WO2022152058A1

WO2022152058A1 - Method for allocating resource for small data transmission, terminal, and network side device

Info

Publication number: WO2022152058A1
Application number: PCT/CN2022/070737
Authority: WO
Inventors: 周雷; 王磊; 费永强
Original assignee: 大唐移动通信设备有限公司
Priority date: 2021-01-15
Filing date: 2022-01-07
Publication date: 2022-07-21
Also published as: CN114765876A

Abstract

Disclosed in the present invention are a method for allocating a resource for small data transmission, a terminal, and a network side device, used for solving the problem of PDCCH resource scheduling blocking between a small data terminal and a common terminal caused by long-time occupation of a Type 1-PDCCH resource by the small data terminal and the problem of PDCCH resource scheduling blocking between broadcast information and information on demand. The method comprises: before entering a connected state, a terminal determines resource configuration information of a dedicated search space for transmitting small data, wherein the small data is used for representing data, the data volume of which is less than a threshold; the terminal determines, according to the resource configuration information of the dedicated search space, a physical downlink control channel (PDCCH) resource for transmitting the small data.

Description

A resource allocation method, terminal and network side device for small data transmission

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application filed on January 15, 2021, with the application number of 202110057595.4 and the application title of "A Resource Allocation Method, Terminal and Network Side Equipment for Small Data Transmission", all of which are The contents are incorporated herein by reference.

technical field

The present invention relates to the technical field of wireless communication, and in particular, to a resource allocation method, terminal and network side device for small data transmission.

Background technique

Since the small data terminal (Small data UE) hopes to continuously send uplink data in the initial access stage (ie, before entering the connected state), the base station in the prior art can only use Type1-PDCCH (Physical Downlink Control Channel, physical downlink control channel) CSS (Common Search Space, common search space) is used to schedule small data transmission, so if a large number of Small data UEs have small data transmission requirements for a long time, they will occupy Type1-PDCCH CSS resources for a long time. , it will cause a large load in the Type1-PDCCH CSS, PDCCH scheduling blocking problems between UEs (that is, between normal UEs or small data UEs) and PDCCH between broadcast (broadcast) information and on-demand (unicast) information. Scheduling blocking problems.

SUMMARY OF THE INVENTION

The present invention provides a resource allocation method, terminal and network side equipment for small data transmission, which are used to solve the problem of PDCCH resource scheduling congestion between small data terminals and ordinary terminals caused by the long-time occupation of Type1-PDCCH resources by small data terminals and broadcast PDCCH resource scheduling blocking problem between information and on-demand information.

In a first aspect, a resource allocation method for small data transmission provided by an embodiment of the present invention includes:

Before entering the connection state, the terminal determines the resource configuration information of the dedicated search space for transmitting small data, wherein the small data is used to represent data whose data amount is less than a threshold;

The terminal determines the physical downlink control channel PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space.

This embodiment of the present invention transmits small data through PDCCH resources in the dedicated search space. The dedicated search space in this embodiment is different from the public search space, that is, the small data terminal in the embodiment of the present invention does not need to occupy the public space when continuously sending data. The PDCCH resources in the search space can avoid the scheduling blocking problem of PDCCH resources between UEs and the scheduling blocking problem of PDCCH resources between broadcast information and on-demand information to a certain extent.

As an optional implementation manner, the terminal determines the resource configuration information of the dedicated search space for transmitting small data, including:

The terminal determines the resource configuration information of the dedicated search space for transmitting small data according to the resource configuration information of the predefined at least one dedicated search space; and/or,

The terminal determines the resource configuration information of the dedicated search space for transmitting small data according to the received explicit signaling carrying the resource configuration information of at least one dedicated search space, where the explicit signaling includes broadcast signaling or dedicated signaling.

As an optional implementation manner, the resource configuration information of the dedicated search space is multiple, and each resource configuration information corresponds to a unique resource configuration information number;

The terminal determines the resource configuration information of the dedicated search space for transmitting small data, including:

The terminal determines the resource configuration information corresponding to the RO number from the plurality of resource configuration information according to the mapping relationship between the random access occasion RO number selected by sending the random access preamble preamble and the resource configuration information number ;or,

The terminal determines the resource configuration information corresponding to the SSB index value from the plurality of resource configuration information according to the received synchronization signal and the mapping relationship between the physical broadcast channel block SSB index value and the resource configuration information number; or ,

The terminal determines resource configuration information corresponding to the indication information from the plurality of resource configuration information according to the indication information carried in the received contention resolution message Msg4 or MsgB.

As an optional implementation manner, the resource configuration information includes any one or more of the following:

the aggregation level AL of the dedicated search space;

The number of candidates of the PDCCH candidate set corresponding to each AL of the dedicated search space;

blind detection period parameters of the dedicated search space;

The control resource set CORESET corresponding to the dedicated search space.

As an optional implementation manner, the terminal determines the PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space, including:

The terminal determines the CORESET corresponding to the dedicated search space according to the resource configuration information;

In the CORESET, the terminal determines the PDCCH resource according to the wireless network temporary identifier RNTI of the terminal, the AL of the dedicated search space, and the number of PDCCH candidates corresponding to the AL, wherein the RNTI includes a temporary The cell radio network temporary identifier TC-RNTI or the cell radio network temporary identifier C-RNTI.

As an optional implementation manner, the terminal determining the PDCCH resource includes:

The terminal uses the RNTI as a randomization parameter of the hash function, and determines the PDCCH resource for transmitting the small data in the search space according to the AL and the number of PDCCH candidates corresponding to the AL based on the hash function.

As an optional implementation manner, after the terminal determines the PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space, the method further includes:

The terminal detects and receives the downlink control information DCI of the small data in the dedicated search space, wherein the cyclic redundancy check CRC of the DCI is obtained by scrambling the C-RNTI of the terminal.

As an optional implementation manner, after the terminal determines the physical downlink control channel PDCCH resource for transmitting the small data, the method further includes:

The terminal transmits the small data on the determined PDCCH resource after receiving Msg2 or Msg4 or MsgB; or,

The terminal transmits the small data on the determined PDCCH resource before sending Msg1 or Msg3 or MsgA.

The terminal stops monitoring the PDCCH resource after receiving the RRC release signaling; or,

After receiving the resource configuration information of the user-specific search space USS and/or the type type3 common search space CSS, the terminal stops monitoring the PDCCH resource.

As an optional implementation manner, after the terminal determines the PDCCH resource for transmitting the small data before entering the connected state for the first time, the method further includes:

Before entering the connected state next time, the terminal transmits the small data according to the PDCCH resource determined before entering the connected state for the first time.

As an optional implementation manner, after the terminal enters the connected state this time and before entering the connected state next time, the terminal further includes:

The terminal transmits the small data according to the resource configuration information determined after entering the connected state this time; or,

The terminal transmits the small data according to the received indication signaling, wherein the indication signaling is used to instruct the terminal to transmit the small data according to the resource configuration information determined after entering the connected state this time.

In a second aspect, a resource allocation method for small data transmission provided by an embodiment of the present invention includes:

Before determining that the terminal enters the connected state, the base station determines the resource configuration information of the dedicated search space for transmitting small data of the terminal, wherein the small data is used to represent data whose data amount is less than a threshold;

The base station determines the physical downlink control channel PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space.

As an optional implementation manner, the base station determines the resource configuration information of the dedicated search space for transmitting the small data of the terminal, including:

The base station determines the resource configuration information of the dedicated search space for transmitting the small data of the terminal according to the resource configuration information of the predefined at least one dedicated search space.

The base station determines the resource configuration information of the dedicated search space for transmitting the small data of the terminal, including:

The base station determines the resource configuration information corresponding to the RO number from the plurality of resource configuration information according to the mapping relationship between the received random access opportunity RO number and the resource configuration information number; or,

The base station determines the resource configuration information corresponding to the SSB index value from the plurality of resource configuration information according to the mapping relationship between the synchronization signal and the physical broadcast channel block SSB index value and the resource configuration information number; or,

The base station itself determines resource configuration information from the plurality of resource configuration information.

the aggregation level AL of the dedicated search space;

blind detection period parameters of the dedicated search space;

The control resource set CORESET corresponding to the dedicated search space.

As an optional implementation manner, the base station determines the PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space, including:

The base station determines the CORESET corresponding to the dedicated search space according to the resource configuration information;

In the CORESET, the base station determines the PDCCH resource according to the determined RNTI of the terminal, the AL of the dedicated search space, and the number of PDCCH candidates corresponding to the AL, wherein the wireless network temporarily identifies the RNTI. Including the temporary cell radio network temporary identifier TC-RNTI or the cell radio network temporary identifier C-RNTI.

As an optional implementation manner, the base station determines the PDCCH resource, including:

The base station uses the RNTI as the randomization parameter of the hash function, and determines the PDCCH resource for transmitting the small data in the search space according to the AL and the number of PDCCH candidates corresponding to the AL based on the hash function.

As an optional implementation manner, after the base station determines the resource configuration information of the dedicated search space for transmitting the small data of the terminal, the method further includes:

The base station sends the at least one resource configuration information to the terminal through display signaling, where the display signaling includes broadcast signaling or dedicated signaling; or,

The base station sends the at least one resource configuration information to the terminal through a contention resolution message Msg4 or MsgB.

As an optional implementation manner, after the base station determines the PDCCH resource for transmitting the small data, the method further includes:

The base station sends the downlink control information DCI of the small data in the dedicated search space, wherein the cyclic redundancy check (CRC) of the DCI is obtained by scrambling the C-RNTI of the terminal.

After sending Msg2 or Msg4 or MsgB, the base station starts to send DCI, wherein the DCI is carried by the PDCCH resource; or,

After receiving the Msg1 or Msg3 or MsgA, the base station starts to transmit DCI, wherein the DCI is carried by the PDCCH resource.

The base station stops sending DCI after sending the RRC release signaling, wherein the DCI is carried by the PDCCH resource; or,

After sending the resource configuration information of the user-specific search space USS and/or the type-3 common search space CSS, the base station stops sending DCI, where the DCI is borne by the PDCCH resource.

As an optional implementation manner, before determining that the terminal enters the connected state for the first time, after determining the PDCCH resource for transmitting the small data, the base station further includes:

The base station determines that before the terminal enters the connected state next time, the small data is transmitted according to the PDCCH resource determined before the first entry into the connected state.

As an optional implementation manner, after determining that the terminal enters the connected state this time and before entering the connected state next time, the base station further includes:

The base station transmits the small data according to the resource configuration information determined after the terminal enters the connected state this time; and/or,

The base station sends the instruction signaling to instruct the terminal to transmit the small data according to the resource configuration information determined after entering the connected state this time before entering the connected state next time.

In a third aspect, an embodiment of the present invention further provides a resource allocation terminal for small data transmission, the terminal includes a processor and a memory, where the memory is used for storing a program executable by the processor, and the processor is used for reading The program in the memory and perform the following steps:

Before entering the connection state, determine the resource configuration information of the dedicated search space for transmitting small data, wherein the small data is used to represent data whose data amount is less than a threshold;

Determine the physical downlink control channel PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space.

As an optional implementation manner, the processor is specifically configured to execute:

Determine the resource configuration information of the dedicated search space for transmitting small data according to the predefined resource configuration information of at least one dedicated search space; and/or,

Determine the resource configuration information of the dedicated search space for transmitting small data according to the received explicit signaling carrying the resource configuration information of at least one dedicated search space, where the explicit signaling includes broadcast signaling or dedicated signaling.

