CN114666913A - Method executed by user equipment and user equipment - Google Patents

Method executed by user equipment and user equipment Download PDF

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Publication number
CN114666913A
CN114666913A CN202011555889.1A CN202011555889A CN114666913A CN 114666913 A CN114666913 A CN 114666913A CN 202011555889 A CN202011555889 A CN 202011555889A CN 114666913 A CN114666913 A CN 114666913A
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China
Prior art keywords
sdt
bsr
logical channel
mac
user equipment
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张崇铭
山田升平
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Sharp Corp
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Sharp Corp
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Priority to CN202011555889.1A priority Critical patent/CN114666913A/en
Priority to PCT/CN2021/140770 priority patent/WO2022135513A1/en
Publication of CN114666913A publication Critical patent/CN114666913A/en
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    • 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
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a method executed by user equipment and the user equipment. The method executed by the user equipment is a control method when the UE has data arrival of DRB for Non SDT in the process of SDT, and comprises the following steps: the UE is in an inactive state, when uplink data of a certain logical channel can be acquired by an MAC entity, and the DRB to which the logical channel belongs is not configured with SDT or the logical channel is not configured with SDT, the UE triggers a Non SDT BSR; when the triggered Non SDT BSR exists and the UE has uplink resources, the UE indicates to generate a Non SDT BSR MAC CE and starts a Timer retx Non SDT BSR-Timer, wherein when the Non SDT BSR MAC CE is contained in the sent MAC PDU, the UE cancels the triggered Non SDT BSR.

Description

Method executed by user equipment and user equipment
Technical Field
The present invention relates to the field of wireless communication technology, and more particularly, to a method performed by a user equipment and a corresponding user equipment.
Background
In order to shorten transmission delay and save signaling overhead, a UE entering an RRC inactive state (RRC INACTIVE STATE) may send a Transport Block (Transport Block) with a predetermined size and carrying data on a Preconfigured Uplink Resource (PUR). This transmission mode may be referred to as PUR transmission. And in the process of random access, transmitting the transport block carrying the user data in the message III or the message A. Both of these transmission modes may be referred to as Small Data Transmission (SDT).
A Data Radio Bearer (DRB) that can be transmitted by using a small Data transmission manner is called DRB for SDT. A data radio bearer that is not allowed to transmit with small data transmission is called DRB for Non-SDT. The UE may have new data to arrive in the process of performing small data transmission, and such data may need to be transmitted via DRB for-SDT or may need to be transmitted via DRB for-SDT.
In the prior art, when uplink data of a certain logical channel can be acquired by the MAC entity, the UE may trigger a Buffer Status Report (BSR). When the DRB corresponding to this logical channel is configured with or without the SDT, how the UE needs to trigger generating the BSR is a problem to be solved.
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention provides a method performed by a user equipment and a user equipment.
According to an aspect of the present invention, there is provided a method performed by a user equipment, which is a control method for the user equipment UE to control when data of a data radio bearer DRB for Non SDT not based on small data transmission arrives during a process of performing small data transmission SDT, and the method includes the following steps:
the UE is in an inactive state, when uplink data of a certain logical channel can be acquired by an MAC entity, and the DRB to which the logical channel belongs is not configured with SDT or the logical channel is not configured with SDT, the UE triggers a Non-small data transmission buffer status report (Non SDT BSR);
when the triggered Non SDT BSR exists and the UE has uplink resources, the UE indicates to generate a Non SDT BSR MAC CE and starts a Timer retx Non SDT BSR-Timer, wherein when the Non SDT BSR MAC CE is contained in the sent MAC PDU, the UE cancels the triggered Non SDT BSR.
In the above-described method performed by the user equipment, it is preferable that,
the Non SDT BSR MAC CE may include one or more of the following:
the MAC subheader carries a specific Logical Channel Identifier (LCID) and is used for indicating the arrival of the data of the Non SDT;
a logical channel identifier, wherein the logical channel is a logical channel to which the arriving uplink data belongs;
a logical channel group identifier, where the logical channel group is a logical channel group to which a logical channel to which the arriving uplink data belongs;
and the buffer size is the uplink data amount which can be acquired and arrives in one logical channel or all the uplink data amounts which can be acquired in the logical channel group to which the logical channel belongs.
In the above-described method performed by the user equipment, it is preferable that,
when the Timer retx Non SDT BSR-Timer runs out of time, if a logical channel contains uplink data and the logical channel is not configured with SDT, the UE triggers Non SDTBSR.
