CN115669149A - Uplink data transmission method, device, terminal and storage medium - Google Patents

Uplink data transmission method, device, terminal and storage medium Download PDF

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Publication number
CN115669149A
CN115669149A CN202080101130.8A CN202080101130A CN115669149A CN 115669149 A CN115669149 A CN 115669149A CN 202080101130 A CN202080101130 A CN 202080101130A CN 115669149 A CN115669149 A CN 115669149A
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data
priority
mac pdu
logical channel
idt
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林雪
石聪
李海涛
尤心
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The application discloses an uplink data transmission method, an uplink data transmission device, a terminal and a storage medium, and belongs to the technical field of Internet of things. The method comprises the following steps: when the terminal is in an RRC inactive state, if an inactive transmission condition is met, data from a logical channel capable of triggering the IDT is filled into MAC PDU corresponding to a UL grant through an LCP mode, so that a feasible scheme that LCP processing is realized by utilizing the UL grant to establish the MAC PDU in an IDT flow is provided, uplink data transmission is realized in the inactive state, RRC connection does not need to be recovered or established every time data needs to be transmitted, and power consumption and signaling resources are saved.

Description

Uplink data transmission method, device, terminal and storage medium Technical Field
The present application relates to the field of wireless communications technologies, and in particular, to an uplink data transmission method, an apparatus, a terminal, and a storage medium.
Background
In a fifth Generation mobile communication (5 th-Generation, 5G) network, a Radio Resource Control (RRC) INACTIVE state (RRC _ INACTIVE) is introduced in consideration of energy saving.
For a terminal in an RRC _ INACTIVE state, radio bearers and all radio resources are released, but the terminal side and the base station side retain the access context of the terminal so as to quickly recover RRC connection, the network side usually keeps the terminal with infrequent data transmission in the RRC _ INACTIVE state, when data arrives, the terminal recovers the RRC connection, and after the data transmission is completed, the terminal releases the RRC connection so as to return to the RRC _ INACTIVE state.
In the above scheme, even when the amount of data to be transmitted is small, the terminal needs to recover the RRC connection from the RRC _ INACTIVE state and return to the RRC _ INACTIVE state after the data is transmitted, which requires a large amount of power consumption and signaling resources.
Disclosure of Invention
The embodiment of the application provides an uplink data transmission method, an uplink data transmission device, a terminal and a storage medium. The technical scheme is as follows:
in one aspect, an embodiment of the present application provides an uplink data transmission method, where the method includes:
when the terminal is in a Radio Resource Control (RRC) inactive state and meets an IDT condition of inactive data transmission, determining a first uplink scheduling grant (UL grant) according to a target IDT resource;
performing logical channel priority processing on first data according to the first UL grant to multiplex the first data to a first media access control protocol data unit (MAC PDU); the first data is data from a first type logic channel in the data to be sent of the terminal; the first type logical channel is a logical channel of a triggerable IDT;
and transmitting uplink data to the network side equipment based on the first MAC PDU.
On the other hand, an embodiment of the present application provides an uplink data transmission apparatus, where the apparatus includes:
a first uplink grant determining module, configured to determine a first uplink scheduling grant UL grant according to a target IDT resource when a terminal is in an RRC inactive state and an IDT condition for inactive data transmission is met;
a first data processing module, configured to perform logical channel priority processing on first data according to the first UL grant, so as to multiplex the first data to a first MAC PDU; the first data is data from a first type logic channel in the data to be sent of the terminal; the first type logical channel is a logical channel of a triggerable IDT;
and the first uplink data transmission module is used for transmitting uplink data to the network side equipment based on the first MAC PDU.
In another aspect, an embodiment of the present application provides a terminal, where the terminal includes a processor, a memory, and a transceiver, where the memory stores a computer program, and the computer program is used to be executed by the processor, so as to implement the uplink data transmission method.
In another aspect, an embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored in the storage medium, and the computer program is loaded and executed by a processor to implement the uplink data transmission method.
In another aspect, a computer program product or computer program is provided, the computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the terminal reads the computer instruction from the computer readable storage medium, and the processor executes the computer instruction, so that the terminal executes the uplink data transmission method.
The technical scheme provided by the embodiment of the application can bring the following beneficial effects:
when the terminal is in an RRC inactive state, if an inactive transmission condition is met, data from a logical channel capable of triggering the IDT is filled into MAC PDU corresponding to a UL grant through an LCP mode, so that a feasible scheme that LCP processing is realized by utilizing the UL grant to establish the MAC PDU in an IDT flow is provided, uplink data transmission is realized in the inactive state, RRC connection does not need to be recovered or established every time data needs to be transmitted, and power consumption and signaling resources are saved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a network architecture of a communication system according to an embodiment of the present application;
fig. 2 is a flowchart of an uplink data transmission method according to an embodiment of the present application;
fig. 3 is a schematic diagram of uplink data transmission of the terminal in the inactive state according to the embodiment shown in fig. 2;
fig. 4 is a flowchart of an uplink data transmission method according to an embodiment of the present application;
fig. 5 is a schematic diagram illustrating an IDT transmission flow according to an embodiment of the present application;
fig. 6 is a schematic diagram of uplink transmission according to the embodiment shown in fig. 5;
fig. 7 is a schematic diagram of another uplink transmission according to the embodiment shown in fig. 5;
fig. 8 is a block diagram of an uplink data transmission apparatus according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of a computer device according to an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not constitute a limitation to the technical solution provided in the embodiment of the present application, and it can be known by a person skilled in the art that the technical solution provided in the embodiment of the present application is also applicable to similar technical problems along with the evolution of the network architecture and the appearance of a new service scenario.
Referring to fig. 1, a schematic diagram of a network architecture of a communication system according to an embodiment of the present application is shown. The network architecture may include: a terminal 10 and a base station 20.
The number of terminals 10 is usually plural, and one or more terminals 10 may be distributed in a cell managed by each base station 20. The terminal 10 may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem having wireless communication functions, as well as various forms of User Equipment (UE), mobile Station (MS), terminal Equipment (terminal device), and so forth. For convenience of description, in the embodiments of the present application, the above-mentioned devices are collectively referred to as a terminal.
The base station 20 is a device deployed in an access network to provide a wireless communication function for the terminal 20. The base station 20 may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different Radio access technologies, names of devices having a base station function may be different, for example, in a 5G New Radio (NR) system, called a nodeb or a gNB. The name "base station" may change as communication technology evolves. For convenience of description, in the embodiment of the present application, the above-mentioned apparatuses providing the terminal 20 with the wireless communication function are collectively referred to as a base station.
Optionally, not shown in fig. 1, the network architecture further includes other network devices, such as: a Central Control Node (CNC), an Access and Mobility Management Function (AMF) device, a Session Management Function (SMF) or User Plane Function (UPF) device, and so on.
The "5G NR system" in the embodiments of the present disclosure may also be referred to as a 5G system or an NR system, but those skilled in the art can understand the meaning thereof. The technical scheme described in the embodiment of the present disclosure may be applied to a 5G NR system, and may also be applied to a subsequent evolution system of the 5G NR system.
For ease of understanding, the following description is made with reference to the concepts of the terms related to the present application:
one) Logical Channel Priority (LCP)
Similar to the Long Term Evolution (LTE) system, in the NR system, the network allocates uplink transmission resources based on each terminal (per-UE) instead of each token (per-bearer), and the terminal determines which data of the radio bearer can be put into the allocated uplink transmission resources for transmission.