The processor is specifically configured to execute:

According to the mapping relationship between the random access occasion RO number selected by sending the random access preamble preamble and the resource configuration information number, the resource configuration information corresponding to the RO number is determined from the plurality of resource configuration information; or,

Determine the resource configuration information corresponding to the SSB index value from the plurality of resource configuration information according to the mapping relationship between the received synchronization signal and the physical broadcast channel block SSB index value and the resource configuration information number; or,

According to the indication information carried in the received contention resolution message Msg4 or MsgB, the resource configuration information corresponding to the indication information is determined from the plurality of resource configuration information.

the aggregation level AL of the dedicated search space;

blind detection period parameters of the dedicated search space;

The control resource set CORESET corresponding to the dedicated search space.

Determine the CORESET corresponding to the dedicated search space according to the resource configuration information;

In the CORESET, the PDCCH resource is determined according to the wireless network temporary identifier RNTI of the terminal, the AL of the dedicated search space, and the number of PDCCH candidates corresponding to the AL, where the RNTI includes a temporary cell wireless network The temporary identifier TC-RNTI or the cell radio network temporary identifier C-RNTI.

The RNTI is used as the randomization parameter of the hash function, and the PDCCH resources for transmitting the small data in the search space are determined according to the AL and the number of PDCCH candidates corresponding to the AL based on the hash function.

As an optional implementation manner, after determining the PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space, the processor is specifically further configured to execute:

The downlink control information DCI of the small data is detected and received in the dedicated search space, wherein the cyclic redundancy check CRC of the DCI is obtained by scrambling the C-RNTI of the terminal.

As an optional implementation manner, after determining the physical downlink control channel PDCCH resource for transmitting the small data, the processor is specifically further configured to execute:

After receiving Msg2 or Msg4 or MsgB, start monitoring the PDCCH resource; or,

Before sending Msg1 or Msg3 or MsgA, start monitoring the PDCCH resource.

After receiving the RRC release signaling, stop monitoring the PDCCH resource; or,

After receiving the resource configuration information of the user-specific search space USS and/or the type-3 public search space CSS, the monitoring of the PDCCH resource is stopped.

As an optional implementation manner, after the PDCCH resource for transmitting the small data is determined before entering the connected state for the first time, the processor is specifically further configured to execute:

Before entering the connected state next time, the small data is transmitted according to the PDCCH resource determined before entering the connected state for the first time.

As an optional implementation manner, after entering the connected state this time and before entering the connected state next time, the processor is specifically further configured to execute:

The small data is transmitted according to the resource configuration information determined after entering the connected state this time; or,

The small data is transmitted according to the received indication signaling, wherein the indication signaling is used to instruct the terminal to transmit the small data according to the resource configuration information determined after entering the connected state this time.

In a fourth aspect, an embodiment of the present invention further provides a network-side device for resource allocation for small data transmission, where the network-side device includes a processor and a memory, where the memory is used to store a program executable by the processor, and the process The device is used to read the program in the memory and perform the following steps:

Before it is determined that the terminal enters the connected state, the resource configuration information of the dedicated search space for transmitting small data of the terminal is determined, wherein the small data is used to represent data whose data amount is less than a threshold;

The resource configuration information of the dedicated search space for transmitting the small data of the terminal is determined according to the resource configuration information of the predefined at least one dedicated search space.

The processor is specifically configured to execute:

Determine the resource configuration information corresponding to the RO number from the plurality of resource configuration information according to the mapping relationship between the received random access opportunity RO number and the resource configuration information number; or,

Determine the resource configuration information corresponding to the SSB index value from the plurality of resource configuration information according to the mapping relationship between the synchronization signal and the physical broadcast channel block SSB index value and the resource configuration information number; or,

The resource configuration information is determined by itself from the plurality of resource configuration information.

the aggregation level AL of the dedicated search space;

blind detection period parameters of the dedicated search space;

The control resource set CORESET corresponding to the dedicated search space.

In the CORESET, the PDCCH resource is determined according to the determined RNTI of the terminal, the AL of the dedicated search space, and the number of PDCCH candidates corresponding to the AL, wherein the wireless network temporary identifier RNTI includes a temporary cell The wireless network temporary identifier TC-RNTI or the cell wireless network temporary identifier C-RNTI.

As an optional implementation manner, after determining the resource configuration information of the dedicated search space for transmitting the small data of the terminal, the processor is specifically further configured to execute:

Send the at least one resource configuration information to the terminal through explicit signaling, where the explicit signaling includes broadcast signaling or dedicated signaling; or,

The at least one resource configuration information is sent to the terminal through a contention resolution message Msg4 or MsgB.

As an optional implementation manner, after determining the PDCCH resource for transmitting the small data, the processor is further configured to execute:

The downlink control information DCI of the small data is sent in the dedicated search space, wherein the cyclic redundancy check CRC of the DCI is obtained by scrambling the C-RNTI of the terminal.

After sending Msg2 or Msg4 or MsgB, start sending DCI, wherein the DCI is carried by the PDCCH resource; or,

After receiving Msg1 or Msg3 or MsgA, DCI starts to be sent, wherein the DCI is carried through the PDCCH resource.

After sending the RRC release signaling, stop sending DCI, wherein the DCI is carried by the PDCCH resource; or,

After sending the resource configuration information of the user-specific search space USS and/or the type-3 common search space CSS, stop sending the DCI, wherein the DCI is borne by the PDCCH resource.

As an optional implementation manner, before it is determined that the terminal enters the connected state for the first time, after determining the PDCCH resource for transmitting the small data, the processor is specifically further configured to execute:

It is determined that before entering the connected state next time, the terminal transmits the small data according to the PDCCH resource determined before entering the connected state for the first time.

As an optional implementation manner, after it is determined that the terminal enters the connected state this time and before entering the connected state next time, the processor is specifically further configured to execute:

The small data is transmitted according to the resource configuration information determined after the terminal enters the connected state this time; and/or,

Sending instruction signaling, where the instruction signaling is used to instruct the terminal to transmit the small data according to the resource configuration information determined after entering the connected state this time before the terminal enters the connected state next time.

In a fifth aspect, an embodiment of the present invention further provides a computer storage medium on which a computer program is stored, and when the program is executed by a processor, is used to implement the steps of the method described in the first aspect or the second aspect.

These and other aspects of the present application will be more clearly understood in the description of the following embodiments.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic diagram of a process of 4-step competitive random access provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of a process of 2-step contention random access provided by an embodiment of the present invention;

3 is an implementation flowchart of a resource allocation method for small data transmission provided by an embodiment of the present invention;

4A and 4B are schematic diagrams of a mapping relationship between an RO number and a resource configuration information number according to an embodiment of the present invention;

4C and 4D are schematic diagrams of a mapping relationship between an SSB index value and a resource configuration information number according to an embodiment of the present invention;

4E and 4F are schematic diagrams of a mapping relationship between an RO number and an SSB index value provided by an embodiment of the present invention;

FIG. 5A is a correspondence between resource configuration information of a dedicated search space and CORESET ID provided by an embodiment of the present invention;

FIG. 5B is a correspondence between resource configuration information and CORESET ID of a dedicated search space provided by an embodiment of the present invention;

6A is a schematic diagram of a resource mapping frequency domain location of a CCE of a PDCCH of a small data UE according to an embodiment of the present invention;

6B is a schematic diagram of a time domain position of a dedicated search space for a small data UE provided by an embodiment of the present invention;

7 is a flowchart of a resource allocation method for small data transmission provided by an embodiment of the present invention;

8 is a schematic diagram of a resource allocation system for small data transmission according to an embodiment of the present invention;

FIG. 9A is an implementation flowchart of a terminal and a base station determining resource configuration information of a dedicated search space according to a predefined manner according to an embodiment of the present invention;

FIG. 9B is an implementation flowchart of a terminal and a base station determining resource configuration information of a dedicated search space according to a predefined manner according to an embodiment of the present invention;

10A is a flowchart for implementing a terminal and a base station to determine resource configuration information of multiple dedicated search spaces according to a predefined manner according to an embodiment of the present invention;

10B is a flowchart for implementing a terminal and a base station to determine resource configuration information of multiple dedicated search spaces according to a predefined manner according to an embodiment of the present invention;

11A is an implementation flowchart of a base station sending resource configuration information of a dedicated search space to a terminal through SIB1 according to an embodiment of the present invention;

FIG. 11B is an implementation flowchart of a base station sending resource configuration information of a dedicated search space to a terminal through SIB1 according to an embodiment of the present invention;

FIG. 12A is a flowchart for implementing a base station sending resource configuration information of a dedicated search space to a terminal through RRC signaling according to an embodiment of the present invention;

FIG. 12B is a flowchart for implementing a base station sending resource configuration information of a dedicated search space to a terminal through RRC signaling according to an embodiment of the present invention;

13A is a flowchart for implementing a base station sending resource configuration information of multiple dedicated search spaces to a terminal through SIB1 according to an embodiment of the present invention;

13B is a flowchart for implementing a base station sending resource configuration information of multiple dedicated search spaces to a terminal through SIB1 according to an embodiment of the present invention;

FIG. 14A is a flowchart for implementing a base station sending resource configuration information of multiple dedicated search spaces to a terminal through RRC signaling according to an embodiment of the present invention;

14B is a flowchart for implementing a base station sending resource configuration information of multiple dedicated search spaces to a terminal through RRC signaling according to an embodiment of the present invention;

15A is a flowchart of an implementation of a base station sending indication information to a terminal through a contention resolution message according to an embodiment of the present invention;

FIG. 15B is a flowchart for implementing a base station sending indication information to a terminal through a contention resolution message according to an embodiment of the present invention;

FIG. 16A is a flowchart for implementing a base station sending indication information to a terminal through a contention resolution message according to an embodiment of the present invention;

FIG. 16B is a flowchart for implementing a base station sending indication information to a terminal through a contention resolution message according to an embodiment of the present invention;

17A is a flowchart of an implementation of predefining resource configuration information of a part of a dedicated search space and sending the resource configuration information of the remaining part of the dedicated search space to a terminal through SIB1 according to an embodiment of the present invention;

17B is a flowchart of an implementation of predefining resource configuration information of a part of a dedicated search space and sending the resource configuration information of the remaining part of the dedicated search space to a terminal through SIB1 according to an embodiment of the present invention;

18A is a flowchart of an implementation of predefining resource configuration information of a part of a dedicated search space and sending the resource configuration information of the remaining part of the dedicated search space to a terminal through RRC signaling according to an embodiment of the present invention;

18B is a flowchart of an implementation of predefining resource configuration information of a part of a dedicated search space and sending the resource configuration information of the remaining part of the dedicated search space to a terminal through RRC signaling according to an embodiment of the present invention;

19 is a schematic diagram of a resource allocation terminal for small data transmission according to an embodiment of the present invention;

20 is a schematic diagram of a network-side device for resource allocation for small data transmission according to an embodiment of the present invention;

21 is a schematic diagram of a resource allocation apparatus for small data transmission according to an embodiment of the present invention;

FIG. 22 is a schematic diagram of a resource allocation apparatus for small data transmission according to an embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. . Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The resource allocation method for small data transmission provided by the embodiment of the present invention can be applied to a terminal or a network side device.

The technical solutions provided in the embodiments of the present application can be applied to various systems, especially 5G systems. For example, the applicable system may be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) general packet Wireless service (general packet radio service, GPRS) system, 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 (LTE-A) system, universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) system, 5G New Radio (New Radio, NR) system, etc. These various systems include terminal equipment and network equipment. The system may also include a core network part, such as an evolved packet system (Evloved Packet System, EPS), a 5G system (5GS), and the like.

The terminal device involved in the embodiments of the present application may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem. In different systems, the name of the terminal device may be different. For example, in the 5G system, the terminal device may be called user equipment (User Equipment, UE). Wireless terminal equipment can communicate with one or more core networks (Core Network, CN) via a radio access network (Radio Access Network, RAN). "telephone) and computers with mobile terminal equipment, eg portable, pocket-sized, hand-held, computer-built or vehicle-mounted mobile devices, which exchange language and/or data with the radio access network. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (Personal Digital Assistants), PDA) and other devices. Wireless terminal equipment may also be referred to as system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point , a remote terminal device (remote terminal), an access terminal device (access terminal), a user terminal device (user terminal), a user agent (user agent), and a user device (user device), which are not limited in the embodiments of the present application.

