CN110856276A

CN110856276A - Data transmission and receiving method and device for non-connection state UE, terminal and base station

Info

Publication number: CN110856276A
Application number: CN201911121706.2A
Authority: CN
Inventors: 徐敏
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-02-28
Anticipated expiration: 2039-11-15
Also published as: CN110856276B; WO2021093431A1

Abstract

A data transmission and receiving method and device, a terminal and a base station of non-connected UE are provided, the data transmission method comprises the following steps: receiving pre-configuration information; and transmitting the data packet to be transmitted by using the public resource according to the pre-configuration information. The technical scheme provided by the invention can reduce the data transmission delay of the non-connection state UE.

Description

Data transmission and receiving method and device for non-connection state UE, terminal and base station

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting and receiving data of a non-connected UE, a terminal, and a base station.

Background

In a New Radio (NR) communication system of the 3rd Generation Partnership Project (3 GPP), an air interface of a User Equipment (UE) has three states: radio Resource Control (RRC) IDLE (IDLE), RRC INACTIVE (INACTIVE) and RRC CONNECTED (CONNECTED) states.

The UE in the RRC idle state is not connected to a base station (gNB), and only needs to periodically initiate location update, cell selection and reselection procedures, receive paging, and the like. The RRC Connection state is connected to the network, and the network configures a Radio Bearer (RB) and a physical layer of the UE, and Multi-cell operations including a Dual Connection (DC) operation, a Carrier Aggregation (CA) operation, and a Multi-RAT Dual Connection (MR-DC) operation, which refers to an operation of performing Dual Connection transmission through different Radio access technologies. The DC operation can be divided into a co-frequency scenario and a pilot frequency scenario, and is controlled by different base stations of at least two cells. CA operation is controlled by a single base station of a single cell. The network can perform uplink and downlink data scheduling on the UE in the RRC connection state.

The UE in the RRC inactive state moves within a Notification Area (RAN-based Notification Area, RNA) of a Radio Access Network (RAN) without notifying a base station, and the UE may retain a part of the configuration. Currently, a UE in an RRC inactive state may reserve configurations such as a Packet Data Convergence Protocol (PDCP) layer or a Service Data Adaptation Protocol (SDAP) layer, and some lower-layer configurations of a Primary Cell (PCell), but may not reserve a lower-layer Secondary Cell Group (SCG) configuration. At this time, if the network needs to schedule the UE or the UE has data to send, the network needs to transition to the RRC connected state, and recover the reserved configuration for data transmission.

In the prior art, if a UE in a non-connected state needs to initiate data transmission, a random access process is usually required to be performed to transition from the non-connected state to a connected state, the state transition time is long, the data transmission delay of the non-connected UE may be prolonged, and improvement is required.

Disclosure of Invention

The technical problem solved by the invention is how to reduce the data transmission delay of the non-connection state UE.

To solve the foregoing technical problem, an embodiment of the present invention provides a data transmission method for a non-connected UE, including: receiving pre-configuration information; and transmitting the data packet to be transmitted by using the public resource according to the pre-configuration information.

Optionally, the preconfiguration information is used to indicate that the network allows the UE to transmit the data packet to be transmitted based on the common resource.

Optionally, the preconfigured information includes one or more of: presetting a threshold for data time delay; presetting a threshold for network load; service information; and a fallback indication, where the fallback indication is used to indicate that a network allows the UE to transmit the data packet to be transmitted using the common resource, and/or is used to indicate a maximum number of times that the network allows the UE to transmit the data packet to be transmitted using the common resource.

Optionally, the service information includes one or more of the following items: a logical channel identification; a radio bearer identity; accessing a category identification; and accessing the identification.

Optionally, the maximum number of times is greater than 1, and the data transmission method further includes: if the data packet to be transmitted fails to be transmitted based on the public resource, judging whether a pre-configured resource is available; and when the pre-configured resources are unavailable and the times of transmitting the data packet to be transmitted by using the public resources are less than the maximum times, continuing to transmit the data packet to be transmitted based on the public resources.

Optionally, the data transmission method further includes: and when the pre-configuration resource is available, transmitting the data packet to be transmitted by adopting the pre-configuration resource.

Optionally, the receiving the pre-configuration information includes: receiving the provisioning information based on an RRC connection release message and/or system information.

Optionally, the data transmission method further includes: if cell reselection is performed from a serving cell to a preset specific cell, when preconfigured information in the RRC connection release message is different from preconfigured information in the system information, based on the system information of the preset specific cell; wherein the preset specific cell refers to other cells except the serving cell, and the UE in the preset specific cell can use the preconfigured resource.

Optionally, the transmitting the data packet to be transmitted by using the common resource includes: judging whether the next pre-configured resource for sending the data packet to be transmitted meets the preset service requirement or not; and if the preset service requirement is not met, transmitting the data packet to be transmitted based on the public resource.

Optionally, the transmitting the data packet to be transmitted based on the common resource includes: and if the BWP to which the pre-configured resource belongs does not have the public resource, switching to an uplink initial bandwidth or a bandwidth pre-configured by a network, and transmitting the data packet to be transmitted by using the public resource of the uplink initial bandwidth or the bandwidth pre-configured by the network.

Optionally, before transmitting the data packet to be transmitted by using the common resource, the data transmission method further includes: and when the data packet to be transmitted exists, performing measurement or performing listening-before-speaking in an unlicensed frequency band or not transmitting the data packet to be transmitted in a measurement gap.

