CN117082630A - Small data packet transmission method, device and computer readable storage medium - Google Patents
Small data packet transmission method, device and computer readable storage medium Download PDFInfo
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- CN117082630A CN117082630A CN202210482231.5A CN202210482231A CN117082630A CN 117082630 A CN117082630 A CN 117082630A CN 202210482231 A CN202210482231 A CN 202210482231A CN 117082630 A CN117082630 A CN 117082630A
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- 238000004590 computer program Methods 0.000 claims description 31
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- 230000000977 initiatory effect Effects 0.000 claims description 6
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
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Abstract
The embodiment of the application provides a small data packet transmission method, a small data packet transmission device and a computer readable storage medium, wherein the method comprises the following steps: a terminal with a fixed position sends a first message, wherein the first message carries first indication information; the first indication information is used for indicating that the terminal is required to save the uplink timing advance TA and the downlink wave beam which are used last time when entering the inactive state.
Description
Technical Field
The present application relates to the field of mobile communications technologies, and in particular, to a method and apparatus for transmitting small data packets, and a computer readable storage medium.
Background
In Rel-17, a small packet transfer (Small data transmission, SDT) technique, which is a technique for realizing small packet transfer in the rrc_inactive state, is introduced. The small data packet transmission scheme is mainly aimed at uplink transmission, and does not relate to the discussion of downlink transmission.
Currently, when the terminal is in rrc_inactive state, if the core network has downlink data arriving and needs to be sent, paging will be initiated by the core network or the RAN side. After receiving the paging request, the terminal resumes the RRC connection (enters the rrc_connected state) through the RRC connection resume procedure, and then performs downlink data transmission. For small packet transmissions, this can result in unnecessary power consumption and signaling overhead, and create significant delays.
Disclosure of Invention
In view of this, it is desirable to provide a method, an apparatus and a computer-readable storage medium for transmitting small data packets.
In order to achieve the above object, the technical solution of the embodiment of the present application is as follows:
the embodiment of the application provides a small data packet transmission method, which is applied to a fixed-position terminal and comprises the following steps:
sending a first message, wherein the first message carries first indication information; wherein,
the first indication information is used for indicating that the terminal is expected to save the uplink timing advance TA and the downlink wave beam which are used last time when entering the inactive state.
Optionally, after the first message is sent, the method further includes:
receiving a second message, wherein the second message is used for indicating the terminal to enter an inactive state; wherein the second message carries second indication information; the second indication information is used for indicating a downlink beam used by the terminal when the terminal enters an inactive state;
and storing the downlink wave beam and storing the last uplink TA.
Optionally, the method further comprises:
receiving a third message, wherein the third message is used for indicating the terminal to receive a downlink small data packet on a downlink semi-persistent scheduling (SPS) resource;
and receiving a downlink small data packet on the stored downlink SPS resource of the downlink beam by using the uplink TA.
Optionally, after the receiving the third message, the method further includes:
judging the stored Reference Signal Received Power (RSRP) value corresponding to the downlink beam based on a threshold value, and if the RSRP value is greater than or equal to the threshold value, using the downlink beam to receive downlink small data packets;
if the RSRP value is smaller than the threshold value, initiating a random access flow, reestablishing a beam pair with a base station, and updating the uplink TA; and receiving a downlink beam of the newly-built beam pair which is indicated by the second indication information and used in the inactive state by the base station.
The second indication information is further used for indicating physical uplink control channel PUCCH resources used by the terminal in an inactive state for feedback of a downlink hybrid automatic repeat request HARQ.
Optionally, after receiving the downlink small data packet, the method further includes:
and carrying out HARQ feedback on the transmission of the downlink small data packet by utilizing the PUCCH resource.
The embodiment of the application also provides a small data packet transmission method, which is applied to the base station and comprises the following steps:
receiving a first message, wherein the first message carries first indication information; wherein,
the first indication information is used for indicating that the terminal is expected to store the uplink timing advance TA and the downlink wave beam which are used last time when entering the inactive state; the position of the terminal is fixed.