The network side device involved in the embodiments of the present application may be a base station, and the base station may include a plurality of cells providing services for the terminal. Depending on the specific application, the base station may also be called an access point, or may be a device in the access network that communicates with wireless terminal equipment through one or more sectors on the air interface, or other names. The network-side equipment can be used to exchange received air frames with Internet Protocol (IP) packets, and act as a router between the wireless terminal equipment and the rest of the access network, where the rest of the access network can include Internet Protocol (IP) communication network. The network side equipment can also coordinate the attribute management of the air interface. For example, the network-side device involved in the embodiments of the present application may be a network-side device (Base Transceiver Station) in a Global System for Mobile Communications (GSM) or a Code Division Multiple Access (Code Division Multiple Access, CDMA). , BTS), it can also be a network side device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or it can be an evolution in a long term evolution (LTE) system type network side equipment (evolutional Node B, eNB or e-NodeB), 5G base station (gNB) in 5G network architecture (next generation system), or Home evolved Node B (HeNB), relay node (relay node), home base station (femto), pico base station (pico), etc., are not limited in the embodiments of this application. In some network structures, a network device may include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit may also be geographically separated.

One or more antennas can be used for multi-input multi-output (MIMO) transmission between the network-side device and the terminal device. The MIMO transmission can be single-user MIMO (Single User MIMO, SU-MIMO) or multi-user MIMO. MIMO (Multiple User MIMO, MU-MIMO). According to the form and number of root antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or diversity transmission, precoding transmission, or beamforming transmission.

In this embodiment of the present invention, the term "and/or" describes the association relationship between associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists alone, A and B exist simultaneously, and B exists alone these three situations. The character "/" generally indicates that the associated objects are an "or" relationship.

In the embodiments of the present application, the term "plurality" refers to two or more than two, and other quantifiers are similar.

The application scenarios described in the embodiments of the present invention are for the purpose of illustrating the technical solutions of the embodiments of the present invention more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of the present invention. It appears that the technical solutions provided by the embodiments of the present invention are also applicable to similar technical problems.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

Embodiment 1. The embodiment of the present invention is applied to the random access process. For Small data, the UE will continuously send uplink data in the initial random access phase (that is, the phase that does not enter the connected state), resulting in a long time occupation of Type1-PDCCH resources (common). search space), eventually there will be PDCCH resource scheduling blocking problems between normal UEs or small data UEs, and PDCCH resource scheduling blocking problems between broadcast information and unicast information.

First, the random access process involved in the embodiment of the present invention is briefly introduced below.

The random access of LTE and the conventional random access of NR are mainly divided into two types: contention random access and non-contention random access. The process of contention random access is shown in Figure 1, which is divided into four steps, also called 4 -step RACH process. Including the transmission of 4 messages, the messages transmitted in each step are as follows:

Msg1: The UE selects a random access preamble (random access preamble), and sends the selected random access preamble to the base station on the PRACH (Physical Random Access Channel) resource configured by SIB1.

Msg2: The base station receives the preamble and sends a random access response.

Msg3: The UE transmits Msg3 on the uplink PUSCH resource indicated by the UL grant carried in the RAR. Among them, different random access procedures correspond to different contents of Msg3 uplink transmission. For example, for the initial access UE, Msg3 sends the RRC connection establishment request and the UE identifier, while for the UE entering the connected state, the message sent in Msg3 is C-RNTI MAC CE. In a word, what Msg3 sends is the UE-specific identifier, which is used by the base station to uniquely determine the UE in the end.

Msg4: Also called a contention resolution message, the UE judges whether the random access is successful according to Msg4. For idle UEs or inactive UEs, Msg4 carries the CCCH MAC CE containing the RRC signaling content of Msg3; for connected UEs, Msg4 uses the PDCCH that uniquely identifies the C-RNTI in the UE cell for scheduling, and the PDCCH can achieve contention resolution. For an idle UE or an inactive UE, the temporary C-RNTI is converted into the unique UE identifier C-RNTI of the UE in the cell after the contention is successfully resolved.

As shown in Figure 2, in the new generation wireless network NR system, a two-step random access 2-step RACH process is extended on the basis of 4-step RACH for competitive random access, where MsgA is divided into preamble transmission on PRACH and data transmission on PUSCH, which are equivalent to Msg1 and Msg3 in the 4-step RACH process; msgB random access response and contention resolution are equivalent to Msg2 and Msg4 in the 4-step RACH process. In addition, because msgB contains UE contention resolution information, its size must be different from that of Msg2.

In the 2-step RACH process, the base station may send a random access response (or data message) to the UE, including but not limited to any or any of the following:

1) Random access is successful (success response);

2) Fallback to 4-step response (fallback response);

3) random access sequence number (random access ID response);

4) Data messages.

In order to solve the problem of scheduling congestion of PDCCH resources caused by the fact that Small data UE occupies Type1-PDCCH resources for a long time in the prior art, an embodiment of the present invention provides a resource allocation method for small data transmission, which is applied to a terminal, as shown in FIG. 3 . , the implementation steps of this method are as follows:

Step 300: Before entering the connection state, the terminal determines the resource configuration information of the dedicated search space for transmitting small data, wherein the small data is used to represent data whose data volume is less than a threshold;

The small data in this embodiment may be data that needs to be sent continuously, data that needs to be sent periodically, data that needs to be sent in stages, or data that needs to be sent at one time, which is not made in this embodiment. Too limited.

Step 301: The terminal determines the physical downlink control channel PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space.

It should be noted that the embodiments of the present invention are based on how to avoid the problem of PDCCH resource scheduling congestion when the terminal is in the random access process and does not enter the connected state. The resource configuration information can determine to transmit small data on the PDCCH resource of the dedicated search space.

As an optional implementation manner, the terminal determines, according to the resource configuration information of the dedicated search space, the PDCCH resource for transmitting the small data in any one or more of the following manners:

Mode 1. Determined by a predefined method.

The terminal determines the resource configuration information of the dedicated search space for transmitting small data according to the predefined resource configuration information of at least one dedicated search space.

In implementation, the terminal may predefine resource configuration information of a dedicated search space, and determine the PDCCH resource for the terminal to transmit small data from the resource configuration information; or,

The terminal may pre-define resource configuration information of multiple dedicated search spaces, determine one resource configuration information from the resource configuration information of the multiple dedicated search spaces, and then determine, from the one resource configuration information, whether the terminal transmits small data. PDCCH resource. Wherein, each resource configuration information in the plurality of resource configuration information corresponds to a unique resource configuration information number.

Optionally, in this embodiment of the present invention, one resource configuration information is determined from the resource configuration information of multiple dedicated search spaces by the following method:

Method 11. According to the mapping relationship between the RO (random access opportunity, RACH (Random Access Channel) Occasion,) number selected by the terminal for sending the random access preamble preamble and the number of the resource configuration information, from the multiple resources Resource configuration information corresponding to the RO number is determined in the configuration information.

It should be noted that the RO number in the embodiment of the present invention is a valid RO number, where the valid RO number may be specified by the 5G NR protocol, or may be based on multiple resource configuration information in the embodiment of the present invention number is determined.

In implementation, the resource configuration information number is determined according to the RO number by the following formula:

n _{sd-SS configuration} = mod(RO _index /N);

Wherein, n _{sd-SS configuration} represents the resource configuration information number; RO _index represents the RO number, and N represents the number of resource configuration information in the dedicated search space.

Optionally, the mapping relationship between the RO number and the resource configuration information number may be predefined, or may be determined by the mapping relationship between the RO number and the resource configuration information number carried in the received display signaling. This embodiment of the present invention does not limit too much. Wherein, the display signaling includes broadcast signaling (such as SIB1 message) and dedicated signaling (such as RRC release signaling).

FIG. 4A and FIG. 4B are a mapping relationship between an RO number and a resource configuration information number according to an embodiment of the present invention. Wherein PDCCH Config.Index#n represents the resource configuration information number in this embodiment, and n is an integer greater than or equal to zero.

Method 12: The terminal determines from the plurality of resource configuration information corresponding to the SSB index value according to the mapping relationship between the received SSB (synchronization signal and physical broadcast channel PBCH block) index value and the number of the resource configuration information resource configuration information.

In implementation, the resource configuration information number is determined according to the SSB index value by the following formula:

n _{sd-SS configuration} = mod(SSB _index /N);

Wherein, the n _{sd-SS configuration} represents the resource configuration information number; the SSB _index represents the SSB index value; and N represents the number of resource configuration information of the dedicated search space.

In implementation, the SSB index value may be determined according to the RSRP (Reference Signal Receiving Power, reference signal received power) of the measured SSB.

Optionally, the mapping relationship between the SSB index value and the resource configuration information number may be predefined, or may be determined by the mapping relationship between the SSB index value and the resource configuration information number carried in the received display signaling. , this embodiment of the present invention does not limit too much. Wherein, the display signaling includes broadcast signaling (such as SIB1 message) and dedicated signaling (such as RRC release signaling).

4C and 4D are a mapping relationship between an SSB index value and a resource configuration information number provided by an embodiment of the present invention, where PDCCH Config.Index#n represents the resource configuration information number in this embodiment, and n is greater than or equal to zero. Integer.

FIG. 4E and FIG. 4F further provide a mapping relationship between an RO number and an SSB index value according to an embodiment of the present invention.

Method 13: The terminal determines resource configuration information corresponding to the indication information from the plurality of resource configuration information according to the indication information carried in the received contention resolution message Msg4 or MsgB.

In the implementation, the terminal determines one resource configuration information corresponding to the indication information according to the indication information from the resource configuration information of a plurality of pre-defined dedicated search spaces.

Mode 2: Determine by displaying signaling.

The terminal determines the resource configuration information of the dedicated search space for transmitting small data according to the received display signaling that carries the resource configuration information of at least one dedicated search space, where the display signaling includes broadcast signaling or dedicated signaling;

Optionally, the broadcast signaling may be SIB1 (System Information Block, system information block) signaling, and the dedicated signaling includes but is not limited to RRC signaling, such as RRC release signaling.

In implementation, the terminal may determine, according to the received resource configuration information of a dedicated search space, the PDCCH resource for the terminal to transmit small data from the one resource configuration information; or,

The terminal may determine one resource configuration information from the resource configuration information of the multiple dedicated search spaces according to the received resource configuration information of the multiple dedicated search spaces, and then determine from the one resource configuration information that the terminal transmits small data. the PDCCH resource. Wherein, each resource configuration information in the plurality of resource configuration information corresponds to a unique resource configuration information number.

Optionally, in this embodiment of the present invention, to determine one resource configuration information from the resource configuration information of multiple dedicated search spaces, reference may be made to the method in the foregoing method 1, and details are not repeated here.

Mode 3: Determine by means of pre-defining and displaying signaling.

The terminal determines, according to the first part of the resource configuration information of the predefined at least one dedicated search space, the first part of the resource configuration information of the dedicated search space for transmitting small data;

The terminal determines the second part of the resource configuration information of the dedicated search space for transmitting small data according to the received display signaling that carries the second part of the resource configuration information of the at least one dedicated search space, where the display signaling includes broadcast signaling or dedicated signaling;

The resource configuration information includes: the first part of resource configuration information and the second part of resource configuration information.

Optionally, in this embodiment of the present invention, to determine a piece of resource configuration information from resource configuration information of multiple dedicated search spaces, reference may be made to the multiple methods in the foregoing method 1, and details are not described herein again.