Optionally, the common resource includes one or more of: two-step RACH resources, advanced data transmission resources, four-step RACH resources, and contention-based uplink transmission resources.

In order to solve the above technical problem, an embodiment of the present invention further provides a data receiving method for a non-connected UE, including: sending pre-configuration information; and receiving the data packet to be transmitted by using the common resource.

Optionally, the sending the provisioning information includes: transmitting the provisioning information based on an RRC connection release message and/or system information.

Optionally, the common resource includes one or more of: two-step RACH resources, advanced data transmission resources, four-step RACH resources and contention-based uplink transmission resources.

In order to solve the foregoing technical problem, an embodiment of the present invention further provides a data transmission apparatus for a non-connected UE, including: a receiving module for receiving pre-configuration information; and the transmission module is used for transmitting the data packet to be transmitted by using the public resource according to the pre-configuration information.

In order to solve the foregoing technical problem, an embodiment of the present invention further provides a data receiving apparatus for a non-connected UE, including: a sending module, configured to send preconfigured information; and the receiving module is used for receiving the data packet to be transmitted by using the public resource.

To solve the above technical problem, an embodiment of the present invention further provides a storage medium having stored thereon computer instructions, where the computer instructions execute the steps of the above method when executed.

In order to solve the foregoing technical problem, an embodiment of the present invention further provides a terminal, including a memory and a processor, where the memory stores computer instructions executable on the processor, and the processor executes the computer instructions to perform the steps of the foregoing method.

In order to solve the above technical problem, an embodiment of the present invention further provides a base station, including a memory and a processor, where the memory stores computer instructions executable on the processor, and the processor executes the computer instructions to perform the steps of the above method.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

the embodiment of the invention provides a data transmission method of non-connected UE, which comprises the following steps: receiving pre-configuration information; and transmitting the data packet to be transmitted by using the public resource according to the pre-configuration information. The embodiment of the invention provides a technical scheme for transmitting the data packet to be transmitted by using the public resource for the non-connected UE which can adopt the pre-configured resource to transmit data, so that the UE has the opportunity to use the public resource, the time delay caused by state transition can be reduced, the state transition time from the non-connected state to the connected state is saved, the service transmission requirement of the UE is favorably ensured, and the data transmission efficiency is improved.

Further, the pre-configuration information is used for indicating that the network allows the UE to transmit the data packet to be transmitted based on the common resource. The embodiment of the invention sends the pre-configuration information through the base station, so that the UE in the non-connection state has the opportunity to use the public resource to transmit data, further provides more data transmission opportunities for the UE in the non-connection state, and is favorable for improving the data transmission efficiency.

Further, the transmitting the data packet to be transmitted by using the common resource comprises: judging whether the next pre-configured resource for sending the data packet to be transmitted meets the preset service requirement or not; and if the preset service requirement is not met, transmitting the data packet to be transmitted based on the public resource. The embodiment of the invention allows the non-connected UE to use the public resource to transmit data on the premise that the pre-configured resource does not meet the preset service requirement, further saves time delay for the non-connected UE and provides possibility for improving the data transmission rate.

Drawings

Fig. 1 is a flow chart of a random access in the prior art;

fig. 2 is a schematic flow chart of another random access in the prior art;

fig. 3 is a flow chart illustrating a random access procedure in the prior art;

fig. 4 is a flowchart illustrating a data transmission method of a non-connected UE according to an embodiment of the present invention;

fig. 5 is a flowchart illustrating a data receiving method of a non-connected UE according to an embodiment of the present invention;

fig. 6 is a schematic signaling interaction diagram in a typical scenario according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a data transmission apparatus for an unconnected UE according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a data receiving apparatus of a non-connected UE according to an embodiment of the present invention.

Detailed Description

As mentioned in the background, in the prior art, data is transferred after a UE in a non-connected state is migrated to a connected state, but the state migration introduces a long delay, so that the data transfer process needs to be further improved.

In the prior art, the Random Access process is mainly divided into Contention-based Random Access (CBRA) and Contention-Free Random Access (CFRA).

If CFRA is adopted, the network needs to configure dedicated resources, which mainly refer to time-frequency resources and code resources for initiating a random access preamble (preamble), and are indicated by a parameter ra-preamble index. Referring to fig. 1, fig. 1 is a schematic flow chart of a random access in the prior art. The random access is a CFRA. First, the base station 2 performs operation S0, i.e., transmits Random access preamble allocation information (Random access preamble assignment) to the user equipment 1. Secondly, after determining the random access preamble and the time-frequency resource, the user equipment 1 may perform operation S1, that is, send the random access preamble to the base station 2. Thereafter, the base station 2 may perform operation S2, i.e., transmit a random access response to the user equipment 1.

Fig. 2 is a schematic flow chart of another random access in the prior art. The random access is CBRA. Referring to fig. 2, first, when the user equipment 1 is in the RRC inactive State, the user equipment 1 may perform operation S1, select one SSB or CSI-RS from Synchronization Signal and Physical Random Access Channel (SSB) blocks or CSI-RS blocks that satisfy a condition, and then select a Random Access preamble, which is transmitted in a time-frequency resource of an initiation allowed Physical Random Access Channel (PRACH) opportunity (RO), i.e., message 1(MSG 1).

Second, the user equipment 1 receives the random access response, message 2, sent by the base station 2(MSG 2). The user equipment 1 receives a Random Access response through a Physical Downlink Control Channel (PDCCH) scrambled by detecting a Random Access-Radio Network Temporary Identity (RA-RNTI).

