CN118140572A

CN118140572A - Uplink resource selection method, device, equipment and storage medium

Info

Publication number: CN118140572A
Application number: CN202180103234.7A
Authority: CN
Inventors: 林雪; 胡奕; 李海涛; 尤心
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2024-06-04
Also published as: WO2023115299A1

Abstract

The application discloses a method, a device, equipment and a storage medium for selecting uplink resources, and relates to the field of wireless communication. The method is applied to the terminal equipment and comprises the following steps: receiving a paging message, wherein the paging message comprises first indication information, the first indication information is used for indicating that a network equipment side triggers an MT-SDT process or is used for indicating that downlink data arrives currently, and the RB of the downlink data is configured to support triggering of SDT; responding to the paging message, preferentially selecting a first type of resource, and initiating an uplink transmission process; wherein the first type of resource comprises one of: CG-SDT resources, CFRA resources, and random access resources dedicated to responding to the MT-SDT.

Description

Uplink resource selection method, device, equipment and storage medium

Technical Field

The present application relates to the field of wireless communications, and in particular, to a method, an apparatus, a device, and a storage medium for selecting uplink resources.

Background

In the rrc_inactive state (i.e., the RRC INACTIVE state), the terminal device supports data Transmission through small data Transmission (SMALL DATA Transmission, SDT).

The SDT may be an SDT procedure initiated by the network device side, i.e. a downlink TERMINATED SMALL DATA Transmission (MT-SDT). The related art has not provided a solution how the terminal device selects uplink resources when performing the MT-SDT procedure.

Disclosure of Invention

The embodiment of the application provides an uplink resource selection method, device, equipment and storage medium. The technical scheme is as follows:

according to one aspect of the present application, there is provided an uplink resource selection method, the method including:

receiving a paging message, wherein the paging message comprises first indication information, the first indication information is used for indicating that a network device side triggers an MT-SDT process or is used for indicating that downlink data arrives currently, and a Radio Bearer (RB) of the downlink data is configured to support triggering of the SDT;

responding to the paging message, preferentially selecting a first type of resource, and initiating an uplink transmission process;

Wherein the first type of resource comprises one of: CG-SDT resources, non-contention random access (Contention Free Random Access, CFRA) resources, and random access resources dedicated to responding to the MT-SDT.

sending a paging message, wherein the paging message comprises first indication information, the first indication information is used for indicating that a network equipment side triggers an MT-SDT process or is used for indicating that downlink data arrives currently, and the RB of the downlink data is configured to support triggering of SDT;

The paging message is used for triggering the terminal equipment to initiate an uplink transmission process, and the terminal equipment preferentially selects a first type of resource to initiate the uplink transmission process; the first type of resource comprises one of: CG-SDT resources, CFRA resources, and random access resources dedicated to responding to the MT-SDT.

According to an aspect of the present application, there is provided an uplink resource selection apparatus, the apparatus including:

a message receiving module and a resource selecting module;

The message receiving module is configured to receive a paging message, where the paging message includes first indication information, where the first indication information is used to instruct a network device side to trigger an MT-SDT procedure, or is used to instruct that downlink data arrives currently, and an RB of the downlink data is configured to support triggering SDT;

The resource selection module is used for responding to the paging message, preferentially selecting the first type of resources and initiating an uplink transmission process;

Wherein the first type of resource comprises one of: CG-SDT resources, CFRA resources, and random access resources dedicated to responding to the MT-SDT.

According to an aspect of the present application, there is provided an uplink resource selection apparatus, the apparatus including: a message sending module;

the message sending module is configured to send a paging message, where the paging message includes first indication information, where the first indication information is used to indicate that the device side triggers an MT-SDT procedure, or is used to indicate that downlink data arrives currently, and an RB of the downlink data is configured to support triggering SDT;

According to an aspect of the present application, there is provided a terminal device including: a transceiver and a processor; wherein,

The transceiver is configured to receive a paging message, where the paging message includes first indication information, where the first indication information is used to instruct a network device side to trigger an MT-SDT procedure, or is used to indicate that downlink data arrives currently, and an RB of the downlink data is configured to support triggering SDT;

The processor is used for responding to the paging message, preferentially selecting the first type of resources and initiating an uplink transmission process;

According to an aspect of the present application, there is provided a network device comprising: a transceiver; wherein,

The transceiver is configured to send a paging message, where the paging message includes first indication information, where the first indication information is used to instruct a network device side to trigger a downlink small data transmission MT-SDT process, or is used to indicate that downlink data arrives currently, and RB of the downlink data is configured to support triggering SDT;

According to one aspect of the present application, there is provided a computer readable storage medium having stored therein executable instructions that are loaded and executed by a processor to implement the uplink resource selection method as described in the above aspect.

According to an aspect of an embodiment of the present application, there is provided a chip, including programmable logic circuits and/or program instructions, for implementing the uplink resource selection method described in the above aspect when the chip is run on a computer device.

According to an aspect of the present application, there is provided a computer program product which, when run on a processor of a computer device, causes the computer device to perform the uplink resource selection method of the above aspect.

The technical scheme provided by the embodiment of the application at least comprises the following beneficial effects:

in the case that the network device indicates, through the paging message, that the terminal device is ready to start executing the MT-SDT related procedure, it is clear how the terminal device selects the uplink resource to respond to the paging at the network device side after receiving the paging message.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a flow chart of advanced data transfer provided by an exemplary embodiment of the present application;

fig. 2 is a flow chart of advanced data transfer provided by an exemplary embodiment of the present application;

FIG. 3 is a block diagram of a communication system provided by an exemplary embodiment of the present application;

fig. 4 is a flowchart of an uplink resource selection method according to an exemplary embodiment of the present application;

fig. 5 is a flowchart of an uplink resource selection method according to an exemplary embodiment of the present application;

Fig. 6 is a flowchart of an uplink resource selection method according to an exemplary embodiment of the present application;

fig. 7 is a flowchart of an uplink resource selection method according to an exemplary embodiment of the present application;

fig. 8 is a schematic diagram of an uplink resource selection method according to an exemplary embodiment of the present application;

fig. 9 is a block diagram of an uplink resource selection device according to an exemplary embodiment of the present application;

fig. 10 is a block diagram of an uplink resource selection device according to an exemplary embodiment of the present application;

fig. 11 is a schematic structural diagram of a communication device according to an exemplary embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

First, the terms involved in the embodiments of the present application will be briefly described:

advanced data transfer (EARLY DATA Transmission, EDT):

In long term evolution (Long Term Evolution, LTE), EDT procedures are introduced, which can be understood as a small data transmission procedure. In this process, the terminal device may always remain in an IDLE state (rrc_idle) or a suspended state (rrc_suspend) or an INACTIVE state (rrc_inactive), and complete transmission of the uplink and/or downlink small data packets.