Based on the uplink transmission resources configured by the network, the terminal needs to determine the transmission Data amount of each logical channel in the initial transmission (MAC PDU), and in some cases, the terminal also needs to allocate resources for a MAC Control Element (CE). In order to realize multiplexing of uplink logical channels, a priority needs to be allocated to each uplink logical channel. For a MAC PDU with a given size, under the condition that a plurality of uplink logical channels have data transmission requirements at the same time, resources of the MAC PDU are sequentially distributed according to the sequence from large to small of the logical channel priority corresponding to each uplink logical channel. Meanwhile, in order to take account of fairness among different logical channels, a concept of Prioritized Bit Rate (PBR) is introduced, that is, when a terminal multiplexes logical channels, a minimum data Rate requirement of each logical channel needs to be ensured first, so as to avoid a situation that other uplink logical channels with low priorities of the terminal are starved because an uplink logical channel with high priority always occupies uplink resources allocated to the terminal by a network.
In order to realize the multiplexing of the uplink logical channels, the network side configures the following parameters for each uplink logical channel through the RRC connection:
a) Logical channel priority: the smaller the value of the priority is, the higher the corresponding priority is;
b) PBR: a priority bit rate indicating a minimum rate that the logical channel needs to guarantee;
c) BSD (bucket Size Duration) this parameter determines the depth of the token bucket.
And the MAC layer of the terminal realizes uplink logical channel multiplexing by using a token bucket mechanism. For example, the terminal maintains a variable Bj for each uplink logical channel j, where the variable indicates the number of tokens currently available in the token bucket, and the method is as follows:
step 1, when a terminal establishes a logic channel j, initializing Bj to be 0;
step 2, before each LCP process, the terminal increases PBR T to the Bj, wherein T is the time interval from the previous increase of the Bj to the current time;
and 3, if the updated Bj is larger than the maximum capacity (PBR) of the token bucket according to the step 2, setting the Bj as the maximum capacity of the token bucket.
When the terminal receives an uplink scheduling grant (Up Link grant, UL grant) indicating new transmission, the terminal performs logical channel priority processing according to the following steps:
a, step a: for all logical channels with Bj >0, allocating resources according to the sequence from high priority to low priority, where the resource allocated to each logical channel can only meet the PBR requirement, that is, allocating resources for the logical channel according to the number of tokens in the PBR token bucket corresponding to the logical channel. When PBR of a certain logical channel is set to infinity, a logical channel with a lower priority than that logical channel is considered only when the resources of this logical channel are satisfied.
Step b: the size of all MAC SDUs multiplexed into a MAC PDU in step 1 is subtracted from Bj by logical channel j.
C, if there are residual uplink resources after the step a and the step b are executed, the residual resources are sequentially distributed to the logic channels according to the sequence from high priority to low priority of the logic channels regardless of the size of the Bj. Only when the data of the logical channel with high priority is completely transmitted and the UL grant is not exhausted, the logical channel with low priority can be served. I.e. when the UE maximizes data transmission for the logical channel of high priority.
Meanwhile, the terminal should follow the following principle:
if the whole Radio Link Control Service Data Unit (RLC SDU) can be filled in the remaining resources, the RLC SDU should not be segmented;
if the terminal segments RLC SDU in the logic channel, filling the maximum segment as much as possible according to the size of the residual resource;
the terminal should maximize the transmission of data;
if the UL grant size is greater than or equal to 8 bytes (bytes) and the terminal has a data transmission requirement, the terminal cannot transmit only padding (BSR) or padding only.
For different signals and/or logical channels, the following priority order (in order of priority from high to low) also needs to be followed when the terminal performs logical channel priority processing:
a Cell-Radio Network Temporary Identifier (C-RNTI) MAC CE or data from an uplink Common Control Channel (UL-CCCH);
configured authorization Confirmation (Configured Grant configuration) MAC CE;
for Buffer Status Report (BSR) MAC CEs other than padding BSR;
a Single Entry (Single Entry) Power Headroom (PHR) MAC CE or a Multiple Entry (Multiple Entry) PHR MAC CE;
data from any logical channel other than UL-CCCH;
a MAC CE for Recommended bit rate query (Recommended bit rate query);
BSR MAC CE for padding BSR.
Two) pre-configured Uplink Resource (PUR)
In LTE Release16, a method for transmitting data by using a preconfigured uplink resource PUR in an IDLE (IDLE) state is introduced for a narrowband Internet of Things (NB-IoT) and an Enhanced Machine Type Communication (eMTC) scenario. The process of sending the PUR configuration request and receiving the network PUR configuration by the terminal is as follows:
when the cell in which the terminal is located supports the PUR transmission, the terminal may Request the PUR through a PUR Configuration Request in a connected state, where the PUR Configuration Request may selectively include a requested PUR period, a Transport Block Size (TBS), the number of PURs, and the like; (ng-) the eNB configures PUR for the terminal by including a PUR-Config field in the RRC connection Release message, and releases the terminal to an IDLE state. The configuration of the PUR is decided by the (ng-) eNB, possibly based on the request of the terminal, terminal registration information and/or local policy.
Optionally, the PUR is only valid in the currently configured cell, that is, when the terminal detects a cell change and initiates random access in a new cell, the terminal needs to release the PUR configured in the original cell.
For an Evolved Packet System (EPS)/5G System (5G systom, 5gs) cellular internet of things user plane function optimization scheme, before a terminal in an IDLE state performs data transmission by using a PUR, the following preconditions need to be satisfied:
condition 1: effective Timing Advance (TA).
TA needs to satisfy both of the above two conditions:
1) TA timer (timer): after the MAC layer receives the high-level indication, the TA timer is started, when the high level judges the TA validity, whether the TA timer is in the operation period or not can be confirmed to the MAC layer, and when the TA timer is overtime, the MAC layer needs to feed back to the high level.
2) Reference Signal Receiving Power (RSRP) variation: the change (increase or decrease) in RSRP, if greater than a set threshold, is considered a TA failure.
Condition 2: next Hop Chaining Count (NCC).
NCC is included in RRC Connection Release message for derivation of new keys;
condition 3: an efficient PUR.
Condition 4: there is a RRC connection establishment or recovery requirement.
For example, when uplink data arrives, it is determined that there is a need for RRC connection establishment or recovery.
For the EPS/5GS cellular Internet of things user plane function optimization scheme, the flow of data transmission by the terminal in the IDLE state by using the PUR is as follows:
s0, the terminal determines that the PUR transmission precondition is met;
s1, a terminal sends an RRC Connection Resume Request message to an eNB/ng-eNB, wherein the RRC Connection Resume Request message comprises Resume ID/I-RNTI, lease duration cause and short Resume MAC-I, the Resume ID/IRNTI is used for a base station to identify the context of UE in a suspend state, and the short Resume MAC-I is used for identity verification. The terminal recovers all Signaling Radio Bearer (SRB) and Data Radio Bearer (DRB), and by using NCC derived new key contained in the last connected RRC Connection Release message, user Data is encrypted and transmitted on a Dedicated Traffic Channel (DTCH), and multiplexed with RRC Connection Request on CCCH.
S2, a small Data Transmission (MO-EDT) process of a caller.
S3, after the eNB/ng-eNB delivers the user data to the core network, the terminal is kept in an IDLE state through an RRC Connection Release message, and the RRC Connection Release contains the following information:
a) The release Cause is set to be RRC-Suspend;
b)resume ID/I-RNTI；
c)NCC；
d)drb-ContinueROHC。
if the network has downlink data transmission, the downlink data is encrypted and transmitted through DTCH and is multiplexed with RRC Connection Release messages on a DCCH.
