CN117156580A

CN117156580A - Communication method, device, network equipment, terminal and storage medium

Info

Publication number: CN117156580A
Application number: CN202210546647.9A
Authority: CN
Inventors: 温金辉; 刘亮; 黄学艳; 田振
Original assignee: China Mobile Zijin Jiangsu Innovation Research Institute Co ltd; China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Zijin Jiangsu Innovation Research Institute Co ltd; China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2023-12-01

Abstract

The embodiment of the invention discloses a communication method, a device, a network device, a terminal and a storage medium, wherein the method comprises the following steps: the method comprises the steps that network equipment sends a first message to a terminal, wherein the first message is used for indicating to activate a pre-configured semi-persistent scheduling (SPS) resource, and the SPS resource is used for receiving a downlink small data packet by the terminal in a non-activated state; the network device receives a first uplink transmission sent by the terminal, and determines a first synchronization signal/physical broadcast channel block (SSB) for use in downlink transmission on the SPS resources based on the first uplink transmission.

Description

Communication method, device, network equipment, terminal and storage medium

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a communications method, an apparatus, a network device, a terminal, and a storage medium.

Background

The small data packet transmission (SDT, small Data Transmission) is a technology for implementing small data transmission in a radio resource control (RRC, radio Resource Control) INACTIVE state (rrc_inactive) and the scheme is mainly directed to uplink transmission. Whether or not to use a small data transmission scheme may depend on the configuration of the network, including the configuration of the data amount threshold and the reference signal received power (RSRP, reference Signal Receiving Power) threshold.

The terminal determines whether to use an uplink small data transmission scheme or request a transition to an RRC connection (rrc_connected) state for uplink data transmission based on the data amount threshold and the RSRP threshold. When the size of the uplink data packet is smaller than the data volume threshold, and the downlink RSRP is larger than the configured RSRP threshold and effective transmission resources are available, the terminal initiates packet transmission, so that the transmission efficiency is improved and the transmission delay is reduced.

Currently, a terminal in an RRC INACTIVE (rrc_inactive) state does not support downlink user plane data transmission. When the terminal is in rrc_inactive state, if there is downlink data arriving in the core network and needs to be sent, paging (Paging) is initiated by the core network or the radio access network (RAN, radio Access Network) side. After receiving the paging request, the terminal resumes the RRC connection (i.e. enters the rrc_connected state) through the RRC connection resume procedure, and then performs downlink data transmission. But for SDT this introduces unnecessary power consumption and signaling overhead and creates a large delay.

That is, the current small packet transmission scheme is mainly directed to uplink transmission, and does not involve downlink transmission.

Disclosure of Invention

In order to solve the existing technical problems, the embodiment of the invention provides a communication method, a device, network equipment, a terminal and a storage medium.

In order to achieve the above object, the technical solution of the embodiment of the present invention is as follows:

in a first aspect, an embodiment of the present invention provides a communication method, including:

the network equipment sends a first message to the terminal, wherein the first message is used for indicating to activate a pre-configured Semi-persistent scheduling (SPS, semi-Persistent Scheduling) resource, and the SPS resource is used for the terminal to receive a downlink small data packet in a non-activated state;

the network device receives a first uplink transmission sent by the terminal, and determines a first synchronization signal/physical broadcast channel block (SSB, synchronization Signal and Physical Broadcast Channel block) for use in downlink transmission on the SPS resources based on the first uplink transmission.

In the above scheme, the network device receives the first uplink transmission sent by the terminal, including: the network device receives a first physical uplink shared channel (PUSCH, physical Uplink Shared Channel) sent by the terminal based on a Configured Grant (CG) resource, where the first PUSCH carries a first media access Control Element (MAC CE, media Access Control-Control Element); the first MAC CE includes at least index information of the first SSB.

In the above solution, the determining, based on the first uplink transmission, the first SSB used for downlink transmission on the SPS resource includes: the network equipment determines the first SSB according to the index information of the first SSB; or the network equipment determines the first SSB according to the beam used by the terminal to send the first PUSCH.

In the above scheme, the method further comprises: the network device sends a second message to the terminal, wherein the second message is used for indicating the CG resource, and the CG resource is used for sending an uplink small data packet to the network device by the terminal.

In the above solution, the network device receives a first uplink transmission sent by the terminal, determines, based on the first uplink transmission, a first SSB used for downlink transmission on the SPS resource, and includes: the network equipment receives a second PUSCH sent by the terminal, wherein the second PUSCH carries a second MAC CE; the second MAC CE includes at least index information of the first SSB; the second PUSCH is a PUSCH used for transmitting MsgA in a two-step random access process; the network device determines the first SSB according to the index information of the first SSB.

In the above scheme, the second MAC CE further includes a first field, where a value of the first field is used to indicate whether MsgA of the second PUSCH transmission is only used to feed back the first message.

In the above scheme, the value of the first field includes a first value and a second value; the method further comprises the steps of: under the condition that the value of the first field is a first value, the network equipment does not send MsgB in the two-step random access process; and under the condition that the value of the first field is a second value, the network equipment sends MsgB in the two-step random access process to the terminal, wherein the MsgB comprises a downlink small data packet.

In the above solution, the network device receives a first uplink transmission sent by the terminal, determines, based on the first uplink transmission, a first SSB used for downlink transmission on the SPS resource, and includes: the network device receives a random access sequence (preamble) of a random access process sent by the terminal, and determines the first SSB corresponding to the preamble.

In the above scheme, the method further comprises: the network equipment sends a downlink small data packet to the terminal in an inactive state based on the first SSB; receiving a second uplink transmission sent by the terminal, and updating a first SSB used for downlink transmission on the SPS resource based on the second uplink transmission; and the network equipment sends a downlink small data packet to the terminal in the inactive state based on the updated first SSB.

In the above scheme, the method further comprises: the network device sends a third message to the terminal, where the third message is used to indicate the SPS resource.

In the above solution, the third message is further configured to instruct the terminal to enter an inactive state.

In the above solution, the third message includes at least one of the following: the periodicity of the SPS resources, time frequency location, modulation coding scheme (MCS, modulation and Coding Scheme), and hybrid automatic repeat request (HARQ, hybrid Automatic Repeat Request).

In the above scheme, the method further comprises: the network equipment sends a fourth message to the terminal, wherein the fourth message is used for indicating to trigger the random access process of the terminal; and sending a downlink small data packet to the terminal based on the random access process.

In a second aspect, an embodiment of the present invention provides a communication method, including:

the method comprises the steps that a terminal receives a first message sent by network equipment, wherein the first message is used for indicating to activate a pre-configured SPS resource, and the SPS resource is used for receiving a downlink small data packet under a non-activated state by the terminal;

and the terminal sends a first uplink transmission to the network equipment, wherein the first uplink transmission is used for determining a first SSB used for downlink transmission on the SPS resource by the network equipment.

In the above scheme, the sending, by the terminal, the first uplink transmission to the network device includes: the terminal sends a first PUSCH to the network equipment based on CG resources, wherein the first PUSCH carries a first MAC CE; the first MAC CE includes at least index information of the first SSB.

In the above scheme, the method further comprises: the terminal receives a second message sent by the network device, wherein the second message is used for indicating the CG resource, and the CG resource is used for sending an uplink small data packet to the network device by the terminal.