EDTs are classified into uplink advanced data Transmission (Mobile Originated EARLY DATA Transmission, MO-EDT) and downlink advanced data Transmission (Mobile TERMINATED EARLY DATA Transmission, MT-EDT), with the difference that whether the EDT is triggered is a terminal device or a network device.

The MO-EDT is an EDT procedure initiated by the terminal device, where the network device includes a maximum transmission block threshold (TB size) allowed by the MO-EDT to be transmitted in a system broadcast message, and the terminal device determines the amount of data to be transmitted, if the amount of data to be transmitted is smaller than the maximum TB size of the broadcast, the terminal device initiates the EDT procedure, otherwise, the terminal device initiates a normal connection establishment procedure, and enters a connection state to transmit data. The MO-EDT is based on a random access procedure, and the terminal device transmits uplink data using an uplink grant (UL grant) acquired in a random access response (Radom Access Response, RAR). The network device allocates a random access resource dedicated for the MO-EDT for the terminal device, for distinguishing whether the current random access procedure is triggered by the MO-EDT, so that a UL grant with a larger size is allocated for transmitting data through the RAR. The MO-EDT air interface transmission flow is shown in figure 1.

MT-EDT is an EDT procedure initiated by a network device, specifically a Mobility management entity (Mobility MANAGEMENT ENTITY, MME), when downlink data for a certain terminal device arrives at a serving gateway (SERVING GATEWAY, S-GW), the S-GW informs the MME of data volume information, and instructs a base station to initiate paging (paging) to find a target terminal through the MME. After receiving the paging message, the target terminal confirms whether the corresponding terminal identifier and MT-EDT instruction are contained, and if so, the target terminal initiates an MO-EDT process to respond to paging of the network side. The specific flow is shown in fig. 2.

The MO-EDT initiated in the MT-EDT process differs from the normal MO-EDT by the following:

-the terminal device initiates random access using conventional random access channel (LEGACY RACH) resources, i.e. without using random access resources dedicated to MO-EDT;

In the embodiment of the present application, LEGACY RACH resources may also be understood as contention random access (Contention Based Random Access, CBRA) resources.

-The restoration reason (ResumeCause) is mt-EDT for informing the network device of the purpose of currently initiating a connection setup;

-the base station side may further determine, via a pending data Indication (PENDING DATA Indication) sent by the core network, whether to instruct the terminal device to enter a connected state; wherein the pending data indication is used to inform the base station if there is further downlink data transmission requirement.

In the EDT process, only one uplink/downlink data transmission is supported.

Small data transfer (SMALL DATA Transmission, SDT):

In the 5G NR system, RRC states are divided into 3 types, respectively: rrc_idle (IDLE state), rrc_inactive (INACTIVE state), rrc_connected (CONNECTED state).

Wherein the rrc_inactive state is a new state introduced by the 5G system from the energy saving point of view, for the terminal device in the rrc_inactive state, radio bearers and all radio resources are released, but the terminal device side and the base station side reserve the UE access context in order to quickly restore the RRC connection, and the network typically keeps the terminal device in the rrc_inactive state where data transmission is not frequent.

Before R16, the terminal device in rrc_inactive state does not support data transmission, and when uplink or downlink data arrives, the terminal device needs to restore connection, and releases the connection to an INACTIVE state after the data transmission is completed. For terminal devices with small data volumes and low transmission frequencies, such transmission mechanisms may result in unnecessary power consumption and signaling overhead. Thus, R17 stands for research on small data transmission under rrc_inactive, and project targets mainly have two directions: random access (two-step/four-step) based small data transmission (i.e., RA-SDT) and small data transmission (i.e., CG-SDT) based on pre-configured resources (e.g., CG type 1).

The CG-SDT resource is a terminal-specific (UE-specific) resource configured by the network device through dedicated signaling, for example, RRCRELEASE messages, that is, there is no resource contention. CG-SDT resources are only available in the cell in which the resources are configured, and when the terminal device moves to another cell and initiates an access procedure, the terminal device automatically releases the CG-SDT resources.

The RA-SDT resource is configured through a cell system broadcast message, and similar to LTE EDT, the network equipment can configure random access resources special for SDT for the terminal equipment, so that the network equipment can distinguish different terminal processes.

Fig. 3 shows a block diagram of a communication system provided by an exemplary embodiment of the present application, which may include: access network 12 and terminal equipment 14.

Access network 12 includes a number of network devices 120 therein. The network device 120 may be a base station, which is a means deployed in an access network to provide wireless communication functionality for terminal devices. The base stations may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems employing different radio access technologies, the names of base station capable devices may vary, for example in LTE systems, called enodebs or enbs; in the 5G NR-U system, it is called gNodeB or gNB. As communication technology evolves, the description of "base station" may change. For convenience, the above-described devices for providing the terminal device 14 with the wireless communication function are collectively referred to as network devices.

The terminal device 14 may include various handheld devices, vehicle mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of user equipment, mobile Stations (MSs), terminal devices (TERMINAL DEVICE), and the like. For convenience of description, the above-mentioned devices are collectively referred to as terminal devices. The network device 120 and the terminal device 14 communicate with each other via some air interface technology, e.g. Uu interface. Optionally, the terminal device 14 supports performing a small data transfer procedure in the inactive state.