The random access response includes a Timing advance command (TA command for short) to carry Timing Advance (TA) information, and also includes an uplink grant (grant) and a Temporary Cell-Radio Network Temporary Identifier (TC-RNTI). The uplink grant carries scheduling information of a Message 3(Message 3, MSG3 for short) sent by the UE 1, and the TC-RNTI is used for a UE receiving Message 4(Message4, MSG4 for short) without a Cell-Radio Network Temporary Identifier (C-RNTI). Since there is a collision due to the possibility that a plurality of UEs may select the same RO and random access preamble to initiate the random access procedure, operations S3 and S4 are required to resolve the collision.

After that, the user equipment 1 performs operation S3, transmitting the MSG 3. If the user equipment 1 has the C-RNTI, a Media Access Control (MAC) Control Element (CE) is sent. If there is a spare, other information such as a Buffer State Report (BSR) may be sent. If the UE 1 is in an idle state or an inactive state and has no C-RNTI, it sends a Common Control Channel (CCCH) message, which includes a RRC setup request (RRCSetupRequest) or a RRC recovery request (rrcresumererequest), and the like, where the message carries information that can be used as a UE Identity (Identity) for collision resolution.

Further, the user equipment 1 performs operation S4, and receives the collision resolution message, i.e., MSG4, transmitted by the base station 2. If the user equipment 1 has the C-RNTI, the user equipment 1 may receive the PDCCH scrambled using the C-RNTI. The scheduled data at this time is receivable by the specific UE. If the user equipment 1 receives the information, the conflict resolution is considered to be successful and the random access procedure is successful. If the user equipment 1 does not receive the scheduling of the base station 2 within a certain time, the conflict resolution is considered to fail. If the user equipment 1 does not have the C-RNTI, the TC-RNTI received by the MSG3 is used to receive the PDCCH, and if the received data carries a Contention Resolution Identity (Contention Resolution Identity) MAC CE, the user equipment 1 may consider that the collision Resolution is successful.

In order to speed up the random access procedure, reduce the delay and reduce the number of messaging times, the prior art provides two-step random access. Fig. 3 is a flow chart of another random access procedure in the prior art. Referring to fig. 3, in the two-step random access procedure, first, the user equipment 1 performs operation S1, i.e. sends a message a (MSGA), which includes the original MSG1 and MSG 3. In other words, the MSGA includes a random access preamble transmitted on the PRACH and a payload (payload) portion transmitted on a Physical Uplink Shared Channel (PUSCH).

Next, the user equipment 1 performs operation S2, and receives a message b (msgb), i.e. the collision resolution information, returned from the base station 2. The MSGB contains MSG2 and MSG4 information. If the base station 2 only receives the random access preamble transmitted by the user equipment 1, the random access response shown in fig. 2 is transmitted according to the four-step random access procedure shown in fig. 2, and the user equipment 1 may fall back to the four-step random access procedure.

Because the inactive state or idle state UE needs to perform state transition first when sending data, the MSGA only contains RRC messages, and data can be sent only after the random access procedure is completed. In order to send data in the non-connected state, the prior art proposes two packet transmission mechanisms. The first is that the MSG3 or MSGA may carry Data for Early Data Transmission (EDT) in addition to sending RRC messages. Further, if the TA is valid, the random access preamble may not be transmitted.

The second is that the network configures pre-Configured uplink resource (PUR) or Configured Grant (CG) for the UE, where the CG and the PUR may be regarded as a dedicated pre-Configured resource for sending uplink data, and the resource is periodic and includes time domain, frequency domain, and code domain resource information. The UE using the PUR resource or the CG resource has an effective TA and can directly transmit data without transmitting a random access preamble. Compared with the four-step process, two steps of MSG1 and MSG2 are reduced.

Packet transmission in the prior art is mainly based on network configuration. For example, when the amount of data that the UE needs to send is smaller than a preset threshold, or characteristics such as delay requirements and service periods of certain services are considered, the network configures the UE to use a packet transmission mode.

Currently, the non-connected random access procedure defines the sequence of selecting different transmission modes: selecting an Uplink or a Supplementary Uplink (UL/SUL for short), wherein the selection corresponds to a Reference Signal Received Power (RSRP) threshold; and a two-step or four-step (2-step/4-step) random access procedure is selected, the selection corresponding to another RSRP threshold. If a two-step random access procedure is selected, the random access procedure type (type) selection can be re-performed after retrying N times, where N is a positive integer. After introducing the pre-configured resource (which may be regarded as a dedicated periodic resource, or may be a resource shared by a limited number of UEs), the selection order may be according to the network configuration of the packet transmission, preferably pre-configured resource, then select the common resource based on the existing scheme, i.e. select UL/SUL, and then determine to select the two-step or four-step random access procedure.

The UE needs to perform inter-frequency measurement at certain times. In general, the inter-frequency measurement may be triggered according to a configured measurement timing (also called a measurement gap) or when the quality of the current cell is smaller than a certain threshold, where the UE cannot perform data transmission in the current cell, or when the measurement timing (a period of time configured by the network, during which the network considers that the UE is performing measurement and thus does not receive data sent from the UE, but the UE may not perform measurement), the network may not receive the data sent by the UE. In addition, when the UE accesses the unlicensed spectrum, a Listen Before Talk (Listen Before Talk, abbreviated as LBT) process needs to be performed to determine a transmission opportunity, and the UE cannot perform data transmission Before the LBT is performed to determine the transmission opportunity. These may cause the UE to miss the sending opportunity of the preconfigured resource, and if the UE has data to send but does not send due to the above reasons, this situation may be referred to as data transmission collision, and if the data transmission collision occurs, it needs to wait for the next sending opportunity, which may cause a certain delay and may be difficult to meet the UE service sending requirement.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

The technical scheme provided by the embodiment of the invention can be suitable for a 5G communication system, a 4G communication system, a 3G communication system and various subsequent evolution communication systems.