In the above scheme, the sending, by the terminal, the first uplink transmission to the network device includes: the terminal sends a second PUSCH to the network equipment, wherein the second PUSCH carries a second MAC CE; the second MAC CE includes at least index information of the first SSB; the second PUSCH is a PUSCH used for transmitting MsgA in the two-step random access procedure.

In the above scheme, the value of the first field includes a first value and a second value; the method further comprises the steps of: determining that the value of the first field is a first value when the MsgA of the second PUSCH transmission is only used for feeding back the first message; and determining that the value of the first field is a second value when the MsgA of the second PUSCH transmission is not only used for feeding back the first message.

In the above scheme, the sending, by the terminal, the first uplink transmission to the network device includes: and the terminal sends a preamble of the random access process to the network equipment.

In the above scheme, the method further comprises: the terminal receives a downlink small data packet sent by the network equipment based on the first SSB on the SPS resource; sending a second uplink transmission to the network device, the second uplink transmission being used by the network device to update a first SSB used for downlink transmission on the SPS resources; and the terminal receives a downlink small data packet sent by the network equipment based on the updated first SSB on the SPS resource.

In the above scheme, the terminal receives, on the SPS resource, a downlink small data packet sent by the network device based on the first SSB, including: in a preset time range after sending a first uplink transmission, the terminal receives a downlink small data packet sent by the network equipment based on the first SSB on the SPS resource; the terminal receives a downlink small data packet sent by the network equipment based on the updated first SSB on the SPS resource, and the downlink small data packet comprises the following components: and in the preset time range after the second uplink transmission is sent, the terminal receives the downlink small data packet sent by the network equipment based on the updated first SSB on the SPS resource.

In the above scheme, the method further comprises: and the terminal receives a third message sent by the network equipment, wherein the third message is used for indicating the SPS resource.

In the above solution, the third message includes at least one of the following: the periodicity, time frequency location, MCS and HARQ of the SPS resources.

In the above scheme, the method further comprises: the terminal receives a fourth message sent by the network equipment, wherein the fourth message is used for indicating to trigger a random access process of the terminal; and receiving a downlink small data packet sent by the network equipment based on the random access process.

In a third aspect, an embodiment of the present invention provides a communication apparatus, including:

the first communication module is used for sending a first message to the terminal, wherein the first message is used for indicating to activate a pre-configured SPS resource, and the SPS resource is used for receiving a downlink small data packet by the terminal in a non-activated state; the method is also used for receiving the first uplink transmission sent by the terminal;

and a first processing module configured to determine a first SSB for use in downlink transmissions on the SPS resources based on the first uplink transmission.

In the above scheme, the first communication module is further configured to receive a first PUSCH sent by the terminal based on CG resources, where the first PUSCH carries a first MAC CE; the first MAC CE includes at least index information of the first SSB.

In the above solution, the first processing module is further configured to determine the first SSB according to index information of the first SSB; or the first processing module is further configured to determine the first SSB according to a beam used by the terminal to transmit the first PUSCH.

In the above scheme, the first communication module is further configured to send a second message to the terminal, where the second message is used to indicate the CG resource, and the CG resource is used for the terminal to send an uplink small data packet to the network device.

In the above scheme, the first communication module is further configured to receive a second PUSCH sent by the terminal, where the second PUSCH carries a second MAC CE; the second MAC CE includes at least index information of the first SSB; the second PUSCH is a PUSCH used for transmitting MsgA in a two-step random access process; the first processing module is further configured to determine the first SSB according to index information of the first SSB.

In the above scheme, the value of the first field includes a first value and a second value; the first communication module is further configured to not send MsgB in the two-step random access procedure when the value of the first field is the first value; and under the condition that the value of the first field is a second value, sending MsgB in a two-step random access process to the terminal, wherein the MsgB comprises a downlink small data packet.

In the above scheme, the first communication module is further configured to receive a preamble of a random access procedure sent by the terminal; the first processing module is further configured to determine the first SSB corresponding to the preamble.

In the above scheme, the first communication module is further configured to send a downlink small data packet to the terminal in an inactive state based on the first SSB; and receiving a second uplink transmission sent by the terminal; the first processing module is further configured to update, based on the second uplink transmission, a first SSB used for downlink transmission on the SPS resource; and transmitting a downlink small data packet to the terminal in the inactive state based on the updated first SSB.

In the above scheme, the first communication module is further configured to send a third message to the terminal, where the third message is used to indicate the SPS resource.

In the above scheme, the first communication module is further configured to send a fourth message to the terminal, where the fourth message is used to instruct triggering of a random access procedure of the terminal; the first processing module is further configured to send a downlink small data packet to the terminal based on the random access procedure.

In a fourth aspect, an embodiment of the present invention provides a communication apparatus, including:

the second communication module is used for receiving a first message sent by the network equipment, wherein the first message is used for indicating to activate a pre-configured SPS resource, and the SPS resource is used for receiving a downlink small data packet by the terminal in a non-activated state; and the method is also used for sending a first uplink transmission to the network equipment, wherein the first uplink transmission is used for determining a first SSB used by the network equipment for downlink transmission on the SPS resource.

In the above solution, the second communication module is further configured to send a first PUSCH to the network device based on CG resources, where the first PUSCH carries a first MAC CE; the first MAC CE includes at least index information of the first SSB.

In the above scheme, the second communication module is further configured to receive a second message sent by the network device, where the second message is used to indicate the CG resource, and the CG resource is used for the terminal to send an uplink small data packet to the network device.

In the above solution, the second communication module is further configured to send a second PUSCH to the network device, where the second PUSCH carries a second MAC CE; the second MAC CE includes at least index information of the first SSB; the second PUSCH is a PUSCH used for transmitting MsgA in the two-step random access procedure.

In the above scheme, the value of the first field includes a first value and a second value; the apparatus further comprises: the second processing module is configured to determine that the value of the first field is a first value when the MsgA of the second PUSCH transmission is only used for feeding back the first message; and determining that the value of the first field is a second value when the MsgA of the second PUSCH transmission is not used only for feeding back the first message.

In the above scheme, the second communication module is further configured to send a preamble of a random access procedure to the network device.

In the above solution, the second communication module is further configured to receive, on the SPS resource, a downlink small data packet sent by the network device based on the first SSB; and sending a second uplink transmission to the network device, the second uplink transmission being used by the network device to update the first SSB used for downlink transmission on the SPS resources; the second communication module is further configured to receive, on the SPS resource, a downlink small data packet sent by the network device based on the updated first SSB.

In the above solution, the second communication module is further configured to receive, on the SPS resource, a downlink small data packet sent by the network device based on the first SSB in a preset time range after sending the first uplink transmission; and the second communication module is further configured to receive, on the SPS resource, a downlink small data packet sent by the network device based on the updated first SSB in the preset time range after the second uplink transmission is sent.

In the above solution, the second communication module is further configured to receive a third message sent by the network device, where the third message is used to indicate the SPS resource.

In the above solution, the second communication module is further configured to receive a fourth message sent by the network device, where the fourth message is used to instruct triggering a random access procedure of the terminal; the second communication module is further configured to receive a downlink small data packet sent by the network device based on the random access procedure.

In a fifth aspect, an embodiment of the present invention provides a network device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method of the first aspect when the program is executed.

In a sixth aspect, an embodiment of the present invention provides a terminal, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the steps of the method described in the second aspect.