The technical scheme of the embodiment of the application can be applied to various communication systems, such as: global system for mobile communications (Global System of Mobile Communication, GSM), code division multiple access (Code Division Multiple Access, CDMA) system, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, general Packet Radio Service (GPRS), long term evolution (Long Term Evolution, LTE) system, LTE frequency division duplex (Frequency Division Duplex, FDD) system, LTE time division duplex (Time Division Duplex, TDD) system, long term evolution advanced (Advanced Long Term Evolution, LTE-a) system, new Radio (NR) system, NR system evolution system, LTE on unlicensed band (LTE-based access to Unlicensed spectrum, LTE-U) system, NR-U system, universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS), global interconnect microwave access (Worldwide Interoperability for Microwave Access, wiMAX) communication system, wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (WIRELESS FIDELITY, WIFI), next generation communication system or other communication system, and the like.

Generally, the number of connections supported by the conventional Communication system is limited and easy to implement, however, with the development of Communication technology, the mobile Communication system will support not only conventional Communication but also, for example, device-to-Device (D2D) Communication, machine-to-machine (Machine to Machine, M2M) Communication, machine type Communication (MACHINE TYPE Communication, MTC), inter-vehicle (Vehicle to Vehicle, V2V) Communication, and internet of vehicles (Vehicle to Everything, V2X) systems. The embodiments of the present application may also be applied to these communication systems.

Fig. 4 is a flowchart illustrating an uplink resource selection method according to an exemplary embodiment of the present application. The method may be applied in a communication system as shown in fig. 3, and the method may comprise the steps of:

Step 410: the network device sends a paging message to the terminal device, wherein the paging message comprises first indication information, the first indication information is used for indicating that the network device side triggers an MT-SDT process or indicating that downlink data arrives currently, and the RB of the downlink data is configured to support triggering SDT.

Correspondingly, the terminal device receives the paging message.

Small Data Transfer (SDT) is a data transfer mode configured for a terminal device in an inactive state. The SDT procedure does not require the establishment of an RRC connection between the terminal device and the network device. For terminal equipment with small data volume and low transmission frequency, if the data transmission can be performed after the RRC connection with the network equipment is restored only through the connection establishment restoration process, the terminal equipment needs to return to an inactive state after the data transmission is completed, and the power consumption of the terminal equipment is large. By performing the SDT procedure, the terminal device can avoid performing a transition of the connection state, thereby reducing power consumption of the terminal device.

In the embodiment of the application, the SDT process is triggered by the network equipment side, namely MT-SDT.

The core network device sends the downlink data or the indication information of the downlink data to the access network device, the access network device judges whether the MT-SDT process can be triggered, if so, the access network device initiates paging (paging) and carries the first indication information in the paging message, and the judging criterion for judging whether the MT-SDT process can be triggered by the access network device is not limited in the embodiment of the application.

In one possible implementation manner, the first indication information is used to instruct the network device side to trigger the MT-SDT procedure, so that the terminal device needs to prepare to start to perform the MT-SDT related procedure; in another possible implementation, the first indication information is used to indicate that there is downlink data arriving currently, and the RB of the downlink data is configured to support triggering SDT, so the terminal device needs to prepare to start to perform MT-SDT related procedure.

Optionally, the paging message further includes: UE identity such that the terminal device is explicitly paged itself. Exemplary, the UE identity is an inactive radio network temporary identity (Inactive Radio Network Temporary Identity, I-RNTI)

Step 420: the terminal equipment responds to the paging message, preferentially selects the first type of resources, and initiates an uplink transmission process; wherein the first type of resource comprises one of: CG-SDT resources, CFRA resources, and random access resources dedicated to responding to MT-SDT.

That is, after receiving the paging message, in order to respond to the paging at the network device side, the terminal device performs uplink resource selection according to the following three schemes:

Scheme one: and the terminal equipment responds to the paging message, preferentially selects CG-SDT resources and initiates an uplink transmission process.

That is, in the case that there is an effective CG-SDT resource, the terminal device selects the CG-SDT resource, and initiates an uplink transmission process; in the case that there is no efficient CG-SDT resource, the terminal device initiates the uplink transmission procedure taking into account other types of resources.

Scheme II: and the terminal equipment responds to the paging message, preferentially selects CFRA resources and initiates an uplink transmission process.

That is, in the case that there are valid CFRA resources, the terminal device selects the CFRA resources and initiates an uplink transmission procedure; in the absence of an efficient CFRA resource, the terminal device initiates an uplink transmission procedure taking into account other types of resources.

Scheme III: the terminal equipment responds to the paging message, preferentially selects the random access resource special for responding to the MT-SDT, and initiates an uplink transmission process.

That is, in the case that there is an effective random access resource dedicated to responding to MT-SDT, the terminal device selects the random access resource dedicated to responding to MT-SDT, and initiates an uplink transmission procedure; in case there is no efficient random access resource dedicated to responding to MT-SDT, the terminal device initiates the uplink transmission procedure taking into account other types of resources.

Optionally, after step 420, when the terminal device initiates uplink transmission, the transmitted uplink data includes second indication information, where the second indication information is used to indicate that the current purpose of initiating the connection recovery request is MT-SDT. Illustratively, the second indication information is noted as a restoration cause (ResumeCause), and ResumeCause is MT-SDT. Illustratively, the second indication information is carried in an RRC resume request (RRCResumeRequest).

In one possible implementation, no matter what type of uplink resource is selected by the terminal device when initiating the uplink transmission procedure, the terminal device needs to include the second indication information in the transmitted uplink data.

In another possible implementation, the second indication information needs to be included in the uplink data transmitted only when the terminal device initiates the uplink transmission procedure and the selected uplink resource is a CBRA resource.

It is to be understood that embodiments of the present application do not exclude implementations in which the second indication information need not be introduced for MT-SDT.

In summary, in the technical solution provided in this embodiment, when the network device indicates, through the paging message, that the terminal device is ready to start executing the MT-SDT related procedure, it is clear how to select the uplink resource to respond to the paging on the network device side after the terminal device receives the paging message.

In the embodiment of the present application, three different schemes are provided for the terminal device to select uplink resources, which will be further described below.