Three) uplink EDT (UP-EDT)
In LTE, EDT, i.e. small data transmission, has been introduced, and during this process, the terminal may always remain in a suspend state, and complete transmission of uplink and/or downlink small data packets. For example, the flow of the user plane transmission scheme is as follows:
s0, the terminal selects one lead code group used for indicating the EDT to send to the eNB, an EDT transmission process is initiated, and the eNB configures uplink resources and TA used for the EDT for the terminal through the RAR after receiving the corresponding lead code;
s1, the terminal sends an RRC Connection Resume Request message to the eNB, wherein the RRC Connection Resume Request message comprises Resume ID, update cause and shortResume MAC-I. The terminal side recovers all SRBs and DRBs and derives a new key through the NCC contained in the last connection release message. User data is encrypted and transmitted on a DTCH and is multiplexed with an RRC Connection Resume Request;
s2, the eNB establishes the S1 connection, initiates a context recovery flow to the MME and reactivates the bearing between the S1-U;
s3, the MME initiates a request to the S-GW to reactivate the load between the UE S1-U for the subsequent user data delivery to the S-GW;
s4, the MMC confirms to restore the UE context to the eNB;
s5, submitting user data to an S-GW;
s6, if the S-GW sends downlink data, the S-GW delivers the downlink data to the eNB;
s7, the eNB suspend S1 is connected, and the MME deactivates the bearing between the UE S1 and the UE U;
s8, the eNB sends an RRC Connection Release message to the UE, and the UE is continuously kept in a suspend state.
For the data transmission process, the terminal does not enter a connection state, and the transmission of the small data packet is completed. In configuration, a network side configures a maximum TB size allowed to be transmitted by a current network in a System Information Block (SIB), such as SIB2, and a terminal determines the amount of data to be transmitted, and if the size is smaller than the size of the maximum Transport Block (TB) of the broadcast, the terminal may initiate EDT transmission; otherwise, the terminal uses the normal connection establishment process to enter the connection state to transmit data.
In the 5G NR system, RRC states are divided into 3 types, which are: RRC _ IDLE (RRC IDLE state), RRC _ INACTIVE (RRC INACTIVE state), and RRC _ CONNECTED (RRC CONNECTED state). Wherein the RRC _ INACTIVE state is a new state introduced by the 5G system from a power saving point of view. Before Rel-16, the UE in RRC _ INACTIVE state does not support data transmission, when MO or MT data arrives, the UE needs to recover connection, and the UE is released to INACTIVE state after the data transmission is completed. For UEs with small data size and low transmission frequency, such transmission mechanisms may result in unnecessary power consumption and signaling overhead. Therefore, rel-17 has conducted research on data transmission under RRC _ INACTIVE, and the project targets are mainly two directions: uplink small data transmission based on a random access procedure (two steps/four steps) and uplink small data transmission based on a pre-configured resource (e.g., CG type 1).
The EDT in the LTE system mainly has NB-IoT and eMTC, so the Service type is single, but the Service type in the 5G NR system is rich, and the Quality of Service (QoS) configuration is more refined. In order to satisfy more scenarios and services, the data transmission in INACTIVE state can be configured according to logical channels, and specific services are defined to trigger IDT flow.
The embodiment of the application provides a feasible scheme for an Inactive Data Transmission (IDT) flow based on a Logical Channel, and for how to use an UL grant to execute a Logical Channel Priority (LCP) to construct a MAC PDU.
Referring to fig. 2, a flowchart of an uplink data transmission method according to an embodiment of the present application is shown, where the method may be executed by a terminal, where the terminal may be the terminal 10 in the network architecture shown in fig. 1. The method may include the steps of:
step 201, when the terminal is in the radio resource control RRC inactive state and satisfies the inactive data transmission IDT condition, determining a first uplink scheduling grant UL grant according to the target IDT resource.
The IDT condition is preset in the terminal and is used for judging whether the IDT process is triggered.
In a possible implementation manner, the UL grant is used to determine a format of an uplink transmission signal of a terminal, and the format includes: resource allocation information, and transmission format, etc.
Step 202, according to the first UL grant, performing logical channel priority processing on the first data to multiplex the first data to a first MAC PDU; the first data is data from a first type logic channel in the data to be sent of the terminal; the first type logical channel is a logical channel that can trigger an IDT.
The data capacity of the first MAC PDU is indicated by the first UL grant, and for example, the data capacity of the first MAC PDU is indicated by the resource allocation information.
In one possible implementation manner, the logical channel of the triggerable IDT is configured in the terminal in advance.
Step 203, based on the first MAC PDU, performing uplink data transmission to the network side device.
Please refer to fig. 3, which illustrates a schematic diagram of uplink data transmission of a terminal in an inactive state according to an embodiment of the present application. As shown in fig. 3, when the terminal detects that the IDT condition is satisfied, the terminal triggers selection of a target IDT resource 31, determines a first uplink scheduling grant 32 based on the target IDT resource, constructs a first MAC PDU 33 according to the first uplink scheduling grant 32, then the terminal first multiplexes first data 34 from a logical channel of the triggerable IDT to the first MAC PDU 33 through LCP processing, and then the terminal initiates uplink data transmission to the network side based on the first MAC PDU 33.
To sum up, according to the scheme shown in the embodiment of the present application, when the terminal is in the RRC inactive state, if the inactive transmission condition is satisfied, the data from the logical channel that can trigger the IDT is filled into the MAC PDU corresponding to the UL grant in the LCP mode, so as to provide a feasible scheme for implementing LCP processing by using the UL grant to construct the MAC PDU in the IDT flow, thereby implementing uplink data transmission in the inactive state, and it is not necessary to recover or establish the RRC connection every time there is data to be transmitted, thereby saving power consumption and signaling resources.
Referring to fig. 4, a flowchart of an uplink data transmission method according to an embodiment of the present application is shown, where the method may be performed by a terminal and a network side device, where the terminal may be the terminal 10 in the network architecture shown in fig. 1, and the network side device may be the base station 20 in the network architecture shown in fig. 1. The method may include the steps of:
step 401, the network side device issues configuration information to the terminal, and correspondingly, the terminal receives the configuration information issued by the network side device.
Wherein the configuration information is used to indicate at least one of the following information:
a first type logical channel, an IDT trigger condition, and IDT resources.
In another possible implementation, the configuration information may indicate at least one of a second type logical channel, an IDT condition, and preconfigured IDT resources.
In a possible implementation manner, the network side device issues the configuration information to the terminal through the designated signaling, and correspondingly, the terminal receives the configuration information issued by the network side device through the designated signaling.
Wherein the specific signaling comprises at least one of broadcast signaling and dedicated signaling.
Wherein the first type logical channel is a logical channel of a triggerable IDT, and the second type logical channel is a logical channel of a non-triggerable IDT. For convenience of description, in the embodiments of the present application, data of a logical channel from a triggerable IDT may be referred to as IDT data, and data of a logical channel from a Non-triggerable IDT may be referred to as Non-IDT data.
And after receiving the configuration information, the terminal configures the first type logic channel, the IDT condition and the IDT resource according to the configuration information.
Wherein the IDT condition comprises at least one of the following conditions:
transport block size, TBS, threshold; wherein the TBS is configured to indicate a number of bits transmitted in a single transmission time interval;
and the number of the first and second groups,
whether the next hop linking parameter NCC is present.
The IDT resources include at least one of the following IDT resources:
based on IDT resources accessed randomly in the 4 steps; such as preamble, physical Random Access Channel (PRACH) resources, etc.;
based on IDT resources accessed randomly in the step 2; such as preamble, physical Uplink Shared Channel (PUSCH) resources associated with the preamble, etc.;
and, pre-configured resources for IDT transmissions; namely, a configuration granted Grant (CG) resource, such as time-frequency location information, period information, and the like.