In a seventh aspect, an embodiment of the present invention provides a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of the method of the first aspect; alternatively, the program when executed by a processor implements the steps of the method of the second aspect described above.

The embodiment of the invention provides a communication method, a device, a network device, a terminal and a storage medium, wherein a pre-configured SPS resource is indicated to be activated through a first message, so that the terminal can receive a downlink small data packet without switching to an RRC connection state, signaling overhead and terminal power consumption are reduced, and delay is reduced by allowing quick transmission of the (small and infrequent) data packet; on the other hand, through the first uplink transmission sent by the terminal for feeding back the first message, the network device can determine the first SSB used for downlink transmission on the SPS resource, and the subsequent downlink SPS transmission can determine the downlink beam by using the downlink beam corresponding to the first SSB without using a beam scanning manner, so that the wireless resource utilization efficiency is improved, and the processing complexity is reduced.

Drawings

Fig. 1 is a flow chart of a communication method according to an embodiment of the invention;

FIG. 2 is a schematic diagram of a process for indicating downlink SPS transmissions via a Paging (Paging) message;

fig. 3 is a schematic diagram of a process of establishing an initial beam between a terminal and a network device;

fig. 4 is a second flow chart of a communication method according to an embodiment of the invention;

fig. 5 is a flow chart of a communication method according to an embodiment of the present invention;

Fig. 6 is a flow chart of a communication method according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a composition structure of a communication device according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a second embodiment of a communication device;

fig. 9 is a schematic hardware structure of a network device according to an embodiment of the present invention;

fig. 10 is a schematic diagram of a hardware structure of a terminal according to an embodiment of the present invention.

Detailed Description

The invention will be described in further detail with reference to the accompanying drawings and specific examples.

The embodiment of the invention provides a communication method which is applied to network equipment. Fig. 1 is a flow chart of a communication method according to an embodiment of the present invention, as shown in fig. 1, the method includes:

step 101, a network device sends a first message to a terminal, wherein the first message is used for indicating to activate a pre-configured Semi-persistent scheduling (SPS, semi-Persistent Scheduling) resource, and the SPS resource is used for the terminal to receive a downlink small data packet in a non-activated state;

step 102, the network device receives a first uplink transmission sent by the terminal, and determines a first synchronization signal/physical broadcast channel block (SSB, synchronization Signal and Physical Broadcast Channel block) used for downlink transmission on the SPS resource based on the first uplink transmission.

Alternatively, the first message may be a Paging (Paging) message. The network device activates downlink SPS transmission through a Paging message, where the Paging message carries indication information related to activating a preconfigured SPS resource, and after receiving the Paging message, the terminal may determine that a downlink small data packet sent by the network device is triggered to be received on the downlink SPS resource.

In step 101, the network device may notify, through a Paging message, the terminal in a radio resource control (RRC, radio Resource Control) INACTIVE (rrc_inactive) state to receive a downlink small data packet on a preconfigured downlink SPS resource when a specific condition is met (e.g., the data amount is below a specific threshold).

It should be noted that, the terminal in rrc_inactive state does not establish the initial beam pair, and the network device does not know the specific beam used for transmitting the downlink data to the terminal on the downlink SPS occasion (occiping), at this time, if the downlink SPS data is transmitted by using the beam scanning manner, multiple SPS occiping needs to be used, and each SPS occiping corresponds to a different beam, which not only causes more radio resources to be occupied, but also causes higher processing complexity.

In step 102, the network device receives a first uplink transmission sent by the terminal, where the first uplink transmission is used by the terminal to feed back the first message, and the network device determines, based on the first uplink transmission, a first SSB used for downlink transmission on the SPS resource. The first SSB, i.e. the corresponding network device, sends an initial beam used by the downlink small data packet to the terminal in rrc_inactive state on the downlink SPS resource.

Illustratively, fig. 2 is a schematic diagram of a process for indicating a downlink SPS transmission via a Paging message. As shown in fig. 2, at each Paging Occasion (PO, paging scheduling), the base station transmits downlink control information (DCI, downlink Control Information) for Paging in a beam scanning manner, and after receiving the Paging message, the terminal may determine an optimal downlink beam and whether it is triggered to receive a downlink small data packet on a downlink SPS. If a Paging message carries indication information indicating downlink SPS activation, i.e., a valid physical downlink control channel (PDCCH, physical Downlink Control Channel) indicated by k=3 in fig. 2, the terminal, after receiving the Paging message, sends a first uplink transmission to the network device to feed back a selected beam (e.g., SSB index information #4 in fig. 2), and the network device determines a downlink beam selected by the terminal after receiving the first uplink transmission, and uses the downlink beam in a subsequent downlink SPS transmission.

In the embodiment, the pre-configured SPS resource is indicated to be activated through the first message, so that the terminal can receive the downlink small data packet without switching to the RRC connection state (rrc_connected) state, signaling overhead and terminal power consumption are reduced, and delay is reduced by allowing quick transmission of the small and infrequent data packet; on the other hand, through the first uplink transmission sent by the terminal for feeding back the first message, the network device can determine the first SSB used for downlink transmission on the SPS resource, and the subsequent downlink SPS transmission can use the downlink beam corresponding to the first SSB for transmission, so that the beam scanning mode is not needed, the wireless resource utilization efficiency is improved, and the processing complexity is reduced.

As an optional implementation manner, in step 102, the receiving, by the network device, the first uplink transmission sent by the terminal may include: the network device receives a first physical uplink shared channel (PUSCH, physical Uplink Shared Channel) sent by the terminal based on a Configured Grant (CG) resource, where the first PUSCH carries a first media access Control Element (MAC CE, media Access Control-Control Element); the first MAC CE includes at least index information of the first SSB.

In this embodiment, when receiving the first message for triggering the downlink SPS transmission, the terminal may perform feedback in uplink transmission corresponding to the first PUSCH, where the first PUSCH uses a preconfigured CG resource and carries a MAC CE to report the selected beam information to the network device. Illustratively, the first MAC CE carries a 6-bit (bit) SSB index (index) field for indicating the SSB (beam) selected by the terminal.

Optionally, the determining, based on the first uplink transmission, the first SSB used for downlink transmission on the SPS resource may include: the network equipment determines the first SSB according to the index information of the first SSB; or the network equipment determines the first SSB according to the beam used by the terminal to send the first PUSCH.

In this embodiment, as an implementation manner, after receiving the first MAC CE, the network device may determine the first SSB used in the subsequent downlink SPS transmission according to the index information. As another embodiment, after receiving the first PUSCH on the CG resource, the network device may determine the beam for uplink transmission, further based on transmit/Receive (Tx/Rx) reciprocity, and may also use the opposite beam for downlink SPS transmission.

In an embodiment, the method may further include: the network device sends a second message to the terminal, wherein the second message is used for indicating the CG resource, and the CG resource is used for sending an uplink small data packet to the network device by the terminal. The second message may be an RRC Release (RRC Release) message, for example.

The first message is fed back in the first PUSCH transmission using CG resources, and carries SSB index information selected by the terminal, so that the network device may determine the first SSB used for downlink transmission based on the SSB index, or may determine the first SSB based on a beam opposite to a beam used for the first PUSCH.

As another alternative embodiment, the step 102 may include: the network equipment receives a second PUSCH sent by the terminal, wherein the second PUSCH carries a second MAC CE; the second MAC CE includes at least index information of the first SSB; the second PUSCH is a PUSCH used for transmitting MsgA in a two-step random access process; the network device determines the first SSB according to the index information of the first SSB.