Wherein after the receiving the first message, the method further comprises:
sending a second message, wherein the second message is used for indicating the terminal to enter an inactive state;
wherein the second message carries second indication information; the second indication information is used for indicating a downlink beam used by the terminal when the terminal enters an inactive state.
Optionally, the method further comprises:
and sending a third message, wherein the third message is used for indicating the terminal to receive the downlink small data packet on the downlink SPS resource.
Optionally, after the sending the second message, the method further includes:
and sending small data packets on the downlink SPS resources of the downlink beam.
Optionally, after the sending the third message, the method further includes:
responding to a random access request initiated by a terminal; the random access request is initiated when the terminal determines that the RSRP value corresponding to the downlink beam is smaller than a threshold value;
reestablishing a beam pair with the terminal through a random access process, and updating the uplink TA;
and the terminal is instructed to receive downlink small data packets by using the downlink beam in the newly established beam pair in the inactive state through the second instruction information.
The second indication information is further used for indicating a Physical Uplink Control Channel (PUCCH) resource for downlink hybrid automatic repeat request (HARQ) feedback, which is used by the terminal in an inactive state; correspondingly, the method further comprises the steps of:
and receiving HARQ feedback carried out on the transmission of the downlink small data packet by the terminal by utilizing the PUCCH resource.
The embodiment of the application also provides a small data packet transmission device, which is applied to the fixed-position terminal and comprises the following components:
the first transceiver module is used for sending a first message, and the first message carries first indication information; wherein,
the first indication information is used for indicating that the terminal is expected to save the uplink timing advance TA and the downlink wave beam which are used last time when entering the inactive state.
The embodiment of the application also provides a small data packet transmission device, which is applied to the base station and comprises:
the second transceiver module is used for receiving a first message, and the first message carries first indication information; wherein,
the first indication information is used for indicating that the terminal is expected to store the uplink timing advance TA and the downlink wave beam which are used last time when entering the inactive state; the position of the terminal is fixed.
The embodiment of the application also provides a small data packet transmission device, which comprises: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor is configured to execute the steps of the above method when running the computer program.
The embodiment of the application also provides a computer readable storage medium, on which a computer program is stored, which when being executed by a processor, implements the steps of the above method.
The small data packet transmission method, the small data packet transmission device and the computer readable storage medium provided by the embodiment of the application, wherein the fixed-position terminal sends a first message, and the first message carries first indication information; the first indication information is used for indicating that the terminal is required to save the uplink timing advance TA and the downlink wave beam which are used last time when entering the inactive state. In the embodiment of the application, the terminal with fixed position can transmit the small data packet on the downlink SPS resource through the uplink timing advance TA and the downlink wave beam which are used last time, and the wave beam pair is not required to be frequently established through the random access process, so that the wireless resource is saved, the processing complexity is reduced, and the downlink small data packet transmission of the non-activated terminal is realized.
Drawings
Fig. 1 is a schematic flow chart of a small data packet transmission method according to an embodiment of the application;
fig. 2 is a schematic diagram of a small data packet transmission method according to a second embodiment of the present application;
fig. 3 is a schematic diagram of a small data packet transmission device according to an embodiment of the present application;
fig. 4 is a schematic diagram of a small data packet transmission device according to a second embodiment of the present application;
fig. 5 is a flow chart of downlink small packet processing in an INACTIVE state of the terminal according to an embodiment of the present application.
Detailed Description
The application is described below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the present application are shown in the drawings. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
In Rel-18, downlink small packet transfer (SDT) triggered by Paging will be supported, the contents of which include small packet transfer trigger mechanism of rrc_inactive state terminal, and SDT mechanism similar to uplink random access SDT and Configured grant, with the goal of reducing signaling overhead and terminal power consumption by not switching to rrc_connected state, and reducing delay by allowing fast transfer of (small and infrequent) packets.