The technical scheme provided by the embodiment of the invention is also suitable for different network architectures, including but not limited to a relay network architecture, a double-link network architecture and a vehicle networking communication architecture.

A Base Station (BS for short) in the embodiments of the present invention may also be referred to as a Base Station device, which is a device deployed in a wireless access network to provide a wireless communication function. For example, devices providing Base station functionality in 2G networks include Base Transceiver Stations (BTSs) and Base Station Controllers (BSCs). The device providing the base station function in the 3G Network includes a node b (nodeb) and a Radio Network Controller (RNC). Apparatuses providing a base station function in a 4G network include Evolved node bs (Evolved nodebs, abbreviated enbs). In a Wireless Local Area Network (WLAN), a device providing a base station function is an Access Point (AP). The device for providing the base station function in the New Radio (NR) of 5G includes a node b (gnb) that continues to evolve, and the base station also refers to a device for providing the base station function in a New communication system in the future, and the like.

A terminal (e.g., a sending terminal and/or a receiving terminal) in the embodiments of the present invention may refer to various forms of User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a Mobile Station (MS), a remote station, a remote terminal, a mobile device, a User terminal, a terminal device (terminal), a wireless communication device, a User agent, or a User Equipment. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with a wireless communication function, a computing device or other processing devices connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network, or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which are not limited in the embodiments of the present invention.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this document indicates that the former and latter related objects are in an "or" relationship.

"plurality" appearing in the embodiments of the present invention means two or more.

The term "connect" in the embodiments of the present invention refers to various connection manners, such as direct connection or indirect connection, to implement communication between devices, which is not limited in this respect.

The expression of "network" and "system" appearing in the embodiments of the present invention is the same concept, and the communication system is a communication network.

The multi-cell operation in the embodiment of the present invention includes, but is not limited to, DC operation, CA operation, MR-DC operation.

Various exemplary embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of methods and systems according to various embodiments of the present disclosure. It should be noted that each block in the flowchart or block diagrams may represent a module, a program segment, or a portion of code, which may include one or more executable instructions for implementing the logical function specified in the respective embodiment. It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. It should also be noted that the sequence numbers of the respective steps in the flowcharts do not represent a limitation on the execution order of the respective steps.

Fig. 4 is a flowchart illustrating a data transmission method of a non-connected UE according to an embodiment of the present invention. The data transmission method may be performed by the UE side, for example, by an NR UE in a non-connected state.

Specifically, the data transmission method may include the steps of:

step S401, receiving pre-configuration information;

step S402, according to the pre-configuration information, using public resources to transmit the data packet to be transmitted.

More specifically, the base station may send the pre-configuration information to the UE so that a non-connected UE capable of employing the pre-configuration resource may fall back to employing the common resource or performing data transmission based on the RACH contention resource. The pre-configured resource includes, but is not limited to, dedicated resources such as PUR, CG, etc., or may be a resource allocated by the UE to different common resources based on ID or other forms, so as to be non-contention, or may be a dedicated resource allocated for EDT.

In step S401, the UE may receive the provisioning information from the base station. The pre-configuration information may be used to indicate that the network allows the UE to transmit the data packet to be transmitted based on the common resource.

The common resource refers to an uplink transmission resource that can be used by multiple UEs, and may be an uplink transmission resource selected by different UEs using the same rule. The common resources may include, but are not limited to, one or more of the following: a two-step RACH resource, an advance data transmission resource, a four-step RACH resource, a contention-based uplink transmission resource, wherein the advance data transmission resource uses the contention-based resource.

In one embodiment, the base station may transmit the preconfiguration information based on an RRC connection release message and/or system information. Accordingly, the UE may receive the provisioning information based on the RRC connection release message and/or the system information.

In one embodiment, the preconfigured information may include one or more of: presetting a threshold for data time delay; presetting a threshold for network load; service information; and (4) indicating rollback. Further, the provisioning information may also include a bandwidth that the network is provisioned for. When the preconfigured information includes the bandwidth preconfigured by the network, the UE may switch to the bandwidth preconfigured by the network when the BWP to which the preconfigured resource issued by the network belongs does not have the common resource, and transmit the data packet to be transmitted using the common resource of the bandwidth preconfigured by the network.

The rollback instruction is used for indicating that a network allows the UE to transmit the data packet to be transmitted by adopting the common resource, and/or indicating that the network allows the UE to transmit the data packet to be transmitted by adopting the common resource for the maximum times. For example, the back-off indication occupies 1 bit, where the 1 bit is used to indicate whether the network allows the UE to transmit the data packet to be transmitted using the common resource, or indicate whether the network allows the UE to transmit the data packet to be transmitted using the common resource once. For another example, the back-off indication occupies multiple bits, where the multiple bits are used to indicate that the network allows the UE to transmit the data packet to be transmitted using the common resource, and different bit values are used to indicate the maximum number of times that the network allows the UE to transmit the data packet to be transmitted using the common resource.