In this embodiment, when receiving the first message for triggering the downlink SPS transmission, the terminal may perform feedback in uplink transmission corresponding to a second PUSCH, where the second PUSCH is a PUSCH related to the MsgA transmission in a two-step (2-step) random access process, and one MAC CE is carried to report the selected beam information to the network device. Illustratively, the second MAC CE carries a 6bit SSB index field for indicating the SSB (beam) selected by the terminal. And after the network equipment receives the second PUSCH, determining the first SSB used in the subsequent downlink SPS transmission based on the carried index information.

In an embodiment, the second MAC CE may further include a first field, where a value of the first field is used to indicate whether MsgA of the second PUSCH transmission is only used to feed back the first message. In this embodiment, considering that there may be random access procedures triggered by other reasons at the same time, the terminal may only have one random access in progress at the same time, so a first field may be additionally added in the second MAC CE to indicate whether there is random access procedure triggered by other reasons at the same time.

Optionally, the value of the first field includes a first value and a second value; the method may further comprise: under the condition that the value of the first field is a first value, the network equipment does not send MsgB in the two-step random access process; and under the condition that the value of the first field is a second value, the network equipment sends MsgB in the two-step random access process to the terminal, wherein the MsgB comprises a downlink small data packet.

Illustratively, the first field is 1bit, the first value is 0, and the second value is 1. After receiving the MsgA transmitted in the second PUSCH, the network device may determine whether to send the MsgB of the 2-step random access procedure according to the value of the first field. For example, if the 1bit field value additionally carried in the second MAC CE is 0, the network device may determine that MsgA of the second PUSCH transmission is only used for feeding back the first message, where the network device may not send MsgB and the downlink SPS resource is activated, and referring to fig. 2, the terminal will periodically receive the downlink small data packet on the downlink SPS resource from the first available downlink SPS resource after sending the feedback; if the 1bit field value additionally carried in the second MAC CE is 1, the network device may determine that the MsgA of the second PUSCH transmission is not only used for feeding back the first message, but also has a random access procedure triggered by other reasons (such as uplink data arrival), where the network device will send MsgB and send a downlink small data packet in the MsgB.

It should be noted that, in the case that the network device transmits the MsgB (the first field takes the value of the second value or the network device always transmits the MsgB), the terminal may determine whether the downlink SPS transmission is to be activated based on whether the rrc_connected state is entered. If the terminal enters the RRC_CONNECTED state, the downlink SPS resource is not activated, otherwise, the downlink SPS resource is activated to receive continuous downlink small data packets which may exist. If the downlink SPS resource is activated, the terminal will periodically receive downlink small data packets on the downlink SPS resource, starting from the first available downlink SPS resource after MsgB transmission.

The first message is fed back in the second PUSCH transmission related to the MsgA transmission, and the SSB index information selected by the terminal is carried, so that the network device can determine the first SSB used for downlink transmission based on the SSB index.

As yet another alternative embodiment, the step 102 may further include: the network device receives a random access sequence (preamble) of a random access process sent by the terminal, and determines the first SSB corresponding to the preamble.

In this embodiment, the network device may configure a dedicated preamble or physical random access channel (PRACH, physical Random Access Channel) association for the terminal in an RRC Release message, where each preamble/PRACH association combination is associated with a specific SSB. Fig. 3 is a schematic diagram of a process for establishing an initial beam between a terminal and a network device, as shown in fig. 3, when the terminal selects an optimal beam (for example, a beam corresponding to ssb#1 in fig. 3) and feeds back a first message triggering downlink SPS transmission, the terminal may initiate random access by using a preamble/PRACH occalasion associated with the selected SSB, and after receiving the preamble, the network device may determine the first SSB used for subsequent downlink SPS transmission based on an association relationship between a preamble/PRACH occalasion combination and the SSB.

Optionally, the preamble is sent based on Msg1 in a four-step (4-step) random access procedure, and it can be understood that the first uplink transmission in this embodiment is an uplink transmission for sending Msg 1. After the network device receives the Msg1, it does not need to send the Msg2, at this time, the downlink SPS resource is activated, and the terminal will start from the first available downlink SPS resource after feedback (i.e., msg 1) is sent, and periodically receive downlink small data packets on the downlink SPS resource.

In this embodiment, the first message is fed back through Msg1 transmission, so that the network device may determine the first SSB used for downlink transmission according to the association relationship between the preamble/PRACH occalasion combination and the SSB.

The embodiment of the invention also provides a communication method which is applied to the network equipment. Fig. 4 is a second flow chart of a communication method according to an embodiment of the present invention, as shown in fig. 4, the method includes:

step 201, a network device sends a first message to a terminal, wherein the first message is used for indicating to activate a pre-configured SPS resource, and the SPS resource is used for receiving a downlink small data packet by the terminal in an inactive state;

step 202, the network device receives a first uplink transmission sent by the terminal, and determines a first SSB used for downlink transmission on the SPS resource based on the first uplink transmission;

Step 203, the network device sends a downlink small data packet to the terminal in an inactive state based on the first SSB; receiving a second uplink transmission sent by the terminal, and updating a first SSB used for downlink transmission on the SPS resource based on the second uplink transmission;

and 204, the network equipment sends a downlink small data packet to the terminal in an inactive state based on the updated first SSB.

The details of steps 201 to 202 in this embodiment may refer to the details of steps 101 to 102 in the foregoing embodiments, and are not repeated here for brevity.

In this embodiment, after determining the first SSB used for downlink SPS transmission, the network device may use the SSB selected by the terminal for downlink small packet transmission in subsequent downlink SPS transmission, without using a beam scanning manner. For the downlink SPS transmission itself, the terminal may also feed back the downlink SPS transmission and carry the selected SSB (beam) information, that is, the second uplink transmission is used for the terminal to feed back the downlink small data packet sent by the network device, and the network device may update the downlink beam used for the subsequent downlink SPS transmission according to the feedback.

Based on the foregoing embodiments, steps 101 to 102 or steps 201 to 204, the embodiment of the present invention further provides a communication method. The present embodiment further describes a configuration process of SPS resources, and specifically, the method further includes: the network device sends a third message to the terminal, where the third message is used to indicate the SPS resource.

Optionally, the third message includes at least one of the following: the periodicity of the SPS resources, time frequency location, modulation coding scheme (MCS, modulation and Coding Scheme), and hybrid automatic repeat request (HARQ, hybrid Automatic Repeat Request).

In an embodiment, the third message is further used to instruct the terminal to enter an inactive state. For example, the third message may be an RRC Release message, and the network device may enable the terminal to enter an INACTIVE state through the RRC Release message, and configure a downlink SPS resource in the RRC Release message, where the downlink SPS resource specifies information such as a period, a video location, an MCS, and HARQ. It should be noted that, the downlink SPS resource is deactivated by default, and in the deactivated state, the terminal does not attempt to receive downlink data on the downlink SPS resource, and only after receiving the activation instruction of the network device, the terminal receives downlink data on the downlink SPS resource.