In the method performed by the user equipment, it is preferable that the method further includes:
in the process of transmitting small data by UE, triggering BSR based on the data arrival of DRB for SDT;
when the UE has the triggered BSR and available uplink resources, the UE indicates to generate a BSR MAC CE and starts or restarts a Timer retxBSR-Timer, wherein when the BSR MAC CE is contained in the transmitted MAC PDU, the UE cancels the triggered BSR.
In the above-described method performed by the user equipment, it is preferable that,
when uplink data of a certain logical channel can be acquired by an MAC entity and when UE is in an inactive state, if the logical channel to which the data belongs is configured with SDT and the priority of the logical channel is higher than the priority of other existing logical channels capable of acquiring the uplink data, the UE triggers BSR;
when uplink data on a certain logical channel can be acquired by the MAC entity and when the UE is in an inactive state, if the logical channel to which the data belongs is configured with SDT and no other logical channel contains the uplink data that can be acquired, the UE triggers a BSR.
In the above-described method performed by the user equipment, it is preferable that,
when the Timer retxsrb-Timer runs out of time,
when the UE is in an inactive state, if there is a logical channel containing uplink data and the logical channel to which this data belongs is configured with SDT, the UE triggers a BSR.
In the above-described method performed by the user equipment, it is preferable that,
when the UE enters the connected state, if there is a running Timer retx non SDT BSR-Timer, the UE stops the Timer retx non SDT BSR-Timer.
In the above-described method performed by the user equipment, it is preferable that,
when the UE enters the connected state, the UE resets the MAC layer, and the operation of resetting the MAC layer at least comprises the operation that the UE stops the running Timer retx non SDT BSR-Timer.
In the above-described method performed by the user equipment, it is preferable that,
if the UE generates the MAC PDU and the Non SDT BSR MAC CE and the regular BSR MAC CE need to be multiplexed in one MAC PDU, the priority of the Non SDT BSR MAC CE is set to be higher than that of the regular BSR MAC CE.
According to another aspect of the present invention, there is provided a user equipment comprising:
a processor; and
a memory having instructions stored thereon,
the instructions, when executed by the processor, cause the user equipment to perform the method according to the above description.
According to the method executed by the user equipment and the corresponding user equipment, the transmission time delay can be shortened, and the signaling overhead can be saved.
Drawings
The above and other features of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which:
fig. 1 is a flow chart illustrating a method performed by a user equipment according to an embodiment of the present invention.
Fig. 2 is a block diagram showing a schematic configuration of a user equipment according to the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and the detailed description. It should be noted that the present invention should not be limited to the specific embodiments described below. In addition, for the sake of brevity, detailed descriptions of well-known technologies not directly related to the present invention are omitted to prevent confusion of understanding of the present invention.
Before describing in detail, several terms mentioned in the present invention will be explained as follows. Unless otherwise indicated, all terms referred to in the present invention have the following meanings.
UE User Equipment
NR New Radio New generation wireless technology
LTE Long Term Evolution (LTE) Long Term Evolution (Long Term Evolution) technology
eLTE enhanced Long Term Evolution technology
RRC Radio Resource Control (layer)
MAC Medium Access Control (layer)
MAC CE MAC Control Element
MAC PDU MAC Protocol Data Unit
Physical Uplink Shared Channel of PUSCH (Physical Uplink Shared Channel)
PDCCH Physical Downlink Control Channel
SDAP Service Data addition Protocol Service Data adaptive layer Protocol
PDCP Packet Data Convergence Protocol
RLC Radio Link Control, Radio Link layer Control protocol
Buffer Status Report (BSR) Buffer Status Report
DRB Data Radio Bearer
SDT Small Data Transmission
UL-SCH Uplink Shared Channel
In the following, an NR mobile communication system and its subsequent evolution are taken as an example application environment, and a base station and a UE device supporting NR are taken as an example, and a plurality of embodiments according to the present invention are specifically described. However, it should be noted that the present invention is not limited to the following embodiments, but is applicable to more other wireless communication systems, such as an LTE, communication system, or an NB-Iot system, or an LTE-M system. But also to other base stations and UE devices, such as those supporting LTE/NB-Iot/LTE-M.
A UE entering an RRC inactive state (RRC INACTIVE STATE) may send a Transport Block (Transport Block) of a predetermined size and carrying data on a Preconfigured Uplink Resource (PUR). This transmission mode may be referred to as PUR transmission. And in the process of random access, transmitting the transport block carrying the user data in the message III or the message A. Both of these transmission modes may be referred to as Small Data Transmission (SDT). Since such transmission is always performed in the inactive state, such transmission manner may also be referred to as data transmission of the UE in the inactive state.
