number of the target remote UEs performing data transmission simultaneously with the relay device is two or more, the total data amount of the target data corresponding to all the target remote UEs may be large, and the total data amount of the target data corresponding to all the target remote UEs received by the relay device may be larger than a preset threshold, so that the relay device cannot transmit the target data in the small data transmission mode. If the relay device receives data sent by a plurality of target remote UEs at the same time (within a short period of time, if the relay device receives data of other target remote UEs before the relay device does not send the data of the target remote UEs to the serving cell, the data received within the period of time are all referred to as being received at the same time), and the sum of the target data corresponding to the plurality of target remote UEs is still not greater than the preset threshold, the relay device may send the target data in a small data transmission mode.
In this case, if the number of the target remote UEs performing data transmission simultaneously with the relay device is two or more, the relay device may first switch from the inactive state to the connected state, and then send target data corresponding to all the target remote UEs to the serving cell.
In a particular implementation, the data information may also include a data volume of the target data.
In the embodiment of the present invention, when the target remote UE is in the inactive state, if there is target data that needs to be transmitted, the data size of the target data may be obtained, and the data size of the target data is indicated to the relay device, so that the relay device can obtain the data size of the target data. The relay apparatus may determine whether to execute the small data transmission mode according to the data amount of the target data and the data amount of the data to be transmitted of the relay apparatus itself.
In the embodiment of the present invention, the target remote UE may be configured in advance to a data size of the target data to be transmitted. In the embodiment of the present invention, the target remote UE may receive, in advance, a Buffer Report configuration sent by the relay device, where the Buffer Report configuration is used to instruct the target remote UE to send a Buffer Status Report (BSR) to the relay device. After receiving the BSR reported by the target device, the relay device may obtain the data amount of the target data to be transmitted by the target remote UE.
In the embodiment of the present invention, if there is only one target remote UE that needs to perform data transmission, the target remote UE indicates the data size of the target data to the relay device. If the relay equipment does not have the data to be transmitted, the relay equipment judges whether to execute a small data transmission mode or not according to the data volume of the target data; if the relay equipment has the data to be transmitted, the relay equipment judges whether to execute a small data transmission mode according to the sum of the data quantity of the target data and the data quantity of the data to be transmitted.
If there are multiple target remote UEs that need to perform data transmission, the multiple target remote UEs each indicate the data amount of their respective corresponding target data to the relay device. If the relay equipment does not have the data to be transmitted, the relay equipment judges whether to execute a small data transmission mode or not according to the data volume of the target data corresponding to all the target remote UE; if the relay equipment has the data to be transmitted, the relay equipment judges whether to execute a small data transmission mode according to the sum of the data quantity of the target data corresponding to all the target remote UE and the data quantity of the data to be transmitted.
For example, there are 2 target remote UEs that need to perform data transmission, which are the target remote UE1 and the target remote UE2 in sequence. The target remote UE1 and the target remote UE2 both indicate the data amount of the corresponding target data to the relay device. The relay device does not have to-be-transmitted data, and the relay device obtains the sum of the data volume of the target data corresponding to the target remote UE1 and the data volume of the target data corresponding to the target remote UE2, and determines whether to execute a small data transmission mode.
In this embodiment of the present invention, the relay device determines whether to execute the small data transmission mode, and may: the relay equipment judges whether the total data volume to be sent to the service cell is not greater than a preset threshold value or not; the preset threshold may be configured by the network side, and the size of the preset threshold may be different for different application scenarios. If the relay device judges that the total data volume to be sent to the service cell is not larger than a preset threshold value, the fact that the data volume of the relay device to be sent to the service cell is small currently means that a small data transmission mode can be executed; if the relay device judges that the total data volume to be sent to the service cell is larger than the preset threshold value, it represents that the data volume to be sent to the service cell by the relay device is large and the small data transmission mode cannot be executed.
In the embodiment of the present invention, if there is only one target remote UE that needs to perform data transmission and the relay device itself does not have data to be transmitted, the total data amount to be sent to the serving cell by the relay device is: and the target remote UE corresponds to the data volume of the target data.
