CN115580382A - Method, base station and communication system for improving data transmission performance - Google Patents
Method, base station and communication system for improving data transmission performance Download PDFInfo
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- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0096—Indication of changes in allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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Abstract
The present disclosure provides a method, a base station and a communication system for improving data transmission performance. The method for improving the data transmission performance comprises the following steps: in the inactive state, determining a corresponding inactive state data transmission type according to SDT resource configuration information sent by a base station; carrying out inactive state data transmission according to the inactive state data transmission type; if the SDT recording function indication message sent by the base station indicates that the user terminal enables recording of the transmission process of the non-activated state data, recording the transmission failure times of the non-activated state data and the terminal configuration information according to the SDT recording configuration information sent by the base station; if the failure times reach a preset threshold, switching the current state from the inactive state to the connected state; and performing data transmission after entering a connected state, and sending the SDT record information to the base station through an RRC message so that the base station optimizes the inactive state data transmission configuration of the user terminal.
Description
Technical Field
The present disclosure relates to the field of wireless communications, and in particular, to a method, a base station, and a communication system for improving data transmission performance.
Background
The 5G is used as a main technology of a next generation wireless network and has the technical characteristics of supporting ultra wide band, large connection and the like. In order to enable a UE (User Equipment, user terminal) to quickly enter a connected state to transmit data and reduce signaling overhead caused by a mobility procedure and a state transition procedure, a New RRC (Radio Resource Control ) state, namely, RRC _ INACTIVE state, is introduced into an NR (New Radio interface).
In the RRC inactive state, the NAS (Non Access Stratum) of the UE remains in the connected state, but an air interface connection corresponding to the AS (Access Stratum) of the UE is temporarily suspended. Similar to the idle state, the UE in the RRC inactive state can move within an RNA (RAN Notification Area) configured on the network side. Because the UE side and the RAN (Radio Access Network) side both store the AS layer context in the inactive state of the UE, the inactive UE can perform related operations based on the previous AS layer context in the inactive state of the UE in the process of resuming the connection with the air interface of the RAN side, thereby reducing signaling interaction and enabling the UE to rapidly enter the connected state. Namely, signaling overhead can be reduced by introducing the RRC _ INACTIVE state, fast access is realized, and time delay and power consumption are reduced.
NR supports RRC _ INACTIVE state, and the network configures the UE with infrequent (with periodic and/or aperiodic) data transmissions to RRC _ INACTIVE state. Before Rel-16, the RRC _ INACTIVE state does not support data transmission. Therefore, when there is downlink data and uplink data to be transmitted, the inactive UE needs to first return to the RRC _ CONNECTED state. When data packets are small and infrequent (for example, industrial internet of things applications (such as sensor upgrade) and WeChat of smart phones), the process of switching to the inactive state after the UE enters the connected state may cause unnecessary power consumption and signaling overhead. Therefore, in order to improve network performance and efficiency, 3GPP (3 rd Generation Partnership Project) starts to study Small Data Transmission (SDT) in an inactive state at stages R15 and R16, including 2-step RACH (Random Access Channel), 4-step RACH and CG (configuration granted) type-1 methods.
In addition, in order to support high-reliability and low-delay services, the NR system proposes a CG scheduling method of type 1, which aims to further reduce the time delay of physical layer activation and deactivation, thereby reducing the service transmission time delay. The CG scheduling mode of type 1 refers to that the RRC directly configures uplink grant scheduling resources, and the UE does not need to activate or deactivate through a Physical Downlink Common Control Channel (PDCCCH) of a Physical layer when transmitting. After the uplink configuration authorization channel is successfully transmitted, the gNB (Generation NodeB, next Generation base station) does not need to schedule and transmit new data through the PDCCCH, and meanwhile, the NR system does not have a downlink feedback channel, and the UE cannot know whether new data transmission is needed. To solve this problem, NR system uplink configuration Grant scheduling introduces a Timer (Configured Grant Timer) to control new transmission/retransmission. Specifically, if the UE receives retransmission scheduling of the gNB before the timer expires, the UE performs retransmission of a MAC (Media Access Control) PDU (Protocol Data Unit), otherwise, the UE allocates a HARQ (Hybrid Automatic Repeat Request) process to new transmission of another MAC PDU.