A Data Radio Bearer (DRB) that can be transmitted by using a small Data transmission manner is called a DRB for SDT (Data radio bearer based on small Data transmission). Such DRBs may also be referred to as SDT configured DRBs.
A data radio bearer that is not allowed to transmit with the small data transmission scheme is called DRBfor Non-SDT (data radio bearer that is not based on small data transmission). Such DRBs may also be referred to as DRBs that are not configured with SDTs.
Each DRB corresponds to at least one Logical channel (Logical channel), and each Logical channel has its own Identity, which is also called Logical Channel Identity (LCID).
Correspondingly, the logical channel of the DRB configured with SDT may also be understood as a logical channel configured with SDT, or a logical channel supporting SDT (LC for SDT); the logical channels of the DRB not configured with SDT can also be understood as the logical channels not configured with SDT or the logical channels not supporting SDT (LC for non-SDT)
Data arrival
Data arrival means that the MAC entity (entity) may or may be able to acquire upstream data. Inside the UE, the MAC entity is responsible for assembling the uplink data into MAC PDUs. The data arriving here refers to data that the MAC entity can acquire and use for assembly. The MAC entity acquires uplink data from one or more logical channels. Thus, this situation may be understood to be for data arriving on a logical channel, or for the logical channel to contain upstream data. Each logical channel is associated with a PDCP entity and an RLC entity, or a logical channel is associated with a DRB in which the corresponding PDCP entity and RLC entity are included. How much data arrives is calculated. The total data amount that can be acquired is generally calculated in consideration of the data amounts of the PDCP layer and the RLC layer. The statistics are usually performed in units of logical channels or logical channel groups. Counting the data quantity that can be obtained by a logical channel means counting the data quantity of the PDCP layer and the RLC layer related to the logical channel; the statistics of the data amount that can be obtained by one logical channel group means to count the sum of the data amounts that can be obtained by all logical channels belonging to the logical channel group.
In the process of performing small data transmission, the UE may send only uplink data on the DRB for SDT. However, in the transmission process, data that needs to be transmitted via DRB for SDT may arrive, or data that needs to be transmitted via DRB for non-SDT may arrive.
When data arrives with DRB for Non SDT,
the UE may trigger a BSR when the priority of the logical channel to which the data belongs (say LC-1) is higher than the priority of the logical channel to which the data in DRB for SDT belongs (say LC-2). However, in the existing BSR design, the UE reports in units of Logical Channel Groups (LCGs). If LC-1 and LC-2 belong to the same logical channel group, the base station cannot distinguish whether the reported data belongs to LC-1 or LC-2 according to the BSR. I.e. it cannot recognize the arrival of data with DRB for non SDT.
When the priority of LC-1 is lower than LC-2, the UE does not trigger BSR.
It can be seen that, in the above case, the UE cannot report the data arrival of the DRB for Non SDT to the base station, thereby causing a delay in data transmission.
In addition, when the UE has data arrival of DRB for Non SDT in the process of performing small data transmission, the UE may re-trigger an RRC resume procedure. In this case, if the UE continues to report data arrival of DRB for Non SDT to the base station through BSR, it will become redundant.
In order to solve the problems mentioned in the background, several embodiments of the present invention are described in detail below.
Example one
The embodiment provides a control method for controlling data arrival of a DRB for Non SDT in a process of performing small data transmission SDT by a UE.
In order to avoid data transmission delay of DRB for Non SDT (data radio bearer not based on small data transmission), during the small data transmission process of the UE, if data of DRB for Non SDT arrives, a Non SDT BSR (Non-small data transmission buffer status report) may be triggered.
A specific embodiment may be, as shown in fig. 1, including:
step S101: when uplink data of a certain logical channel can be or can be acquired by the MAC entity (UL data available to the MAC entry), and the DRB to which the logical channel belongs is not configured with the SDT, or the logical channel is not configured with the SDT, the UE triggers the Non SDT BSR.
Step S102: when the triggered Non SDT BSR exists and the UE has uplink resources (UL-SCH resources are available), the UE indicates to generate the Non SDT BSR MAC CE and starts a Timer retx Non SDTBSR-Timer. When the Non SDT BSR MAC CE is included in the transmitted MAC PDU, the UE cancels the triggered Non SDT BSR.
