Buffer size calculation with multi-threshold delay status report
The multi-threshold DSR system accurately calculates buffer sizes by accounting for data units within and outside specific time ranges, ensuring proper resource allocation and prioritization of critical data, thus improving network efficiency.
Patent Information
- Application Number
- PCT/CN2024/124282
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2026-04-16
AI Technical Summary
Existing DSR mechanisms struggle to accurately calculate buffer sizes when multiple reporting thresholds are used, leading to incorrect resource allocation and potential mismanagement of delay-critical data in networks.
Implement a multi-threshold DSR system where each entry in the status report includes a buffer size value corresponding to a specific remaining time range, accounting for data units both within and outside that range, and indicating the importance level of the data units.
This approach ensures accurate buffer size calculation, enabling proper resource allocation and prioritization of high-importance data, thereby enhancing network efficiency and data transmission quality.
Smart Images

Figure CN2024124282_16042026_PF_FP_ABST
Abstract
Description
BUFFER SIZE CALCULATION WITH MULTI-THRESHOLD DELAY STATUS REPORT
[0001] FIELDS
[0002] Various example embodiments of the present disclosure generally relate to the field of telecommunication and in particular, to methods, devices, apparatuses and computer readable storage medium for calculating buffer size by using a multi-threshold delay status report (DSR) .BACKGROUND
[0003] With developments in network communication technologies, efficient data transmission has become critical, especially for delay-sensitive applications. A key challenge is optimizing the reporting of data transmission delays and managing buffer sizes to ensure that delay-critical data is prioritized. The delay status report (DSR) is used to manage data traffic more effectively by reporting the delay urgency of different data packets within a network. Therefore, it is worth studying DSR and buffer size calculation to further enhance the efficiency of data transmission and improve the overall management of network traffic and resource allocation.SUMMARY
[0004] In a first aspect of the present disclosure, there is provided a first apparatus. The first apparatus comprises at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the first apparatus to: receive, from a second apparatus, configuration information indicating a plurality of reporting thresholds of remaining time; and transmit, to the second apparatus, the status report comprising a plurality of entries, each entry comprising a first field indicating a buffer size value corresponding to a remaining time range of a plurality of remaining time ranges which are determined based on the plurality of reporting thresholds, and the buffer size value indicating a total size of data units associated with the remaining time range and at least one data unit that is not associated with the remaining time range and is ahead of any data unit of the data units associated with the remaining time range.
[0005] In a second aspect of the present disclosure, there is provided a second apparatus. The second apparatus comprises at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the second apparatus to:transmit, to a first apparatus, configuration information indicating a plurality of reporting thresholds of remaining time; and receive, from the first apparatus, the status report comprising a plurality of entries, each entry comprising a first field indicating a buffer size value corresponding to a remaining time range of a plurality of remaining time ranges which are determined based on the plurality of reporting thresholds, and the buffer size value indicating a total size of data units associated with the remaining time range and at least one data unit that is not associated with the remaining time range and is ahead of any data unit of the data units associated with the remaining time range.
[0006] In a third aspect of the present disclosure, there is provided a method. The method comprises: receiving, from a second apparatus, configuration information indicating a plurality of reporting thresholds of remaining time; and transmitting, to the second apparatus, the status report comprising a plurality of entries, each entry comprising a first field indicating a buffer size value corresponding to a remaining time range of a plurality of remaining time ranges which are determined based on the plurality of reporting thresholds, and the buffer size value indicating a total size of data units associated with the remaining time range and at least one data unit that is not associated with the remaining time range and is ahead of any data unit of the data units associated with the remaining time range.
[0007] In a fourth aspect of the present disclosure, there is provided a method. The method comprises: transmitting, to a first apparatus, configuration information indicating a plurality of reporting thresholds of remaining time; and receiving, from the first apparatus, the status report comprising a plurality of entries, each entry comprising a first field indicating a buffer size value corresponding to a remaining time range of a plurality of remaining time ranges which are determined based on the plurality of reporting thresholds, and the buffer size value indicating a total size of data units associated with the remaining time range and at least one data unit that is not associated with the remaining time range and is ahead of any data unit of the data units associated with the remaining time range.