Fig. 5 is a flowchart illustrating an uplink resource selection method according to an exemplary embodiment of the present application. The method may be applied in a communication system as shown in fig. 3, and the method may include the following steps 510 to 560:

Step 510: the network device sends a paging message to the terminal device, wherein the paging message comprises first indication information, the first indication information is used for indicating that the network device side triggers an MT-SDT process or indicating that downlink data arrives currently, and the RB of the downlink data is configured to support triggering SDT.

Correspondingly, the terminal device receives the paging message.

Step 520: and the terminal equipment responds to the paging message and judges whether the effective CG-SDT resource exists.

Step 530: under the condition that the terminal equipment meets the first condition, confirming that effective CG-SDT resources exist; and selecting effective CG-SDT resources to initiate an uplink transmission process.

Step 540: and the terminal equipment judges whether effective RA-SDT resources exist or not under the condition that the first condition is not met.

Wherein the first condition is a condition for judging whether there is a valid CG-SDT resource.

Optionally, the first condition includes at least one of:

The cell that receives the paging message is the cell that configures CG-SDT resources.

CG-SDT resources are configured on the selected carrier.

The RSRP measurement meets the first RSRP threshold.

Wherein the first RSRP threshold is predefined in the protocol standard or configured by the network device.

There is an SSB that meets the RSRP threshold and configures CG-SDT resources.

Wherein the RSRP threshold is predefined in the protocol standard or configured by the network device.

SSB receiving paging message configures CG-SDT resources.

In one possible implementation, the terminal device further determines whether a valid RA-SDT resource exists if the first condition is not satisfied.

In another possible implementation manner, if the first condition is not satisfied, the terminal device further determines whether there is uplink data to be transmitted, and further determines whether there is a valid RA-SDT resource.

That is, the terminal device determines whether there is a valid RA-SDT resource if the first condition is not satisfied, including: under the condition that the terminal equipment does not meet the first condition, judging whether uplink data to be transmitted exist or not; and judging whether effective RA-SDT resources exist or not under the condition that uplink data to be transmitted exist. And under the condition that no uplink data to be transmitted exists, the terminal equipment selects CBRA resources and initiates an uplink transmission process.

The uplink data to be transmitted is illustratively User Plane (UP) data, control Plane (CP) data, and media access Control (Medium Access Control, MAC) Control Element (CE) data other than the RRC resume request (RRCResumeRequest).

Step 550: under the condition that the terminal equipment meets the second condition, confirming that effective RA-SDT resources exist; and selecting effective RA-SDT resources to initiate an uplink transmission process.

Step 560: and the terminal equipment selects CBRA resources and initiates an uplink transmission process under the condition that the second condition is not met.

Wherein the second condition is a condition for judging whether or not a valid RA-SDT resource exists.

Optionally, the second condition includes at least one of:

the cell that receives the paging message is the cell that configures RA-SDT resources.

RA-SDT resources are configured on the selected carrier.

The RSRP measurement meets the first RSRP threshold.

In summary, in the technical solution provided in this embodiment, when the network device indicates, through the paging message, that the terminal device is ready to start executing the MT-SDT related procedure, it is clear that, after the terminal device receives the paging message, CG-SDT resources are preferentially selected to respond to paging on the network device side.

Fig. 6 is a flowchart illustrating an uplink resource selection method according to an exemplary embodiment of the present application. The method may be applied in a communication system as shown in fig. 3, and the method may include the following steps 610 to 630:

Step 610: the network device sends a paging message to the terminal device, wherein the paging message comprises first indication information, the first indication information is used for indicating that the network device side triggers an MT-SDT process or is used for indicating that downlink data arrives currently, and the RB configuration of the downlink data is used for supporting triggering SDT.

Correspondingly, the terminal device receives the paging message.

Step 620: the terminal device responds to the paging message and searches the CFRA resource for a reference signal meeting the RSRP threshold.

Wherein the CFRA resource comprises at least one of: at least one candidate reference signal, at least one preamble (preamble) corresponding to the at least one candidate reference signal, and a message a payload (MsgA payload) corresponding to the at least one candidate reference signal, respectively, transmitting a random access opportunity (RACH Occasion, RO) resource of the preamble.

Optionally, the CFRA resource is indicated by any one of the following messages:

Paging message.

Physical downlink control channel (Physical Downlink Control Channel, PDCCH) to schedule paging messages.

Paging messages scheduled messages.

That is, CFRA resources may be indicated directly by paging messages or by PDCCHs scheduling paging messages or messages scheduled by paging messages, thereby reducing the overhead of paging messages.

Step 630: and the terminal equipment initiates an uplink transmission process by utilizing the CFRA resource corresponding to the reference signal meeting the RSRP threshold.

In an exemplary case, where there are one or more candidate reference signals that meet the RSRP threshold, the terminal device selects a CFRA resource corresponding to the candidate reference signal that meets the RSRP threshold, and initiates an uplink transmission procedure.

Optionally, under the condition that the reference signal meeting the RSRP threshold does not exist in the CFRA resource, the terminal equipment executes the steps of preferentially selecting CG-SDT resources and initiating an uplink transmission process; or if the reference signal meeting the RSRP threshold does not exist in the CFRA resources, the terminal equipment selects the CBRA resources and initiates an uplink transmission process.

That is, if the terminal device does not meet the condition of selecting CFRA resources, the terminal device may further select uplink resources according to the method in the first scheme, or may select CBRA resources.

Optionally, the reference signal comprises at least one of: SSB and channel state Information reference signal (CHANNEL STATE Information REFERENCE SIGNAL, CSI-RS).

That is, the reference signals are SSBs and/or CSI-RSs.

In summary, in the technical solution provided in this embodiment, when the network device indicates, through the paging message, that the terminal device is ready to start executing the MT-SDT related procedure, it is clear that, after receiving the paging message, the terminal device preferentially selects the CFRA resource to respond to the paging at the network device side.

Fig. 7 is a flowchart illustrating an uplink resource selection method according to an exemplary embodiment of the present application. The method may be applied in a communication system as shown in fig. 3, and the method may include the following steps 710 to 730:

Step 710: the network device sends a system broadcast message carrying a random access resource dedicated to responding to the MT-SDT.