As an optional implementation method, the resource configuration information in this embodiment includes any one or more of the following; if the resource configuration information is multiple, each resource configuration information includes any one or more of the following :

1) AL (aggregation level, aggregation level) of the dedicated search space;

Among them, AL is understood as the CCE (Control Channel Element, control channel element) aggregation level of PDCCH;

2) the number of PDCCH candidates corresponding to each AL of the dedicated search space;

3) blind detection period parameters of the dedicated search space;

The implementation includes a dedicated search space to indicate the time slot period and offset (unit is slot) of the received PDCCH, and the starting position and number of OFDM symbols in the occupied slot (symbolswithinslot, bitmap mode), wherein the blind detection period parameter can be It is determined that the terminal needs to monitor the time domain position of the dedicated search space.

Optionally, the blind detection period parameters include but are not limited to: the slot period, the offset offset in the time slot, the starting position of the OFDM symbol in the occupied slot, and the number of occupied OFDMs (symbolswithinslot, which indicates the number of occupied OFDMs in a bitmap manner. ), symbolswithinslot), the duration of the slot duration.

In implementation, the time domain position of the PDCCH resource for transmitting the small data can be determined according to the resource configuration information of the dedicated search space by the following formula:

where n _f is the frame number of the dedicated search space;

is the number of slots contained in a frame;

n _slot is the time slot number in the frame sequence number n _f that the dedicated search space starts;

offset is the starting position sequence number of the OFDM symbol in the occupied slot in the RRC configuration blind detection period parameter;

P _slot is the period in the RRC configuration blind detection period parameter.

4) CORESET (control-resource set, control resource set) corresponding to the dedicated search space;

The CORESET can be understood as a set of physical resources and is composed of multiple RBs in the frequency domain and 1 or 2 or 3 OFDM symbols in the time domain.

Optionally, the CORESET corresponding to the dedicated search space may be determined by the CORESET ID, for example, CORESET#0, or other CORESET IDs of the broadcast DCI received by the terminal.

As an optional implementation manner, the terminal determines the PDCCH resource for transmitting the small data from the resource configuration information of the dedicated search space through the following steps:

Step 1. The terminal determines the CORESET corresponding to the dedicated search space according to the resource configuration information;

Optionally, the terminal may determine the CORESET corresponding to the resource configuration information of the dedicated search space according to the CORESET ID associated with the dedicated search space.

Optionally, the CORESET ID may be the same CORESET ID used by the type1 PDCCH. As shown in FIG. 5A , the CORESET where the PDCCH resource for transmitting small data in the embodiment of the present invention is located is the same as the CORESET where the type1 PDCCH is located, Both are CORESET#0; the PDCCH resource for transmitting small data is represented by New PDCCH for SDT (small data transmission, small data transmission) SS (search space, search space); or,

The CORESET ID is different from the CORESET ID used by the type1 PDCCH. As shown in FIG. 5B , the PDCCH resource for transmitting small data in the embodiment of the present invention corresponds to CORESET#N, and the type1 PDCCH corresponds to CORESET#0, where the N is an integer greater than zero. The PDCCH resource for transmitting small data is represented by New PDCCH for SDT (small data transmission) SS (search space).

It should be noted that, regardless of whether the CORESET where the PDCCH resource for transmitting small data is located in the embodiment of the present invention is the same as the CORESET where the type1 PDCCH is located, it can be guaranteed that the type1 PDCCH is not occupied to send small data for a long time, thereby reducing the need for small data UEs and ordinary UEs. PDCCH scheduling blocking probability between.

Step 2, in the CORESET, the terminal determines the PDCCH resource according to the wireless network temporary identifier RNTI of the terminal, the AL of the dedicated search space, and the number of PDCCH candidates corresponding to the AL;

In implementation, the terminal uses the RNTI as the randomization parameter of the hash function, and determines the number of PDCCH candidates for transmitting the small data in the search space according to the AL and the number of PDCCH candidates corresponding to the AL based on the hash function. PDCCH resource. The RNTI includes a temporary cell radio network temporary identifier TC-RNTI or a cell radio network temporary identifier C-RNTI. It is easy to understand that the terminal uses the RNTI as the randomization parameter of the hash function, determines the resource mapping frequency domain position of the PDCCH candidate corresponding to the RNTI according to the hash function, and then blindly checks the period parameter according to the CORESET information in the resource configuration information. And the number of PDCCH candidates under each AL, and finally determine the PDCCH resource location scheduled by small data.

As shown in FIG. 6A , because the RNTIs of the small data UEs in this embodiment are different, the resource mapping frequency domain positions of the CCEs of the PDCCH of each small data UE are also different. In this way, the frequency domain resources occupied between small data UEs will be different, thereby reducing the scheduling blocking probability of PDCCH resources between small data UEs.

As shown in FIG. 6B , since the time domain position of the dedicated search space of the small data UE in this embodiment is different from the time domain position of the public search space of Type1-PDCCH, the resources of the dedicated search space of the small data UE can be compared with those of the common search space of the small data UE. The resources of the common search space of the UE are distinguished, thereby reducing the PDCCH scheduling blocking probability between the small data UE and the ordinary UE.

It should be noted that the terminal will obtain the RNTI before completing the random access and receiving the USS and/or type3-CSS configuration signaling or RRC release message, because the RNTI is unique to the terminal, that is, the RNTI of each terminal is not the same, then when the terminal uses RNTI to determine the PDCCH resources in the dedicated search space, it must be guaranteed that the PDCCH resources determined by different terminals for transmitting small data are different, which can avoid the PDCCH resources in the same dedicated search space. The problem of scheduling blocking.

The embodiment of the present invention provides a kind of AL and the comparison table of the number of PDCCH candidates corresponding to the AL, as follows:

ALAL	PDCCH candidate个数Number of PDCCH candidates
44	44
88	22
1616	11

Among them, according to the corresponding relationship shown in the above table, the number of PDCCH candidates with PDCCH resource AL of 4 can be configured to be 4; the number of PDCCH candidates with PDCCH resource AL of 8 is 2; the number of PDCCH candidates with PDCCH resource AL of 16 can be configured as 1.

As an optional implementation manner, after the terminal determines the PDCCH resources for transmitting the small data according to the resource configuration information of the dedicated search space, the terminal may also use the resources of the dedicated search space to receive DCI, as follows:

As an optional implementation manner, in the embodiment of the present invention, after determining the PDCCH resource for transmitting the small data, the terminal determines the effective point of the PDCCH resource in the following manner:

1) The effective point of the PDCCH resource is that after the terminal receives Msg2 or Msg4 or MsgB:

After receiving Msg2 or Msg4 or MsgB, the terminal starts to monitor the PDCCH resource; or,

2) The effective point of the PDCCH resource is before the terminal sends Msg1 or Msg3 or MsgA:

The terminal starts to monitor the PDCCH resource before sending Msg1, Msg3 or MsgA.

As an optional implementation manner, in this embodiment of the present invention, after determining the PDCCH resource for transmitting the small data, the terminal determines the end point of the PDCCH resource in the following manner:

3) The end point of the PDCCH resource is after the terminal receives the RRC release signaling:

After receiving the radio resource control RRC release signaling, the terminal stops monitoring the PDCCH resource;

It is easy to understand that when the small data terminal is in a disconnected state in order to save power after sending or receiving small data, the base station will send RRC release signaling to let the UE return to the inactive inactive/idle state, and the UE is in the idle/inactive state. It is not necessary to use the PDCCH resources, so it is necessary to stop monitoring the PDCCH resources after receiving the RRC release signaling to save the power of the terminal.

4) The end point of the PDCCH resource is that after the terminal receives the resource configuration information of the USS and/or type3 CSS:

As an optional implementation manner, after the terminal according to the embodiment of the present invention determines the PDCCH resource for transmitting the small data before entering the connected state for the first time, the method further includes:

Optionally, before the terminal enters the connected state for the first time, the PDCCH resource for transmitting small data once is determined by the method provided in this embodiment above. The detailed process will not be repeated here. In the agreed manner, the small data is transmitted using the PDCCH resource determined before entering the connected state for the first time.

Optionally, the terminal may also transmit small data according to the signaling sent by the receiving base station and according to the indication information of the PDCCH resource determined before entering the connected state for the first time carried in the signaling. That is, the terminal only needs to determine the PDCCH resource for transmitting the small data once, and then the terminal can transmit the small data according to the PDCCH resource determined before entering the connected state last time.

As an optional implementation manner, the embodiment of the present invention also provides a method for determining PDCCH resources for transmitting small data, and the specific method is as follows:

After the terminal enters the connected state this time and before entering the connected state next time, the terminal further determines the PDCCH resource in any of the following ways:

Mode 1: The terminal transmits the small data according to the resource configuration information determined after entering the connected state this time;

In implementation, the terminal determines a PDCCH resource for transmitting small data according to the resource configuration information determined after entering the connected state this time, and transmits the small data through the PDCCH resource.

Optionally, the resource configuration information determined after the terminal enters the connected state this time includes but is not limited to:

Resource configuration information of USS, and/or resource configuration information of type3 CSS.

In implementation, after the terminal enters the connected state this time and before entering the connected state next time, the small data may be transmitted through the resource configuration information of the USS in a pre-agreed manner; or, the small data may be transmitted through the resource configuration information of the type3 CSS. small data.

Manner 2: The terminal transmits the small data according to the received indication signaling, wherein the indication signaling is used to instruct the terminal to transmit the small data according to the resource configuration information determined after entering the connected state this time.

Optionally, the resource configuration information includes but is not limited to: resource configuration information of USS, and/or resource configuration information of type3 CSS.

Optionally, the indication signaling is used to instruct the terminal to transmit the small data according to the resource configuration information of the USS determined after entering the connected state this time; or, the indication signaling is used to instruct the terminal The small data is transmitted according to the resource configuration information of the type3 CSS determined after entering the connection state this time.

Optionally, the indication signaling may use a 1-bit designated bit to instruct the terminal to transmit the small data according to the resource configuration information of the USS or the resource configuration information of the type3 CSS determined after entering the connected state this time. For example, the indication signaling indicates that the terminal transmits the small data according to the resource configuration information of the USS determined after entering the connected state by specifying the bit value 0 of the bit, and indicating the bit value 1 of the specified bit. The terminal transmits the small data according to the resource configuration information of the type3 CSS determined after entering the connection state this time.

In this embodiment of the present invention, it may also be determined whether the terminal enters the connected state by receiving the resource configuration information of the USS and/or type3 CSS by the terminal. That is, if the terminal receives the resource configuration information of the USS and/or type3 CSS, it is determined to enter the connected state.

Embodiment 2. In order to solve the problem of scheduling congestion of PDCCH resources caused by Small data UE occupying Type1-PDCCH resources for a long time in the prior art, based on the same inventive concept, the embodiment of the present invention provides a resource allocation method for small data transmission, Applied to the base station, as shown in Figure 7, the implementation steps of the method are as follows:

Step 700: Before determining that the terminal enters the connected state, the base station determines the resource configuration information of the dedicated search space for transmitting the small data of the terminal, wherein the small data is used to represent data whose data amount is less than a threshold;

Step 701: The base station determines the PDCCH resource of the physical downlink control channel for transmitting the small data according to the resource configuration information of the dedicated search space.

This embodiment of the present invention transmits small data through PDCCH resources in the dedicated search space. The dedicated search space in this embodiment is different from the public search space, that is, the small data terminal in the embodiment of the present invention does not need to occupy the public space when continuously sending data. The PDCCH resources in the search space can avoid the scheduling blocking problem of PDCCH resources between UEs and the scheduling blocking problem of PDCCH resources between broadcast information and on-demand information to a certain extent. The core of the embodiment of the present invention is that the base station transmits small data through a PDCCH resource of a dedicated search space different from the common search space.

As an optional implementation manner, the base station determines resource configuration information of a dedicated search space for transmitting small data of the terminal according to resource configuration information of at least one predefined dedicated search space.