If only one target remote UE which needs to perform data transmission exists and the relay device itself has data to be transmitted, the total data amount to be sent to the serving cell by the relay device is: and the sum of the data volume of the target data corresponding to the target remote UE and the data volume of the data to be transmitted by the relay equipment.
If there are multiple target remote UEs that need to perform data transmission and the relay device itself does not have data to be transmitted, the total data amount to be sent to the serving cell by the relay device is: and the sum of the data quantity of the target data corresponding to the target remote UE.
If there are only a plurality of target remote UEs that need to perform data transmission and the relay device itself has data to be transmitted, the total data amount to be sent to the serving cell by the relay device is: the sum of the data amount of the target data corresponding to the target remote UEs and the sum of the data amount of the data to be transmitted by the relay equipment.
In a specific implementation, the relay device may send the buffer report configuration to the target remote UE when determining that the serving cell configures the small data transmission mechanism. If the relay device determines that the serving cell does not support the small data transmission mechanism or the serving cell does not configure the small data transmission mechanism, the relay device may not need to send the buffer report configuration to the target remote UE, that is, the target remote UE does not need to send the data size of the target data to be transmitted to the relay device.
In a specific implementation, the target remote UE may also directly transmit the target data to the relay device. The relay device may receive target data transmitted by the target remote UE. After determining that the data transmission is completed, the target remote UE may indicate to the relay device that the data transmission is completed. The relay device may obtain a data amount corresponding to the received target data according to the received target data.
If the relay equipment does not have the data to be transmitted and the data volume of the target data is not larger than a preset threshold value, the relay equipment can determine to transmit the target data in a small data transmission mode; if the relay device has the data to be transmitted and the sum of the data amount of the data to be transmitted and the data amount of the target data is not larger than the preset threshold value, the relay device can determine to transmit the target data by adopting a small data transmission mode.
Therefore, the relay equipment acquires the data information output by the target remote user equipment and determines whether to adopt a small data transmission mode to transmit the target data of the target remote UE according to the data information. And if the relay equipment determines to adopt the small data transmission mode, transmitting the target data by adopting the small data transmission mode. Therefore, when the relay device provides the relay service for the target remote user equipment, if the small data transmission mode is determined to be adopted, the RRC connection does not need to be recovered, so that the overhead of frequency spectrum resources can be reduced, and the power consumption of the relay device can be reduced.
An embodiment of the present invention further provides another data transmission method, and details are described below with reference to fig. 2 through specific steps.
In the embodiment of the present invention, the data transmission method provided in the following steps S101 to S102 may be executed by the remote UE. Specifically, the following steps S101 to S102 may be performed by a baseband chip in the remote UE, or a chip module including the baseband chip in the remote UE.
Step S201, target data to be transmitted is obtained.
Step S202, if the target data meets the preset small data transmission triggering condition, outputting a small data transmission instruction.
In a specific implementation, after the target remote UE and the relay device enter the inactive state respectively, the target remote UE may need to perform data transmission. For example, the target remote UE sends an access network request to the relay device over the PC5 interface. When the target remote UE determines that data transmission is required, the target data to be transmitted may be obtained, and it is determined whether the target data to be transmitted satisfies a preset small data transmission trigger condition. And if the target data meets the preset small data transmission triggering condition, the target remote UE can output a small data transmission instruction.
In the embodiment of the present invention, the small data transmission indication may be used to instruct the relay device corresponding to the target remote UE to transmit the target data in the small data transmission mode.
In a specific implementation, the preset small data transmission triggering condition may be: the data quantity corresponding to the data needing to be transmitted is smaller than a preset threshold value. The preset threshold may be configured by the network side, and the size of the preset threshold may be different for different application scenarios.
After the target remote UE acquires the target data, the data amount corresponding to the target data may be acquired. When the target remote UE detects that the data amount corresponding to the target data is not greater than the preset threshold, that is, when the target UE detects that the target data satisfies the preset small data transmission triggering condition, the small data transmission instruction may be generated.