Correspondingly, the terminal equipment receives the system broadcast message sent by the network equipment.

That is, the random resources dedicated to responding to MT-SDT are included in the system broadcast message, are cell-specific resources.

Step 720: the network device sends a paging message to the terminal device, wherein the paging message comprises first indication information, the first indication information is used for indicating that the network device side triggers an MT-SDT process or is used for indicating that downlink data arrives currently, and the RB configuration of the downlink data is used for supporting triggering SDT.

Correspondingly, the terminal device receives the paging message.

Step 730: the terminal equipment responds to the paging message, selects a random access resource special for responding to the MT-SDT, and initiates an uplink transmission process.

Alternatively, in the absence of random access resources dedicated to responding to MT-SDT, the terminal device selects CBRA resources to initiate an uplink transmission procedure.

In summary, in the technical solution provided in this embodiment, when the network device indicates, through the paging message, that the terminal device is ready to start executing the MT-SDT related procedure, it is clear that, after receiving the paging message, the terminal device preferentially selects the random access resource dedicated for responding to the MT-SDT to respond to the paging on the network device side.

The technical solution provided by the present application is described below in an exemplary manner with reference to fig. 8.

Step 810: the terminal device in rrc_inactive state receives the paging message sent by the current camping cell.

Wherein, the paging message at least comprises: UE identity, e.g., I-RNTI; the first indication information is used for indicating that the current paging process is triggered by the MT-SDT process or indicating that the current downlink data arrives, and the RB to which the downlink data belongs is configured with the SDT.

Step 820: the terminal equipment responds to the paging message sent by the network side to initiate an uplink transmission process, and the resource selection method for uplink transmission comprises the following steps:

scheme one: CG-SDT resources are preferentially selected.

1.1 Preferably selects CG-SDT resources, RA-SDT resources if no valid CG-SDT resources exist, and CBRA resources if valid RA-SDT resources also do not exist.

1.2 Selecting CG-SDT resource preferentially, if no effective CG-SDT resource exists, judging whether the terminal equipment has uplink data to be transmitted, if so, selecting RA-SDT resource, otherwise, selecting CBRA resource.

Scheme II: CFRA resources are preferentially selected.

Illustratively, the network device configures CFRA resources for the terminal device via a paging message.

And the terminal equipment judges whether the SSB meeting the RSRP threshold exists in the CFRA resources, and if so, the terminal equipment initiates an uplink transmission process by utilizing the CFRA resources. If there is no SSB satisfying the RSRP threshold, the terminal device further selects uplink resources according to the method in scheme one, or the terminal device selects CBRA resources.

Scheme III: the random access resources dedicated to responding to the MT-SDT are preferentially selected.

The network equipment configures a random access resource special for responding to the MT-SDT for the terminal equipment through a system broadcast message, and initiates uplink transmission by utilizing the random access resource. If the random access resource is not configured, the terminal equipment selects CBRA resource.

The above-described method embodiments may be implemented individually or in combination, and the present application is not limited thereto.

In the above embodiments, the steps performed by the terminal device may be implemented solely as the uplink resource selection method on the terminal device side, and the steps performed by the network device may be implemented solely as the uplink resource selection method on the network device side.

Fig. 9 is a block diagram of an uplink resource selection device according to an exemplary embodiment of the present application, where the device may be implemented as a terminal device or as a part of a terminal device, and the device includes: a message receiving module 902 and a resource selecting module 904;

the message receiving module 902 is configured to receive a paging message, where the paging message includes first indication information, where the first indication information is used to instruct a network device side to trigger an MT-SDT procedure, or is used to indicate that downlink data arrives currently, and an RB of the downlink data is configured to support triggering SDT;

the resource selection module 904 is configured to, in response to the paging message, preferentially select a first type of resource, and initiate an uplink transmission procedure;

In an alternative embodiment, the first type of resource includes: the CG-SDT resource;

The resource selection module 904, configured to confirm, in response to the paging message, that there is a valid CG-SDT resource based on satisfying a first condition; and selecting the effective CG-SDT resource and initiating the uplink transmission process.

In an alternative embodiment, the resource selection module 904 is configured to, if the first condition is not satisfied, confirm that the RA-SDT resource is valid based on a second condition being satisfied; and selecting the effective RA-SDT resource to initiate the uplink transmission process.

In an alternative embodiment, the resource selection module 904 is configured to select CBRA resources to initiate the uplink transmission procedure if the first condition and the second condition are not satisfied.

In an optional embodiment, the resource selection module 904 is configured to, when the first condition is not satisfied and there is the uplink data to be transmitted, determine whether the second condition is satisfied, and there is the valid RA-SDT resource; and under the condition that the first condition is not met and the uplink data to be transmitted does not exist, CBRA resources are selected, and the uplink transmission process is initiated.

In an alternative embodiment, the second condition includes at least one of:

the cell receiving the paging message is a cell configuring the RA-SDT resource;

The RA-SDT resource is configured on the selected carrier;

The RSRP measurement meets a first RSRP threshold.

In an alternative embodiment, the first condition includes at least one of:

the cell receiving the paging message is a cell configuring the CG-SDT resource;

Configuring the CG-SDT resource on the selected carrier;

The RSRP measurement results meet a first RSRP threshold;

There is an SSB that meets the RSRP threshold and configures the CG-SDT resources;

the SSB receiving the paging message configures the CG-SDT resources.

In an alternative embodiment, the first type of resource includes: the CFRA resource;

The resource selection module 904 is configured to search the CFRA resource for a reference signal that meets an RSRP threshold in response to the paging message; and initiating the uplink transmission process by utilizing the CFRA resource corresponding to the reference signal meeting the RSRP threshold.

In an optional embodiment, the resource selection module 904 is configured to perform the step of preferentially selecting the CG-SDT resource and initiating the uplink transmission procedure in a case where no reference signal satisfying the RSRP threshold exists in the CFRA resource;

Or alternatively, the first and second heat exchangers may be,

The resource selection module 904 is configured to select a CBRA resource and initiate the uplink transmission procedure when there is no reference signal satisfying the RSRP threshold in the CFRA resource.