In an alternative embodiment of the present invention, when the network device indicates to activate SPS resources by means of the first message, but does not receive corresponding feedback of the terminal in rrc_inactive state, the method may further comprise: the network equipment sends a fourth message to the terminal, wherein the fourth message is used for indicating to trigger the random access process of the terminal; and sending a downlink small data packet to the terminal based on the random access process. In this embodiment, the network device may choose to send the downlink small data packet by triggering the terminal to initiate the random access procedure, instead of continuing to trigger the downlink SPS transmission.

The embodiment of the invention also provides a communication method which is applied to the terminal. Fig. 5 is a flow chart III of a communication method according to an embodiment of the present invention, as shown in fig. 5, the method includes:

step 301, a terminal receives a first message sent by a network device, where the first message is used to instruct to activate a pre-configured SPS resource, and the SPS resource is used to receive a downlink small data packet when the terminal is in an inactive state;

step 302, the terminal sends a first uplink transmission to the network device, where the first uplink transmission is used by the network device to determine a first SSB used for downlink transmission on the SPS resource.

In this embodiment, the first message may be a Paging message, where the Paging message carries indication information related to activating a preconfigured SPS resource, after receiving the Paging message, the terminal may determine that the terminal is triggered to receive a downlink small data packet on the SPS resource, and feedback the Paging message based on a first uplink transmission, so as to inform the network device of selected SSB (beam) information.

As an optional implementation manner, the sending, by the terminal, the first uplink transmission to the network device may include: the terminal sends a first PUSCH to the network equipment based on CG resources, wherein the first PUSCH carries a first MAC CE; the first MAC CE includes at least index information of the first SSB.

Optionally, the method may further include: the terminal receives a second message sent by the network device, wherein the second message is used for indicating the CG resource, and the CG resource is used for sending an uplink small data packet to the network device by the terminal. The second message may be, for example, an RRC Release message.

As another optional implementation manner, the sending, by the terminal, the first uplink transmission to the network device may include: the terminal sends a second PUSCH to the network equipment, wherein the second PUSCH carries a second MAC CE; the second MAC CE includes at least index information of the first SSB; the second PUSCH is a PUSCH used for transmitting MsgA in the two-step random access procedure.

Optionally, the second MAC CE further includes a first field, where a value of the first field is used to indicate whether MsgA of the second PUSCH transmission is only used to feed back the first message.

Illustratively, the value of the first field includes a first value and a second value; the method may further comprise: determining that the value of the first field is a first value when the MsgA of the second PUSCH transmission is only used for feeding back the first message; and determining that the value of the first field is a second value when the MsgA of the second PUSCH transmission is not only used for feeding back the first message.

As yet another optional implementation manner, the sending, by the terminal, the first uplink transmission to the network device may include: and the terminal sends a preamble of the random access process to the network equipment.

The embodiment of the invention also provides a communication method which is applied to the terminal. Fig. 6 is a flow chart of a communication method according to an embodiment of the present invention, as shown in fig. 6, the method includes:

step 401, a terminal receives a first message sent by a network device, where the first message is used to instruct to activate a pre-configured SPS resource, and the SPS resource is used to receive a downlink small data packet when the terminal is in an inactive state;

Step 402, the terminal sends a first uplink transmission to the network device, where the first uplink transmission is used by the network device to determine a first SSB used for downlink transmission on the SPS resource;

step 403, the terminal receives a downlink small data packet sent by the network device based on the first SSB on the SPS resource; sending a second uplink transmission to the network device, the second uplink transmission being used by the network device to update a first SSB used for downlink transmission on the SPS resources;

step 404, the terminal receives, on the SPS resource, a downlink small data packet sent by the network device based on the updated first SSB.

The details of steps 401 to 402 in this embodiment may be specifically referred to the details of steps 301 to 302 in the foregoing embodiments, which are not repeated here for the sake of brevity.

In step 403, since the rrc_inactive state terminal is not necessarily stationary, the downlink beam may change along with the movement of the terminal, and the second uplink transmission in this embodiment is used for the terminal to perform real-time feedback for the downlink SPS transmission, where the feedback may also carry SSB (beam) information selected by the terminal, and the network device may update the downlink beam used for the subsequent downlink SPS transmission according to the feedback.

As an optional implementation manner, in the step 403, the receiving, by the terminal, the downlink small data packet sent by the network device based on the first SSB on the SPS resource may include: in a preset time range after sending a first uplink transmission, the terminal receives a downlink small data packet sent by the network equipment based on the first SSB on the SPS resource; the step 404 may include: and in the preset time range after the second uplink transmission is sent, the terminal receives the downlink small data packet sent by the network equipment based on the updated first SSB on the SPS resource.

Illustratively, this embodiment adds a timer (timer), and during this timer running, the terminal uses the last confirmed downlink beam to attempt to receive the downlink small data packet on the downlink SPS resource; when the timer is overtime, if a new downlink small data packet arrives, the terminal determines a downlink beam by receiving a first message and sending a first uplink transmission for feedback so as to perform subsequent downlink SPS transmission; when the terminal sends a first uplink transmission for the first message or a second uplink transmission for the downlink SPS transmission and carries the corresponding selected SSB information, the timer may be started or restarted.

In an embodiment, the method may further include: and the terminal receives a third message sent by the network equipment, wherein the third message is used for indicating the SPS resource. As an example, the third message is further used to instruct the terminal to enter an inactive state. The third message may be an RRC Release message.

Optionally, the third message includes at least one of the following: the periodicity, time frequency location, MCS and HARQ of the SPS resources.

In an alternative embodiment of the present invention, the method may further include: the terminal receives a fourth message sent by the network equipment, wherein the fourth message is used for indicating to trigger a random access process of the terminal; and receiving a downlink small data packet sent by the network equipment based on the random access process.

The embodiment of the invention also provides a communication device. Fig. 7 is a schematic diagram of a communication device according to an embodiment of the invention, as shown in fig. 7, a communication device 500 includes:

a first communication module 501, configured to send a first message to a terminal, where the first message is used to instruct to activate a preconfigured SPS resource, and the SPS resource is used for the terminal to receive a downlink small data packet in an inactive state; the method is also used for receiving the first uplink transmission sent by the terminal;

And a first processing module 502 configured to determine a first SSB for use in downlink transmission on the SPS resource based on the first uplink transmission.

In an optional embodiment of the present invention, the first communication module 501 is further configured to receive a first PUSCH sent by the terminal based on CG resources, where the first PUSCH carries a first MAC CE; the first MAC CE includes at least index information of the first SSB.

In an alternative embodiment of the present invention, the first processing module 502 is further configured to determine the first SSB according to index information of the first SSB; or,

the first processing module 502 is further configured to determine the first SSB according to a beam used by the terminal to transmit the first PUSCH.

In an optional embodiment of the present invention, the first communication module 501 is further configured to send a second message to the terminal, where the second message is used to indicate the CG resource, and the CG resource is used for the terminal to send an uplink small data packet to the network device.

In an optional embodiment of the present invention, the first communication module 501 is further configured to receive a second PUSCH sent by the terminal, where the second PUSCH carries a second MAC CE; the second MAC CE includes at least index information of the first SSB; the second PUSCH is a PUSCH used for transmitting MsgA in a two-step random access process;

The first processing module 502 is further configured to determine the first SSB according to index information of the first SSB.

In an optional embodiment of the present invention, the second MAC CE further includes a first field, where a value of the first field is used to indicate whether MsgA of the second PUSCH transmission is only used to feed back the first message.