In the embodiment of the present invention, the target remote UE may send the small data transmission indication to the relay device through the PC5 interface. After receiving the small data transmission indication, the relay device in the inactive state can transmit the target data sent by the target remote UE to the serving cell in the small data transmission mode. When the relay device in the inactive state transmits data to the serving cell in the small data transmission mode, the relay device does not need to enter a connected state, that is, the RRC connection is not required to be restored or reestablished, so that the power consumption of the relay device can be effectively reduced.
That is to say, in the embodiment of the present invention, when the target remote UE detects that the data amount of the target data to be transmitted is not greater than the preset threshold, it may be determined that the data amount of the target data to be transmitted currently is small. The target remote UE sends a small data transmission instruction to the relay equipment through the PC5 interface so as to inform the relay equipment that the data volume of the target data transmitted this time is less. The relay device may transmit the target data directly in the small data transmission mode after receiving the small data transmission instruction.
In a specific implementation, after detecting that the target data meets the preset small data transmission triggering condition, the target remote UE may adopt a reserved bit or add an extension bit in a header containing the target data packet, and carry the small data transmission indication through the reserved bit or the extension bit. The relay device may detect whether the target data indicates small data transmission after receiving the target data. If the small data transmission indication is detected, it is determined that the target data can be transmitted in the small data transmission mode.
In a specific implementation, the small data transmission indication may also be indicated by the value of the extension bit. For example, when the extension bit takes a value of 1, the representation target remote UE outputs a small data transmission indication; and when the value of the extension bit is 0, the representation target far-end UE does not output a small data transmission indication.
It is to be understood that if the extension bit is added to the header containing the target data packet, the relay device may remove the extension bit in the target data when transmitting the target data to the serving cell.
In specific implementation, after detecting that the target data meets the preset small data transmission triggering condition, the target remote UE may also send a small data transmission indication to the relay device through the PC5 interface signaling. The processes of the target remote UE transmitting the small data transmission indication to the relay equipment and transmitting the target data are mutually independent. That is, the target remote UE may first send the small data transmission indication to the relay device, and then send the target data to the relay device; alternatively, the target remote UE may send the target data to the relay device first, and then send the small data transmission instruction to the relay device.
In the embodiment of the present invention, the target remote UE may know in advance whether the serving cell supports a small data transmission mechanism. The serving cell may broadcast system messages, which may be forwarded to the target remote UE via the relay device. In the system message, a small data transmission mechanism based on random access can be configured. After receiving the system message, the target remote UE can know that the serving cell configures the small data transmission mechanism.
The serving cell may also configure the relay device with a small data transmission mechanism based on a Configured Grant (CG). The relay device may indicate to the target remote UE that the serving cell is configured with a CG-based small data transmission mechanism.
It is to be understood that the target remote UE may also know whether the serving cell is configured with the small data transmission mechanism through other manners.
In the embodiment of the present invention, if the number of the target remote UEs performing data transmission simultaneously with the relay device is two or more, the total data amount of the target data corresponding to all the target remote UEs may be large, and the total data amount of the target data corresponding to all the target remote UEs received by the relay device may be larger than a preset threshold, so that the relay device cannot transmit the target data in the small data transmission mode.
In this case, if the number of the target remote UEs performing data transmission simultaneously with the relay device is two or more, the relay device may first switch from the inactive state to the connected state, and then send target data corresponding to all the target remote UEs to the serving cell.
Therefore, the target remote UE can output the small data transmission instruction to the relay equipment when determining that the target data to be transmitted meets the preset small data transmission triggering condition, so that the relay equipment can transmit the target data in the small data transmission mode. When the relay device in the inactive state transmits data to the serving cell in the small data transmission mode, the relay device does not need to enter a connected state, that is, the RRC connection is not required to be restored or reestablished, so that the power consumption of the relay device can be effectively reduced.