Similarly, in LTE (Long Term Evolution), dedicated pre-configured Uplink Resource (PUR) transmission is studied. In the PUR transmission, the UE in RRC _ IDLE state is allowed to perform UL transmission once using the pre-configured uplink resource without performing a random access procedure. For example, a UE in RRC _ CONNECTED state requests a PUR by transmitting a PURConfigurationRequest to an eNB (evolved NodeB). When the eNB decides to provide the UE with the PUR resource, the detailed information of the PUR configuration is contained in RRCConnectionRelease and is sent to the UE, and the resource is configured specifically for the UE and is effective in a cell configured with the resource. In addition to this, when the UE decides to start the PUR transmission, a condition such as TA (Timing Advance) needs to be satisfied.
In the SDT process, when a configuration grant SDT resource is configured on an UL (Uplink) carrier and the resource is valid, the configuration grant resource is used to transmit data. Otherwise, judging whether the UL carrier is configured with the 2-step RACH small data transmission resource, if so, selecting the 2-step RACH resource to transmit data. If not, judging whether 4-step RACH small data transmission resources are configured on the UL carrier, if so, selecting the 4-step RACH resources to transmit data, otherwise, executing a non-small data transmission process, namely, recovering to an RRC _ CONNECTED state through an RRC recovery (Resume) message to perform data transmission.
Disclosure of Invention
The inventor has noted that, during the inactive data transmission process, when the configuration grant data transmission or the random access data transmission fails due to the channel state or other reasons, it is necessary to fall back to the conventional data transmission process, i.e. to return to the RRC connected state for data transmission. The process introduces a large time delay and a high power consumption, and in order to further improve the data transmission performance in the inactive state, the following problems exist in the current standard and implementation:
lack of a more efficient inactive data transfer mechanism: at present, there is no optimization mechanism for the failure of data transmission in the inactive state, and when the data transmission in the inactive state fails, the terminal needs to recover to the connected state for data transmission, which may increase the time delay and signaling overhead of data transmission.
Failure to record the inactive data transmission: at present, related configuration information is lack of recording for an inactive state data transmission state in an RRC message, and when the inactive state data transmission fails, a terminal cannot record the number of data transmission failures and the related configuration information according to the related configuration information, so that the process cannot be optimized.
Failure to optimize the inactive data transmission performance: at present, in RRC signaling, reporting information related to transmission failure of inactive state data is lacked, and a network cannot acquire specific conditions of transmission failure of inactive state data from a terminal side, so that the transmission process of inactive state data cannot be optimized.
Based on the above requirements and reason analysis, the current 3GPP protocol cannot meet the requirements, and a new manner is needed to enhance the inactive data transmission process, so as to meet the requirements of the network on time delay and power consumption.
Therefore, the scheme for improving the data transmission performance can effectively reduce the probability of the failure of the data transmission in the inactive state.
According to a first aspect of the embodiments of the present disclosure, there is provided a method for improving data transmission performance, the method being performed by a user terminal, and including: in the non-activated state, determining a corresponding non-activated state data transmission type according to SDT resource configuration information sent by a base station; carrying out inactive state data transmission according to the inactive state data transmission type; if the SDT recording function indication message sent by the base station indicates that the user terminal enables recording of the transmission process of the data in the inactive state, recording the transmission failure times of the data in the inactive state and the terminal configuration information according to the SDT recording configuration information sent by the base station; if the failure times reach a preset threshold, switching the current state from the non-activated state to a connected state; and performing data transmission after entering the connection state, and sending SDT record information to the base station through RRC message so that the base station optimizes the inactive state data transmission configuration of the user terminal.
In some embodiments, determining the corresponding inactive state data transmission type according to the SDT resource configuration information sent by the base station includes: judging whether the SDT resource configuration information comprises resource configuration information based on configuration authorization; and if the SDT resource configuration information comprises resource configuration information based on configuration authorization, determining that the transmission type of the data in the inactive state is the data transmission in the inactive state by adopting the configuration authorization resource.