In an alternative embodiment of the present invention, the value of the first field includes a first value and a second value; the first communication module 501 is further configured to not send MsgB in the two-step random access procedure when the value of the first field is the first value; and under the condition that the value of the first field is a second value, sending MsgB in a two-step random access process to the terminal, wherein the MsgB comprises a downlink small data packet.

In an optional embodiment of the present invention, the first communication module 501 is further configured to receive a preamble of a random access procedure sent by the terminal;

the first processing module 502 is further configured to determine the first SSB corresponding to the preamble.

In an optional embodiment of the present invention, the first communication module 501 is further configured to send a downlink small data packet to the terminal in an inactive state based on the first SSB; and receiving a second uplink transmission sent by the terminal;

The first processing module 502 is further configured to update, based on the second uplink transmission, a first SSB used for downlink transmission on the SPS resource; and transmitting a downlink small data packet to the terminal in the inactive state based on the updated first SSB.

In an alternative embodiment of the present invention, the first communication module 501 is further configured to send a third message to the terminal, where the third message is used to indicate the SPS resource.

In an alternative embodiment of the present invention, the third message is further used to instruct the terminal to enter the inactive state.

In an alternative embodiment of the present invention, the third message includes at least one of the following: the periodicity, time frequency location, MCS and HARQ of the SPS resources.

In an alternative embodiment of the present invention, the first communication module 501 is further configured to send a fourth message to the terminal, where the fourth message is used to instruct triggering a random access procedure of the terminal;

the first processing module 502 is further configured to send a downlink small data packet to the terminal based on the random access procedure.

In the embodiment of the present invention, the first communication module 501 in the communication device 500 may be implemented in practical application through a communication module (including a basic communication suite, an operating system, a communication module, a standardized interface, a protocol, etc.) and a transceiver antenna; the first processing module 502 in the communication device 500 may be implemented by a central processing unit (CPU, central Processing Unit), a digital signal processor (DSP, digital Signal Processor), a micro control unit (MCU, microcontroller Unit) or a programmable gate array (FPGA, field-Programmable Gate Array) in the communication device 500 in practical applications.

It should be noted that: in the communication device provided in the above embodiment, only the division of each program module is used for illustration, and in practical application, the process allocation may be performed by different program modules according to needs, that is, the internal structure of the device is divided into different program modules, so as to complete all or part of the processes described above. In addition, the communication device provided in the foregoing embodiment belongs to the same concept as the foregoing embodiment of the communication method in which the execution body is a network device, and the specific implementation process is detailed in the foregoing embodiment of the method in which the execution body is a network device, which is not described herein again.

The embodiment of the invention also provides a communication device. Fig. 8 is a schematic diagram of a second embodiment of a communication device, as shown in fig. 8, a communication device 600 includes:

a second communication module 601, configured to receive a first message sent by a network device, where the first message is used to indicate to activate a preconfigured SPS resource, and the SPS resource is used for a terminal to receive a downlink small data packet in an inactive state; and the method is also used for sending a first uplink transmission to the network equipment, wherein the first uplink transmission is used for determining a first SSB used by the network equipment for downlink transmission on the SPS resource.

In an optional embodiment of the present invention, the second communication module 601 is further configured to send a first PUSCH to the network device based on CG resources, where the first PUSCH carries a first MAC CE; the first MAC CE includes at least index information of the first SSB.

In an optional embodiment of the present invention, the second communication module 601 is further configured to receive a second message sent by the network device, where the second message is used to indicate the CG resource, and the CG resource is used by the terminal to send an uplink small data packet to the network device.

In an optional embodiment of the present invention, the second communication module 601 is further configured to send a second PUSCH to the network device, where the second PUSCH carries a second MAC CE; the second MAC CE includes at least index information of the first SSB; the second PUSCH is a PUSCH used for transmitting MsgA in the two-step random access procedure.

In an alternative embodiment of the invention, the value of the first field comprises a first value and a second value; the apparatus 600 further comprises:

A second processing module 602, configured to determine, when MsgA of the second PUSCH transmission is only used for feeding back the first message, that the value of the first field is a first value; and determining that the value of the first field is a second value when the MsgA of the second PUSCH transmission is not used only for feeding back the first message.

In an alternative embodiment of the present invention, the second communication module 601 is further configured to send a preamble of a random access procedure to the network device.

In an optional embodiment of the present invention, the second communication module 601 is further configured to receive, on the SPS resource, a downlink small data packet sent by the network device based on the first SSB; and sending a second uplink transmission to the network device, the second uplink transmission being used by the network device to update the first SSB used for downlink transmission on the SPS resources;

the second communication module 601 is further configured to receive, on the SPS resource, a downlink small data packet sent by the network device based on the updated first SSB.

In an optional embodiment of the present invention, the second communication module 601 is further configured to receive, on the SPS resource, a downlink small data packet sent by the network device based on the first SSB within a preset time range after sending the first uplink transmission;

The second communication module 601 is further configured to receive, on the SPS resource, a downlink small data packet sent by the network device based on the updated first SSB within the preset time range after sending the second uplink transmission.

In an alternative embodiment of the present invention, the second communication module 601 is further configured to receive a third message sent by the network device, where the third message is used to indicate the SPS resource.

In an optional embodiment of the present invention, the second communication module 601 is further configured to receive a fourth message sent by the network device, where the fourth message is used to indicate triggering a random access procedure of the terminal; the second communication module 601 is further configured to receive a downlink small data packet sent by the network device based on the random access procedure.

In the embodiment of the present invention, the second communication module 601 in the communication device 600 may be implemented in practical application through a communication module (including a basic communication suite, an operating system, a communication module, a standardized interface, a protocol, etc.) and a transceiver antenna; the second processing module 602 in the communication device 600 may be implemented by CPU, DSP, MCU or FPGA in the communication device 600 in practical application.

It should be noted that: in the communication device provided in the above embodiment, only the division of each program module is used for illustration, and in practical application, the process allocation may be performed by different program modules according to needs, that is, the internal structure of the device is divided into different program modules, so as to complete all or part of the processes described above. In addition, the communication device provided in the foregoing embodiment belongs to the same concept as the foregoing embodiment of the communication method in which the execution subject is a terminal, and the specific implementation process is detailed in the foregoing embodiment of the method in which the execution subject is a terminal, which is not described herein again.

The embodiment of the invention also provides network equipment. Fig. 9 is a schematic hardware structure of a network device according to an embodiment of the present invention. The network device 700 shown in fig. 9 includes: at least one processor 701, memory 702, and at least one network interface 703. The various components in network device 700 are coupled together by bus system 704. It is appreciated that bus system 704 is used to enable connected communications between these components. The bus system 704 includes a power bus, a control bus, and a status signal bus in addition to the data bus. But for clarity of illustration, the various buses are labeled as bus system 704 in fig. 9.