Step 402, when the terminal is in the radio resource control RRC inactive state and the inactive data transfer IDT condition is satisfied, determining a target IDT resource from the pre-configured IDT resources according to the IDT triggering condition.
For example, when the IDT condition includes the TBS threshold, if the data amount of IDT data to be transmitted in the terminal reaches the TBS threshold or approaches the TBS threshold (for example, the ratio of the data amount of IDT data to the TBS threshold reaches a preset ratio threshold), it is determined that the IDT condition is satisfied.
Alternatively, when the IDT condition includes the presence of the next hop link parameter NCC, if the terminal determines that the NCC is present, it is determined that the IDT condition is satisfied.
Alternatively, when the IDT condition includes that the next hop link parameter NCC is not present, if the terminal determines that the NCC is not present, it is determined that the IDT condition is satisfied.
In a possible implementation manner, the terminal determines the target IDT resource from the pre-configured IDT resources according to the data volume of data to be transmitted in the terminal.
For example, the terminal determines the target IDT resource from the pre-configured IDT resources according to the data amount of IDT data in the data to be transmitted.
Or, the terminal determines the target IDT resource from the preset IDT resources according to the total data of the data to be transmitted.
In step 403, the terminal determines a first uplink scheduling grant UL grant according to the target IDT resource.
For example, if the terminal selects an IDT resource based on 4-step random access in step 402, it determines that the first UL grant is the UL grant scheduled in the RAR, and then performs IDT transmission using the UL grant scheduled in the RAR.
If the terminal selects the IDT resource based on the 2-step random access in step 402, it determines that the first UL grant is the UL grant determined by the PUSCH resource associated with the preamble, and then performs IDT transmission by the UL grant determined by the PUSCH resource associated with the selected preamble.
If the terminal selects the preconfigured resources for IDT transmission in step 402, it determines that the first UL grant is the UL grant determined by the preconfigured resources, and then performs IDT transmission by the UL grant determined by the preconfigured resources.
Step 404, according to the first UL grant, performing logical channel priority processing on the first data to multiplex the first data to a first MAC PDU.
The first data is data from a first type logical channel in data to be sent of the terminal; the first type logical channel is a logical channel that can trigger an IDT; that is, the first data is the IDT data.
In this embodiment, the terminal first performs LCP processing on the first data according to the first UL grant to pad the first data in the first MAC PDU. Wherein the size of the first MAC PDU is determined by the first UL grant.
Wherein, the first MAC PDU includes a medium access control layer control element BSR MAC CE carrying a buffer status report.
Wherein, the first MAC PDU also comprises a MAC header.
Step 405, when there are remaining bits in the first MAC PDU, performing logical channel priority processing on the second data to multiplex the second data to the first MAC PDU.
The second data is data from a second type logical channel in the data to be sent; the second type of logical channel is a logical channel of a non-triggerable IDT; that is, the first data is the Non-IDT data described above.
In the embodiment of the present application, after the IDT data is completely filled into the first MAC PDU, if there are remaining bits in the first MAC PDU, the Non-IDT data is filled into the first MAC PDU continuously according to the LCP processing method.
In one possible implementation manner, when the remaining bits exist in the first MAC PDU and the logical channel priority of the second data is higher than the logical channel priority of the first data, the terminal performs logical channel priority processing on the second data to multiplex the second data to the first MAC PDU.
In a possible implementation manner of the embodiment of the application, after the IDT data is completely filled into the first MAC PDU, if the first MAC PDU has remaining bits, the terminal further compares priorities of a logical channel of the IDT data and a logical channel of the Non-IDT data, and if the priority of the logical channel of the Non-IDT data is higher than the priority of the logical channel of the IDT data, it indicates that the Non-IDT data is data with a higher priority, and at this time, the Non-IDT data with a higher priority is transmitted through the remaining bits in the first MAC PDU.
In one possible implementation, when there are remaining bits in the first MAC PDU and the first priority is higher than the second priority, performing logical channel priority processing on the second data to multiplex the second data to the first MAC PDU;
wherein the first priority is the priority of the logical channel with the highest priority among the logical channels corresponding to the second data; the second priority is a priority of a logical channel with a highest priority among logical channels corresponding to the first data.
In one possible implementation, when there are remaining bits in the first MAC PDU, performing logical channel priority processing on first target data in the second data to multiplex the first target data to the first MAC PDU;
the first target data is data of a logical channel with a priority higher than a second priority in the logical channels corresponding to the second data; the second priority is a priority of a logical channel with a highest priority among logical channels corresponding to the first data.
In one possible implementation, when there are remaining bits in the first MAC PDU and the logical channel priority of the second data is higher than a designated priority, the terminal performs logical channel priority processing on the second data to multiplex the second data to the first MAC PDU.
In another possible implementation, the terminal may also set a designated priority to determine Non-IDT data that needs to be transmitted through the remaining bits in the first MAC PDU. That is, after the IDT data is completely filled in the first MAC PDU, if the first MAC PDU has remaining bits, the terminal further compares the priority of the logical channel of the IDT data with the designated priority, and if the priority of the logical channel of the Non-IDT data is higher than the designated priority, it indicates that the Non-IDT data is data with higher priority, and at this time, the Non-IDT data with higher priority is transmitted through the remaining bits in the first MAC PDU.
In one possible implementation, when there are remaining bits in the first MAC PDU and the logical channel priority of the second data is not higher than the logical channel priority of the first data, or the logical channel priority of the second data is not higher than a designated priority, the terminal fills the remaining bits in the first MAC PDU with padding bits (padding).
In another possible implementation, padding bits are added to the remaining bits of the first MAC PDU when the remaining bits are present in the first MAC PDU.
Step 406, based on the first MAC PDU, performing uplink data transmission to the network side device.
And after the first MAC PDU is filled, the terminal sends uplink data to the network side equipment based on the first MAC PDU.
For example, when the target IDT resource selected by the terminal is an IDT resource based on 4-step/2-step random access, the terminal performs uplink data transmission through a random access message (Msg 3/Msg a).
Or, when the target IDT resource selected by the terminal is a pre-configured resource for IDT transmission, the terminal performs uplink data transmission via the pre-configured resource.
Step 407, the network side device returns scheduling information to the terminal, and correspondingly, the terminal receives the scheduling information returned by the network side device.
In a possible implementation manner, the network side device sends the scheduling information through the C-RNTI.
In the embodiment of the application, the network side device determines whether to restore the terminal to the connected state or to continue to schedule uplink transmission in the INACTIVE state through the C-RNTI according to the BSR reported by the terminal (carried by the BSR MAC CE in the first MAC PDU). And returning scheduling information to the network side equipment according to the judgment result.
In step 408, when the scheduling information indicates that the terminal continues to transmit the IDT data, the terminal determines a second UL grant according to the scheduling information.
In the embodiment of the application, the second UL grant is scheduled by the network side device through the C-RNTI.
Step 409, the terminal performs logical channel priority processing on the remaining data to be sent of the terminal according to the second UL grant, so as to multiplex the remaining data to be sent to the second MAC PDU.
In a possible implementation manner, the terminal performs logical channel priority processing on third data according to the second UL grant, so as to multiplex the third data to the second MAC PDU; the third data is data from the first type logical channel in the remaining data to be transmitted;
in one possible implementation, when there are remaining bits in the second MAC PDU, performing logical channel priority processing on fourth data to multiplex the fourth data to the second MAC PDU; the fourth data is data from the second type logical channel among the remaining data to be transmitted.
In one possible implementation, when there are remaining bits in the second MAC PDU and the logical channel priority of the fourth data is higher than the logical channel priority of the third data, the logical channel priority processing is performed on the fourth data to multiplex the fourth data to the second MAC PDU.