In some embodiments, if the SDT resource configuration information does not include resource configuration information based on configuration authorization, further determining whether the SDT resource configuration information includes resource configuration information based on random access; and if the SDT resource configuration information comprises resource configuration information based on random access, determining that the type of the data transmission in the inactive state is that random access resources are adopted for carrying out data transmission in the inactive state.
In some embodiments, if the SDT resource configuration information does not include resource configuration information based on random access, switching a current state from the inactive state to a connected state; and carrying out data transmission in a connected state.
In some embodiments, the SDT record information includes a number of times of failure of transmission of inactive state data and terminal configuration information, where the terminal configuration information includes uplink carrier information of the user terminal, decision condition information of inactive state data transmission, and current channel state information.
In some embodiments, before determining the corresponding inactive state data transmission type according to the SDT resource configuration information sent by the base station, the method further includes: sending terminal capability information of the user terminal to a core network, wherein the terminal capability information comprises a supporting condition of the user terminal on an inactive state data transmission function and a supporting condition of the user terminal on an inactive state data transmission process recording function; after entering a connection state, sending an SDT resource configuration request to the base station, and receiving SDT record configuration information sent by the base station; and after receiving an RRC release message sent by the base station, switching the current state from the connected state to the non-activated state, wherein the RRC release message comprises SDT resource configuration information and an SDT recording function indication message.
In some embodiments, the SDT resource configuration request includes at least one of a configuration grant period and a time offset, a configuration granted transport block size, and a configuration grant timer.
In some embodiments, the SDT record configuration information includes at least one of a duration of the record, an interval of the record, a number of inactive data transmission failures, and terminal configuration information.
In some embodiments, the SDT resource configuration information includes resource configuration information based on a configuration grant, wherein the resource configuration information based on the configuration grant includes at least one of a configuration grant period and a time offset, a transport block size of the configuration grant, a configuration grant timer, a timing advance, and a timing advance timer.
In some embodiments, the SDT resource configuration information further comprises random access based resource configuration information, wherein the random access based resource configuration information comprises at least one of a random access preamble format and time-frequency resource configuration information of a random access channel.
According to a second aspect of the embodiments of the present disclosure, there is provided a user terminal, including: a memory configured to store instructions; a processor coupled to the memory, the processor configured to perform a method implementing any of the embodiments described above based on instructions stored by the memory.
According to a third aspect of an embodiment of the present disclosure, there is provided a communication system including: a user terminal as in any preceding embodiment; the base station is configured to send an RRC release message to the user terminal under the condition that the user terminal is determined to be converted into an inactive state, wherein the RRC release message comprises SDT resource configuration information and an SDT recording function indication message; and after receiving the RRC message sent by the user terminal, analyzing SDT record information included in the RRC message, determining the reason of the transmission failure of the data in the inactive state, and optimizing the data transmission configuration in the inactive state of the user terminal.
In some embodiments, the base station is configured to, when it is determined that the corresponding channel is not suitable for transmitting the inactive data according to the channel state information of the user terminal when the inactive data transmission fails, increase a relevant threshold for the inactive data transmission, and decrease a ratio of an inactive data transmission process, so as to decrease a failure probability of the inactive data transmission.
In some embodiments, the base station is further configured to determine the applicable range of the SUL and the NUL according to the carrier selection information of the user terminal when the transmission of the inactive state data fails.
In some embodiments, the base station is configured to adjust a threshold for carrier selection when the user terminal is located at a cell edge and the number of times of transmission failure of inactive data on a NUL carrier exceeds a predetermined threshold, so that when the user terminal is located at the cell edge again, a SUL carrier is selected for transmission.
In some embodiments, the base station is configured to obtain terminal capability information of the user terminal from a core network, receive an SDT resource configuration request sent by the user terminal, and send SDT record configuration information to the user terminal.
According to a fourth aspect of the embodiments of the present disclosure, a computer-readable storage medium is provided, in which computer instructions are stored, and when executed by a processor, the computer-readable storage medium implements the method according to any of the embodiments described above.
Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings may be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic flow chart diagram of a method for improving data transmission performance according to an embodiment of the present disclosure;
FIG. 2 is a flowchart illustrating a method for determining an inactive data transmission type according to one embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a user terminal according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a communication system according to an embodiment of the present disclosure;
fig. 5 is a flowchart illustrating a method for improving data transmission performance according to another embodiment of the disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be described clearly and completely with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the embodiments described are only some embodiments of the present disclosure, rather than all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.
Fig. 1 is a flowchart illustrating a method for improving data transmission performance according to an embodiment of the disclosure. In some embodiments, the following method for improving data transmission performance is performed by a user terminal.
In step 101, in an inactive state, a corresponding inactive state data transmission type is determined according to SDT resource configuration information sent by a base station.
In some embodiments, the step of determining the corresponding inactive data transmission type according to the SDT resource configuration information sent by the base station is as shown in fig. 2.
In step 201, it is determined whether the SDT resource configuration information includes resource configuration information based on a configuration authorization.
If the SDT resource configuration information includes resource configuration information based on the configuration authorization, perform step 202; if the SDT resource configuration information does not include resource configuration information based on the configuration authorization, step 203 is performed.
In step 202, it is determined that the inactive data transmission type is the inactive data transmission using the configuration grant resource.
In step 203, it is determined whether the SDT resource configuration information includes resource configuration information based on random access.
If the SDT resource configuration information includes resource configuration information based on random access, perform step 204; if the SDT resource configuration information does not include resource configuration information based on random access, step 205 is performed.
In step 204, it is determined that the inactive data transmission type is the inactive data transmission using the random access resource.
In step 205, the current state is switched from the inactive state to the connected state, and data transmission is performed in the connected state.
Returning to fig. 1. In step 102, the data transmission in the inactive state is performed according to the data transmission type in the inactive state.
In step 103, if the SDT recording function indication message sent by the base station indicates that the user terminal enables recording of the inactive state data transmission process, the number of transmission failures of the inactive state data and the terminal configuration information are recorded according to the SDT recording configuration information sent by the base station.
In step 104, if the failure times reach a preset threshold, the current state is switched from the inactive state to the connected state.
In step 105, data transmission is performed after entering the connected state, and the SDT record information is sent to the base station through an RRC message, so that the base station optimizes the inactive data transmission configuration of the ue.
In some embodiments, the SDT record information includes at least one of:
-number of inactive data transmission failures: the value defaults to 0. Each time when the user terminal does not receive the feedback information of the data at the base station, the user terminal indicates that the last data transmission fails, and the value is added with 1
-terminal configuration information including uplink carrier information of the user terminal, decision condition information of inactive state data transmission and current channel state information.
In some embodiments, before the step 101, the method further includes: and sending the terminal capability information of the user terminal to the core network so that the base station can obtain the terminal capability information of the user terminal from the core network. The terminal capability information comprises the support condition of the user terminal to the inactive state data transmission function and the support condition of the user terminal to the inactive state data transmission process recording function.
And after entering a connection state, sending the SDT resource configuration request to the base station, and receiving the SDT record configuration information sent by the base station. And after receiving an RRC release message sent by the base station, switching the current state from a connected state to an inactivated state, wherein the RRC release message comprises SDT resource configuration information and an SDT recording function indication message.
In some embodiments, the SDT resource configuration request includes at least one of:
-configuring grant period and time offset: for example, the related configuration parameter of the PURConfigurationRequest in TS36.331, is used to indicate the transmission interval between the configuration grants and the time offset for the start of the first configuration grant
-configuring the granted transport block size
-configuring an authorization timer: for example, configuredGrantTimer in ConfiguredGrantConfig in TS38.331 indicates a relevant parameter for helping the ue determine whether to perform data transmission (including new transmission and retransmission).