Referring to fig. 3, a data transmission apparatus 30 in an embodiment of the present invention is shown, including: a first obtaining unit 301 and a determining unit 302, wherein:
a first obtaining unit 301, configured to obtain data information output by a target remote user equipment; the data information is related to target data corresponding to the target remote user equipment, and the target data is data required to be sent by the target remote user equipment;
a determining unit 302, configured to determine whether to transmit the target data in a small data transmission mode according to the data information.
In a specific implementation, the specific execution processes of the first obtaining unit 301 and the determining unit 302 may refer to the steps S101 to S102, which is not described in detail in this embodiment of the present invention.
In a specific implementation, the data transmission device 30 may correspond to a chip having a data processing function in the relay device, such as a baseband chip; or to a chip module including a chip having a data processing function in the relay device, or to the relay device.
Referring to fig. 4, another data transmission apparatus 40 in the embodiment of the present invention is provided, including: a second obtaining unit 401 and an output unit 402, wherein:
a second obtaining unit 401, configured to obtain target data to be transmitted;
an output unit 402, configured to output a small data transmission instruction when the target data meets a preset small data transmission trigger condition, where the small data transmission instruction is used to instruct a corresponding relay device to transmit the target data in a small data transmission mode.
In a specific implementation, the data transmission device 40 may correspond to a chip having a data processing function in the relay device, such as a baseband chip; or to a chip module including a chip having a data processing function in the relay device, or to the relay device.
An embodiment of the present invention further provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, and has a computer program stored thereon, where the computer program is executed by a processor to perform the steps of the data transmission method provided in any of the above embodiments.
The embodiment of the present invention further provides a data transmission device, which includes a memory and a processor, where the memory stores a computer program that can be run on the processor, and the processor executes the steps of the data transmission method provided in the above steps S101 to S102 when running the computer program.
The embodiment of the present invention further provides another data transmission device, which includes a memory and a processor, where the memory stores a computer program that can be executed on the processor, and the processor executes the steps of the data transmission method provided in the above steps S201 to S202 when executing the computer program.
In a specific implementation, each module/unit included in each apparatus and product described in the foregoing embodiments may be a software module/unit, may also be a hardware module/unit, or may also be a part of a software module/unit and a part of a hardware module/unit.
For example, for each apparatus and product applied to or integrated into a chip, each module/unit included in the apparatus and product may all be implemented by hardware such as a circuit, or at least a part of the modules/units may be implemented by a software program running on a processor integrated within the chip, and the remaining (if any) part of the modules/units may be implemented by hardware such as a circuit; for each device and product applied to or integrated with the chip module, each module/unit included in the device and product may be implemented by hardware such as a circuit, and different modules/units may be located in the same component (e.g., a chip, a circuit module, etc.) or different components of the chip module, or at least part of the modules/units may be implemented by a software program running on a processor integrated inside the chip module, and the rest (if any) part of the modules/units may be implemented by hardware such as a circuit; for each device and product applied to or integrated in the terminal, each module/unit included in the device and product may be implemented by hardware such as a circuit, different modules/units may be located in the same component (e.g., a chip, a circuit module, etc.) or different components in the terminal, or at least part of the modules/units may be implemented by a software program running on a processor integrated in the terminal, and the rest (if any) part of the modules/units may be implemented by hardware such as a circuit.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by instructing the relevant hardware through a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (17)

1. A data transmission method is applied to relay equipment, and is characterized by comprising the following steps:
acquiring data information output by target remote user equipment; the data information is related to target data corresponding to the target remote user equipment, and the target data is data required to be sent by the target remote user equipment;
and determining whether to adopt a small data transmission mode to transmit the target data or not according to the data information.
2. The data transmission method according to claim 1, wherein the data information includes a small data transmission indication, the small data transmission indication being generated after the target remote ue detects that the target data satisfies a preset small data transmission trigger condition; the acquiring data information output by the target remote user equipment includes:
and acquiring the small data transmission indication.
3. The data transmission method of claim 2, wherein the determining whether to transmit the target data in a small data transmission mode according to the data information comprises:
and determining to adopt a small data transmission mode to transmit the target data according to the small data transmission indication.