The Non SDT BSR MAC CE herein may include one or more of the following:
-including a MAC subheader, which carries a specific logical channel identity LCID, for indicating the data arrival of Non SDT, or identifying the MAC CE as Non SDT BSR MAC CE;
-including a logical channel identifier, where the logical channel refers to a logical channel to which the arriving uplink data belongs, and preferably, the logical channel is a logical channel not configured with SDT;
-including a logical channel group identifier, where the logical channel group refers to a logical channel group to which a logical channel to which the arriving uplink data belongs, preferably, the logical channel is a logical channel to which SDT is not configured, and preferably, all logical channels belonging to the logical channel group are logical channels to which SDT is not configured, or the logical channel group does not include a logical channel to which SDT is configured;
the buffer size (buffer size) is included, where the buffer refers to the amount of uplink data that can be obtained and arrives in one logical channel (the amount of data available), or the amount of uplink data that can be obtained in the logical channel group to which the logical channel belongs. Preferably, each buffer size corresponds to or is associated with a logical channel or a logical channel group.
Preferably, when the Timer retx non SDT BSR-Timer runs out of time, if at least one logical channel contains (continain) uplink data and the logical channel is not configured with SDT, the UE triggers the non SDT BSR. The term "including uplink data" herein may refer to the arrival of uplink data as described above. Since there is a triggered non SDT BSR, the UE may perform the operation in step S102. When the Timer retx non SDT BSR-Timer runs out of time, if none of the logical channels containing uplink data is configured with SDT, the UE will not trigger the non SDT BSR.
Example two
In order to avoid the data of the DRB for Non SDT being reported redundantly, during the small data transmission process of the UE (i.e. when the UE is in the Non-connected state for data transmission), the BSR is triggered according to the data arrival of the DRB for SDT, i.e. the data arrival of the DRB for Non SDT will not trigger the BSR.
The specific implementation mode can be
When uplink data of a certain logical channel can be acquired by the MAC entity (UL data available to the MAC entry), and when the UE is in an inactive state, if the logical channel to which this data belongs is configured with SDT and the priority of the logical channel is higher than the priority of other logical channels for which uplink data is already available, the UE may trigger BSR.
When uplink data on a certain logical channel can be acquired by the MAC entity and when the UE is in an inactive state, the UE may trigger a BSR if the logical channel to which this data belongs is configured with SDT and no other logical channel contains available uplink data at this time. Preferably, the "other" logical channels herein refer to logical channels configured with SDT.
Preferably, when the UE has a triggered BSR and there is available uplink resources, the UE may instruct to generate a BSR MAC CE (instruction to generate the BSR) and start or restart the Timer retxsbr-Timer.
Preferably, when the UE has available uplink resources, the Timer retxsbsr-Timer may be restarted.
Preferably, this triggered BSR is cancelled (cancel) once the BSR MAC CE is included in the transmitted MAC PDU
Preferably, when the Timer retxsrb-Timer runs out of time (expiry) and the UE is in an inactive state, if a logical channel contains uplink data and the logical channel to which the data belongs is configured with SDT, the UE triggers the BSR.
Optionally, as a supplement to the scheme of the UE during small data transmission, that is, during data transmission using non-small data transmission, the UE may trigger the BSR under the following conditions:
when uplink data of a certain logical channel is available or can be obtained by the MAC entity (UL data available to the MAC entry), and when the UE is in the connected state, the UE may trigger BSR if the priority of the logical channel to which this data belongs is higher than the priority of other existing logical channels for which uplink data is available
When uplink data on a certain logical channel can be acquired by the MAC entity, and when the UE is in a connected state, the UE may trigger a BSR if no other logical channel contains available uplink data at the time.
And
when the Timer retxsrb-Timer runs out of time,
when the UE is in the connected state, if there is a logical channel containing uplink data, the UE triggers a BSR.
The second embodiment can be implemented as a supplement to the first embodiment or separately. The triggered BSR may be referred to as a regular BSR herein, and the BSR MAC CE generated based on the triggered BSR may be referred to as a regular BSR MAC CE to distinguish from the Non SDT BSR MAC CE in embodiment one.
EXAMPLE III
On the basis of the foregoing embodiment, when the UE enters the connected state, if there is a retx non SDT BSR-Timer that is running, the UE stops the retx non SDT BSR-Timer.
Here, the UE's judgment of entering the connected state may be based on a state of an upper layer, such as a state of an RRC layer, or the RRC layer instructs a MAC layer to enter the connected state. .