In specific implementation, the preset data delay threshold refers to a preset delay threshold to be allowed to be backed off, and when the delay requirement of the data to be transmitted is less than or equal to the threshold, the UE is allowed to transmit the data packet to be transmitted by using a common resource. Otherwise, when the delay requirement of the data to be transmitted is greater than the threshold, the UE may wait until the next preconfigured resource comes, and then transmit the data packet to be transmitted. Or when the time delay requirement of the data to be transmitted is less than or equal to the threshold and the next preconfigured resource cannot meet the service requirement of the data to be transmitted, the UE is allowed to transmit the data to be transmitted by adopting the public resource.

In specific implementation, the network load preset threshold refers to a load threshold preset by a network, when data transmission collision occurs to the UE and data to be transmitted needs to be sent, the UE broadcasts a current cell load value according to a current network load condition, for example, the network, or the UE may obtain the value from other manners, and when the value is less than or equal to the network load preset threshold, the UE is allowed to send the data packet to be transmitted by using a common resource. Otherwise, the UE may wait until the next preconfigured resource is due for retransmission of the data packet to be transmitted. Or if the current load condition of the network is lower than the preset threshold of the network load and the next preconfigured resource cannot meet the service requirement of the data to be transmitted, allowing the UE to transmit the data to be transmitted by adopting common resources.

In a specific implementation, the service information may include one or more of the following: a logical channel identification; radio Bearer (RB) identity; an access category (access category) identification; and accessing the identification. The RBs may include Data radio bearers (Data RBs, DRBs) and Signaling radio bearers SRBs (Signaling RBs, SRBs). The access category may include, but is not limited to, a category (category) value for access control, or a cause value for access, etc.

In an embodiment, if the preconfigured information includes logical channel identifiers, which may be one or more logical channel identifiers, or a logical channel identifier list, and the logical channel identifier associated with the data packet to be transmitted belongs to the logical channel list, the UE is allowed to transmit the data packet to be transmitted using common resources. Otherwise, the UE may wait until the next preconfigured resource is due for retransmission of the data packet to be transmitted. Or the logical channel identifier of the data packet to be transmitted belongs to the logical channel list, the UE may send the data packet to be transmitted by using a common resource when the next preconfigured resource cannot meet the service requirement of the data to be transmitted.

In one embodiment, if the preconfigured information includes an RB identifier, which may be one or more RB identifiers or an RB identifier list, and the RB identifier associated with the to-be-transmitted data packet belongs to the RB identifier in the configuration information, the UE is allowed to transmit the to-be-transmitted data packet using common resources. Otherwise, the UE may wait until the next preconfigured resource is due for retransmission of the data packet to be transmitted. Or the RB identifier associated with the data packet to be transmitted belongs to the RB identifier of the configuration information, the UE may send the data packet to be transmitted by using a common resource when the next preconfigured resource cannot meet the service requirement of the data to be transmitted.

In an embodiment, if the preconfigured information includes an access category identifier, which may be one or more access category identifiers or an access category identifier list, and the access category identifier corresponding to the to-be-transmitted data packet belongs to the access category identifier corresponding to the configured information, the UE is allowed to transmit the to-be-transmitted data packet using a common resource. Otherwise, the UE may wait until the next preconfigured resource is due for retransmission of the data packet to be transmitted. Or the access type identifier corresponding to the data packet to be transmitted belongs to the access type identifier of the configuration information, the UE may send the data packet to be transmitted by using a common resource when the next preconfigured resource cannot meet the service requirement of the data packet to be transmitted.

In an embodiment, the access identifier, that is, the access identity, may be used to indicate an access class (access class) or user class information of the UE, and if the preconfigured information includes an access identifier, which may be one or more access identifiers or an access identifier list, and the access identifier corresponding to the to-be-transmitted packet belongs to the access identifier of the configuration information, the UE is allowed to transmit the to-be-transmitted packet by using a common resource. Otherwise, the UE may wait until the next preconfigured resource is due for retransmission of the data packet to be transmitted. Or the access identifier corresponding to the data packet to be transmitted belongs to the access identifier of the configuration information, the UE may send the data packet to be transmitted by using a common resource when the next preconfigured resource cannot meet the service requirement of the data packet to be transmitted.

Those skilled in the art understand that when the UE is in the unconnected state and the UE has the data packet to be transmitted, the UE just meets the measurement condition, and the UE will not transmit the data packet to be transmitted but perform measurement. Or, the UE is deployed in the unlicensed frequency band, and when the UE is in the non-connected state and has the data packet to be transmitted, the UE needs to perform listen before talk operation in the unlicensed frequency band without transmitting the data packet to be transmitted. Or, when the UE is in the non-connected state and has the data packet to be transmitted, the UE is just in the measurement gap period, and the UE will not transmit the data packet to be transmitted.

After the measurement or LBT or measurement gap is completed, if the UE knows from the received preconfigured information that the UE can transmit the data packet to be transmitted using the common resource, the UE may first determine whether a next preconfigured resource for sending the data packet to be transmitted satisfies a preset service requirement, and if the determination result indicates that the preset service requirement is not satisfied, the UE may attempt to transmit the data packet to be transmitted based on the common resource. Otherwise, if the judgment result indicates that the preset service requirement is met, the UE may abandon sending using the common resource and transmit the data packet to be transmitted by using the pre-configured resource. In a specific implementation, if the preconfigured information includes a back-off indication and the maximum number of times represented by the back-off indication is 1, the UE needs to wait for a next preconfigured resource to transmit the data packet to be transmitted after the UE fails to transmit the data packet to be transmitted based on the common resource.