In some embodiments, the SDT record configuration information includes at least one of:
-duration of recording: such as LoggedMeasurementConfiguration-related configuration information in TS36.331, instructs the user terminal to record the duration of the monitoring result, and releases the saved measurement information once the recorded duration is exceeded
-interval of recording: indicating and recording period of once non-activated state data transmission monitoring result
-number of inactive data transmission failures: if the data transmission fails in the recording period, the number of failures is increased by 1
-terminal configuration information: including uplink carrier information of the terminal, decision condition information of inactive state data transmission, and current channel state information
In some embodiments, the SDT resource configuration information includes resource configuration information based on the configuration authorization. The resource configuration information based on the configuration authorization includes at least one of:
-configuring grant period and time offset: time offset indicating transmission interval between configuration grants and start of first configuration grant
-configuring the granted transport block size
-configuring an authorization timer: help terminal to judge whether to transmit data (including new transmission and retransmission)
-timing advance: to ensure time synchronization of uplink transmissions
-a timing advance timer: the timer and related procedures are used to maintain validity of small data uplink time alignment
In some embodiments, the SDT resource configuration information further includes resource configuration information based on random access. The resource configuration information based on random access includes at least one of:
-random access preamble format: preamble for inactive random access data transmission is different from conventional random access preamble
Time-frequency resource configuration information of a random access channel
Fig. 3 is a schematic structural diagram of a user terminal according to an embodiment of the present disclosure. As shown in fig. 3, the user terminal includes a memory 31 and a processor 32.
The memory 31 is used for storing instructions, the processor 32 is coupled to the memory 31, and the processor 32 is configured to execute the method according to any one of the embodiments in fig. 1 or fig. 2 based on the instructions stored in the memory.
As shown in fig. 3, the user terminal further includes a communication interface 33 for information interaction with other devices. Meanwhile, the user terminal further comprises a bus 34, and the processor 32, the communication interface 33 and the memory 31 are communicated with each other through the bus 34.
The memory 31 may comprise a high-speed RAM memory, and may also include a non-volatile memory (e.g., at least one disk memory). The memory 31 may also be a memory array. The storage 31 may also be partitioned and the blocks may be combined into virtual volumes according to certain rules.
Further, the processor 32 may be a central processing unit CPU, or may be an application specific integrated circuit ASIC, or one or more integrated circuits configured to implement embodiments of the present disclosure.
The present disclosure also relates to a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the instructions, when executed by a processor, implement a method according to any one of the embodiments shown in fig. 1 or fig. 2.
Fig. 4 is a schematic structural diagram of a communication system according to an embodiment of the present disclosure. As shown in fig. 4, the communication system includes a user terminal 41 and a base station 42. The user terminal 41 is the user terminal according to any embodiment in fig. 3.
The base station 42 is configured to send an RRC release message to the user terminal 41 in case it is decided to transfer the user terminal 41 to the inactive state, the RRC release message including SDT resource configuration information and an SDT recording function indication message. The base station 42 is further configured to, after receiving the RRC message sent by the user terminal 41, analyze the SDT record information included in the RRC message, determine a reason for the failure of the inactive data transmission, and optimize the inactive data transmission configuration of the user terminal 41.
In some embodiments, the base station 42 is configured to, in case that it is determined that the corresponding channel is not suitable for transmitting the inactive state data according to the channel state information of the ue 41 when the inactive state data transmission fails, increase a relevant threshold for the inactive state data transmission, and decrease a proportion of the inactive state data transmission process, so as to decrease a failure probability of the inactive state data transmission.
In some embodiments, the base station 42 is further configured to determine the applicable ranges of SUL (Supplementary Uplink) and NUL (Normal Uplink) according to the carrier selection information of the ue 41 when the inactive data transmission fails.
For example, the base station 42 is configured to adjust the threshold of carrier selection in the case that the user terminal 41 is located at the cell edge and the number of times of failure of transmission of inactive data on the NUL carrier exceeds a predetermined threshold, so that when the user terminal 41 is located at the cell edge again, the SUL carrier is selected for transmission.
In some embodiments, the base station is configured to obtain terminal capability information of the user terminal from the core network, receive an SDT resource configuration request sent by the user terminal, and send SDT record configuration information to the user terminal.
In some embodiments, the functional unit modules described above can be implemented as a general purpose Processor, a Programmable Logic Controller (PLC), a Digital Signal Processor (Digital Signal Processor, DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable Logic device, discrete Gate or transistor Logic, discrete hardware components, or any suitable combination thereof for performing the functions described in this disclosure.