The at least one resource configuration information is sent to the terminal through explicit signaling, and the explicit signaling includes broadcast signaling or dedicated signaling; wherein, the broadcast signaling may be an SIB1 message, and the dedicated signaling may is RRC release signaling; or,

As an optional implementation manner, there are multiple resource configuration information of the dedicated search space predefined by the base station, and each resource configuration information corresponds to a unique resource configuration information number;

The base station determines, from the resource configuration information of multiple dedicated search spaces, the resource configuration information of the dedicated search space for transmitting the small data of the terminal in any of the following ways:

Manner 1: The base station determines the resource configuration information corresponding to the RO number from the plurality of resource configuration information according to the mapping relationship between the received random access opportunity RO number and the resource configuration information number;

n _{sd-SS configuration} = mod(RO _index /N);

Optionally, the mapping relationship between the RO number and the resource configuration information number may be predefined. The base station may send the mapping relationship to the terminal through explicit signaling, where the explicit signaling includes broadcast signaling (eg, SIB1 message) and dedicated signaling (eg, RRC release signaling).

Mode 2: The base station determines the resource configuration information corresponding to the SSB index value from the plurality of resource configuration information according to the mapping relationship between the synchronization signal and the physical broadcast channel block SSB index value and the resource configuration information number;

n _{sd-SS configuration} = mod(SSB _index /N);

Optionally, the mapping relationship between the SSB index value and the resource configuration information number may be predefined. The base station may send the mapping relationship to the terminal through explicit signaling, where the explicit signaling includes broadcast signaling (eg, SIB1 message) and dedicated signaling (eg, RRC release signaling).

Manner 3: The base station itself determines resource configuration information from the plurality of resource configuration information.

Optionally, the base station may send the determined resource configuration information to the terminal through a contention resolution message Msg4 or MsgB.

the aggregation level AL of the dedicated search space;

blind detection period parameters of the dedicated search space;

The control resource set CORESET corresponding to the dedicated search space.

As an optional implementation manner, the base station determines the PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space through the following steps:

Step 1. The base station determines the CORESET corresponding to the dedicated search space according to the resource configuration information;

Optionally, the base station may determine the CORESET corresponding to the resource configuration information of the dedicated search space according to the CORESET ID associated with the dedicated search space.

Optionally, the CORESET ID may be the same CORESET ID used by the type1 PDCCH, that is, the CORESET where the PDCCH resource for transmitting small data in the embodiment of the present invention is located is the same as the CORESET where the type1 PDCCH is located; or, the CORESET The ID is different from the CORESET ID used by the type1 PDCCH, that is, the CORESET where the PDCCH resource for transmitting small data in the embodiment of the present invention is located is different from the CORESET where the type1 PDCCH is located.

Step 2, in the CORESET, the base station determines the PDCCH resource according to the determined RNTI of the terminal, the AL of the dedicated search space, and the number of PDCCH candidates corresponding to the AL;

In implementation, the base station uses the RNTI as the randomization parameter of the hash function, and determines the number of PDCCH candidates for transmitting the small data in the search space based on the hash function according to the AL and the number of PDCCH candidates corresponding to the AL. PDCCH resource.

The RNTI includes TC-RNTI or C-RNTI.

It should be noted that the base station determines that the terminal will allocate a unique RNTI to the terminal after completing random access. Since the RNTI is unique to the terminal, that is, the RNTI of each terminal is different, when the RNTI is used to Scheduling the PDCCH resources in the dedicated search space must ensure that the PDCCH resources for scheduling small data of different terminals are different, and can avoid the problem of scheduling congestion of the PDCCH resources in the same dedicated search space.

The base station sends the DCI of the small data in the dedicated search space, wherein the CRC of the DCI is obtained by scrambling the C-RNTI of the terminal.

As an optional implementation manner, in the embodiment of the present invention, after determining the PDCCH resource for transmitting the small data, the base station determines the effective point of the PDCCH resource in any of the following ways:

1) The effective point of the PDCCH resource is after the base station sends Msg2 or Msg4 or MsgB:

That is, after sending Msg2 or Msg4 or MsgB, the base station starts to send downlink control information (Downlink control information, DCI), wherein the DCI is carried by the PDCCH resource;

It can be understood that DCI is started to be sent on the PDCCH resource for scheduling the transmission of small data.

2) The effective point of the PDCCH resource is after the base station receives Msg1 or Msg3 or MsgA:

That is, after receiving Msg1, Msg3 or MsgA, the base station starts to send DCI, wherein the DCI is carried by the PDCCH resource.

As an optional implementation manner, after the base station determines the PDCCH resource for transmitting the small data, the base station determines the end point of the PDCCH resource in the following manner:

3) The end point of the PDCCH resource is after the base station sends the RRC release signaling:

The base station stops sending DCI after sending the radio resource control RRC release signaling, wherein the DCI is carried by the PDCCH resource;

4) The end point of the PDCCH resource is after the base station sends the resource configuration information of USS and/or type3 CSS:

After sending the resource configuration information of the user-specific search space USS and/or the type-3 common search space CSS, the base station stops sending DCI, wherein the DCI is carried by the PDCCH resource.

Before the base station determines that the terminal enters the connected state for the first time, after determining the PDCCH resource for transmitting the small data, the base station further includes:

It should be noted that, before the base station determines that the terminal enters the connected state for the first time, the PDCCH resource for transmitting small data is determined by the method provided in the above-mentioned embodiment, which is not repeated here. method, it is determined that the terminal transmits the small data according to the PDCCH resource initially determined by the base station before entering the connected state for the first time and before entering the connected state for the next time.

Optionally, after the base station determines that the terminal enters the connected state for the first time, it determines the PDCCH resource for transmitting small data by using the method provided in the above-mentioned embodiment, which is not repeated here. Indication signaling, instructing the terminal to transmit the small data according to the PDCCH resource initially determined by the terminal before entering the connected state for the first time and before entering the connected state for the next time.

As an optional implementation manner, after determining that the terminal enters the connected state this time and before entering the connected state next time, the base station further includes any one or any of the following implementation manners:

Mode 1: the base station transmits the small data according to the resource configuration information determined after the terminal enters the connected state this time;

In implementation, the base station may transmit the small data through the resource configuration information of the USS in a pre-agreed manner; or, transmit the small data through the resource configuration information of the type3 CSS.

Manner 2: The base station sends an indication signaling, where the indication signaling is used to instruct the terminal to transmit the small data according to the resource configuration information determined after entering the connected state this time before entering the connected state next time.

In implementation, the base station may determine by itself to use the resource configuration information of the USS, or the resource configuration information of the type3 CSS to transmit the small data, and send the resource configuration information determined by itself to the terminal by means of indication signaling.

Optionally, the indication signaling may use a 1-bit designated bit to instruct the terminal to transmit the small data according to the resource configuration information of the USS or the resource configuration information of the type3 CSS determined after entering the connected state this time.

Embodiment 3. The embodiment of the present invention provides a resource allocation method for small data transmission, which can be applied to a system. The system includes a terminal and a network side device. The following describes the implementation steps of the system:

As shown in Figure 8, the system includes a terminal 800 and a network side device 801, wherein:

The terminal 800 is configured to, before entering a connected state, determine resource configuration information of a dedicated search space for transmitting small data, and determine a physical downlink control channel PDCCH resource for transmitting the small data;

The network side device 801 is configured to, before determining that the terminal enters the connected state, determine the resource configuration information of the dedicated search space for transmitting the small data of the terminal, and determine to transmit the small data according to the resource configuration information of the dedicated search space. Data physical downlink control channel PDCCH resources.

The small data is used to characterize data whose data amount is less than a threshold.

As shown in FIG. 9A and FIG. 9B , taking the network side device as a base station as an example, this embodiment provides a method for a terminal and a base station to determine the resource configuration information of a dedicated search space according to a predefined method. The specific implementation steps are as follows:

Step 900: Before the terminal enters the connected state, the terminal and the base station determine the resource configuration information of the dedicated search space for transmitting small data according to the resource configuration information of a predefined dedicated search space;

The resource configuration information includes: a control resource set CORESET (optional CORESET ID) corresponding to the dedicated search space; ALs of the dedicated search space; PDCCH candidates corresponding to each AL of the dedicated search space number; the blind detection period parameter of the dedicated search space.

Step 901, the terminal and the base station determine the CORESET corresponding to the dedicated search space according to the resource configuration information;

Step 902, in the CORESET, the terminal and the base station use the RNTI of the terminal as the randomization parameter of the hash function, based on the hash function according to the AL of the dedicated search space and the number of PDCCH candidates corresponding to the AL, determining the PDCCH resource for transmitting the small data in the search space;

Step 903a, after the terminal receives msg4 and before receiving the configuration signaling of USS or type3 PDCCH, the terminal starts to monitor the PDCCH resource, and the base station starts to send DCI, wherein the DCI is carried by the PDCCH resource; or,

Step 903b, after the terminal receives msgB and before receiving the configuration signaling of USS or type3 PDCCH, the terminal starts to monitor the PDCCH resource, and the base station starts to send DCI, wherein the DCI is carried by the PDCCH resource;

In implementation, the terminal sends small data through UL data and receives small data through DL data; the base station receives small data through UL data and sends small data through DL data.

Step 904, after the terminal receives the resource configuration information of the USS or type3 CSS sent by the base station, the terminal stops monitoring the PDCCH resource, and the base station stops sending DCI, wherein the DCI is carried by the PDCCH resource;

or,

After the terminal receives the RRC release signaling sent by the base station, the terminal stops monitoring the PDCCH resource, and the base station stops sending DCI, where the DCI is carried by the PDCCH resource.

As shown in FIG. 10A and FIG. 10B , taking the network side device as a base station as an example, this embodiment provides a method for a terminal and a base station to determine the resource configuration information of multiple dedicated search spaces according to a predefined method. The specific implementation steps are as follows:

Step 1000: Before the terminal enters the connected state, the terminal and the base station determine the resource configuration information of a dedicated search space for transmitting small data according to the resource configuration information of multiple predefined dedicated search spaces;

In the implementation, the terminal and the base station determine the resource configuration information corresponding to the RO number from the multiple resource configuration information according to the mapping relationship between the RO number selected by sending the preamble and the resource configuration information number; or,

The terminal and the base station determine the resource configuration information corresponding to the SSB index value from the plurality of resource configuration information according to the mapping relationship between the received SSB index value and the number of the resource configuration information; or,

The terminal determines, according to the indication information carried in the Msg4 or MsgB sent by the receiving base station, resource configuration information corresponding to the indication information from the plurality of resource configuration information.