In a specific implementation, if the preconfigured information includes a back-off indication, and the maximum number of times represented by the back-off indication is N, N >1, and N is a positive integer, the UE may determine whether a preconfigured resource is available after the UE fails to transmit the packet to be transmitted based on the common resource. When the preconfigured resource is unavailable and the number of times the common resource is used to transmit the data packet to be transmitted is less than N, the UE may continue to transmit the data packet to be transmitted based on the common resource. Or after the transmission of the data package to be transmitted based on the common resource fails, the UE may directly transmit the data package to be transmitted using the common resource when the number of times of transmitting the data package to be transmitted using the common resource is less than N. Further, if the pre-configured resource is available, the UE may transmit the data packet to be transmitted using the pre-configured resource. Wherein, whether the preconfigured resource is available refers to judging whether the service requirement of the data packet to be transmitted is met by using the preconfigured resource.

In specific implementation, if the preconfigured information only includes a backoff indicator, the UE performs backoff according to the backoff indicator after data transmission collision occurs, and transmits the data packet to be transmitted by using a common resource through the common resource. Or, if the pre-configuration information includes a plurality of: presetting a threshold for data time delay; presetting a threshold for network load; service information; and the back-off indication is carried out, the UE judges according to the conditions, and when the information is met, the common resource can be used for transmitting the data packet to be transmitted by adopting the common resource. In a specific implementation, the selected transmission resource meets the service requirements of the data packet to be transmitted, including the requirements of time delay, data volume and the like. The common resource selected by the UE is required to satisfy the service requirement that the transmission resource can satisfy the data packet to be transmitted.

In an embodiment, if the Bandwidth Part (BWP) to which the preconfigured resource belongs does not have the common resource, the UE may switch to an uplink initial Bandwidth or a Bandwidth preconfigured by the network, and transmit the to-be-transmitted data packet using the common resource of the uplink initial Bandwidth or the Bandwidth preconfigured by the network. Wherein the uplink initial bandwidth refers to a bandwidth used when the UE initially accesses the network, and the bandwidth preconfigured by the network is a bandwidth specified by the network in the provisioning information. Further, in some cases, the pre-configured resources may be available in one or more cells. If the UE performs cell reselection from the serving cell to another cell, when the preconfigured Information in the RRC connection release message received by the UE in the serving cell is different from the preconfigured Information in the System Information (SI) received in the other cell, the UE may use the System Information of the other cell as a reference. Transmitting data based on preconfigured information in the system information in a non-connected state. Wherein the other cell refers to a cell other than the serving cell, and the UE in the other cell can use the pre-configured resource. Or if the preconfigured information in the RRC connection release message received at the serving cell contains valid information, such as the valid information is a cell list, if the reselected other cell is contained in the list, the data transmission fallback transmission can still be performed using the preconfigured information.

For example, it is assumed that the preconfigured resources are valid in the serving cell a and the cell B where the UE is located, in other words, the preconfigured resources of the serving cell a and the cell B are the same resource. Under this condition, if the UE performs cell reselection from the serving cell a to the cell B, if the preconfigured information received by the UE in the serving cell a and the preconfigured information in the SIB received by the UE in the cell B conflict, the UE may control the SIB of the cell B.

Further, when selecting the common resource for transmission, the selected common resource needs to meet the service requirements, including the requirements of time delay, data amount, etc., regardless of the type (type) of the selected common resource, which may include, but is not limited to, a two-step RACH resource, a four-step RACH resource, an EDT resource, a contention-based resource, etc.

Fig. 5 is a flowchart illustrating a data receiving method of a non-connected UE according to an embodiment of the present invention. The data receiving method may be performed by the network side, for example, by the NR gNB. Specifically, the data receiving method may include the steps of:

step S501, sending pre-configuration information;

step S502, receiving the data packet to be transmitted by using the public resource.

More specifically, in step S501, the base station may transmit the provisioning information to the UE. The pre-configuration information may be used to indicate that the network allows the UE to transmit the data packet to be transmitted based on the common resource.

In one embodiment, the preconfigured information may include one or more of: presetting a threshold for data time delay; presetting a threshold for network load; service information; and a fallback indication, where the fallback indication is used to indicate that a network allows the UE to transmit the data packet to be transmitted using the common resource, and/or is used to indicate a maximum number of times that the network allows the UE to transmit the data packet to be transmitted using the common resource.

Wherein the service information may include one or more of the following: a logical channel identification; a radio bearer identity; accessing a category identification; and accessing the identification.

In one embodiment, the base station may transmit the preconfiguration information based on an RRC connection release message and/or system information.

In step S502, the base station may receive a data packet to be transmitted uploaded by the UE using the common resource. In one embodiment, the common resource may include one or more of: two-step RACH resources, advanced data transmission resources, four-step RACH resources and contention-based uplink transmission resources.

Those skilled in the art understand that the steps S501 and S502 can be regarded as execution steps corresponding to the steps S401 to S402 in the embodiment shown in fig. 4, and they are complementary in specific implementation principle and logic. Therefore, for a data receiving method on the network side, reference may be made to the related description of the embodiment shown in fig. 4, which is not described herein again.

The following describes a specific embodiment of the present invention by taking an example that an unconnected UE (e.g., an inactive UE) has a data packet to be transmitted. If an unconnected UE (e.g., an inactive UE) has a data packet to transmit and needs to complete a measurement, the UE may first perform the measurement. Alternatively, if an unconnected UE (e.g., an inactive UE) has a data packet to transmit and the UE is deployed in an unlicensed frequency band, the UE may perform LBT operation first. Then, if the next preconfigured resource of the UE does not meet the service requirement of the data packet to be transmitted, the UE may return to the RACH/EDT procedure, perform the two-step RACH procedure, the four-step RACH procedure, or the EDT procedure, so as to send the data packet to be transmitted.