The memory 702 may be implemented by any type of volatile or non-volatile storage device, or combination thereof. Wherein the nonvolatile Memory may be Read Only Memory (ROM), programmable Read Only Memory (PROM, programmable Read-Only Memory), erasable programmable Read Only Memory (EPROM, erasable Programmable Read-Only Memory), electrically erasable programmable Read Only Memory (EEPROM, electrically Erasable Programmable Read-Only Memory), magnetic random access Memory (FRAM, ferromagnetic Random Access Memory), flash Memory (Flash Memory), magnetic surface Memory, optical disk, or compact disk Read Only Memory (CD-ROM, compact Disc Read-Only Memory); the magnetic surface memory may be a disk memory or a tape memory. The volatile memory may be random access memory (RAM, random Access Memory), which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available, such as static random access memory (SRAM, static Random Access Memory), synchronous static random access memory (SSRAM, synchronous Static Random Access Memory), dynamic random access memory (DRAM, dynamic Random Access Memory), synchronous dynamic random access memory (SDRAM, synchronous Dynamic Random Access Memory), double data rate synchronous dynamic random access memory (ddr SDRAM, double Data Rate Synchronous Dynamic Random Access Memory), enhanced synchronous dynamic random access memory (ESDRAM, enhanced Synchronous Dynamic Random Access Memory), synchronous link dynamic random access memory (SLDRAM, syncLink Dynamic Random Access Memory), direct memory bus random access memory (DRRAM, direct Rambus Random Access Memory). The memory 702 described in embodiments of the present invention is intended to comprise, without being limited to, these and any other suitable types of memory.

The memory 702 in embodiments of the present invention is used to store various types of data to support the operation of the network device 700. Examples of such data include: any computer program for operating on the network device 700, such as a program for performing the method of the subject network device of the present invention.

The method of implementing the network device as the main body disclosed in the embodiment of the present invention may be applied to the processor 701 or implemented by the processor 701. The processor 701 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the method of implementing the network device as the main body may be implemented by integrated logic circuits of hardware in the processor 701 or instructions in software form. The processor 701 may be a general purpose processor, DSP, or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The processor 701 may implement or execute the disclosed execution bodies in the embodiments of the present invention as methods, steps and logic blocks of the network device. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method of using the execution body disclosed in the embodiment of the invention as the network device can be directly embodied as the execution completion of the hardware decoding processor or the combined execution completion of the hardware and software modules in the decoding processor. The software module may be located in a storage medium, where the storage medium is located in the memory 702, and the processor 701 reads information in the memory 702, and in combination with its hardware, performs the steps of the foregoing method where the execution body is a network device.

In an exemplary embodiment, the network device 700 may be implemented by one or more ASIC, DSP, PLD, CPLD, FPGA, general purpose processors, controllers, MCU, microprocessor, or other electronic elements for performing the foregoing method of performing a subject as a network device.

The embodiment of the invention also provides a terminal. Fig. 10 is a schematic hardware structure of a terminal according to an embodiment of the present invention, where the terminal 800 may be a mobile phone, a computer, a digital broadcast terminal, an information transceiver device, a game console, a tablet device, a medical device, a fitness device, a vehicle-mounted device, a wearable device, a personal digital assistant, etc. Referring to fig. 10, the terminal 800 may include one or more of the following components: a processing component 801, a memory 802, and a communication component 803.

Processing component 801 generally controls overall operation of terminal 800 such as operations associated with display, telephone calls, data communications, and information recording, among others. The processing component 801 may include one or more processors 804 to execute computer programs to perform all or part of the steps of the subject terminated communication methods described above. Further, the processing component 801 may include one or more modules that facilitate interactions between the processing component 801 and other components.

The memory 802 is used to store various types of data to support the operation of the terminal 800. Examples of such data include: any computer program for operating on the terminal 800, such as an operating system and application programs, etc. The operating system includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, for implementing various basic services and processing hardware-based tasks. The application programs may include various application programs such as a Media Player (Media Player), a Browser (Browser), etc. for implementing various application services. The program for implementing the method of which the execution subject is a terminal according to the embodiment of the present invention may be included in an application program. The detailed implementation of the memory 802 may refer to the detailed description of the memory 702 in the foregoing embodiment, and will not be repeated here.

The communication component 803 is used for communication between the terminal 800 and other devices in a wired or wireless manner. The terminal 800 may access a wireless network based on a communication standard, such as WiFi, 4G or 5G, or a combination thereof. In one exemplary embodiment, the communication component 803 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 803 further comprises a near field communication (NFC, near Field Communication) module to facilitate short range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID, radio Frequency IDentification) technology, infrared data organization (IrDA, infrared Data Association) technology, ultra WideBand (UWB) technology, blueTooth (BT) technology, or other technologies.

The method of using the execution subject as the terminal disclosed in the embodiment of the invention can be applied to the processor 804 or implemented by the processor 804. The processor 804 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the method of implementing the method of terminating the execution subject may be implemented by an integrated logic circuit of hardware in the processor 804 or an instruction in a software form. The processor 804 may be a general purpose processor, DSP, or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The processor 804 may implement or execute the methods, steps and logic blocks disclosed in the embodiments of the present invention, where the execution subject is a terminal. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method for taking the execution subject as the terminal disclosed by the embodiment of the invention can be directly embodied as the execution completion of the hardware decoding processor or the combined execution completion of the hardware and software modules in the decoding processor. The software modules may be located in a storage medium in the memory 802. The processor 804 reads the information in the memory 802, and in combination with its hardware, performs the steps of the method described above with the execution subject being a terminal.

In an exemplary embodiment, the terminal 800 can be implemented by one or more application specific integrated circuits (ASIC, application Specific Integrated Circuit), DSP, programmable logic device (PLD, programmable Logic Device), complex programmable logic device (CPLD, complex Programmable Logic Device), FPGA, general purpose processor, controller, MCU, microprocessor, or other electronic component for performing the aforementioned method of executing the subject terminating method.

In an exemplary embodiment, the present application also provides a computer-readable storage medium, such as a memory 702 or a memory 802, comprising a computer program executable by the processor 701 of the network device 700 or the processor 804 of the terminal 800 to perform the steps of the aforementioned method. The computer readable storage medium may be FRAM, ROM, PROM, EPROM, EEPROM, flash Memory, magnetic surface Memory, optical disk, or CD-ROM; but may be a variety of devices including one or any combination of the above-described memories, such as a mobile phone, computer, tablet device, personal digital assistant, or the like.

The methods disclosed in the method embodiments provided by the application can be arbitrarily combined under the condition of no conflict to obtain a new method embodiment.

The features disclosed in the several product embodiments provided by the application can be combined arbitrarily under the condition of no conflict to obtain new product embodiments.

The features disclosed in the embodiments of the method or the apparatus provided by the application can be arbitrarily combined without conflict to obtain new embodiments of the method or the apparatus.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above described device embodiments are only illustrative, e.g. the division of the units is only one logical function division, and there may be other divisions in practice, such as: multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. In addition, the various components shown or discussed may be coupled or directly coupled or communicatively coupled to each other via some interface, whether indirectly coupled or communicatively coupled to devices or units, whether electrically, mechanically, or otherwise.

The units described as separate units may or may not be physically separate, and units displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units; some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated in one processing unit, or each unit may be separately used as one unit, or two or more units may be integrated in one unit; the integrated units may be implemented in hardware or in hardware plus software functional units.

Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the above method embodiments may be implemented by hardware associated with program instructions, where the foregoing program may be stored in a computer readable storage medium, and when executed, the program performs steps including the above method embodiments; and the aforementioned storage medium includes: a removable storage device, ROM, RAM, magnetic or optical disk, or other medium capable of storing program code.