Step 1001, the terminal and the base station determine the CORESET corresponding to the dedicated search space according to the resource configuration information;

Step 1002, in the CORESET, the terminal and the base station use the RNTI of the terminal as the randomization parameter of the hash function, based on the hash function according to the AL of the dedicated search space and the number of PDCCH candidates corresponding to the AL, determining the PDCCH resource for transmitting the small data in the search space;

Step 1003a, after the terminal receives msg4 and before receiving the configuration signaling of USS or type3 PDCCH, the terminal starts to monitor the PDCCH resource, and the base station starts to send DCI, wherein the DCI is carried by the PDCCH resource; or,

Step 1003b, after the terminal receives msgB and before receiving the configuration signaling of USS or type3 PDCCH, the terminal starts to monitor the PDCCH resource, and starts to send DCI, wherein the DCI is carried by the PDCCH resource;

Step 1004, after the terminal receives the resource configuration information of the USS or type3 CSS sent by the base station, the terminal stops monitoring the PDCCH resource, and the base station stops sending DCI, wherein the DCI is carried by the PDCCH resource;

or,

As shown in FIG. 11A and FIG. 11B , taking the network side device as a base station as an example, this embodiment provides a method in which the terminal determines the resource configuration information of the dedicated search space according to the display signaling, and the base station uses the SIB1 to determine the resources of a dedicated search space. The configuration information is sent to the terminal, and the specific implementation steps are as follows:

Step 1100: Before the terminal enters the connected state, the base station broadcasts resource configuration information of a dedicated search space to the terminal through SIB1;

Step 1101, the terminal determines the resource configuration information of the dedicated search space for transmitting small data according to the received SIB1 broadcast signaling that carries the resource configuration information of a dedicated search space;

Step 1102, the terminal and the base station determine the CORESET corresponding to the dedicated search space according to the resource configuration information;

Step 1103, the terminal and the base station use the RNTI of the terminal as the randomization parameter of the hash function in the CORESET, based on the hash function according to the AL of the dedicated search space and the number of PDCCH candidates corresponding to the AL, determining the PDCCH resource for transmitting the small data in the search space;

Step 1104a: After the terminal receives msg4 and before receiving the configuration signaling of USS or type3 PDCCH, the terminal starts to monitor the PDCCH resource, and the base station starts to send DCI, where the DCI is carried by the PDCCH resource; or,

Step 1104b, after the terminal receives msgB and before receiving the configuration signaling of USS or type3 PDCCH, the terminal starts to monitor the PDCCH resource, and the base station starts to send DCI, wherein the DCI is carried by the PDCCH resource;

Step 1105, after the terminal receives the resource configuration information of the USS or type3 CSS sent by the base station, the terminal stops monitoring the PDCCH resource, and the base station stops sending DCI, wherein the DCI is carried by the PDCCH resource;

or,

As shown in FIG. 12A and FIG. 12B , taking the network side device as a base station as an example, this embodiment provides a method in which the terminal determines the resource configuration information of the dedicated search space by displaying signaling, and the base station assigns a dedicated search space to a dedicated search space through RRC signaling. The resource configuration information is sent to the terminal, and the specific implementation steps are as follows:

Step 1200: Before the terminal enters the connected state, the base station sends the resource configuration information of a dedicated search space to the terminal through RRC signaling;

Step 1201, the terminal determines the resource configuration information of the dedicated search space for transmitting small data according to the received RRC signaling that carries the resource configuration information of a dedicated search space;

Step 1202, the terminal and the base station determine the CORESET corresponding to the dedicated search space according to the resource configuration information;

Step 1203, the terminal and the base station use the RNTI of the terminal as the randomization parameter of the hash function in the CORESET, based on the hash function according to the AL of the dedicated search space and the number of PDCCH candidates corresponding to the AL, determining the PDCCH resource for transmitting the small data in the search space;

Step 1204a: After the terminal receives msg4 and before receiving the configuration signaling of USS or type3 PDCCH, the terminal starts to monitor the PDCCH resource, and the base station starts to send DCI, where the DCI is carried by the PDCCH resource; or,

Step 1204b, after the terminal receives msgB and before receiving the configuration signaling of USS or type3 PDCCH, the terminal starts to monitor the PDCCH resource, and the base station starts to send DCI, wherein the DCI is carried by the PDCCH resource;

Step 1205: After the terminal receives the resource configuration information of the USS or type3 CSS sent by the base station, the terminal stops monitoring the PDCCH resource, and the base station stops sending DCI, wherein the DCI is carried by the PDCCH resource.

As shown in FIG. 13A and FIG. 13B , taking the network side device as a base station as an example, this embodiment provides a method in which the terminal determines the resource configuration information of the dedicated search space according to the display signaling, and the base station uses the SIB1 to determine the resource configuration information of the multiple dedicated search spaces. The resource configuration information is sent to the terminal, and the specific implementation steps are as follows:

Step 1300: Before the terminal enters the connected state, the base station broadcasts the resource configuration information of multiple dedicated search spaces to the terminal through SIB1;

Step 1301: The terminal determines the resource configuration information of a dedicated search space for transmitting small data from the received SIB1 broadcast signaling that carries the resource configuration information of multiple dedicated search spaces;

In the implementation, the terminal and the base station determine the resource configuration information corresponding to the RO number from the multiple resource configuration information according to the mapping relationship between the RO number selected by the sending preamble and the resource configuration information number; or,

Step 1302, the terminal and the base station determine the CORESET corresponding to the dedicated search space according to the resource configuration information of the dedicated search space;

Step 1303, the terminal and the base station use the RNTI of the terminal as the randomization parameter of the hash function in the CORESET, based on the hash function according to the AL of the dedicated search space and the number of PDCCH candidates corresponding to the AL, determining the PDCCH resource for transmitting the small data in the search space;

Step 1304a: After the terminal receives msg4 and before receiving the configuration signaling of USS or type3 PDCCH, the terminal starts to monitor the PDCCH resource, and the base station starts to send DCI, where the DCI is carried by the PDCCH resource; or,

Step 1304b, after the terminal receives msgB and before receiving the configuration signaling of USS or type3 PDCCH, the terminal starts to monitor the PDCCH resource, and the base station starts to send DCI, wherein the DCI is carried by the PDCCH resource;

Step 1305, after the terminal receives the resource configuration information of the USS or type3 CSS sent by the base station, the terminal stops monitoring the PDCCH resource, and the base station stops sending DCI, wherein the DCI is carried by the PDCCH resource;

or,

As shown in FIG. 14A and FIG. 14B , taking the network-side device as a base station as an example, this embodiment provides a method in which the terminal determines the resource configuration information of the dedicated search space by displaying signaling, and the base station uses RRC signaling to determine the resource configuration information of multiple dedicated search spaces. The resource configuration information of the space is sent to the terminal, and the specific implementation steps are as follows:

Step 1400: Before the terminal enters the connected state, the base station sends the resource configuration information of multiple dedicated search spaces to the terminal through RRC signaling;

Step 1401: The terminal determines the resource configuration information of a dedicated search space for transmitting small data from the received RRC signaling that carries the resource configuration information of multiple dedicated search spaces;

Step 1402, the terminal and the base station determine the CORESET corresponding to the dedicated search space according to the resource configuration information of the dedicated search space;

Step 1403, the terminal and the base station use the RNTI of the terminal as the randomization parameter of the hash function in the CORESET, and the number of PDCCH candidates corresponding to the AL of the dedicated search space and the AL based on the hash function, determining the PDCCH resource for transmitting the small data in the search space;

Step 1404a: After the terminal receives msg4 and before receiving the configuration signaling of USS or type3 PDCCH, the terminal starts to monitor the PDCCH resource, and the base station starts to send DCI, wherein the DCI is carried by the PDCCH resource; or,

Step 1404b, after the terminal receives msgB and before receiving the configuration signaling of USS or type3 PDCCH, the terminal starts to monitor the PDCCH resource, and the base station starts to send DCI, wherein the DCI is carried by the PDCCH resource;

Step 1405, after the terminal receives the resource configuration information of the USS or type3 CSS sent by the base station, the terminal stops monitoring the PDCCH resource, and the base station stops sending DCI, wherein the DCI is carried by the PDCCH resource.

As shown in FIG. 15A and FIG. 15B , taking the network side device as a base station as an example, this embodiment provides a method in which the terminal determines the resource configuration information of the dedicated search space according to the display signaling, and the base station uses the SIB1 to determine the resource configuration information of the multiple dedicated search spaces. The resource configuration information is sent to the terminal, and the base station sends the indication information to the terminal through a contention resolution message. The specific implementation steps are as follows:

Step 1500: Before the terminal enters the connected state, the base station broadcasts the resource configuration information of multiple dedicated search spaces to the terminal through SIB1;

Step 1501a, the base station sends indication information to the terminal through Msg4, where the indication information carries one resource configuration information in the resource configuration information of the multiple dedicated search spaces;

Step 1501b, the base station sends indication information to the terminal through MsgB, where the indication information carries one resource configuration information in the resource configuration information of the multiple dedicated search spaces;

Step 1502: The terminal determines the resource configuration information of the dedicated search space for transmitting small data according to the received indication information;

Step 1503, the terminal and the base station determine the CORESET corresponding to the dedicated search space according to the one resource configuration information;

Step 1504, the terminal and the base station use the RNTI of the terminal as the randomization parameter of the hash function in the CORESET, based on the hash function according to the AL of the dedicated search space and the number of PDCCH candidates corresponding to the AL, determining the PDCCH resource for transmitting the small data in the search space;

Step 1505a: After the terminal receives msg4 and before receiving the configuration signaling of USS or type3 PDCCH, the terminal starts to monitor the PDCCH resource, and the base station starts to send DCI, where the DCI is carried by the PDCCH resource; or,

Step 1505b, after the terminal receives msgB and before receiving the configuration signaling of USS or type3 PDCCH, the terminal starts to monitor the PDCCH resource, and the base station starts to send DCI, wherein the DCI is carried by the PDCCH resource;

Step 1506, after the terminal receives the resource configuration information of the USS or type3 CSS sent by the base station, the terminal stops monitoring the PDCCH resource, and the base station stops sending DCI, wherein the DCI is carried by the PDCCH resource;

or,

As shown in FIG. 16A and FIG. 16B , taking the network side device as a base station as an example, this embodiment provides a method in which the terminal determines the resource configuration information of the dedicated search space by displaying signaling, and the base station uses RRC signaling to determine the resource configuration information of multiple dedicated search spaces. The resource configuration information of the space is sent to the terminal, and the base station sends the indication information to the terminal through a contention resolution message. The specific implementation steps are as follows:

Step 1600: Before the terminal enters the connected state, the base station sends the resource configuration information of multiple dedicated search spaces to the terminal through RRC signaling;

Step 1601a, the base station sends indication information to the terminal through Msg4, where the indication information carries one resource configuration information in the resource configuration information of the multiple dedicated search spaces;

Step 1601b, the base station sends indication information to the terminal through MsgB, where the indication information carries one resource configuration information in the resource configuration information of the multiple dedicated search spaces;

Step 1602: The terminal determines the resource configuration information of the dedicated search space for transmitting small data according to the received indication information;

Step 1603, the terminal and the base station determine the CORESET corresponding to the dedicated search space according to the one resource configuration information;

Step 1604, the terminal and the base station use the RNTI of the terminal as the randomization parameter of the hash function in the CORESET, based on the hash function according to the AL of the dedicated search space and the number of PDCCH candidates corresponding to the AL, determining the PDCCH resource for transmitting the small data in the search space;

Step 1605a, after the terminal receives msg4 and before receiving the configuration signaling of USS or type3 PDCCH, the terminal starts to monitor the PDCCH resource, and the base station starts to send DCI, wherein the DCI is carried by the PDCCH resource; or,

Step 1605b, after the terminal receives msgB and before receiving the configuration signaling of USS or type3 PDCCH, the terminal starts to monitor the PDCCH resource, and the base station starts to send DCI, wherein the DCI is carried by the PDCCH resource;

Step 1606: After the terminal receives the resource configuration information of the USS or type3 CSS sent by the base station, the terminal stops monitoring the PDCCH resource, and the base station stops sending DCI, wherein the DCI is carried by the PDCCH resource.