The present disclosure is illustrated below by way of specific examples, as shown in fig. 5.
In step 501, after the UE is powered on, the UE first executes an attach procedure, and in the process, reports terminal capability information to the core network, where the terminal capability information includes a support condition of the UE for the inactive data transmission function and a support condition of the UE for the inactive data transmission process recording function.
In step 502, the base station acquires and stores terminal capability information from the core network.
In step 503, after entering the connected state, the UE sends an SDT resource configuration request to the base station for indicating the UE's preference for configuring authorized resources.
The SDT resource configuration request message includes:
-configuring a grant period and a time offset: for example, the related configuration parameter of the PURConfigurationRequest in TS36.331 is used to indicate the transmission interval between the configuration grants and the time offset for the start of the first configuration grant
-configuring the granted transport block size
-configuring an authorization timer, such as configuredgrantimer in ConfiguredGrantConfig in TS38.331 indicating a relevant parameter for assisting the UE in determining whether to transmit data (including new transmissions and retransmissions)
In step 504, the base station sends the SDT record configuration information to the UE when the UE is in the connected state.
The SDT record configuration information includes:
-duration of recording: e.g. loggetmeasurementconfiguration related configuration information in TS36.331, indicating the duration of recording the monitoring result by the UE, releasing the saved measurement information once the recorded duration is exceeded
-interval of recording: indicating and recording period of once non-activated state data transmission monitoring result
-number of inactive data transmission failures: if the data transmission fails in the recording period, the failure times are added by 1
-configuration information of the terminal: including uplink carrier information of the UE, decision condition information of inactive state data transmission, and current channel state information
In step 505, the base station sends an RRC release message to the UE when it is determined to transfer the UE to the inactive state. The RRC release message includes SDT resource configuration information and SDT recording function indication message. The SDT resource configuration information includes resource configuration information based on configuration authorization and resource configuration information based on random access.
The resource configuration information based on the configuration authorization includes:
-configuring grant period and time offset: time offset indicating transmission interval between configuration grants and start of first configuration grant
-configuring the granted transport block size
-configuring an authorization timer: help terminal judge whether to transmit data (including new transmission and retransmission)
-timing advance: to ensure time synchronization of uplink transmissions
-a timing advance timer: the timer and related procedures are used to maintain validity of small data uplink time alignment
The resource configuration information based on random access includes:
-random access preamble format: preamble for inactive random access data transmission is different from conventional random access preamble
Time-frequency resource configuration information of a random access channel
In step 506, the ue switches the current state from the connected state to the inactive state after receiving the RRC release message.
In step 507, in the inactive state, the UE determines the corresponding inactive state data transmission type according to the SDT resource configuration information sent by the base station.
In some embodiments, the UE first determines whether the SDT resource configuration information includes resource configuration information based on a configuration grant. And if the SDT resource configuration information comprises resource configuration information based on configuration authorization, determining that the type of the data transmission in the inactive state is that the data transmission in the inactive state is carried out by adopting the configuration authorization resource. Otherwise, the UE further determines whether the SDT resource configuration information includes resource configuration information based on random access. And if the SDT resource configuration information comprises resource configuration information based on random access, determining that the data transmission type in the non-activated state is the data transmission in the non-activated state by adopting random access resources, otherwise, switching the current state from the non-activated state to the connected state, and performing data transmission in the connected state.
For example, in the transmission process based on the configuration authorization, the UE determines whether to perform data transmission according to the configuration authorization timer. During the timer running, the current HARQ (Hybrid Automatic Repeat Request) process is not allowed to be used for transmitting new data. When the timer stops running, the UE may use the HARQ process for the next data transmission, where the transmission includes both new transmission and retransmission: if the UE receives retransmission scheduling from the network during the running of the timer, the UE uses the HARQ for retransmission when the timer stops operating. Otherwise, the UE performs new transmission using the HARQ process.