If the network pre-configures the rrc_inactive state terminal with downlink SPS resources, the network may notify the rrc_inactive state terminal to receive downlink small data packets on the downlink SPS resources through a Paging message when a specific condition is met (e.g., when the amount of data is below a specific threshold). However, since the INACTIVE state terminal does not establish the initial beam pair, the network does not know which beam should be used to transmit downlink data to the terminal on the downlink SPS timing. If the downlink SPS data is transmitted using beam scanning, multiple SPS occlusions are required, and each SPS ocction corresponds to a different beam (i.e., is associated with a different SSB, respectively), which not only results in more radio resources being occupied, but also results in higher processing complexity. In view of this, it is possible,
the embodiment of the application provides a small data packet transmission method, as shown in fig. 1, which is applied to a fixed-position terminal and comprises the following steps:
step 101: sending a first message, wherein the first message carries first indication information; wherein,
the first indication information is used for indicating that the terminal is expected to save the uplink timing advance TA and the downlink wave beam which are used last time when entering the inactive state.
In the embodiment of the present application, the fixed-position terminal is: the location is typically a fixed or very small change terminal relative to the base station, for example: smart meter or terminals for environmental monitoring, etc. The best downlink beam and uplink timing advance TA (Timing Advance) for such terminals is also typically unchanged. Therefore, the INACTIVE active state terminal may save the last used downlink beam and TA and use the downlink beam and TA for small data packet (i.e., packet) transmission on the downlink SPS resources.
In actual application, as shown in fig. 5, the fixed-location terminal may report information similar to the INACTIVE state reference through a ueassistance information message (first message), which indicates whether the terminal desires to save the n_ta and SSB index (i.e., downlink beam) used last time when entering the rrc_inactive state.
In an embodiment of the present application, after the first message is sent, the method further includes:
receiving a second message, wherein the second message is used for indicating the terminal to enter an inactive state; wherein the second message carries second indication information; the second indication information is used for indicating a downlink beam used by the terminal when the terminal enters an inactive state;
and storing the downlink wave beam and storing the last uplink TA.
Here, as shown in fig. 5, if the terminal reports the INACTIVE state reference information, when the gcb lets the terminal enter the INACTIVE state through the RRCRelease message (second message), the SSB index (i.e., downlink beam) used in the rrc_inactive state may be configured for the terminal. After receiving the RRCRelease message, the terminal will save the SSB index value and the last n_ta value, and consider that the uplink is synchronous.
In one embodiment of the present application, the method further comprises:
receiving a third message, wherein the third message is used for indicating the terminal to receive a downlink small data packet on a downlink semi-persistent scheduling (SPS) resource;
and receiving a downlink small data packet on the stored downlink SPS resource of the downlink beam by using the uplink TA.
In the embodiment of the application, if the network hopes that the terminal in the INACTIVE state uses the pre-configured downlink semi-persistent scheduling (SPS) resource to receive the small data packet, the network pre-configures the downlink SPS resource in the RRCRelease message when the terminal enters the rrc_inactive state. The downlink SPS resource specifies information such as period, time-frequency location, MCS, HARQ, etc. The downlink SPS resources are deactivated by default and in the deactivated state, the terminal does not attempt to receive downlink data on the downlink SPS resources. Only after receiving an "active" indication (i.e., paging message) from the network will the terminal receive downlink data on the downlink SPS resources.
When the Paging message (third message) received by the INACTIVE state terminal indicates that the terminal receives the downlink small data packet on the downlink SPS resource, the terminal uses the downlink beam corresponding to the stored SSB index to receive the downlink small data packet on the downlink SPS resource.
In one embodiment of the present application, after the receiving the third message, the method further includes:
judging the stored Reference Signal Received Power (RSRP) value corresponding to the downlink beam based on a threshold value, and if the RSRP value is greater than or equal to the threshold value, using the downlink beam to receive downlink small data packets;
if the RSRP value is smaller than the threshold value, initiating a random access flow, reestablishing a beam pair with a base station, and updating the uplink TA; and receiving a downlink beam of the newly-built beam pair which is indicated by the second indication information and used in the inactive state by the base station.