As shown in FIG. 17A and FIG. 17B , taking the network side device as a base station as an example, this embodiment provides a kind of resource configuration information of a part of a dedicated search space that is pre-defined by the base station and the terminal, and the base station uses SIB1 to define the part of the dedicated search space. The remaining part of the resource configuration information is sent to the terminal, and the specific implementation steps are as follows:

Step 1700: Before the terminal enters the connected state, the terminal and the base station determine the first part of resource configuration information of a dedicated search space for transmitting small data according to the first part of resource configuration information of a predefined dedicated search space;

Step 1701, the base station broadcasts the second part of resource configuration information of a dedicated search space to the terminal through SIB1;

Step 1702, the base station and the terminal determine the resource configuration information of the dedicated search space for transmitting small data according to the predefined first part of resource configuration information and the second part of resource configuration information;

Step 1703, the terminal and the base station determine the CORESET corresponding to the dedicated search space according to the resource configuration information;

Step 1704, the terminal and the base station use the RNTI of the terminal as the randomization parameter of the hash function in the CORESET, based on the hash function according to the AL of the dedicated search space and the number of PDCCH candidates corresponding to the AL, determining the PDCCH resource for transmitting the small data in the search space;

Step 1705a, after the terminal receives msg4 and before receiving the configuration signaling of USS or type3 PDCCH, the terminal starts to monitor the PDCCH resource, and the base station starts to send DCI, wherein the DCI is carried by the PDCCH resource; or,

Step 1705b, after the terminal receives msgB and before receiving the configuration signaling of USS or type3 PDCCH, the terminal starts to monitor the PDCCH resource, and the base station starts to send DCI, wherein the DCI is carried by the PDCCH resource;

Step 1706, after the terminal receives the resource configuration information of the USS or type3 CSS sent by the base station, the terminal stops monitoring the PDCCH resource, and the base station stops sending DCI, wherein the DCI is carried by the PDCCH resource;

or,

As shown in FIG. 18A and FIG. 18B , taking the network side device as a base station as an example, this embodiment provides a method for the base station and the terminal to predefine part of the resource configuration information of a dedicated search space, and the base station uses RRC signaling to configure the dedicated search space. The resource configuration information of the remaining part of the space is sent to the terminal, and the specific implementation steps are as follows:

Step 1800, before the terminal enters the connected state, the terminal and the base station determine the first part of the resource configuration information of a dedicated search space for transmitting small data according to the first part of the resource configuration information of a predefined dedicated search space;

Step 1801, the base station sends the second part of resource configuration information of a dedicated search space to the terminal through RRC signaling;

Step 1802, the base station and the terminal determine the resource configuration information of the dedicated search space for transmitting small data according to the predefined first part of resource configuration information and the second part of resource configuration information;

Step 1803, the terminal and the base station determine the CORESET corresponding to the dedicated search space according to the resource configuration information;

Step 1804, the terminal and the base station use the RNTI of the terminal as the randomization parameter of the hash function in the CORESET, and based on the hash function according to the AL of the dedicated search space and the number of PDCCH candidates corresponding to the AL, determining the PDCCH resource for transmitting the small data in the search space;

Step 1805a: After the terminal receives msg4 and before receiving the configuration signaling of USS or type3 PDCCH, the terminal starts to monitor the PDCCH resource, and the base station starts to send DCI, where the DCI is carried by the PDCCH resource; or,

Step 1805b, after the terminal receives msgB and before receiving the configuration signaling of USS or type3 PDCCH, the terminal starts to monitor the PDCCH resource, and the base station starts to send DCI, wherein the DCI is carried by the PDCCH resource;

Step 1806: After the terminal receives the resource configuration information of the USS or type3 CSS sent by the base station, the terminal stops monitoring the PDCCH resource, and the base station stops sending DCI, wherein the DCI is carried by the PDCCH resource.

Embodiment 4. Based on the same inventive concept, the embodiment of the present invention also provides a resource allocation terminal for small data transmission, because the terminal is a terminal corresponding to the method of the embodiment of the present invention, and the principle of the terminal to solve the problem is the same as that of the method. Similar, therefore, the implementation of the terminal may refer to the implementation of the method, and the repetition will not be repeated.

As shown in FIG. 19 , an embodiment of the present invention further provides a resource allocation terminal for small data transmission. The terminal includes: a memory 1920, a transceiver 1900, and a processor 1910:

On the terminal side, before entering the connection state, determine the resource configuration information of the dedicated search space for transmitting small data, wherein the small data is used to represent data whose data amount is less than a threshold;

memory 1920 for storing computer programs;

The transceiver 1900 is used to receive and transmit data under the control of the processor 1910 .

19, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 1910 and various circuits of memory represented by memory 1920 are linked together. The bus architecture can also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides the interface. Transceiver 1900 may be a number of elements, including transmitters and receivers, providing means for communicating with various other devices over transmission media including wireless channels, wired channels, fiber optic cables, and the like Transmission medium. For different user equipments, the user interface 1930 may also be an interface capable of externally connecting the required equipment, and the connected equipment includes but is not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 1910 is responsible for managing the bus architecture and general processing, and the memory 1920 may store data used by the processor 1910 in performing operations.

Optionally, the processor 1910 may be a CPU (central processor), an ASIC (Application Specific Integrated Circuit, an application-specific integrated circuit), an FPGA (Field-Programmable Gate Array, a field programmable gate array) or a CPLD (Complex Programmable Logic Device) , complex programmable logic device), the processor 1910 may also adopt a multi-core architecture.

The processor 1910 is configured to execute any of the methods provided in the embodiments of the present application according to the obtained executable instructions by calling the computer program stored in the memory 1920 . The processor 1910 and the memory 1920 may also be arranged physically separately.

As an optional implementation manner, the processor 1910 is specifically configured to execute:

The processor 1910 is specifically configured to execute:

the aggregation level AL of the dedicated search space;

blind detection period parameters of the dedicated search space;

The control resource set CORESET corresponding to the dedicated search space.

As an optional implementation manner, after determining the PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space, the processor 1910 is further configured to execute:

As an optional implementation manner, after determining the physical downlink control channel PDCCH resource for transmitting the small data, the processor 1910 is specifically further configured to execute:

After receiving Msg2 or Msg4 or MsgB, start monitoring the PDCCH resource; or,

Before sending Msg1 or Msg3 or MsgA, start monitoring the PDCCH resource.

As an optional implementation manner, after the PDCCH resource for transmitting the small data is determined before entering the connected state for the first time, the processor 1910 is further configured to execute:

As an optional implementation manner, after entering the connected state this time and before entering the connected state next time, the processor 1910 is further configured to execute:

It should be noted here that the above-mentioned terminal provided in this embodiment of the present invention can implement all the method steps implemented by the above-mentioned method embodiment, and can achieve the same technical effect, which is not the same as the method embodiment in this embodiment. The parts and beneficial effects will be described in detail.

Embodiment 5. Based on the same inventive concept, the embodiment of the present invention also provides a network-side device for resource allocation for small data transmission, because the device is a device corresponding to the method of the embodiment of the present invention, and the principle of the device to solve the problem is the same as that of the device. The method is similar, so the implementation of the device can refer to the implementation of the method, and the repetition will not be repeated.

As shown in FIG. 20 , an embodiment of the present invention further provides a resource allocation network-side device for small data transmission. The device includes: a memory 2020, a transceiver 2000, and a processor 2010:

On the network device side, before determining that the terminal enters the connected state, determine the resource configuration information of the dedicated search space for transmitting small data of the terminal, wherein the small data is used to represent data whose data amount is less than a threshold;

memory 2020 for storing computer programs;

The transceiver 2000 is used for receiving and transmitting data under the control of the processor 2010 .

20, the bus architecture may include any number of interconnected buses and bridges, specifically, one or more processors represented by the processor 2010 and various circuits of the memory represented by the memory 2020 are linked together. The bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein. The bus interface provides the interface. Transceiver 2000 may be multiple elements, ie, including transmitters and receivers, providing means for communicating with various other devices over transmission media including wireless channels, wired channels, fiber optic cables, and the like. The processor 2010 is responsible for managing the bus architecture and general processing, and the memory 2020 may store data used by the processor 2010 in performing operations.

The processor 2010 may be a central processor (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (Complex Programmable Logic Device). , CPLD), the processor 2010 may also adopt a multi-core architecture.

As an optional implementation manner, the processor 2010 is specifically configured to execute:

The processor 2010 is specifically configured to execute:

the aggregation level AL of the dedicated search space;

blind detection period parameters of the dedicated search space;

The control resource set CORESET corresponding to the dedicated search space.

As an optional implementation manner, after determining the resource configuration information of the dedicated search space for transmitting the small data of the terminal, the processor 2010 is specifically further configured to execute:

As an optional implementation manner, after determining the PDCCH resource for transmitting the small data, the processor 2010 is specifically further configured to execute:

As an optional implementation manner, after determining the PDCCH resource for transmitting the small data, the processor 2010 is further configured to execute:

As an optional implementation manner, before determining that the terminal enters the connected state for the first time, after determining the PDCCH resource for transmitting the small data, the processor 2010 is further configured to execute:

As an optional implementation manner, after it is determined that the terminal enters the connected state this time and before entering the connected state next time, the processor 2010 is further configured to execute:

Sending indication signaling, where the indication signaling is used to instruct the terminal to transmit the small data according to the resource configuration information determined after entering the connected state this time before entering the connected state next time.

It should be noted here that the above-mentioned device provided by the embodiment of the present invention can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect, and the same as the method embodiment in this embodiment is not repeated here. The parts and beneficial effects will be described in detail.

Embodiment 6. Based on the same inventive concept, the embodiment of the present invention also provides a resource allocation device for small data transmission, because the device is a device corresponding to the method of the embodiment of the present invention, and the principle of solving the problem of the device is the same as that of the method. Similar, therefore, the implementation of the device can refer to the implementation of the method, and the repetition will not be repeated.

It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and other division methods may be used in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a processor-readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

As shown in Figure 21, the device includes:

Determining resource configuration unit 2100, configured to determine resource configuration information of a dedicated search space for transmitting small data before entering the connected state, wherein the small data is used to represent data whose data amount is less than a threshold;

The determining transmission resource unit 2101 is configured to determine the physical downlink control channel PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space.

As an optional implementation manner, the determining resource configuration unit 2100 is specifically configured to:

The determining resource configuration unit 2100 is specifically used for:

the aggregation level AL of the dedicated search space;

blind detection period parameters of the dedicated search space;

The control resource set CORESET corresponding to the dedicated search space.

As an optional implementation manner, the determining transmission resource unit 2101 is specifically used for:

As an optional implementation manner, after determining the PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space, the determining transmission resource unit 2101 is further used for:

As an optional implementation manner, after determining the physical downlink control channel PDCCH resource for transmitting the small data, the determining transmission resource unit 2101 is further used for:

After receiving Msg2 or Msg4 or MsgB, start monitoring the PDCCH resource; or,

Before sending Msg1 or Msg3 or MsgA, start monitoring the PDCCH resource.

As an optional implementation manner, after the PDCCH resource for transmitting the small data is determined before entering the connected state for the first time, the determining transmission resource unit 2101 is specifically further used for:

As an optional implementation manner, after entering the connected state this time and before entering the connected state next time, the determining transmission resource unit 2101 is specifically further used to:

Embodiment 7. Based on the same inventive concept, the embodiment of the present invention also provides a resource allocation device for small data transmission, because the device is a device corresponding to the method of the embodiment of the present invention, and the principle of the device to solve the problem is the same as that of the method. Similar, therefore, the implementation of the device can refer to the implementation of the method, and the repetition will not be repeated.

As shown in Figure 22, the device includes:

A determining resource configuration unit 2200, configured to determine resource configuration information of a dedicated search space for transmitting small data of the terminal before determining that the terminal enters the connected state, wherein the small data is used to represent data whose data volume is less than a threshold;

The determining resource transmission unit 2201 is configured to determine the physical downlink control channel PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space.

As an optional implementation manner, the determining resource configuration unit 2200 is specifically configured to:

The determining resource configuration unit 2200 is specifically used for:

the aggregation level AL of the dedicated search space;

blind detection period parameters of the dedicated search space;

The control resource set CORESET corresponding to the dedicated search space.