Yet another embodiment of the above scheme may be
When the UE enters the connected state, the UE resets the MAC layer. At least retx non SDT BSR-Timer, in which the UE stops running, is included in the operation of resetting the MAC layer.
The UE may reset the MAC layer after receiving an RRC recovery message (RRC resume message), which is preferably a response message to an RRC recovery request message (RRC resume request message) for Small Data Transmission (SDT) sent by the UE, or equivalently, an RRC resume request message triggered by the SDT sent by the UE.
Example four
On the basis of the foregoing embodiments, if there is a situation that the Non SDT BSR MAC CE and the regular BSR MAC CE need to be multiplexed and assembled (multiplex and assembled) into one MAC PDU at the same time when the UE generates the MAC PDU, the priority of the Non SDT BSR MAC CE is higher than that of the regular BSR MAC CE. The priority here means that under the condition of certain resources, Non SDT BSR MAC CE is preferentially put into the MAC PDU, and if the resources are remained, regular BSR MAC CE is continuously considered. Such "priority" refers to preferential multiplexing (multiplex) or preferential assembly (assembly) in a multiplex assembly operation.
EXAMPLE five
On the basis of the foregoing embodiments, when the UE enters the connected state, if there is a triggered BSR, whether it is a Non SDT BSR mentioned in embodiment one or a regular BSR mentioned in embodiment two, the UE cancels the triggered BSR.
Here, the UE's judgment of entering the connected state may be based on a state of an upper layer, such as a state of an RRC layer, or the RRC layer instructs a MAC layer to enter the connected state.
Yet another embodiment of the above scheme may be
When the UE enters the connected state, the UE resets the MAC layer. At least the cancellation of the triggered BSR (Non SDT BSR or regular BSR) is included in the operation of resetting the MAC layer.
The UE may reset the MAC layer after receiving an RRC recovery message (RRC resume message), which is preferably a response message to an RRC recovery request message (RRC resume request message) for Small Data Transmission (SDT) sent by the UE, or equivalently, an RRC resume request message triggered by the SDT sent by the UE.
Fig. 2 is a block diagram showing a schematic configuration of a user equipment according to the present invention. As shown in fig. 2, the user equipment UE200 includes a processor 201 and a memory 202. The processor 201 may include, for example, a microprocessor, a microcontroller, an embedded processor, or the like. The memory 202 may include, for example, volatile memory (e.g., random access memory RAM), a Hard Disk Drive (HDD), non-volatile memory (e.g., flash memory), or other memory, etc. The memory 202 has stored thereon program instructions. Which when executed by the processor 201 may perform the above-described method performed by the user equipment as described in detail in the present invention.
The program running on the apparatus according to the present invention may be a program that causes a computer to realize the functions of the embodiments of the present invention by controlling a Central Processing Unit (CPU). The program or information processed by the program may be temporarily stored in a volatile memory (such as a random access memory RAM), a Hard Disk Drive (HDD), a nonvolatile memory (such as a flash memory), or other memory system.
A program for implementing the functions of the embodiments of the present invention may be recorded on a computer-readable recording medium. The corresponding functions can be realized by causing a computer system to read the programs recorded on the recording medium and execute the programs. The term "computer system" as used herein may be a computer system embedded in the device and may include an operating system or hardware (e.g., peripheral devices). The "computer-readable recording medium" may be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a recording medium that stores a program for short-term dynamics, or any other recording medium that is readable by a computer.
Various features or functional blocks of the devices used in the above-described embodiments may be implemented or performed by circuitry (e.g., a single or multiple chip integrated circuits). Circuitry designed to perform the functions described herein may include a general purpose processor, a 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 combination thereof. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The circuit may be a digital circuit or an analog circuit. Where new integrated circuit technologies have emerged as a replacement for existing integrated circuits due to advances in semiconductor technology, one or more embodiments of the present invention may also be implemented using these new integrated circuit technologies.
Further, the present invention is not limited to the above-described embodiments. While various examples of the embodiments have been described, the present invention is not limited thereto. Fixed or non-mobile electronic devices installed indoors or outdoors may be used as terminal devices or communication devices, such as AV devices, kitchen devices, cleaning devices, air conditioners, office devices, vending machines, and other home appliances.
As above, the embodiments of the present invention have been described in detail with reference to the accompanying drawings. However, the specific configuration is not limited to the above embodiment, and the present invention includes any design modification without departing from the gist of the present invention. In addition, the present invention can be variously modified within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in the different embodiments are also included in the technical scope of the present invention. Further, components having the same effects described in the above embodiments may be substituted for each other.