Reference may be made in particular to fig. 6. Fig. 6 is a schematic signaling interaction diagram in a typical scenario according to an embodiment of the present invention. Wherein, the user equipment 1 is located in the serving cell of the base station 2. The base station 2 configures a pre-configured resource for the ue 1 in advance, so as to send data (not shown) when the ue 1 is in the non-connected state. In this condition, first, the base station 2 may perform operation S1, i.e., the base station 2 transmits the provisioning information to the user equipment 1. The pre-configuration information can carry relevant information for allowing the UE to fall back to the RACH/EDT through RRC connection release message and/or system information so as to configure the fall-back condition.

In one embodiment, the pre-configuration information is used to indicate that the network allows the UE to transmit the data packet to be transmitted based on the common resource. The preconfigured information may include one or more of: a data delay threshold; presetting a threshold for network load; service information; and a back-off indication, wherein the back-off indication is used for indicating that a network allows the UE to transmit the data packet to be transmitted by using the common resource, and/or indicating that the network allows the UE to transmit the data packet to be transmitted by using the common resource for the maximum number of times. Wherein the service information may include one or more of the following: a logical channel identification; a radio bearer identity; accessing a category identification; and accessing the identification. The base station 2 allows some data to be transmitted of the non-connected user equipment 1 to adopt the pre-configured resource or the common resource for transmission.

Second, the user equipment 1 enters the unconnected state. When the user equipment 1 has a data packet to be transmitted, operation S2 needs to be performed, that is, the user equipment 1 performs measurement, or performs LBT operation, or happens to be in a measurement gap and does not perform data transmission.

Again, the user equipment 1 performs operation S3, that is, the user equipment 1 determines whether the next preconfigured resource can meet the service requirement of the data packet to be transmitted.

Then, if the result of the determination by the ue 1 indicates that the next preconfigured resource cannot meet the service requirement of the data packet to be transmitted and meets the condition given by the preconfigured information, the ue 1 performs operation S4, that is, sends the data packet to be transmitted by using a common resource. The common resource may include, but is not limited to, a two-step RACH resource, a four-step RACH resource, an EDT resource, a contention-based resource, and the like.

Further, the preconfigured information may include a back-off indication, where the back-off indication may indicate a maximum number of times that the network allows the UE to transmit the data packet to be transmitted using the common resource, and/or indicate that the network allows the UE to transmit the data packet to be transmitted using the common resource. If the backoff indicator indicates that the maximum number of times that the network allows the UE to transmit the to-be-transmitted data packet using the common resource is 1, the UE 1 may perform operation S51 after the failure of transmission using the common resource, that is, wait for a next preconfigured resource, and transmit the to-be-transmitted data packet based on the next preconfigured resource.

Or, if the backoff indicator is used to indicate that the maximum number of times that the network allows the UE to transmit the to-be-transmitted data packet using the common resource is N, where N is a positive integer greater than 1, then the UE 1 may perform operation S52 before the transmission fails using the common resource but does not reach the maximum number of times and the sending opportunity of the next preconfigured resource is reached, that is, continue to retransmit and transmit the to-be-transmitted data packet based on the common resource.

For more contents of the working principles and working modes of the user equipment 1 and the base station 2 in the application scenario shown in fig. 6, reference may be made to the related descriptions in fig. 4 and fig. 5, which are not repeated herein.

In summary, the embodiment of the present invention returns to the scheme of sending the data packet to be transmitted by using the common resource without waiting for the next time of pre-configuring the resource (or dedicated resource), thereby ensuring the service transmission requirement of the UE, reducing the time delay caused by the state transition, and improving the data transmission efficiency.

Fig. 7 is a schematic structural diagram of a data transmission apparatus for a non-connected UE according to an embodiment of the present invention. The data transmission device 7 may implement the method solutions shown in fig. 4 and fig. 6, and is executed by the UE. Specifically, the data transmission device 7 may include: a receiving module 71, configured to receive preconfigured information; and the transmission module 72 is configured to transmit the data packet to be transmitted by using the common resource according to the preconfigured information.

For more details on the operation principle and the operation mode of the data transmission device 7, reference may be made to the related descriptions in fig. 4 and fig. 6, and details are not repeated here.

Fig. 8 is a schematic structural diagram of a data receiving apparatus of a non-connected UE according to an embodiment of the present invention. The data receiving apparatus 8 may implement the method technical solutions shown in fig. 5 and fig. 6, and is executed by a network side device. Specifically, the data receiving apparatus 8 may include: a sending module 81, configured to send preconfigured information; the receiving module 82 is configured to receive a data packet to be transmitted, where the data packet is transmitted using a common resource.

For more details of the operation principle and the operation mode of the data receiving device 8, reference may be made to the description of the technical solutions in fig. 5 and fig. 6, which is not repeated herein.

Further, the embodiment of the present invention also discloses a storage medium, on which computer instructions are stored, and when the computer instructions are executed, the method technical solution described in the embodiment shown in fig. 4 or the method technical solution described in the embodiment shown in fig. 6 is executed. Preferably, the storage medium may include a computer-readable storage medium such as a non-volatile (non-volatile) memory or a non-transitory (non-transient) memory. The computer readable storage medium may include ROM, RAM, magnetic or optical disks, and the like.