In an alternative embodiment, the CFRA resource is indicated by any one of the following messages:

the paging message;

Scheduling a PDCCH of the paging message;

A message scheduled by the paging message;

wherein the CFRA resource includes at least one of: and the at least one candidate reference signal is respectively corresponding to the lead codes, the at least one candidate reference signal is respectively corresponding to the message A load, and RO resources of the lead codes are transmitted.

In an alternative embodiment, the reference signal includes at least one of:

SSB and CSI-RS.

In an alternative embodiment, the first type of resource includes: said random access resource dedicated to responding to said MT-SDT;

The message receiving module 902 is configured to receive a system broadcast message, where the system broadcast message carries the random access resource dedicated to responding to the MT-SDT.

In an alternative embodiment, the resource selection module 904 is configured to select CBRA resources to initiate the uplink transmission procedure in the absence of the random access resources dedicated to responding to the MT-SDT.

Fig. 10 is a block diagram of an uplink resource selection apparatus according to an exemplary embodiment of the present application, where the apparatus may be implemented as a network device or as a part of a network device, and the apparatus includes: a message sending module 1002;

The message sending module 1002 is configured to send a paging message, where the paging message includes first indication information, where the first indication information is used to indicate that the device side triggers an MT-SDT procedure, or is used to indicate that there is currently downlink data to arrive, and an RB of the downlink data is configured to support triggering SDT;

In an alternative embodiment, the first type of resource includes: the CFRA resource; the CFRA resource is indicated by any one of the following messages:

the paging message;

Scheduling a PDCCH of the paging message;

A message scheduled by the paging message;

In an alternative embodiment, the reference signal includes at least one of:

SSB and CSI-RS.

The message sending module 1002 is configured to send a system broadcast message, where the system broadcast message carries the random access resource dedicated to responding to the MT-SDT.

Fig. 11 shows a schematic structural diagram of a communication device (terminal device or network device) according to an exemplary embodiment of the present application, where the communication device 1100 includes: a processor 1101, a transceiver 1102, and a memory 1103.

The processor 1101 includes one or more processing cores, and the processor 1101 executes various functional applications by running software programs and modules.

The transceiver 1102 may be used to receive and transmit information, and the transceiver 1102 may be a communication chip.

The memory 1103 may be used for storing a computer program, and the processor 1101 is configured to execute the computer program to implement the steps performed by the communication device in the above-described method embodiment.

Further, the memory 1103 may be implemented by any type of volatile or nonvolatile memory device, including but not limited to: random-Access Memory (RAM) and Read-Only Memory (ROM), erasable programmable Read-Only Memory (EPROM), electrically erasable programmable Read-Only Memory (ELECTRICALLY ERASABLE PROGRAMMABLE READ-Only Memory, EEPROM), flash Memory or other solid state Memory technology, compact disc Read-Only (Compact Disc Read-Only Memory, CD-ROM), high density digital video disc (Digital Video Disc, DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices.

When the communication device is implemented as a terminal device, the processor 1101 and the transceiver 1102 in the embodiments of the present application may execute steps executed by the terminal device in any of the methods shown in fig. 4 to 7, which are not described herein.

In one possible implementation, when the communication device is implemented as a terminal device,

The transceiver 1102 is configured to receive a paging message, where the paging message includes first indication information, where the first indication information is used to instruct a network device side to trigger an MT-SDT procedure, or is used to indicate that downlink data arrives currently, and an RB of the downlink data is configured to support triggering SDT;

The processor 1101 is configured to, in response to the paging message, preferentially select a first type of resource, and initiate an uplink transmission procedure;

When the communication device is implemented as a network device, the processor 1101 and the transceiver 1102 in the embodiments of the present application may execute steps executed by the network device in any of the methods shown in fig. 4 to 7, which are not described herein.

In one possible implementation, when the communication device is implemented as a network device,

The transceiver 1102 is configured to send a paging message, where the paging message includes first indication information, where the first indication information is used to instruct a network device side to trigger an MT-SDT procedure, or is used to indicate that there is currently downlink data to arrive, and an RB of the downlink data is configured to support triggering SDT;

In an exemplary embodiment, there is also provided a computer readable storage medium having stored therein at least one instruction, at least one program, a code set, or a set of instructions, which are loaded and executed by a processor to implement the uplink resource selection method provided by the above-described respective method embodiments.

In an exemplary embodiment, a chip is also provided, which includes programmable logic circuits and/or program instructions, for implementing the uplink resource selection method described in the above aspect when the chip is run on a communication device.

In an exemplary embodiment, there is also provided a computer program product which, when run on a processor of a computer device, causes the communication device to perform the uplink resource selection method of the above aspect.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program for instructing relevant hardware, where the program may be stored in a computer readable storage medium, and the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The foregoing description of the preferred embodiments of the present application is not intended to limit the application, but rather, the application is to be construed as limited to the appended claims.

Claims

An uplink resource selection method, which is characterized by comprising the following steps:

Receiving a paging message, wherein the paging message comprises first indication information, the first indication information is used for indicating that a network equipment side triggers a downlink small data transmission MT-SDT process or is used for indicating that downlink data arrives currently, and a radio bearer RB of the downlink data is configured to support triggering SDT;

responding to the paging message, preferentially selecting a first type of resource, and initiating an uplink transmission process;

Wherein the first type of resource comprises one of: small data transmission CG-SDT resources based on pre-configured resources, non-contention random access CFRA resources, and random access resources dedicated to responding to the MT-SDT.
The method of claim 1, wherein the first type of resource comprises: the CG-SDT resource;

the response to the paging message, preferentially selects the first type of resources, and initiates an uplink transmission process, including:

Responsive to the paging message, confirming that there is a valid CG-SDT resource based on satisfying a first condition;

and selecting the effective CG-SDT resource and initiating the uplink transmission process.
The method according to claim 2, wherein the method further comprises:

On the condition that the first condition is not met, confirming that effective small data transmission RA-SDT resources based on random access exist on the basis that a second condition is met;

And selecting the effective RA-SDT resource to initiate the uplink transmission process.
A method according to claim 3, characterized in that the method further comprises:

and under the condition that the first condition and the second condition are not met, selecting to compete for random access (CBRA) resources, and initiating the uplink transmission process.
A method according to claim 3, characterized in that the method further comprises:

Judging whether the second condition is met or not under the condition that the first condition is not met and the uplink data to be transmitted exists, and if yes, the effective RA-SDT resource exists;

and under the condition that the first condition is not met and the uplink data to be transmitted does not exist, CBRA resources are selected, and the uplink transmission process is initiated.
The method of any one of claims 3 to 5, wherein the second condition comprises at least one of:

the cell receiving the paging message is a cell configuring the RA-SDT resource;

The RA-SDT resource is configured on the selected carrier;

The reference signal received power, RSRP, measurement meets a first RSRP threshold.
The method of any one of claims 2 to 6, wherein the first condition comprises at least one of:

the cell receiving the paging message is a cell configuring the CG-SDT resource;

Configuring the CG-SDT resource on the selected carrier;

The RSRP measurement results meet a first RSRP threshold;

there is a synchronization signal block SSB that satisfies an RSRP threshold and that configures the CG-SDT resources;

the SSB receiving the paging message configures the CG-SDT resources.
The method of claim 1, wherein the first type of resource comprises: the CFRA resource;

the responding to the paging message, preferentially selecting the first type of resource, and initiating the uplink transmission process, including:

searching for a reference signal meeting an RSRP threshold in the CFRA resource in response to the paging message;

And initiating the uplink transmission process by utilizing the CFRA resource corresponding to the reference signal meeting the RSRP threshold.
The method of claim 8, wherein the method further comprises:

Executing a step of preferentially selecting the CG-SDT resource and initiating the uplink transmission process when the reference signal satisfying the RSRP threshold does not exist in the CFRA resource;

Or alternatively, the first and second heat exchangers may be,

And if the reference signal meeting the RSRP threshold is not existed in the CFRA resources, selecting a CBRA resource, and initiating the uplink transmission process.
The method according to claim 8 or 9, characterized in that the CFRA resource is indicated by any one of the following messages:

the paging message;

Scheduling a Physical Downlink Control Channel (PDCCH) of the paging message;

A message scheduled by the paging message;

Wherein the CFRA resource includes at least one of: and the at least one candidate reference signal is respectively corresponding to the lead codes, the at least one candidate reference signal is respectively corresponding to the message A load, and the random access opportunity RO resource of the lead codes is transmitted.
The method according to any of claims 8 to 10, wherein the reference signal comprises at least one of:

SSB and channel state information reference signal CSI-RS.
The method of claim 1, wherein the first type of resource comprises: the method further comprises, before the random access resource dedicated to responding to the MT-SDT preferentially selects the first type of resource in response to the paging message and initiates the uplink transmission procedure:

And receiving a system broadcast message, wherein the system broadcast message carries the random access resource special for responding to the MT-SDT.
The method according to claim 12, wherein the method further comprises:

and if the random access resource special for responding to the MT-SDT does not exist, selecting CBRA resources and initiating the uplink transmission process.
An uplink resource selection method, which is characterized by comprising the following steps:

Sending a paging message, wherein the paging message comprises first indication information, the first indication information is used for indicating that a network equipment side triggers a downlink small data transmission MT-SDT process or is used for indicating that downlink data arrives currently, and a radio bearer RB of the downlink data is configured to support triggering SDT;

The paging message is used for triggering the terminal equipment to initiate an uplink transmission process, and the terminal equipment preferentially selects a first type of resource to initiate the uplink transmission process; the first type of resource comprises one of: small data transmission CG-SDT resources based on pre-configured resources, non-contention random access CFRA resources, and random access resources dedicated to responding to the MT-SDT.
The method of claim 14, wherein the first type of resource comprises: the CFRA resource; the CFRA resource is indicated by any one of the following messages:

the paging message;

Scheduling a Physical Downlink Control Channel (PDCCH) of the paging message;

A message scheduled by the paging message;

Wherein the CFRA resource includes at least one of: and the at least one candidate reference signal is respectively corresponding to the lead codes, the at least one candidate reference signal is respectively corresponding to the message A load, and the random access opportunity RO resource of the lead codes is transmitted.
The method of claim 15, wherein the reference signal comprises at least one of:

a synchronization signal block SSB and a channel state information reference signal CSI-RS.
The method of claim 14, wherein the first type of resource comprises: the random access resource dedicated to responding to the MT-SDT, the method further comprising:

and sending a system broadcast message, wherein the system broadcast message carries the random access resource special for responding to the MT-SDT.
An uplink resource selection apparatus, the apparatus comprising: a message receiving module and a resource selecting module;

The message receiving module is configured to receive a paging message, where the paging message includes first indication information, where the first indication information is used to instruct a network device side to trigger a downlink small data transmission MT-SDT process, or is used to indicate that downlink data arrives currently, and a radio bearer RB of the downlink data is configured to support triggering SDT;

The resource selection module is used for responding to the paging message, preferentially selecting the first type of resources and initiating an uplink transmission process;

Wherein the first type of resource comprises one of: small data transmission CG-SDT resources based on pre-configured resources, non-contention random access CFRA resources, and random access resources dedicated to responding to the MT-SDT.
The apparatus of claim 18, wherein the first type of resource comprises: the CG-SDT resource;

The resource selection module is used for responding to the paging message and confirming that the CG-SDT resource is valid based on the condition that the first condition is met; and selecting the effective CG-SDT resource and initiating the uplink transmission process.
The apparatus of claim 19, wherein the device comprises a plurality of sensors,

The resource selection module is used for confirming that effective random access-based small data transmission RA-SDT resources exist based on the condition that the first condition is not met and the second condition is met; and selecting the effective RA-SDT resource to initiate the uplink transmission process.
The apparatus of claim 20, wherein the device comprises a plurality of sensors,

And the resource selection module is used for selecting the contention random access (CBRA) resource and initiating the uplink transmission process under the condition that the first condition and the second condition are not satisfied.
The apparatus of claim 20, wherein the device comprises a plurality of sensors,