In a possible implementation manner, when the second MAC PDU has remaining bits and the third priority is higher than the fourth priority, performing logical channel priority processing on the fourth data to multiplex the fourth data to the second MAC PDU;
wherein, the third priority is the priority of the logical channel with the highest priority in the logical channels corresponding to the fourth data; the fourth priority is a priority of a logical channel with a highest priority among logical channels corresponding to the third data.
In one possible implementation, when there are remaining bits in the second MAC PDU, performing logical channel priority processing on second target data in the fourth data to multiplex the second target data to the second MAC PDU;
the second target data is data of a logical channel with a priority higher than a fourth priority in the logical channels corresponding to the fourth data; the fourth priority is a priority of a logical channel with a highest priority among logical channels corresponding to the third data.
In one possible implementation, padding bits are added to remaining bits of the second MAC PDU when the remaining bits are present in the second MAC PDU.
In an exemplary scheme of the embodiment of the present application, when the network side device schedules the terminal to continue to perform uplink transmission in the inactive state, in the subsequent uplink transmission process, the terminal assembles the MAC PDU according to a scheme similar to the above-mentioned step 404 and step 405, that is, fills IDT data first, and fills Non-IDT data if there are remaining bits.
In a possible implementation manner, the terminal performs, according to the second UL grant, a logical channel priority process on all the remaining data to be transmitted uniformly, so as to multiplex the remaining data to be transmitted to the second MAC PDU.
In an exemplary scheme of the embodiment of the present application, when a network-side device schedules a terminal to continue uplink transmission in an inactive state, in a subsequent uplink transmission process, the terminal does not distinguish IDT data from non-IDT data, but multiplexes all data to be transmitted to a MAC PDU in an LCP processing manner.
Step 410, the terminal performs uplink data transmission to the network side device based on the second MAC PDU.
In a possible implementation manner, the terminal performs uplink data transmission based on the second MAC PDU on the resource scheduled by the network side device through the scheduling information.
To sum up, according to the scheme shown in the embodiment of the present application, when the terminal is in the RRC inactive state, if the inactive transmission condition is satisfied, the data from the logical channel of the triggerable IDT is filled into the MAC PDU corresponding to the UL grant in the LCP mode, if the data from the logical channel of the triggerable IDT has remaining bits after the data filling is completed, and then the data from the logical channel of the non-triggerable IDT is filled into the MAC PDU in the LCP mode, so that a feasible scheme for implementing LCP processing by using the UL grant to construct the MAC PDU is provided, thereby implementing uplink data transmission in the inactive state, and when there is no data to be transmitted, the RRC connection is recovered or established, thereby saving power consumption and signaling resources.
In addition, in the solution shown in the embodiment of the present application, the terminal fills the MAC PDU with the data from the logical channel of the triggerable IDT first, and if the MAC PDU has remaining bits after the filling, then continues to fill the data from the logical channel of the non-triggerable IDT, and under the condition that it is ensured that the data that needs to be transmitted through the IDT is preferentially transmitted, the remaining resources can be used to transmit other data, thereby improving the utilization rate of the wireless resources.
Please refer to fig. 5, which is a schematic diagram illustrating an IDT transmission flow according to an embodiment of the present application. As shown in fig. 5, taking the network side device as a base station as an example, in the scheme shown in fig. 4, the IDT transmission procedure between the terminal and the base station is as follows:
s51, the terminal transmits IDT data to the base station through a random access message (Msg 3/Msg A) and detects a competition resolving message returned by the base station. Alternatively, the terminal transmits IDT data to the base station through CG resources S52.
And S53, the base station schedules the UL grant which is continuously transmitted in the inactive state for the terminal through the C-RNTI.
And S54, the terminal carries out subsequent uplink transmission through the UL grant scheduled by the base station.
And S55, releasing the RRC connection.
In the above scheme of the embodiment of the present application, when the terminal establishes the MAC PDU, the IDT data and the Non-IDT data are processed in an LCP manner based on the UL grant.
Please refer to fig. 6, which illustrates an uplink transmission diagram according to an embodiment of the present application. As shown in fig. 6, in the IDT process, IDT data is preferentially multiplexed only in the UL grant determined by the PUSCH resource/CG resource associated with the RAR/preamble, and the uplink transmission process is as follows:
the IDT related parameters configured by the network side device for the terminal are assumed as follows:
a) The logical channels that can trigger the IDT are logical channel #1 and logical channel #2;
b) IDT resources based on 4-step random access, and/or IDT resources based on 2-step random access, and/or CG resources for IDT;
c) The IDT triggers the condition.
And S61, the terminal meets IDT triggering conditions and determines the UL grant through IDT resources (PUSCH resources/CG resources associated with RAR/preamble).
In multiplexing and building MAC PDU, the terminal first selects and multiplexes the IDT data in the logical channel triggering IDT, such as logical channel #1 and/or logical system channel # 2. Assuming that the UL grant size is 2000bits, 1500bits are required for IDT data + MAC header + BSR MAC CE.
For the remaining capacity (500 bits), the terminal is padded with Non-IDT data S63. There are two alternatives to this filling process:
a) If the Non-IDT data exists, multiplexing part/all of the Non-IDT data by using the residual bit according to the logic channel priority corresponding to the Non-IDT data, or else, padding bits;
b) If the Non-IDT data exists and the logic channel priority corresponding to the Non-IDT data is higher than that of the triggered IDT, multiplexing part/all of the Non-IDT data by using the rest bits, otherwise, padding bits.
And S64, if the network side equipment continues to schedule the terminal to transmit data in an RRC _ INACTIVE state through the C-RNTI according to the BSR reported by the terminal, the terminal does not distinguish whether the current data to be transmitted is IDT data, and multiplexes all the data to be transmitted and builds MAC PDU.
The advantage of this scheme is that after the IDT data transmission is completed, the uplink resources scheduled by the C-RNTI can be fully utilized to deliver data with higher priority to the network, for example, the priority of the logical channel triggering the IDT is lower than the priority of the logical channel not triggering the IDT.
Please refer to fig. 7, which illustrates another uplink transmission diagram according to an embodiment of the present application. As shown in fig. 7, in the IDT procedure, IDT data needs to be preferentially multiplexed without distinguishing the determination method of the UL grant, and the uplink transmission procedure is as follows:
the IDT related parameters configured for the terminal by the network side device are assumed as follows:
a) The logical channels that can trigger the IDT are logical channel #1 and logical channel #2;
b) IDT resources based on 4-step random access, and/or IDT resources based on 2-step random access, and/or CG resources for IDT
c) An IDT trigger condition;
s71 to S73 are similar to steps S61 to S63, and are not described herein again.
And S74, if the network side equipment schedules the UL grant through the C-RNTI according to the BSR reported by the terminal, indicating the terminal to continue transmitting data in the RRC _ INACTIVE state. When multiplexing and building the MAC PDU, the terminal preferentially selects the IDT logical channel having data waiting to be transmitted, such as logical channel #1, and/or IDT data in logical system channel #2 for multiplexing. The UL grant size is 1000bits, and the IDT pending data + MAC header + BSR MAC CE needs 800bits.
S75, for the remaining capacity (200 bits), the terminal selects the same scheme as in step S63/S73.
The advantage of this scheme is that in the IDT flow, it is always guaranteed that data from logical channels that can trigger IDTs can be transmitted with priority, and Non-IDTs have lower priority or are not allowed to transmit Non-IDT data in the IDT flow.
The following are embodiments of the apparatus of the present application that may be used to perform embodiments of the method of the present application. For details which are not disclosed in the embodiments of the apparatus of the present application, reference is made to the embodiments of the method of the present application.