Here, although the location of the terminal is stationary, the stored downstream beam (SSB index) may fail for some reasons, such as occlusion by an obstacle. To address this problem, when the Paging message received by the INACTIVE state terminal instructs the terminal to receive a downlink small data packet on the downlink SPS resource,
if the terminal finds that the RSRP corresponding to the stored SSB index is equal to or higher than a specific threshold, the terminal continues to use the beam corresponding to the stored SSB index to receive downlink SPS transmission;
if the terminal finds that the RSRP corresponding to the stored SSB index is lower than a specific threshold, the terminal initiates random access, reestablishes beam pairs and uplink synchronization, and updates an N_TA value. After the random access is completed, if the base station wants the terminal to continue to enter rrc_inactive state, a new SSB index (i.e., downlink beam) used in rrc_inactive state is configured to the terminal in an RRCRelease message.
In an embodiment of the present application, the second indication information is further used to indicate a physical uplink control channel PUCCH resource used by the terminal in the inactive state for feedback of the downlink hybrid automatic repeat request HARQ.
In one embodiment of the present application, after receiving the downlink small data packet, the method further includes:
and carrying out HARQ feedback on the transmission of the downlink small data packet by utilizing the PUCCH resource.
Here, when the gcb makes the terminal enter the INACTIVE state through the RRCRelease message, the terminal may be configured with PUCCH resources for downlink HARQ feedback used in the rrc_inactive state, as shown in fig. 5, so that the terminal performs HARQ feedback on downlink small data packet transmission on the SPS resources.
In one embodiment of the present application, if the terminal does not report the INACTIVE state reference information, the gcb will not configure the SSB index (i.e. downlink beam) used in the rrc_inactive state for the terminal when the terminal enters the INACTIVE state through the RRCRelease message. In this case, when receiving a Paging message indicating that a downlink small packet is received on a downlink SPS resource, the INACTIVE terminal needs to establish an initial beam pair first, and then perform downlink SPS transmission.
The embodiment of the application also provides a small data packet transmission method, as shown in fig. 2, which is applied to a base station and comprises the following steps:
step 201: receiving a first message, wherein the first message carries first indication information; wherein,
the first indication information is used for indicating that the terminal is expected to store the uplink timing advance TA and the downlink wave beam which are used last time when entering the inactive state; the position of the terminal is fixed.
In one embodiment of the present application, after the receiving the first message, the method further includes:
sending a second message, wherein the second message is used for indicating the terminal to enter an inactive state;
wherein the second message carries second indication information; the second indication information is used for indicating a downlink beam used by the terminal when the terminal enters an inactive state.
In one embodiment of the present application, the method further comprises:
and sending a third message, wherein the third message is used for indicating the terminal to receive the downlink small data packet on the downlink SPS resource.
In one embodiment of the present application, after the sending the second message, the method further includes:
and sending small data packets on the downlink SPS resources of the downlink beam.
In one embodiment of the present application, after the sending the third message, the method further includes:
responding to a random access request initiated by a terminal; the random access request is initiated when the terminal determines that the RSRP value corresponding to the downlink beam is smaller than a threshold value;
reestablishing a beam pair with the terminal through a random access process, and updating the uplink TA;
and the terminal is instructed to receive downlink small data packets by using the downlink beam in the newly established beam pair in the inactive state through the second instruction information.
In an embodiment of the present application, the second indication information is further used to indicate a PUCCH resource for downlink HARQ feedback used by the terminal in an inactive state; correspondingly, the method further comprises the steps of:
and receiving HARQ feedback carried out on the transmission of the downlink small data packet by the terminal by utilizing the PUCCH resource.
In order to implement the above method embodiment, the embodiment of the present application further provides a small data packet transmission device, as shown in fig. 3, where the device is applied to a fixed-position terminal, and includes:
a first transceiver module 301, configured to send a first message, where the first message carries first indication information; wherein,
the first indication information is used for indicating that the terminal is expected to save the uplink timing advance TA and the downlink wave beam which are used last time when entering the inactive state.