Claims (10)

1. A method executed by User Equipment (UE) is a control method when the UE has data of a Data Radio Bearer (DRB) for Non SDT not based on small data transmission in the process of carrying out the Small Data Transmission (SDT), and comprises the following steps:
the UE is in an inactive state, when uplink data of a certain logical channel can be acquired by an MAC entity, and the DRB to which the logical channel belongs is not configured with SDT or the logical channel is not configured with SDT, the UE triggers a Non-small data transmission buffer status report (Non SDT BSR);
when the triggered Non SDT BSR exists and the UE has uplink resources, the UE indicates to generate a Non SDT BSR MAC CE and starts a Timer retx Non SDT BSR-Timer, wherein when the Non SDT BSR MAC CE is contained in the sent MAC PDU, the UE cancels the triggered Non SDT BSR.
2. The method performed by a user equipment of claim 1,
the Non SDT BSR MAC CE may include one or more of the following:
the MAC subheader carries a specific Logical Channel Identifier (LCID) and is used for indicating the arrival of the data of the Non SDT;
a logical channel identifier, wherein the logical channel is a logical channel to which the arriving uplink data belongs;
a logical channel group identifier, where the logical channel group is a logical channel group to which a logical channel to which the arriving uplink data belongs;
and the buffer size is the uplink data amount which can be acquired and arrives in one logical channel or all the uplink data amounts which can be acquired in the logical channel group to which the logical channel belongs.
3. The method performed by a user equipment of claim 1,
when the Timer retx Non SDT BSR-Timer runs out of time, if a logical channel contains uplink data and the logical channel is not configured with SDT, the UE triggers the Non SDT BSR.
4. The method performed by the user equipment according to claim 1, further comprising the steps of:
triggering BSR according to the data arrival of DRB for SDT in the process of small data transmission of UE;
when the UE has the triggered BSR and available uplink resources, the UE indicates to generate a BSR MAC CE and starts or restarts a Timer retxBSR-Timer, wherein when the BSR MAC CE is contained in the transmitted MAC PDU, the UE cancels the triggered BSR.
5. The method performed by the user equipment of claim 4,
when uplink data of a certain logical channel can be acquired by an MAC entity and when UE is in an inactive state, if the logical channel to which the data belongs is configured with SDT and the priority of the logical channel is higher than the priority of other existing logical channels capable of acquiring the uplink data, the UE triggers BSR;
when uplink data on a certain logical channel can be acquired by the MAC entity and when the UE is in an inactive state, if the logical channel to which the data belongs is configured with SDT and no other logical channel contains the uplink data that can be acquired, the UE triggers a BSR.
6. The method performed by the user equipment of claim 4,
when the Timer retxsrb-Timer runs out of time,
when the UE is in an inactive state, if there is a logical channel containing uplink data and the logical channel to which this data belongs is configured with SDT, the UE triggers a BSR.
7. The method performed by a user equipment of any of claims 1-3,
when the UE enters the connected state, if there is a running Timer retx non SDT BSR-Timer, the UE stops the Timer retx non SDT BSR-Timer.
8. The method performed by a user equipment of any of claims 1-3,
when the UE enters the connected state, the UE resets the MAC layer, and the operation of resetting the MAC layer at least comprises the operation that the UE stops the running Timer retx non SDT BSR-Timer.
9. The method performed by the user equipment of claim 4,
if the UE generates the MAC PDU and the Non SDT BSR MAC CE and the regular BSR MAC CE need to be multiplexed in one MAC PDU, the priority of the Non SDT BSR MAC CE is set to be higher than that of the regular BSR MAC CE.
10. A user equipment, comprising:
a processor; and
a memory having instructions stored thereon,
the instructions, when executed by the processor, cause the user equipment to perform the method of any of claims 1-9.
CN202011555889.1A 2020-12-24 2020-12-24 Method executed by user equipment and user equipment Pending CN114666913A (en)

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EP2962485B1 (en) * 2013-03-01 2019-08-21 Intel IP Corporation Wireless local area network (wlan) traffic offloading
US9681354B2 (en) * 2013-08-08 2017-06-13 Intel IP Corporation Signaling radio bearer optimizations and other techniques for supporting small data transmissions
US9374151B2 (en) * 2013-08-08 2016-06-21 Intel IP Corporation Coverage extension level for coverage limited device

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