It should be understood that, in the embodiment of the present invention, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also be appreciated that the memory in embodiments of the invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. The volatile memory may be a Random Access Memory (RAM) which serves as an external cache. By way of illustration and not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and Direct RAM (DR-RAM).

The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. The procedures or functions according to the embodiments of the present invention are wholly or partially generated when the computer instructions or the computer program are loaded or executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more collections of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.

Further, an embodiment of the present invention further discloses a terminal, which includes a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the technical solutions of the methods in the embodiments shown in fig. 4 and fig. 6 when executing the computer instructions. Preferably, the terminal may be an NR UE.

Further, the embodiment of the present invention further discloses a base station, which includes a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the computer instructions to execute the technical solutions of the methods in the embodiments shown in fig. 5 and fig. 6. Preferably, the base station may be an NR base station.

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

1. A method for transmitting data of a UE in a non-connected state is characterized by comprising the following steps:

receiving pre-configuration information;

and transmitting the data packet to be transmitted by using the public resource according to the pre-configuration information.

2. The data transmission method according to claim 1, wherein the preconfiguration information is used to indicate that the network allows the UE to transmit the data packet to be transmitted based on the common resource.

3. The data transmission method of claim 1, wherein the preconfigured information includes one or more of:

presetting a threshold for data time delay; presetting a threshold for network load; service information; and a fallback indication, where the fallback indication is used to indicate that a network allows the UE to transmit the data packet to be transmitted using the common resource, and/or is used to indicate a maximum number of times that the network allows the UE to transmit the data packet to be transmitted using the common resource.

4. The data transmission method according to claim 3, wherein the service information includes one or more of the following: a logical channel identification; a radio bearer identity; accessing a category identification; and accessing the identification.

5. The data transmission method according to claim 3, wherein the maximum number of times is greater than 1, the data transmission method further comprising:

if the data packet to be transmitted fails to be transmitted based on the public resource, judging whether a pre-configured resource is available;

and when the pre-configured resources are unavailable and the times of transmitting the data packet to be transmitted by using the public resources are less than the maximum times, continuing to transmit the data packet to be transmitted based on the public resources.

6. The data transmission method according to claim 5, further comprising:

and when the pre-configuration resource is available, transmitting the data packet to be transmitted by adopting the pre-configuration resource.

7. The data transmission method according to any one of claims 1 to 6, wherein the receiving pre-configuration information comprises:

receiving the provisioning information based on an RRC connection release message and/or system information.

8. The data transmission method according to claim 7, further comprising:

if cell reselection is performed from a serving cell to a preset specific cell, when preconfigured information in the RRC connection release message is different from preconfigured information in the system information, based on the system information of the preset specific cell;

wherein the preset specific cell refers to other cells except the serving cell, and the UE in the preset specific cell can use the preconfigured resource.

9. The data transmission method according to any one of claims 1 to 6, wherein the transmitting the data packet to be transmitted by using the common resource comprises:

judging whether the next pre-configured resource for sending the data packet to be transmitted meets the preset service requirement or not;

and if the preset service requirement is not met, transmitting the data packet to be transmitted based on the public resource.

10. The data transmission method according to claim 9, wherein the transmitting the data packet to be transmitted based on the common resource comprises:

and if the BWP to which the pre-configured resource belongs does not have the public resource, switching to an uplink initial bandwidth or a bandwidth pre-configured by a network, and transmitting the data packet to be transmitted by using the public resource of the uplink initial bandwidth or the bandwidth pre-configured by the network.

11. The data transmission method according to any one of claims 1 to 6, wherein before transmitting the data packet to be transmitted using the common resource, the data transmission method further comprises:

and when the data packet to be transmitted exists, performing measurement or performing listening-before-speaking in an unlicensed frequency band or not transmitting the data packet to be transmitted in a measurement gap.

12. The data transmission method according to any one of claims 1 to 6, wherein the common resource comprises one or more of: two-step RACH resources, advanced data transmission resources, four-step RACH resources, and contention-based uplink transmission resources.

13. A data receiving method of a non-connected UE is characterized by comprising the following steps:

sending pre-configuration information;

and receiving the data packet to be transmitted by using the common resource.

14. The data receiving method as claimed in claim 13, wherein the preconfiguration information is used to indicate that the network allows the UE to transmit the data packet to be transmitted based on the common resource.

15. The data receiving method according to claim 13, wherein the preconfigured information comprises one or more of:

16. The data receiving method according to claim 15, wherein the service information comprises one or more of the following: a logical channel identification; a radio bearer identity; accessing a category identification; and accessing the identification.

17. The data receiving method according to any one of claims 13 to 16, wherein the sending preconfigured information comprises:

transmitting the provisioning information based on an RRC connection release message and/or system information.

18. The data receiving method according to any of claims 13 to 16, wherein the common resource comprises one or more of: two-step RACH resources, advanced data transmission resources, four-step RACH resources and contention-based uplink transmission resources.

19. A data transmission device of a non-connected UE, comprising:

a receiving module for receiving pre-configuration information;

and the transmission module is used for transmitting the data packet to be transmitted by using the public resource according to the pre-configuration information.

20. A data receiving device of a non-connected UE, comprising:

a sending module, configured to send preconfigured information;

and the receiving module is used for receiving the data packet to be transmitted by using the public resource.

21. A storage medium having stored thereon computer instructions, wherein the computer instructions when executed perform the steps of the method of any of claims 1 to 12 or any of claims 13 to 18.

22. A terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the method of any one of claims 1 to 12.

23. A base station comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the method of any one of claims 13 to 18.