In the embodiment of the present application, after the first transceiver module 301 sends the first message, the first transceiver module is further configured to
Receiving a second message, wherein the second message is used for indicating the terminal to enter an inactive state; wherein the second message carries second indication information; the second indication information is used for indicating a downlink beam used by the terminal when the terminal enters an inactive state;
and storing the downlink wave beam and storing the last uplink TA.
In one embodiment of the present application, the first transceiver module 301 is further configured to
Receiving a third message, wherein the third message is used for indicating the terminal to receive a downlink small data packet on a downlink semi-persistent scheduling (SPS) resource;
and receiving a downlink small data packet on the stored downlink SPS resource of the downlink beam by using the uplink TA.
In one embodiment of the present application, after the first transceiver module 301 receives the third message, the first transceiver module is further configured to
Judging the stored Reference Signal Received Power (RSRP) value corresponding to the downlink beam based on a threshold value, and if the RSRP value is greater than or equal to the threshold value, using the downlink beam to receive downlink small data packets;
if the RSRP value is smaller than the threshold value, initiating a random access flow, reestablishing a beam pair with a base station, and updating the uplink TA; and receiving a downlink beam of the newly-built beam pair which is indicated by the second indication information and used in the inactive state by the base station.
In an embodiment of the present application, the second indication information is further used to indicate a physical uplink control channel PUCCH resource used by the terminal in the inactive state for feedback of the downlink hybrid automatic repeat request HARQ.
In one embodiment of the present application, after the first transceiver module 301 receives the downlink small data packet, the first transceiver module is further configured to
And carrying out HARQ feedback on the transmission of the downlink small data packet by utilizing the PUCCH resource.
The embodiment of the application also provides a small data packet transmission device, as shown in fig. 4, which is applied to a base station and comprises:
a second transceiver module 401, configured to receive a first message, where the first message carries first indication information; wherein,
the first indication information is used for indicating that the terminal is expected to store the uplink timing advance TA and the downlink wave beam which are used last time when entering the inactive state; the position of the terminal is fixed.
In one embodiment of the present application, after the second transceiver module 401 receives the first message, it is further configured to send a second message, where the second message is used to instruct the terminal to enter an inactive state;
wherein the second message carries second indication information; the second indication information is used for indicating a downlink beam used by the terminal when the terminal enters an inactive state.
In one embodiment of the present application, the second transceiver module 401 is further configured to
And sending a third message, wherein the third message is used for indicating the terminal to receive the downlink small data packet on the downlink SPS resource.
In one embodiment of the present application, after the second transceiver module 401 sends the second message, the second transceiver module is further configured to send a small data packet on the downlink SPS resource of the downlink beam.
In one embodiment of the present application, after the second transceiver module 401 sends the third message, the second transceiver module is further configured to
Responding to a random access request initiated by a terminal; the random access request is initiated when the terminal determines that the RSRP value corresponding to the downlink beam is smaller than a threshold value;
reestablishing a beam pair with the terminal through a random access process, and updating the uplink TA;
and the terminal is instructed to receive downlink small data packets by using the downlink beam in the newly established beam pair in the inactive state through the second instruction information.
In an embodiment of the present application, the second indication information is further used to indicate a PUCCH resource for downlink HARQ feedback used by the terminal in an inactive state; correspondingly, the second transceiver module 401 is further configured to
And receiving HARQ feedback carried out on the transmission of the downlink small data packet by the terminal by utilizing the PUCCH resource.
The embodiment of the application also provides a small data packet transmission device, which comprises: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor, when executing the computer program, performs:
sending a first message, wherein the first message carries first indication information; wherein,
the first indication information is used for indicating that the terminal is expected to save the uplink timing advance TA and the downlink wave beam which are used last time when entering the inactive state.