Please refer to fig. 8, which shows a block diagram of an uplink data transmission apparatus according to an embodiment of the present application. The device has the function of realizing the uplink data transmission method. As shown in fig. 8, the apparatus may include:
a first uplink grant determining module 801, configured to determine a first uplink scheduling grant UL grant according to a target IDT resource when a terminal is in an RRC inactive state and an IDT condition for inactive data transmission is met;
a first data processing module 802, configured to perform logical channel priority processing on first data according to the first UL grant, so as to multiplex the first data to a first MAC PDU; the first data is data from a first type logic channel in the data to be sent of the terminal; the first type logical channel is a logical channel of a triggerable IDT;
a first uplink data transmission module 803, configured to perform uplink data transmission to the network side device based on the first MAC PDU.
In one possible implementation, the apparatus further includes:
a second data processing module, configured to perform logical channel priority processing on second data to multiplex the second data to the first MAC PDU when there are remaining bits in the first MAC PDU; the second data is data from a second type logical channel in the data to be sent; the second type of logical channel is a logical channel of a non-triggerable IDT;
in a possible implementation manner, the second data processing module 803 is configured to perform logical channel priority processing on the second data to multiplex the second data to the first MAC PDU when there are remaining bits in the first MAC PDU and a logical channel priority of the second data is higher than a logical channel priority of the first data.
In a possible implementation manner, the second data processing module is configured to perform logical channel priority processing on the second data to multiplex the second data to the first MAC PDU when there are remaining bits in the first MAC PDU and a first priority is higher than a second priority;
wherein the first priority is the priority of the logical channel with the highest priority in the logical channels corresponding to the second data; the second priority is a priority of a logical channel with a highest priority among logical channels corresponding to the first data.
In a possible implementation manner, the second data processing module is configured to perform logical channel priority processing on first target data in the second data to multiplex the first target data to the first MAC PDU when there are remaining bits in the first MAC PDU;
wherein the first target data is data of a logical channel with a higher priority than a second priority in the logical channels corresponding to the second data; the second priority is a priority of a logical channel with a highest priority among logical channels corresponding to the first data.
In one possible implementation, the apparatus further includes:
a first padding bit adding module, configured to add padding bits to remaining bits of the first MAC PDU when the remaining bits exist in the first MAC PDU.
In one possible implementation, the apparatus further includes:
an IDT resource determining module, configured to determine, according to an IDT triggering condition, a target IDT resource from IDT resources configured in advance; the preconfigured IDT resources include at least one of the following IDT resources:
based on IDT resources accessed randomly in the 4 steps;
based on the ID resource of the 2-step random access;
and, pre-configured resources for IDT transmission.
In one possible implementation, the apparatus further includes:
a configuration information receiving module, configured to receive configuration information issued by the network side device, where the configuration information is used to indicate at least one of the following information:
the first type logical channel, the IDT trigger condition, and preconfigured IDT resources.
In one possible implementation, the apparatus further includes:
a second uplink grant determining module, configured to determine a second UL grant according to scheduling information when the scheduling information sent by the network side device through the cell radio network temporary identifier C-RNTI is received and the scheduling information indicates the terminal to continue to perform IDT data retransmission;
a remaining data processing module, configured to perform logical channel priority processing on remaining data to be sent of the terminal according to the second UL grant, so as to multiplex the remaining data to be sent to a second MAC PDU;
and the second uplink data transmission module is used for transmitting uplink data to the network side equipment based on the second MAC PDU.
In one possible implementation, the remaining data processing module includes:
a third data processing unit, configured to perform logical channel priority processing on third data according to the second UL grant, so as to multiplex the third data to the second MAC PDU; the third data is data from the first type logical channel in the remaining data to be transmitted;
in one possible implementation, the remaining data processing module includes:
a fourth data processing unit, configured to perform logical channel priority processing on fourth data when there are remaining bits in the second MAC PDU, so as to multiplex the fourth data to the second MAC PDU; the fourth data is data from the second type logical channel in the remaining data to be transmitted.
In a possible implementation manner, the fourth data processing unit is configured to perform logical channel priority processing on the fourth data to multiplex the fourth data to the second MAC PDU when there are remaining bits in the second MAC PDU and a logical channel priority of the fourth data is higher than a logical channel priority of the third data.
In a possible implementation manner, the fourth data processing unit is configured to perform logical channel priority processing on the fourth data to multiplex the fourth data to the second MAC PDU when there are remaining bits in the second MAC PDU and a third priority is higher than a fourth priority;
wherein the third priority is a priority of a logical channel with a highest priority among logical channels corresponding to the fourth data; the fourth priority is a priority of a logical channel with a highest priority among logical channels corresponding to the third data.
In a possible implementation manner, the fourth data processing unit is configured to perform logical channel priority processing on second target data in the fourth data when there are remaining bits in the second MAC PDU, so as to multiplex the second target data to the second MAC PDU;
wherein the second target data is data of a logical channel with a priority higher than a fourth priority in the logical channels corresponding to the fourth data; the fourth priority is a priority of a logical channel with a highest priority among logical channels corresponding to the third data.
In one possible implementation, the apparatus further includes:
a second padding bit adding module, configured to add padding bits to remaining bits of the second MAC PDU when the remaining bits exist in the second MAC PDU.
In a possible implementation manner, the remaining data processing module is configured to perform, according to the second UL grant, a logical channel priority process on all the remaining data to be sent in a unified manner, so as to multiplex the remaining data to be sent to the second MAC PDU.
In a possible implementation manner, the first MAC PDU includes a MAC layer control element carrying a buffer status report.
To sum up, according to the scheme shown in the embodiment of the present application, when the terminal is in the RRC inactive state, if the inactive transmission condition is satisfied, the data from the logical channel of the triggerable IDT is filled into the MAC PDU corresponding to the UL grant in the LCP mode, if the data from the logical channel of the triggerable IDT has remaining bits after the data filling is completed, and then the data from the logical channel of the non-triggerable IDT is filled into the MAC PDU in the LCP mode, so that a feasible scheme for implementing LCP processing by using the UL grant to construct the MAC PDU is provided, thereby implementing uplink data transmission in the inactive state, and when there is no data to be transmitted, the RRC connection is recovered or established, thereby saving power consumption and signaling resources.
In addition, in the solution shown in the embodiment of the present application, the terminal fills the MAC PDU with the data from the logical channel of the triggerable IDT first, and if the MAC PDU has remaining bits after the filling, then continues to fill the data from the logical channel of the non-triggerable IDT, and under the condition that it is ensured that the data that needs to be transmitted through the IDT is preferentially transmitted, the remaining resources can be used to transmit other data, thereby improving the utilization rate of the wireless resources.
It should be noted that, when the apparatus provided in the foregoing embodiment implements the functions thereof, only the division of the above functional modules is illustrated, and in practical applications, the above functions may be distributed by different functional modules according to actual needs, that is, the content structure of the device is divided into different functional modules, so as to complete all or part of the functions described above.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Referring to fig. 9, a schematic structural diagram of a computer device 900 according to an embodiment of the present application is shown. The computer device 900 may include: a processor 901, a receiver 902, a transmitter 903, a memory 904, and a bus 905.
The processor 901 includes one or more processing cores, and the processor 901 executes various functional applications and information processing by executing software programs and modules.
The receiver 902 and the transmitter 903 may be implemented as one communication component, which may be a communication chip. The communication chip may also be referred to as a transceiver.
The memory 904 is coupled to the processor 901 via a bus 905.
The memory 904 may be configured to store a computer program, and the processor 901 is configured to execute the computer program to implement the steps performed by the server device, the configuration device, the cloud platform, or the account server in the foregoing method embodiments.