For another example, when the UE only satisfies the inactive random access data transmission condition, the UE performs data transmission by using a random access procedure. The UE sends data to the network through Msg3 or MsgA, considering that the data may increase the Msg3 or MsgA message size, in order to ensure the transmission of the data in the inactive state, compared with the ordinary random access process, the transmission process of the data in the inactive state needs a better channel state, or the terminal needs to be closer to the center of the cell.
In step 508, the ue performs the inactive state data transmission according to the inactive state data transmission type.
In step 509, if the SDT recording function indication message sent by the base station indicates that the UE enables recording of the inactive state data transmission process, the UE records the number of times of transmission failure of the inactive state data and the terminal configuration information according to the SDT recording configuration information sent by the base station.
In step 510, if the failure times reach a preset threshold, the UE switches the current state from the inactive state to the connected state, and performs data transmission after entering the connected state. And the UE sends the SDT record information to the base station through RRC message.
The SDT recording information includes:
number of inactive state data transmission failures: the value defaults to 0. Each time when the user terminal does not receive the feedback information of the data at the base station, the user terminal indicates that the last data transmission fails, and the value is added with 1
-terminal configuration information including uplink carrier information of the user terminal, decision condition information of inactive state data transmission and current channel state information.
In step 511, after receiving the RRC message sent by the UE, the base station analyzes SDT record information included in the RRC message, determines a reason for failure of transmission of the inactive state data, and optimizes a configuration of transmission of the inactive state data of the UE.
For example, when the base station determines that the corresponding channel is not suitable for transmitting the inactive state data according to the channel state information of the UE when the inactive state data transmission fails, the base station increases the relevant threshold for transmitting the inactive state data, and decreases the proportion of the inactive state data transmission process, so as to decrease the failure probability of the inactive state data transmission.
For another example, the base station determines the applicable ranges of the SUL and the NUL according to the carrier selection information of the UE when the data transmission in the inactive state fails. And under the condition that the UE is positioned at the edge of the cell and the transmission failure times of the non-activated data on the NUL carrier exceed a preset threshold, adjusting a threshold value of carrier selection so as to select the SUL carrier for transmission when the UE is positioned at the edge of the cell again.
By implementing the above embodiments of the present disclosure, the following beneficial effects can be obtained:
in the disclosure, the base station sends the SDT record configuration information to the user terminal through RRC signaling, and the user terminal records the number and configuration of the inactive state data transmission failures according to the SDT record configuration information, which helps to optimize the inactive state data transmission process and improve the inactive state data transmission performance
In the disclosure, the ue sends the recorded related information of the transmission failure of the inactive data to the base station through RRC signaling, and the base station optimizes the transmission process of the inactive data according to the received information, so as to reduce the probability of the transmission failure of the inactive data and improve the transmission performance of the inactive data
The method has the advantages of small change to the terminal, good backward compatibility and deployment feasibility. The method and the device are enhanced on the existing protocol, do not introduce a new protocol process, and have lower realization difficulty
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The description of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the disclosure in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the disclosure and the practical application, and to enable others of ordinary skill in the art to understand the disclosure for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (17)
1. A method for improving data transmission performance, the method being performed by a user terminal, comprising:
in the non-activated state, determining a corresponding non-activated state data transmission type according to SDT resource configuration information sent by a base station;
carrying out inactive state data transmission according to the inactive state data transmission type;
if the SDT recording function indication message sent by the base station indicates that the user terminal enables recording of the transmission process of the data in the inactive state, recording the transmission failure times of the data in the inactive state and the terminal configuration information according to the SDT recording configuration information sent by the base station;
if the failure times reach a preset threshold, switching the current state from the non-activated state to a connected state;
and performing data transmission after entering the connection state, and sending SDT record information to the base station through an RRC message so that the base station optimizes the inactive state data transmission configuration of the user terminal.
2. The method of claim 1, wherein determining the corresponding inactive data transmission type according to the SDT resource configuration information sent by the base station comprises:
judging whether the SDT resource configuration information comprises resource configuration information based on configuration authorization;
and if the SDT resource configuration information comprises resource configuration information based on configuration authorization, determining that the type of the data transmission in the inactive state is that the data transmission in the inactive state is carried out by adopting the configuration authorization resource.