After said sending the first message, said processor is further configured to, when executing said computer program, perform:
receiving a second message, wherein the second message is used for indicating the terminal to enter an inactive state; wherein the second message carries second indication information; the second indication information is used for indicating a downlink beam used by the terminal when the terminal enters an inactive state;
and storing the downlink wave beam and storing the last uplink TA.
The processor is further configured to execute, when the computer program is executed:
receiving a third message, wherein the third message is used for indicating the terminal to receive a downlink small data packet on a downlink semi-persistent scheduling (SPS) resource;
and receiving a downlink small data packet on the stored downlink SPS resource of the downlink beam by using the uplink TA.
After the receiving the third message, the processor is further configured to, when executing the computer program, perform:
judging the stored Reference Signal Received Power (RSRP) value corresponding to the downlink beam based on a threshold value, and if the RSRP value is greater than or equal to the threshold value, using the downlink beam to receive downlink small data packets;
if the RSRP value is smaller than the threshold value, initiating a random access flow, reestablishing a beam pair with a base station, and updating the uplink TA; and receiving a downlink beam of the newly-built beam pair which is indicated by the second indication information and used in the inactive state by the base station.
The second indication information is further used for indicating physical uplink control channel PUCCH resources used by the terminal in an inactive state for feedback of a downlink hybrid automatic repeat request HARQ.
After receiving the downstream small data packet, the processor is further configured to execute, when executing the computer program:
and carrying out HARQ feedback on the transmission of the downlink small data packet by utilizing the PUCCH resource.
The embodiment of the application also provides a small data packet transmission device, which comprises: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor, when executing the computer program, performs:
receiving a first message, wherein the first message carries first indication information; wherein,
the first indication information is used for indicating that the terminal is expected to store the uplink timing advance TA and the downlink wave beam which are used last time when entering the inactive state; the position of the terminal is fixed.
After said receiving the first message, said processor is further configured to, when executing said computer program, perform:
sending a second message, wherein the second message is used for indicating the terminal to enter an inactive state;
wherein the second message carries second indication information; the second indication information is used for indicating a downlink beam used by the terminal when the terminal enters an inactive state.
The processor is further configured to execute, when the computer program is executed:
and sending a third message, wherein the third message is used for indicating the terminal to receive the downlink small data packet on the downlink SPS resource.
After said sending the second message, said processor is further configured to, when executing said computer program, perform:
and sending small data packets on the downlink SPS resources of the downlink beam.
After said sending the third message, said processor is further configured to, when executing said computer program, perform:
responding to a random access request initiated by a terminal; the random access request is initiated when the terminal determines that the RSRP value corresponding to the downlink beam is smaller than a threshold value;
reestablishing a beam pair with the terminal through a random access process, and updating the uplink TA;
and the terminal is instructed to receive downlink small data packets by using the downlink beam in the newly established beam pair in the inactive state through the second instruction information.
The second indication information is further used for indicating a Physical Uplink Control Channel (PUCCH) resource for downlink hybrid automatic repeat request (HARQ) feedback, which is used by the terminal in an inactive state; accordingly, the processor is further configured to execute, when the computer program is executed:
and receiving HARQ feedback carried out on the transmission of the downlink small data packet by the terminal by utilizing the PUCCH resource.
It should be noted that: in the apparatus provided in the above embodiment, only the division of each program module is used for illustration when transmitting small data packets, and in practical application, the processing 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 processing described above. In addition, the apparatus provided in the foregoing embodiments and the corresponding method embodiments belong to the same concept, and specific implementation processes of the apparatus and the corresponding method embodiments are detailed in the method embodiments, which are not described herein again.
In an exemplary embodiment, the present application further provides a computer readable storage medium, which 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 embodiment of the present application also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs:
sending a first message, wherein the first message carries first indication information; wherein,
the first indication information is used for indicating that the terminal is expected to save the uplink timing advance TA and the downlink wave beam which are used last time when entering the inactive state.