Further, memory 904 may be implemented by any type or combination of volatile or non-volatile storage devices, including, but not limited to: magnetic or optical disks, electrically erasable programmable read-only memories, static random access memories, read-only memories, magnetic memories, flash memories, programmable read-only memories.
In an exemplary embodiment, the computer device includes a processor, a memory, and a transceiver (which may include a receiver for receiving information and a transmitter for transmitting information);
in one possible implementation, when the computer device is implemented as a terminal, the terminal includes a processor, a memory, and a transceiver;
the processor is used for determining a first uplink scheduling grant (UL grant) according to a target IDT resource when the terminal is in a Radio Resource Control (RRC) inactive state and meets an IDT condition of inactive data transmission;
the processor is configured to perform logical channel priority processing on first data according to the first UL grant, so as to multiplex the first data to a first medium access control protocol data unit (MAC PDU); the first data is data from a first type logic channel in the data to be sent of the terminal; the first type logical channel is a logical channel of a triggerable IDT;
and the transceiver is used for transmitting uplink data to network side equipment based on the first MAC PDU.
The processor and the transceiver in the terminal according to the embodiment of the present application may execute the steps executed by the terminal in the method shown in fig. 2 or fig. 4, which are not described herein again.
An embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored in the storage medium, and the computer program is loaded and executed by a processor to implement each step in the uplink data transmission method shown in fig. 2 or fig. 4.
The present application also provides a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions, so that the computer device executes the steps in the uplink data transmission method shown in fig. 2 or fig. 4.
Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in the embodiments of the present application may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
The above description is only exemplary of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like that are made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (38)

  1. An uplink data transmission method, the method comprising:
    when the terminal is in a Radio Resource Control (RRC) inactive state and meets an IDT condition of inactive data transmission, determining a first uplink scheduling grant (UL grant) according to a target IDT resource;
    performing logical channel priority processing on first data according to the first UL grant to multiplex the first data to a first media access control protocol data unit (MAC PDU); the first data is data from a first type logic channel in the data to be sent of the terminal; the first type logical channel is a logical channel of a triggerable IDT;
    and transmitting uplink data to the network side equipment based on the first MAC PDU.
  2. The method of claim 1, further comprising:
    when the first MAC PDU has residual bits, performing logic channel priority processing on second data to multiplex the second data to the first MAC PDU; the second data is data from a second type logical channel in the data to be sent; the second type of logical channel is a logical channel of a non-triggerable IDT.
  3. The method of claim 2, wherein performing logical channel prioritization on second data to multiplex the second data to the first MAC PDU when there are remaining bits in the first MAC PDU comprises:
    and when the first MAC PDU has residual bits and the logical channel priority of the second data is higher than that of the first data, performing logical channel priority processing on the second data so as to multiplex the second data to the first MAC PDU.
  4. The method of claim 3, wherein when there are bits remaining in the first MAC PDU and the logical channel priority of the second data is higher than the logical channel priority of the first data, logically prioritizing the second data for multiplexing the second data into the first MAC PDU comprises:
    when the first MAC PDU has residual bits and the first priority is higher than the second priority, performing logic channel priority processing on the second data to multiplex the second data to the first MAC PDU;
    wherein the first priority is the priority of the logical channel with the highest priority in the logical channels corresponding to the second data; the second priority is a priority of a logical channel with a highest priority among logical channels corresponding to the first data.
  5. The method of claim 3, wherein when there are bits remaining in the first MAC PDU and the logical channel priority of the second data is higher than the logical channel priority of the first data, logically prioritizing the second data for multiplexing the second data into the first MAC PDU comprises:
    when the first MAC PDU has residual bits, performing logic channel priority processing on first target data in the second data to multiplex the first target data to the first MAC PDU;
    wherein the first target data is data of a logical channel with a higher priority than a second priority in the logical channels corresponding to the second data; the second priority is a priority of a logical channel with a highest priority among logical channels corresponding to the first data.
  6. The method of claim 1, further comprising:
    adding padding bits on remaining bits of the first MAC PDU when the remaining bits are present in the first MAC PDU.
  7. The method of claim 1, further comprising:
    determining the target IDT resources from the preset IDT resources according to the IDT triggering conditions; the preconfigured IDT resources include at least one of the following IDT resources:
    based on IDT resources accessed randomly in the 4 steps;
    based on the ID resource of the 2-step random access;
    and, pre-configured resources for IDT transmission.
  8. The method of claim 1, further comprising:
    receiving configuration information issued by the network side device, wherein the configuration information is used for indicating at least one of the following information:
    the first type logical channel, the IDT trigger condition, and preconfigured IDT resources.
  9. The method according to claim 5, wherein the receiving the configuration information sent by the network side device includes:
    receiving the configuration information issued by the network side equipment through a designated signaling;
    the specific signaling includes at least one of broadcast signaling and dedicated signaling.
  10. The method according to any one of claims 1 to 9, further comprising:
    when scheduling information sent by the network side equipment through a cell radio network temporary identifier (C-RNTI) is received and the scheduling information indicates the terminal to continue to transmit the IDT data, determining a second UL grant according to the scheduling information;
    performing logic channel priority processing on the remaining data to be sent of the terminal according to the second UL grant so as to multiplex the remaining data to be sent to a second MAC PDU;
    and transmitting uplink data to the network side equipment based on the second MAC PDU.
  11. The method of claim 10, wherein the performing logical channel prioritization on remaining data to be sent for the terminal according to the second UL grant to multiplex the remaining data to be sent to a second MAC PDU comprises:
    performing logical channel priority processing on third data according to the second UL grant to multiplex the third data to the second MAC PDU; the third data is data from the first type logical channel in the remaining data to be transmitted.
  12. The method of claim 11, further comprising:
    when the second MAC PDU has residual bits, performing logic channel priority processing on fourth data to multiplex the fourth data to the second MAC PDU; the fourth data is data from the second type logical channel in the remaining data to be transmitted.
  13. The method of claim 12, wherein the logically prioritizing fourth data for multiplexing the fourth data to the second MAC PDU when there are remaining bits in the second MAC PDU comprises:
    and when the second MAC PDU has residual bits and the logical channel priority of the fourth data is higher than that of the third data, performing logical channel priority processing on the fourth data to multiplex the fourth data to the second MAC PDU.
  14. The method of claim 13, wherein when there are remaining bits in the second MAC PDU and the logical channel priority of the fourth data is higher than the logical channel priority of the third data, logically prioritizing the fourth data for multiplexing the fourth data to the second MAC PDU comprises:
    when the second MAC PDU has residual bits and the third priority is higher than the fourth priority, performing logic channel priority processing on the fourth data to multiplex the fourth data to the second MAC PDU;
    wherein the third priority is a priority of a logical channel with a highest priority among logical channels corresponding to the fourth data; the fourth priority is a priority of a logical channel with a highest priority among logical channels corresponding to the third data.
  15. The method of claim 13, wherein when there are remaining bits in the second MAC PDU and the logical channel priority of the fourth data is higher than the logical channel priority of the third data, logically prioritizing the fourth data for multiplexing the fourth data to the second MAC PDU comprises:
    when the second MAC PDU has residual bits, performing logical channel priority processing on second target data in the fourth data to multiplex the second target data to the second MAC PDU;
    wherein the second target data is data of a logical channel with a priority higher than a fourth priority in the logical channels corresponding to the fourth data; the fourth priority is a priority of a logical channel with a highest priority among logical channels corresponding to the third data.
  16. The method of claim 11, further comprising:
    adding padding bits to remaining bits of the second MAC PDU when the remaining bits are present in the second MAC PDU.