[0008] In a fifth aspect of the present disclosure, there is provided a first apparatus. The first apparatus comprises means for receiving, from a second apparatus, configuration information indicating a plurality of reporting thresholds of remaining time; and means for transmitting, to the second apparatus, the status report comprising a plurality of entries, each entry comprising a first field indicating a buffer size value corresponding to a remaining time range of a plurality of remaining time ranges which are determined based on the plurality of reporting thresholds, and the buffer size value indicating a total size of data units associated with the remaining time range and at least one data unit that is not associated with the remaining time range and is ahead of any data unit of the data units associated with the remaining time range.
[0009] In a sixth aspect of the present disclosure, there is provided a second apparatus. The second apparatus comprises means for transmitting, to a first apparatus, configuration information indicating a plurality of reporting thresholds of remaining time; and means for receiving, from the first apparatus, the status report comprising a plurality of entries, each entry comprising a first field indicating a buffer size value corresponding to a remaining time range of a plurality of remaining time ranges which are determined based on the plurality of reporting thresholds, and the buffer size value indicating a total size of data units associated with the remaining time range and at least one data unit that is not associated with the remaining time range and is ahead of any data unit of the data units associated with the remaining time range.
[0010] In a seventh aspect of the present disclosure, there is provided a computer readable medium. The computer readable medium comprises instructions stored thereon for causing an apparatus to perform at least the method according to the third aspect.
[0011] In an eighth aspect of the present disclosure, there is provided a computer readable medium. The computer readable medium comprises instructions stored thereon for causing an apparatus to perform at least the method according to the fourth aspect.
[0012] It is to be understood that the Summary section is not intended to identify key or essential features of embodiments of the present disclosure, nor is it intended to be used to limit the scope of the present disclosure. Other features of the present disclosure will become easily comprehensible through the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Some example embodiments will now be described with reference to the accompanying drawings, where:
[0014] FIG. 1 illustrates an example communication environment in which example embodiments of the present disclosure can be implemented;
[0015] FIG. 2 illustrates a schematic diagram of a DSR format with multiple rows for each logical channel group (LCG) in accordance with some embodiments of the present disclosure;
[0016] FIG. 3 illustrates a schematic diagram of an example buffer status at the user equipment (UE) with multiple reporting thresholds and protocol data unit (PDU) sets in accordance with some embodiments of the present disclosure;
[0017] FIG. 4 illustrates a signaling flow of communication in accordance with some embodiments of the present disclosure;
[0018] FIG. 5 illustrates an example signaling flow of communication in accordance with some embodiments of the present disclosure;
[0019] FIG. 6 illustrates a schematic diagram of another example buffer status at the user equipment (UE) with multiple reporting thresholds and PDU sets in accordance with some embodiments of the present disclosure;
[0020] FIG. 7 illustrates a flowchart of a method implemented at a first apparatus according to some example embodiments of the present disclosure;
[0021] FIG. 8 illustrates a flowchart of a method implemented at a second apparatus according to some example embodiments of the present disclosure;
[0022] FIG. 9 illustrates a simplified block diagram of a device that is suitable for implementing example embodiments of the present disclosure; and
[0023] FIG. 10 illustrates a block diagram of an example computer readable medium in accordance with some example embodiments of the present disclosure.
[0024] Throughout the drawings, the same or similar reference numerals represent the same or similar element.DETAILED DESCRIPTION
[0025] Principle of the present disclosure will now be described with reference to some example embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. Embodiments described herein can be implemented in various manners other than the ones described below.
[0026] In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.
[0027] References in the present disclosure to “one embodiment, ” “an embodiment, ” “an example embodiment, ” and the like indicate that the embodiment described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
[0028] It shall be understood that although the terms “first, ” “second” and the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and similarly, a second element could be termed a first element, without departing from the scope of example embodiments. As used herein, the term “and / or” includes any and all combinations of one or more of the listed terms.
[0029] As used herein, “at least one of the following: <a list of two or more elements>” and “at least one of <a list of two or more elements>” and similar wording, where the list of two or more elements are joined by “and” or “or” , mean at least any one of the elements, or at least any two or more of the elements, or at least all the elements.
[0030] As used herein, unless stated explicitly, performing a step “in response to A” does not indicate that the step is performed immediately after “A” occurs and one or more intervening steps may be included.