3. The method of claim 2, further comprising:
if the SDT resource configuration information does not include resource configuration information based on configuration authorization, further judging whether the SDT resource configuration information includes resource configuration information based on random access;
and if the SDT resource configuration information comprises resource configuration information based on random access, determining that the type of the data transmission in the inactive state is that random access resources are adopted for carrying out data transmission in the inactive state.
4. The method of claim 3, further comprising:
if the SDT resource configuration information does not include resource configuration information based on random access, switching the current state from the inactive state to a connected state;
and carrying out data transmission in a connected state.
5. The method of claim 1, wherein,
the SDT record information comprises the transmission failure times of the data in the inactive state and the terminal configuration information, wherein the terminal configuration information comprises the uplink carrier information of the user terminal, the judgment condition information of the data transmission in the inactive state and the current channel state information.
6. The method according to any of claims 1-5, before determining the corresponding inactive data transmission type according to the SDT resource configuration information sent by the base station, further comprising:
sending terminal capability information of the user terminal to a core network, wherein the terminal capability information comprises a supporting condition of the user terminal on an inactive state data transmission function and a supporting condition of the user terminal on an inactive state data transmission process recording function;
after entering a connection state, sending an SDT resource configuration request to the base station, and receiving SDT record configuration information sent by the base station;
and after receiving an RRC release message sent by the base station, switching the current state from the connected state to the non-activated state, wherein the RRC release message comprises SDT resource configuration information and an SDT recording function indication message.
7. The method of claim 6, wherein,
the SDT resource configuration request comprises at least one of a configuration authorization period and a time offset, a configuration authorized transport block size and a configuration authorization timer.
8. The method of claim 6, wherein,
the SDT record configuration information comprises at least one of record duration, record interval, inactive state data transmission failure times and terminal configuration information.
9. The method of claim 6, wherein,
the SDT resource configuration information comprises resource configuration information based on configuration authorization, wherein the resource configuration information based on the configuration authorization comprises at least one of a configuration authorization period and a time offset, a transport block size of the configuration authorization, a configuration authorization timer, a timing advance and a timing advance timer.
10. The method of claim 9, wherein,
the SDT resource configuration information further includes resource configuration information based on random access, where the resource configuration information based on random access includes at least one of a random access preamble format and time-frequency resource configuration information of a random access channel.
11. A user terminal, comprising:
a memory configured to store instructions;
a processor coupled to the memory, the processor configured to perform implementing the method of any of claims 1-10 based on instructions stored by the memory.
12. A communication system, comprising:
the user terminal of claim 11;
the base station is configured to send an RRC release message to the user terminal under the condition that the user terminal is determined to be converted into an inactive state, wherein the RRC release message comprises SDT resource configuration information and an SDT recording function indication message; and after receiving the RRC message sent by the user terminal, analyzing SDT record information included in the RRC message, determining the reason of the transmission failure of the data in the inactive state, and optimizing the data transmission configuration in the inactive state of the user terminal.
13. The system of claim 12, wherein,
the base station is configured to increase a relevant threshold of the transmission of the data in the inactive state and reduce the proportion of the transmission process of the data in the inactive state so as to reduce the failure probability of the transmission of the data in the inactive state under the condition that the corresponding channel is determined to be not suitable for transmitting the data in the inactive state according to the channel state information of the user terminal when the transmission of the data in the inactive state fails.
14. The system of claim 12, wherein,
the base station is further configured to determine an application range of the SUL and the NUL according to carrier selection information of the user terminal when the transmission of the inactive state data fails.
15. The system of claim 14, wherein,
the base station is configured to adjust a threshold for carrier selection when the user terminal is located at a cell edge and the number of times of transmission failure of inactive data on the NUL carrier exceeds a predetermined threshold, so that when the user terminal is located at the cell edge again, the SUL carrier is selected for transmission.
16. The system of any one of claims 12-15,
the base station is configured to acquire terminal capability information of the user terminal from a core network, receive an SDT resource configuration request sent by the user terminal, and send SDT record configuration information to the user terminal.
17. A computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions which, when executed by a processor, implement the method of any one of claims 1-10.
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