  17. The method of claim 10, wherein the performing logical channel prioritization on the remaining data to be transmitted of the terminal according to the second UL grant to multiplex the remaining data to be transmitted to a second MAC PDU comprises:
    and according to the second UL grant, uniformly performing logic channel priority processing on all the remaining data to be sent so as to multiplex the remaining data to be sent to the second MAC PDU.
  18. The method according to any of claims 1 to 9, wherein the first MAC PDU comprises a MAC layer control element carrying a buffer status report.
  19. An uplink data transmission apparatus, comprising:
    a first uplink grant determining module, configured to determine a first uplink scheduling grant UL grant according to a target IDT resource when a terminal is in an RRC inactive state and an IDT condition for inactive data transmission is met;
    a first data processing module, configured to perform logical channel priority processing on first data according to the first UL grant, so as to multiplex the first data to a first MAC PDU; the first data is data from a first type logic channel in the data to be sent of the terminal; the first type logical channel is a logical channel of a triggerable IDT;
    and the first uplink data transmission module is used for transmitting uplink data to the network side equipment based on the first MAC PDU.
  20. The apparatus of claim 19, further comprising:
    a second data processing module, configured to perform logical channel priority processing on second data to multiplex the second data to the first MAC PDU when there are remaining bits in the first MAC PDU; the second data is data from a second type logical channel in the data to be sent; the second type of logical channel is a logical channel of a non-triggerable IDT.
  21. The apparatus of claim 20,
    the second data processing module is configured to perform logical channel priority processing on the second data to multiplex the second data to the first MAC PDU when there are remaining bits in the first MAC PDU and a logical channel priority of the second data is higher than a logical channel priority of the first data.
  22. The apparatus of claim 21,
    the second data processing module is configured to perform logical channel priority processing on the second data to multiplex the second data to the first MAC PDU when the first MAC PDU has remaining bits and the first priority is higher than the second priority;
    wherein the first priority is the priority of the logical channel with the highest priority in the logical channels corresponding to the second data; the second priority is a priority of a logical channel with a highest priority among logical channels corresponding to the first data.
  23. The apparatus of claim 21,
    the second data processing module is configured to perform logical channel priority processing on first target data in the second data to multiplex the first target data to the first MAC PDU when there are remaining bits in the first MAC PDU;
    wherein the first target data is data of a logical channel with a higher priority than a second priority in the logical channels corresponding to the second data; the second priority is a priority of a logical channel with a highest priority among logical channels corresponding to the first data.
  24. The apparatus of claim 19, further comprising:
    a first padding bit adding module, configured to add padding bits to remaining bits of the first MAC PDU when the remaining bits exist in the first MAC PDU.
  25. The apparatus of claim 19, further comprising:
    an IDT resource determining module, configured to determine, according to an IDT triggering condition, a target IDT resource from IDT resources configured in advance; the preconfigured IDT resources include at least one of the following IDT resources:
    based on IDT resources accessed randomly in the 4 steps;
    based on the ID resource of the 2-step random access;
    and, pre-configured resources for IDT transmission.
  26. The apparatus of claim 19, further comprising:
    a configuration information receiving module, configured to receive configuration information issued by the network side device, where the configuration information is used to indicate at least one of the following information:
    the first type logical channel, the IDT trigger condition, and preconfigured IDT resources.
  27. The apparatus of claim 26,
    the configuration information receiving module is configured to receive the configuration information issued by the network side device through a designated signaling;
    the specific signaling includes at least one of broadcast signaling and dedicated signaling.
  28. The apparatus of any one of claims 19-27, further comprising:
    a second uplink grant determining module, configured to determine a second UL grant according to scheduling information when the scheduling information sent by the network side device through the cell radio network temporary identifier C-RNTI is received and the scheduling information indicates the terminal to continue to perform IDT data retransmission;
    a remaining data processing module, configured to perform logical channel priority processing on remaining data to be sent of the terminal according to the second UL grant, so as to multiplex the remaining data to be sent to a second MAC PDU;
    and the second uplink data transmission module is used for transmitting uplink data to the network side equipment based on the second MAC PDU.
  29. The apparatus of claim 28, wherein the remaining data processing module comprises:
    a third data processing unit, configured to perform logical channel priority processing on third data according to the second UL grant, so as to multiplex the third data to the second MAC PDU; the third data is data from the first type logical channel in the remaining data to be transmitted.
  30. The apparatus of claim 28, wherein the remaining data processing module comprises:
    a fourth data processing unit, configured to perform logical channel priority processing on fourth data to multiplex the fourth data to the second MAC PDU when there are remaining bits in the second MAC PDU; the fourth data is data from the second type logical channel in the remaining data to be transmitted.
  31. The apparatus of claim 30,
    the fourth data processing unit is configured to perform logical channel priority processing on the fourth data to multiplex the fourth data to the second MAC PDU when there are remaining bits in the second MAC PDU and a logical channel priority of the fourth data is higher than a logical channel priority of the third data.
  32. The apparatus of claim 31,
    the fourth data processing unit is configured to perform logical channel priority processing on the fourth data to multiplex the fourth data to the second MAC PDU when the second MAC PDU has remaining bits and a third priority is higher than a fourth priority;
    wherein the third priority is a priority of a logical channel with a highest priority among logical channels corresponding to the fourth data; the fourth priority is a priority of a logical channel with a highest priority among logical channels corresponding to the third data.
  33. The apparatus of claim 31,
    the fourth data processing unit is configured to perform logical channel priority processing on second target data in the fourth data to multiplex the second target data to the second MAC PDU when there are remaining bits in the second MAC PDU;
    the second target data is data of a logical channel with a priority higher than a fourth priority in the logical channels corresponding to the fourth data; the fourth priority is a priority of a logical channel with a highest priority among logical channels corresponding to the third data.
  34. The apparatus of claim 29, further comprising:
    a second padding bit adding module, configured to add padding bits to remaining bits of the second MAC PDU when the remaining bits exist in the second MAC PDU.
  35. The apparatus of claim 28,
    and the remaining data processing module is configured to perform, according to the second UL grant, logical channel priority processing on all remaining data to be sent in a unified manner, so as to multiplex the remaining data to be sent to the second MAC PDU.
  36. The apparatus of any of claims 19-27, wherein the first MAC PDU comprises a MAC layer control element that carries a buffer status report.
  37. A terminal, characterized in that the terminal comprises a processor, a memory and a transceiver;
    the processor is used for determining a first uplink scheduling grant (UL grant) according to a target IDT resource when the terminal is in a Radio Resource Control (RRC) inactive state and meets an IDT condition of inactive data transmission;
    the processor is configured to perform logical channel priority processing on first data according to the first UL grant, so as to multiplex the first data to a first medium access control protocol data unit (MAC PDU); the first data is data from a first type logic channel in the data to be sent of the terminal; the first type logical channel is a logical channel of a triggerable IDT;
    and the transceiver is used for transmitting uplink data to network side equipment based on the first MAC PDU.
  38. A computer-readable storage medium, in which a computer program is stored, the computer program being configured to be executed by a processor to implement the uplink data transmission method according to any one of claims 1 to 18.
CN202080101130.8A 2020-07-10 2020-07-10 Uplink data transmission method, device, terminal and storage medium Pending CN115669149A (en)

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CN108012332B (en) * 2016-11-01 2021-01-15 华为技术有限公司 Resource allocation method and terminal
US10499448B2 (en) * 2017-02-03 2019-12-03 Motorola Mobility Llc Configuration information for an inactive state
US10397833B2 (en) * 2017-07-27 2019-08-27 Lg Electronics Inc. Method and apparatus for performing EDT
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