After said sending the first message, the computer program, when executed by the processor, further performs:
receiving a second message, wherein the second message is used for indicating the terminal to enter an inactive state; wherein the second message carries second indication information; the second indication information is used for indicating a downlink beam used by the terminal when the terminal enters an inactive state;
and storing the downlink wave beam and storing the last uplink TA.
The computer program, when executed by the processor, further performs:
receiving a third message, wherein the third message is used for indicating the terminal to receive a downlink small data packet on a downlink semi-persistent scheduling (SPS) resource;
and receiving a downlink small data packet on the stored downlink SPS resource of the downlink beam by using the uplink TA.
After said receiving the third message, the computer program, when executed by the processor, further performs:
judging the stored Reference Signal Received Power (RSRP) value corresponding to the downlink beam based on a threshold value, and if the RSRP value is greater than or equal to the threshold value, using the downlink beam to receive downlink small data packets;
if the RSRP value is smaller than the threshold value, initiating a random access flow, reestablishing a beam pair with a base station, and updating the uplink TA; and receiving a downlink beam of the newly-built beam pair which is indicated by the second indication information and used in the inactive state by the base station.
The second indication information is further used for indicating physical uplink control channel PUCCH resources used by the terminal in an inactive state for feedback of a downlink hybrid automatic repeat request HARQ.
After receiving the downstream small data packet, the computer program, when executed by the processor, further performs:
and carrying out HARQ feedback on the transmission of the downlink small data packet by utilizing the PUCCH resource.
The embodiment of the present application also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs:
receiving a first message, wherein the first message carries first indication information; wherein,
the first indication information is used for indicating that the terminal is expected to store the uplink timing advance TA and the downlink wave beam which are used last time when entering the inactive state; the position of the terminal is fixed.
After said receiving the first message, the computer program, when executed by the processor, further performs:
sending a second message, wherein the second message is used for indicating the terminal to enter an inactive state;
wherein the second message carries second indication information; the second indication information is used for indicating a downlink beam used by the terminal when the terminal enters an inactive state.
The computer program, when executed by the processor, further performs:
and sending a third message, wherein the third message is used for indicating the terminal to receive the downlink small data packet on the downlink SPS resource.
After said sending the second message, the computer program, when executed by the processor, further performs:
and sending small data packets on the downlink SPS resources of the downlink beam.
After said sending the third message, the computer program, when executed by the processor, further performs:
responding to a random access request initiated by a terminal; the random access request is initiated when the terminal determines that the RSRP value corresponding to the downlink beam is smaller than a threshold value;
reestablishing a beam pair with the terminal through a random access process, and updating the uplink TA;
and the terminal is instructed to receive downlink small data packets by using the downlink beam in the newly established beam pair in the inactive state through the second instruction information.
The second indication information is further used for indicating a Physical Uplink Control Channel (PUCCH) resource for downlink hybrid automatic repeat request (HARQ) feedback, which is used by the terminal in an inactive state; accordingly, the computer program, when executed by the processor, further performs:
and receiving HARQ feedback carried out on the transmission of the downlink small data packet by the terminal by utilizing the PUCCH resource.
In the embodiment of the application, the terminal with fixed position can transmit the small data packet on the downlink SPS resource through the uplink timing advance TA and the downlink wave beam which are used last time, and the wave beam pair is not required to be frequently established through the random access process, so that the wireless resource is saved, the processing complexity is reduced, and the downlink small data packet transmission of the non-activated terminal is realized.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the present application.
Claims (16)
1. The small data packet transmission method is characterized in that the method is applied to a fixed-position terminal and comprises the following steps:
sending a first message, wherein the first message carries first indication information; wherein,
the first indication information is used for indicating that the terminal is expected to save the uplink timing advance TA and the downlink wave beam which are used last time when entering the inactive state.
2. The method of claim 1, wherein after the sending the first message, the method further comprises:
receiving a second message, wherein the second message is used for indicating the terminal to enter an inactive state; wherein the second message carries second indication information; the second indication information is used for indicating a downlink beam used by the terminal when the terminal enters an inactive state;
and storing the downlink wave beam and storing the last uplink TA.