Alternatively, the above-described integrated units of the present invention may be stored in a computer-readable storage medium if implemented in the form of software functional modules and sold or used as separate products. Based on such understanding, the technical solutions of the embodiments of the present invention may be embodied in essence or a part contributing to the prior art in the form of a software product 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.) to execute all or part of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a removable storage device, ROM, RAM, magnetic or optical disk, or other medium capable of storing program code.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method of communication, the method comprising:

the network equipment sends a first message to the terminal, wherein the first message is used for indicating to activate a pre-configured semi-persistent scheduling (SPS) resource, and the SPS resource is used for receiving a downlink small data packet by the terminal in an inactive state;

the network device receives a first uplink transmission sent by the terminal, and determines a first synchronization signal/physical broadcast channel block SSB used for downlink transmission on the SPS resource based on the first uplink transmission.

2. The method of claim 1, wherein the network device receiving the first uplink transmission sent by the terminal comprises:

the network equipment receives a first Physical Uplink Shared Channel (PUSCH) sent by the terminal based on configuration authorization (CG) resources, wherein the first PUSCH carries a first Media Access Control (MAC) control unit (CE); the first MAC CE includes at least index information of the first SSB.

3. The method of claim 2, wherein the determining, based on the first uplink transmission, a first SSB for use in downlink transmissions on the SPS resources comprises:

the network equipment determines the first SSB according to the index information of the first SSB; or,

and the network equipment determines the first SSB according to the wave beam used by the terminal to send the first PUSCH.

4. The method according to claim 2, wherein the method further comprises:

the network device sends a second message to the terminal, wherein the second message is used for indicating the CG resource, and the CG resource is used for sending an uplink small data packet to the network device by the terminal.

5. The method of claim 1, wherein the network device receiving the first uplink transmission sent by the terminal, determining a first SSB for use in downlink transmission on the SPS resources based on the first uplink transmission, comprises:

the network equipment receives a second PUSCH sent by the terminal, wherein the second PUSCH carries a second MAC CE; the second MAC CE includes at least index information of the first SSB; the second PUSCH is a PUSCH used for transmitting MsgA in a two-step random access process;

The network device determines the first SSB according to the index information of the first SSB.

6. The method of claim 5, wherein the second MAC CE further comprises a first field, wherein a value of the first field is used to indicate whether MsgA of the second PUSCH transmission is used only for feeding back the first message.

7. The method of claim 6, wherein the value of the first field comprises a first value and a second value; the method further comprises the steps of:

under the condition that the value of the first field is a first value, the network equipment does not send MsgB in the two-step random access process;

and under the condition that the value of the first field is a second value, the network equipment sends MsgB in the two-step random access process to the terminal, wherein the MsgB comprises a downlink small data packet.

8. The method of claim 1, wherein the network device receiving the first uplink transmission sent by the terminal, determining a first SSB for use in downlink transmission on the SPS resources based on the first uplink transmission, comprises:

the network device receives a random access sequence preamble of a random access process sent by the terminal, and determines the first SSB corresponding to the preamble.

9. The method according to claim 1, wherein the method further comprises:

the network equipment sends a downlink small data packet to the terminal in an inactive state based on the first SSB; receiving a second uplink transmission sent by the terminal, and updating a first SSB used for downlink transmission on the SPS resource based on the second uplink transmission;

and the network equipment sends a downlink small data packet to the terminal in the inactive state based on the updated first SSB.

10. The method according to claim 1, wherein the method further comprises:

the network device sends a third message to the terminal, where the third message is used to indicate the SPS resource.

11. The method of claim 10, wherein the third message is further used to instruct the terminal to enter an inactive state.

12. The method of claim 10, wherein the third message comprises at least one of: the period, time-frequency position, modulation Coding Scheme (MCS) and hybrid automatic repeat request (HARQ) of the SPS resource.

13. The method according to claim 1, wherein the method further comprises:

The network equipment sends a fourth message to the terminal, wherein the fourth message is used for indicating to trigger the random access process of the terminal; and sending a downlink small data packet to the terminal based on the random access process.

14. A method of communication, the method comprising:

15. The method of claim 14, wherein the terminal sends a first uplink transmission to the network device, comprising:

the terminal sends a first PUSCH to the network equipment based on CG resources, wherein the first PUSCH carries a first MAC CE; the first MAC CE includes at least index information of the first SSB.

16. The method of claim 15, wherein the method further comprises:

the terminal receives a second message sent by the network device, wherein the second message is used for indicating the CG resource, and the CG resource is used for sending an uplink small data packet to the network device by the terminal.

17. The method of claim 14, wherein the terminal sends a first uplink transmission to the network device, comprising:

the terminal sends a second PUSCH to the network equipment, wherein the second PUSCH carries a second MAC CE; the second MAC CE includes at least index information of the first SSB; the second PUSCH is a PUSCH used for transmitting MsgA in the two-step random access procedure.

18. The method of claim 17, wherein the second MAC CE further comprises a first field, wherein a value of the first field is used to indicate whether MsgA of the second PUSCH transmission is used only for feeding back the first message.

19. The method of claim 18, wherein the value of the first field comprises a first value and a second value; the method further comprises the steps of:

determining that the value of the first field is a first value when the MsgA of the second PUSCH transmission is only used for feeding back the first message;

and determining that the value of the first field is a second value when the MsgA of the second PUSCH transmission is not only used for feeding back the first message.

20. The method of claim 14, wherein the terminal sends a first uplink transmission to the network device, comprising:

And the terminal sends a preamble of the random access process to the network equipment.

21. The method of claim 14, wherein the method further comprises:

the terminal receives a downlink small data packet sent by the network equipment based on the first SSB on the SPS resource; sending a second uplink transmission to the network device, the second uplink transmission being used by the network device to update a first SSB used for downlink transmission on the SPS resources;

and the terminal receives a downlink small data packet sent by the network equipment based on the updated first SSB on the SPS resource.

22. The method of claim 21, wherein the terminal receiving the downlink small data packet sent by the network device based on the first SSB on the SPS resource comprises:

in a preset time range after sending a first uplink transmission, the terminal receives a downlink small data packet sent by the network equipment based on the first SSB on the SPS resource;

the terminal receives a downlink small data packet sent by the network equipment based on the updated first SSB on the SPS resource, and the downlink small data packet comprises the following components:

and in the preset time range after the second uplink transmission is sent, the terminal receives the downlink small data packet sent by the network equipment based on the updated first SSB on the SPS resource.

23. The method of claim 14, wherein the method further comprises:

and the terminal receives a third message sent by the network equipment, wherein the third message is used for indicating the SPS resource.

24. The method of claim 23, wherein the third message is further used to instruct the terminal to enter an inactive state.

25. The method of claim 23, wherein the third message comprises at least one of: the periodicity, time frequency location, MCS and HARQ of the SPS resources.

26. The method of claim 14, wherein the method further comprises:

the terminal receives a fourth message sent by the network equipment, wherein the fourth message is used for indicating to trigger a random access process of the terminal; and receiving a downlink small data packet sent by the network equipment based on the random access process.

27. A communication device, the device comprising:

28. A communication device, the device comprising:

29. A network device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method of any of claims 1 to 13 when the program is executed.

30. A terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method of any of claims 14 to 26 when the program is executed.

31. A computer readable storage medium having stored thereon a computer program, characterized in that the program when executed by a processor realizes the steps of the method according to any of claims 1 to 13; alternatively, the program when executed by a processor implements the steps of the method of any of claims 14 to 26.