The resource selection module is configured to determine, when the first condition is not satisfied and the uplink data to be transmitted exists, whether the second condition is satisfied and an effective RA-SDT resource exists; and under the condition that the first condition is not met and the uplink data to be transmitted does not exist, CBRA resources are selected, and the uplink transmission process is initiated.
The apparatus of any one of claims 20 to 22, wherein the second condition comprises at least one of:

the cell receiving the paging message is a cell configuring the RA-SDT resource;

The RA-SDT resource is configured on the selected carrier;

The reference signal received power, RSRP, measurement meets a first RSRP threshold.
The apparatus of any one of claims 19 to 23, wherein the first condition comprises at least one of:

the cell receiving the paging message is a cell configuring the CG-SDT resource;

Configuring the CG-SDT resource on the selected carrier;

The RSRP measurement results meet a first RSRP threshold;

there is a synchronization signal block SSB that satisfies an RSRP threshold and that configures the CG-SDT resources;

the SSB receiving the paging message configures the CG-SDT resources.
The apparatus of claim 18, wherein the first type of resource comprises: the CFRA resource;

The resource selection module is used for responding to the paging message and searching the CFRA resource for a reference signal meeting an RSRP threshold; and initiating the uplink transmission process by utilizing the CFRA resource corresponding to the reference signal meeting the RSRP threshold.
The apparatus of claim 25, wherein the device comprises a plurality of sensors,

The resource selection module is configured to perform a step of preferentially selecting the CG-SDT resource and initiating the uplink transmission procedure when the reference signal satisfying the RSRP threshold does not exist in the CFRA resource;

Or alternatively, the first and second heat exchangers may be,

And the resource selection module is used for selecting a CBRA resource and initiating the uplink transmission process under the condition that the reference signal meeting the RSRP threshold is not existed in the CFRA resource.
The apparatus according to claim 25 or 26, wherein the CFRA resource is indicated by any one of the following messages:

the paging message;

Scheduling a Physical Downlink Control Channel (PDCCH) of the paging message;

A message scheduled by the paging message;

Wherein the CFRA resource includes at least one of: and the at least one candidate reference signal is respectively corresponding to the lead codes, the at least one candidate reference signal is respectively corresponding to the message A load, and the random access opportunity RO resource of the lead codes is transmitted.
The apparatus of any one of claims 25 to 27, wherein the reference signal comprises at least one of:

SSB and channel state information reference signal CSI-RS.
The apparatus of claim 18, wherein the first type of resource comprises: said random access resource dedicated to responding to said MT-SDT;

The message receiving module is configured to receive a system broadcast message, where the system broadcast message carries the random access resource dedicated to responding to the MT-SDT.
The apparatus of claim 29, wherein the device comprises a plurality of sensors,

The resource selection module is configured to select CBRA resources and initiate the uplink transmission procedure when the random access resource dedicated to responding to the MT-SDT does not exist.
An uplink resource selection apparatus, the apparatus comprising: a message sending module;

The message sending module is configured to send a paging message, where the paging message includes first indication information, where the first indication information is used to indicate that the device side triggers a downlink small data transmission MT-SDT process, or is used to indicate that downlink data arrives currently, and a radio bearer RB of the downlink data is configured to support triggering SDT;

The paging message is used for triggering the terminal equipment to initiate an uplink transmission process, and the terminal equipment preferentially selects a first type of resource to initiate the uplink transmission process; the first type of resource comprises one of: small data transmission CG-SDT resources based on pre-configured resources, non-contention random access CFRA resources, and random access resources dedicated to responding to the MT-SDT.
The apparatus of claim 31, wherein the first type of resource comprises: the CFRA resource; the CFRA resource is indicated by any one of the following messages:

the paging message;

Scheduling a Physical Downlink Control Channel (PDCCH) of the paging message;

A message scheduled by the paging message;

Wherein the CFRA resource includes at least one of: and the at least one candidate reference signal is respectively corresponding to the lead codes, the at least one candidate reference signal is respectively corresponding to the message A load, and the random access opportunity RO resource of the lead codes is transmitted.
The apparatus of claim 32, wherein the reference signal comprises at least one of:

a synchronization signal block SSB and a channel state information reference signal CSI-RS.
The apparatus of claim 31, wherein the first type of resource comprises: said random access resource dedicated to responding to said MT-SDT;

The message sending module is configured to send a system broadcast message, where the system broadcast message carries the random access resource dedicated to responding to the MT-SDT.
A terminal device, characterized in that the terminal device comprises: a transceiver and a processor; wherein,

The transceiver is configured to receive a paging message, where the paging message includes first indication information, where the first indication information is used to instruct a network device side to trigger a downlink small data transmission MT-SDT process, or is used to indicate that downlink data arrives currently, and a radio bearer RB of the downlink data is configured to support triggering SDT;

The processor is used for responding to the paging message, preferentially selecting the first type of resources and initiating an uplink transmission process;

Wherein the first type of resource comprises one of: small data transmission CG-SDT resources based on pre-configured resources, non-contention random access CFRA resources, and random access resources dedicated to responding to the MT-SDT.
A network device, the network device comprising: a transceiver; wherein,

The transceiver is configured to send a paging message, where the paging message includes first indication information, where the first indication information is used to instruct a network device side to trigger a downlink small data transmission MT-SDT process, or is used to indicate that downlink data arrives currently, and a radio bearer RB of the downlink data is configured to support triggering SDT;

The paging message is used for triggering the terminal equipment to initiate an uplink transmission process, and the terminal equipment preferentially selects a first type of resource to initiate the uplink transmission process; the first type of resource comprises one of: small data transmission CG-SDT resources based on pre-configured resources, non-contention random access CFRA resources, and random access resources dedicated to responding to the MT-SDT.
A computer readable storage medium having stored therein executable instructions that are loaded and executed by a processor to implement the uplink resource selection method of any one of claims 1 to 17.
A chip comprising programmable logic circuits and/or program instructions for implementing the uplink resource selection method according to any one of claims 1 to 17 when the chip is running.
A computer program product or computer program comprising computer instructions stored in a computer readable storage medium, from which a processor reads and executes the computer instructions to implement the uplink resource selection method according to any one of claims 1 to 17.