3. The method according to claim 2, characterized in that the method further comprises:
receiving a third message, wherein the third message is used for indicating the terminal to receive a downlink small data packet on a downlink semi-persistent scheduling (SPS) resource;
and receiving a downlink small data packet on the stored downlink SPS resource of the downlink beam by using the uplink TA.
4. A method according to claim 3, wherein after receiving the third message, the method further comprises:
judging the stored Reference Signal Received Power (RSRP) value corresponding to the downlink beam based on a threshold value, and if the RSRP value is greater than or equal to the threshold value, using the downlink beam to receive downlink small data packets;
if the RSRP value is smaller than the threshold value, initiating a random access flow, reestablishing a beam pair with a base station, and updating the uplink TA; and receiving a downlink beam of the newly-built beam pair which is indicated by the second indication information and used in the inactive state by the base station.
5. The method according to claim 2, characterized in that the second indication information is further used for indicating physical uplink control channel PUCCH resources for downlink hybrid automatic repeat request HARQ feedback used by the terminal in an inactive state.
6. The method of claim 5, wherein after receiving the downstream small data packet, the method further comprises:
and carrying out HARQ feedback on the transmission of the downlink small data packet by utilizing the PUCCH resource.
7. The small data packet transmission method is characterized in that the method is applied to a base station and comprises the following steps:
receiving a first message, wherein the first message carries first indication information; wherein,
the first indication information is used for indicating that the terminal is expected to store the uplink timing advance TA and the downlink wave beam which are used last time when entering the inactive state; the position of the terminal is fixed.
8. The method of claim 7, wherein after receiving the first message, the method further comprises:
sending a second message, wherein the second message is used for indicating the terminal to enter an inactive state;
wherein the second message carries second indication information; the second indication information is used for indicating a downlink beam used by the terminal when the terminal enters an inactive state.
9. The method of claim 8, wherein the method further comprises:
and sending a third message, wherein the third message is used for indicating the terminal to receive the downlink small data packet on the downlink SPS resource.
10. The method according to claim 8 or 9, wherein after the sending the second message, the method further comprises:
and sending small data packets on the downlink SPS resources of the downlink beam.
11. The method of claim 9, wherein after the sending the third message, the method further comprises:
responding to a random access request initiated by a terminal; the random access request is initiated when the terminal determines that the RSRP value corresponding to the downlink beam is smaller than a threshold value;
reestablishing a beam pair with the terminal through a random access process, and updating the uplink TA;
and the terminal is instructed to receive downlink small data packets by using the downlink beam in the newly established beam pair in the inactive state through the second instruction information.
12. The method of claim 8, wherein the second indication information is further used to indicate PUCCH resources for downlink HARQ feedback used by the terminal in an inactive state; correspondingly, the method further comprises the steps of:
and receiving HARQ feedback carried out on the transmission of the downlink small data packet by the terminal by utilizing the PUCCH resource.
13. A small data packet transmission device, the device being applied to a fixed-location terminal, comprising:
the first transceiver module is used for sending a first message, and the first message carries first indication information; wherein,
the first indication information is used for indicating that the terminal is expected to save the uplink timing advance TA and the downlink wave beam which are used last time when entering the inactive state.
14. A small data packet transmission device, the device being applied to a base station, comprising:
the second transceiver module is used for receiving a first message, and the first message carries first indication information; wherein,
the first indication information is used for indicating that the terminal is expected to store the uplink timing advance TA and the downlink wave beam which are used last time when entering the inactive state; the position of the terminal is fixed.
15. A small data packet transmission device, the device comprising: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor is adapted to perform the steps of the method of any of claims 1-6 or the steps of the method of any of claims 7-12 when the computer program is run.
16. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1-6 or the steps of the method of any of claims 7-12.
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| CN202210482231.5A CN117082630A (en) | 2022-05-05 | 2022-05-05 | Small data packet transmission method, device and computer readable storage medium |
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