4. The data transmission method as claimed in claim 1, wherein said obtaining the data information output by the target remote ue comprises:
and acquiring the data volume of the target data output by the target remote user equipment.
5. The data transmission method according to claim 4, wherein the obtaining of the data amount of the target data output by the target remote user equipment comprises:
and receiving the data volume of the target data sent by the target remote user equipment.
6. The data transmission method according to claim 5, further comprising, before receiving the data amount of the target data transmitted by the target remote user equipment:
issuing a cache reporting configuration to the target remote user equipment; the buffer reporting configuration is used for indicating the target remote user equipment to report the data volume of the target data.
7. The data transmission method according to any one of claims 4 to 6, wherein the determining whether to transmit the target data in a small data transmission mode according to the data information comprises:
if the data volume of the target data is not larger than a preset threshold value and no data to be transmitted exists, determining to transmit the target data by adopting a small data transmission mode;
and if the target data to be transmitted exists, and the sum of the data volume of the target data and the data volume of the data to be transmitted is not larger than the preset threshold value, determining to transmit the target data by adopting a small data transmission mode.
8. The data transmission method according to claim 7, wherein when there are a plurality of target remote ue, the data amount of the target data is: the sum of the data amount of the data required to be transmitted by the plurality of target remote user equipments.
9. The data transmission method according to claim 1, wherein the acquiring the data information output by the target remote user equipment includes:
and receiving target data output by the target remote user equipment.
10. The data transmission method of claim 9, wherein the determining whether to transmit the target data in a small data transmission mode according to the data information comprises:
acquiring the data volume of the target data;
if the data volume of the target data is not larger than a preset threshold value and no data to be transmitted exists, determining to transmit the target data by adopting a small data transmission mode;
and if the target data to be transmitted exists, and the sum of the data volume of the target data and the data volume of the data to be transmitted is not larger than the preset threshold value, determining to transmit the target data by adopting a small data transmission mode.
11. The data transmission method according to claim 10, wherein when there are a plurality of target remote ue, the obtaining the data size of the target data includes: and receiving data output by the target remote user equipment, and acquiring the sum of the data volume of the target remote user equipment.
12. A method of data transmission, comprising:
acquiring target data to be transmitted;
and if the target data meets a preset small data transmission triggering condition, outputting a small data transmission instruction, wherein the small data transmission instruction is used for instructing the corresponding relay equipment to transmit the target data in a small data transmission mode.
13. A data transmission apparatus, comprising:
the first acquisition unit is used for acquiring data information output by the target remote user equipment; the data information is related to target data corresponding to the target remote user equipment, and the target data is data required to be sent by the target remote user equipment;
and the determining unit is used for determining whether the target data is transmitted in a small data transmission mode or not according to the data information.
14. A data transmission apparatus, comprising:
the second acquisition unit is used for acquiring target data to be transmitted;
and the output unit is used for outputting a small data transmission instruction when the target data meets a preset small data transmission triggering condition, wherein the small data transmission instruction is used for instructing the corresponding relay equipment to transmit the target data in a small data transmission mode.
15. A computer-readable storage medium, being a non-volatile storage medium or a non-transitory storage medium, having a computer program stored thereon, wherein the computer program, when executed by a processor, performs the steps of the data transmission method according to any one of claims 1 to 12.
16. A data transmission device comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the processor, when executing the computer program, performs the steps of the data transmission method of any one of claims 1 to 11.
17. A data transmission device comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the processor executes the computer program to perform the steps of the data transmission method as claimed in claim 12.
CN202110713538.7A 2021-06-25 2021-06-25 Data transmission method and device and computer readable storage medium Pending CN115529626A (en)

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CN202110713538.7A CN115529626A (en) 2021-06-25 2021-06-25 Data transmission method and device and computer readable storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110713538.7A CN115529626A (en) 2021-06-25 2021-06-25 Data transmission method and device and computer readable storage medium

Publications (1)

Publication Number Publication Date
CN115529626A true CN115529626A (en) 2022-12-27

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