As an optional implementation manner, the determining resource transmission unit 2201 is specifically configured to:

As an optional implementation manner, after determining the resource configuration information of the dedicated search space for transmitting the small data of the terminal, the determining resource transmission unit 2201 is further configured to:

As an optional implementation manner, after determining the PDCCH resource for transmitting the small data, the determining resource transmission unit 2201 is further used for:

As an optional implementation manner, before determining that the terminal enters the connected state for the first time, after determining the PDCCH resource for transmitting the small data, the determining resource transmission unit 2201 is further configured to:

As an optional implementation manner, after determining that the terminal enters the connected state this time and before entering the connected state next time, the determining resource transmission unit 2201 is further configured to:

This embodiment also provides a computer storage medium, the processor-readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic memory (eg, floppy disk, hard disk, magnetic tape, magnetic Optical disk (MO), etc.), optical memory (such as CD, DVD, BD, HVD, etc.), and semiconductor memory (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid state disk (SSD)) and the like.

This embodiment also provides a computer storage medium, and when the program is executed by the processor, the steps of the following method are implemented:

The present application is described above with reference to block diagrams and/or flowchart illustrations illustrating methods, apparatus (systems) and/or computer program products according to embodiments of the present application. It will be understood that a block of the block diagrams and/or flowchart illustrations, and combinations of blocks of the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. These computer program instructions may be provided to a general purpose computer, a processor of a special purpose computer and/or other programmable data processing apparatus to produce a machine such that the instructions executed via the computer processor and/or other programmable data processing apparatus create a Methods of implementing the functions/acts specified in the block diagrams and/or flowchart blocks.

Accordingly, the present application may also be implemented in hardware and/or software (including firmware, resident software, microcode, etc.). Still further, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by an instruction execution system or Used in conjunction with an instruction execution system. In the context of this application, a computer-usable or computer-readable medium can be any medium that can contain, store, communicate, transmit, or transmit a program for use by, or in connection with, an instruction execution system, apparatus, or device. device or equipment use.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

A resource allocation method for small data transmission, characterized in that the method comprises:

Before entering the connection state, the terminal determines the resource configuration information of the dedicated search space for transmitting small data, wherein the small data is used to represent data whose data amount is less than a threshold;

The terminal determines the physical downlink control channel PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space.
The method according to claim 1, wherein the determining, by the terminal, resource configuration information of a dedicated search space for transmitting small data, comprises:

The terminal determines the resource configuration information of the dedicated search space for transmitting small data according to the resource configuration information of the predefined at least one dedicated search space; and/or,

The terminal determines the resource configuration information of the dedicated search space for transmitting small data according to the received explicit signaling carrying the resource configuration information of at least one dedicated search space, where the explicit signaling includes broadcast signaling or dedicated signaling.
The method according to claim 2, wherein the resource configuration information of the dedicated search space is multiple, and each resource configuration information corresponds to a unique resource configuration information number;

The terminal determines the resource configuration information of the dedicated search space for transmitting small data, including:

The terminal determines the resource configuration information corresponding to the RO number from the plurality of resource configuration information according to the mapping relationship between the random access occasion RO number selected by sending the random access preamble preamble and the resource configuration information number ;or,

The terminal determines the resource configuration information corresponding to the SSB index value from the plurality of resource configuration information according to the received synchronization signal and the mapping relationship between the physical broadcast channel block SSB index value and the resource configuration information number; or ,

The terminal determines resource configuration information corresponding to the indication information from the plurality of resource configuration information according to the indication information carried in the received contention resolution message Msg4 or MsgB.
The method according to any one of claims 1 to 3, wherein the resource configuration information includes any one or more of the following:

the aggregation level AL of the dedicated search space;

The number of candidates of the PDCCH candidate set corresponding to each AL of the dedicated search space;

blind detection period parameters of the dedicated search space;

The control resource set CORESET corresponding to the dedicated search space.
The method according to claim 1, wherein the terminal determines the PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space, comprising:

The terminal determines the CORESET corresponding to the dedicated search space according to the resource configuration information;

In the CORESET, the terminal determines the PDCCH resource according to the wireless network temporary identifier RNTI of the terminal, the AL of the dedicated search space, and the number of PDCCH candidates corresponding to the AL, wherein the RNTI includes a temporary The cell radio network temporary identifier TC-RNTI or the cell radio network temporary identifier C-RNTI.
The method according to claim 5, wherein determining the PDCCH resource by the terminal comprises:

The terminal uses the RNTI as a randomization parameter of the hash function, and determines the PDCCH resource for transmitting the small data in the search space according to the AL and the number of PDCCH candidates corresponding to the AL based on the hash function.
The method according to claim 1, wherein after the terminal determines the PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space, the method further comprises:

The terminal detects and receives the downlink control information DCI of the small data in the dedicated search space, wherein the cyclic redundancy check CRC of the DCI is obtained by scrambling the C-RNTI of the terminal.
The method according to claim 1, wherein after the terminal determines the physical downlink control channel (PDCCH resource) for transmitting the small data, the method further comprises:

After receiving Msg2 or Msg4 or MsgB, the terminal starts to monitor the PDCCH resource; or,

The terminal starts to monitor the PDCCH resource before sending Msg1 or Msg3 or MsgA.
The method according to claim 1, wherein after the terminal determines the physical downlink control channel (PDCCH resource) for transmitting the small data, the method further comprises:

The terminal stops monitoring the PDCCH resource after receiving the RRC release signaling; or,

After receiving the resource configuration information of the user-specific search space USS and/or the type type3 common search space CSS, the terminal stops monitoring the PDCCH resource.
The method according to claim 1, wherein, before the terminal enters the connected state for the first time, after determining the PDCCH resource for transmitting the small data, the method further comprises:

Before entering the connected state next time, the terminal transmits the small data according to the PDCCH resource determined before entering the connected state for the first time.
The method according to claim 1, wherein after the terminal enters the connected state this time and before entering the connected state next time, the terminal further comprises:

The terminal transmits the small data according to the resource configuration information determined after entering the connected state this time; or,

The terminal transmits the small data according to the received indication signaling, wherein the indication signaling is used to instruct the terminal to transmit the small data according to the resource configuration information determined after entering the connected state this time.
A resource allocation method for small data transmission, characterized in that the method comprises:

Before determining that the terminal enters the connected state, the base station determines the resource configuration information of the dedicated search space for transmitting the small data of the terminal, wherein the small data is used to indicate that the data amount is less than the threshold data;

The base station determines the physical downlink control channel PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space.
The method according to claim 12, wherein the determining, by the base station, the resource configuration information of the dedicated search space for transmitting the small data of the terminal, comprises:

The base station determines the resource configuration information of the dedicated search space for transmitting the small data of the terminal according to the resource configuration information of the predefined at least one dedicated search space.
The method according to claim 13, wherein the resource configuration information of the dedicated search space is multiple, and each resource configuration information corresponds to a unique resource configuration information number;

The base station determines the resource configuration information of the dedicated search space for transmitting the small data of the terminal, including:

The base station determines the resource configuration information corresponding to the RO number from the plurality of resource configuration information according to the mapping relationship between the received random access opportunity RO number and the resource configuration information number; or,

The base station determines the resource configuration information corresponding to the SSB index value from the plurality of resource configuration information according to the mapping relationship between the synchronization signal and the physical broadcast channel block SSB index value and the resource configuration information number; or,

The base station itself determines resource configuration information from the plurality of resource configuration information.
The method according to any one of claims 12 to 14, wherein the resource configuration information includes any one or more of the following:

the aggregation level AL of the dedicated search space;

The number of candidates of the PDCCH candidate set corresponding to each AL of the dedicated search space;

blind detection period parameters of the dedicated search space;

The control resource set CORESET corresponding to the dedicated search space.
The method according to claim 12, wherein the base station determines the PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space, comprising:

The base station determines the CORESET corresponding to the dedicated search space according to the resource configuration information;

In the CORESET, the base station determines the PDCCH resource according to the determined RNTI of the terminal, the AL of the dedicated search space, and the number of PDCCH candidates corresponding to the AL, wherein the wireless network temporarily identifies the RNTI. Including the temporary cell radio network temporary identifier TC-RNTI or the cell radio network temporary identifier C-RNTI.
The method according to claim 16, wherein the base station determines the PDCCH resource, comprising:

The base station uses the RNTI as a randomization parameter of the hash function, and determines the PDCCH resource for transmitting the small data in the search space according to the AL and the number of PDCCH candidates corresponding to the AL based on the hash function.
The method according to claim 13, wherein after the base station determines the resource configuration information of the dedicated search space for transmitting the small data of the terminal, the method further comprises:

The base station sends the at least one resource configuration information to the terminal through display signaling, where the display signaling includes broadcast signaling or dedicated signaling; or,

The base station sends the at least one resource configuration information to the terminal through a contention resolution message Msg4 or MsgB.
The method according to claim 12, wherein after the base station determines the PDCCH resource for transmitting the small data, the method further comprises:

The base station sends the downlink control information DCI of the small data in the dedicated search space, wherein the cyclic redundancy check (CRC) of the DCI is obtained by scrambling the C-RNTI of the terminal.
The method according to claim 12, wherein after the base station determines the PDCCH resource for transmitting the small data, the method further comprises:

After sending Msg2 or Msg4 or MsgB, the base station starts to send downlink control information DCI, where the DCI is carried by the PDCCH resource; or,

After receiving the Msg1 or Msg3 or MsgA, the base station starts to transmit DCI, wherein the DCI is carried by the PDCCH resource.
The method according to claim 12, wherein after the base station determines the PDCCH resource for transmitting the small data, the method further comprises:

The base station stops sending DCI after sending the RRC release signaling, wherein the DCI is carried by the PDCCH resource; or,

After sending the resource configuration information of the user-specific search space USS and/or the type-3 common search space CSS, the base station stops sending DCI, where the DCI is borne by the PDCCH resource.
The method according to claim 12, wherein, before the base station determines that the terminal enters the connected state for the first time, after determining the PDCCH resource for transmitting the small data, the base station further comprises:

The base station determines that before the terminal enters the connected state next time, the small data is transmitted according to the PDCCH resource determined before the first entry into the connected state.
The method according to claim 12, wherein after determining that the terminal enters the connected state this time and before entering the connected state next time, the base station further comprises:

The base station transmits the small data according to the resource configuration information determined after the terminal enters the connected state this time; and/or,

The base station sends instruction signaling, where the instruction signaling is used to instruct the terminal to transmit the small data according to the resource configuration information determined after entering the connected state this time before entering the connected state next time.
A resource allocation terminal for small data transmission, characterized in that it includes a memory, a transceiver, and a processor:

a memory for storing a computer program; a transceiver for sending and receiving data under the control of the processor; a processor for reading the computer program in the memory and performing the following operations:

Before entering the connection state, determine the resource configuration information of the dedicated search space for transmitting small data, wherein the small data is used to represent data whose data amount is less than a threshold;

Determine the physical downlink control channel PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space.
A resource allocation network-side device for small data transmission, characterized in that it includes a memory, a transceiver, and a processor:

a memory for storing a computer program; a transceiver for sending and receiving data under the control of the processor; a processor for reading the computer program in the memory and performing the following operations:

Before it is determined that the terminal enters the connected state, the resource configuration information of the dedicated search space for transmitting small data of the terminal is determined, wherein the small data is used to represent data whose data amount is less than a threshold;

Determine the physical downlink control channel PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space.
A resource allocation device for small data transmission, comprising:

determining a resource configuration unit, configured to determine resource configuration information of a dedicated search space for transmitting small data before entering the connected state, wherein the small data is used to represent data whose data volume is less than a threshold;

determining a transmission resource unit, configured to determine the physical downlink control channel PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space.
A resource allocation device for small data transmission, comprising:

determining a resource configuration unit, configured to determine resource configuration information of a dedicated search space for transmitting small data of the terminal before it is determined that the terminal enters the connected state, wherein the small data is used to represent data whose data volume is less than a threshold;

A determining resource transmission unit, configured to determine the physical downlink control channel PDCCH resource for transmitting the small data according to the resource configuration information of the dedicated search space.
A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program, and the computer program is used to cause the processor to execute any one of claims 1 to 11 or 12 to 23 the method described.