[0031] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a” , “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” , “comprising” , “has” , “having” , “includes” and / or “including” , when used herein, specify the presence of stated features, elements, and / or components etc., but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof.
[0032] As used in this application, the term “circuitry” may refer to one or more or all of the following:
[0033] (a) hardware-only circuit implementations (such as implementations in only analog and / or digital circuitry) and
[0034] (b) combinations of hardware circuits and software, such as (as applicable) :
[0035] (i) a combination of analog and / or digital hardware circuit (s) with software / firmware and
[0036] (ii) any portions of hardware processor (s) with software (including digital signal processor (s) ) , software, and memory (ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and
[0037] (c) hardware circuit (s) and or processor (s) , such as a microprocessor (s) or a portion of a microprocessor (s) , that requires software (e.g., firmware) for operation, but the software may not be present when it is not needed for operation.
[0038] This definition of circuitry applies to all uses of this term in this application, including in any claims. As a further example, as used in this application, the term circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and / or firmware. The term circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.
[0039] As used herein, the term “communication network” refers to a network following any suitable communication standards, such as New Radio (NR) , Long Term Evolution (LTE) , LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , High-Speed Packet Access (HSPA) , Narrow Band Internet of Things (NB-IoT) and so on. Furthermore, the communications between a terminal device and a network device in the communication network may be performed according to any suitable generation communication protocols, including, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, the sixth generation (6G) communication protocols, and / or any other protocols either currently known or to be developed in the future. Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will of course also be future type communication technologies and systems with which the present disclosure may be embodied. It should not be seen as limiting the scope of the present disclosure to only the aforementioned system.
[0040] As used herein, the term “network device” refers to a node in a communication network via which a terminal device accesses the network and receives services therefrom. The network device may refer to a base station (BS) or an access point (AP) , for example, a node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , an NR NB (also referred to as a gNB) , a Remote Radio Unit (RRU) , a radio header (RH) , a remote radio head (RRH) , a relay, an Integrated Access and Backhaul (IAB) node, a low power node such as a femto, a pico, a non-terrestrial network (NTN) or non-ground network device such as a satellite network device, a low earth orbit (LEO) satellite and a geosynchronous earth orbit (GEO) satellite, an aircraft network device, and so forth, depending on the applied terminology and technology. In some example embodiments, radio access network (RAN) split architecture comprises a Centralized Unit (CU) and a Distributed Unit (DU) at an IAB donor node. An IAB node comprises a Mobile Terminal (IAB-MT) part that behaves like a UE toward the parent node, and a DU part of an IAB node behaves like a base station toward the next-hop IAB node.
[0041] The term “terminal device” refers to any end device that may be capable of wireless communication. By way of example rather than limitation, a terminal device may also be referred to as a communication device, user equipment (UE) , a Subscriber Station (SS) , a Portable Subscriber Station, a Mobile Station (MS) , or an Access Terminal (AT) . The terminal device may include, but not limited to, a mobile phone, a cellular phone, a smart phone, voice over IP (VoIP) phones, wireless local loop phones, a tablet, a wearable terminal device, a personal digital assistant (PDA) , portable computers, desktop computer, image capture terminal devices such as digital cameras, gaming terminal devices, music storage and playback appliances, vehicle-mounted wireless terminal devices, wireless endpoints, mobile stations, laptop-embedded equipment (LEE) , laptop-mounted equipment (LME) , USB dongles, smart devices, wireless customer-premises equipment (CPE) , an Internet of Things (loT) device, a watch or other wearable, a head-mounted display (HMD) , a vehicle, a drone, a medical device and applications (e.g., remote surgery) , an industrial device and applications (e.g., a robot and / or other wireless devices operating in an industrial and / or an automated processing chain contexts) , a consumer electronics device, a device operating on commercial and / or industrial wireless networks, and the like. The terminal device may also correspond to a Mobile Termination (MT) part of an IAB node (e.g., a relay node) . In the following description, the terms “terminal device” , “communication device” , “terminal” , “user equipment” and “UE” may be used interchangeably.
[0042] As used herein, the term “resource, ” “transmission resource, ” “resource block, ” “physical resource block” (PRB) , “uplink resource, ” or “downlink resource” may refer to any resource for performing a communication, for example, a communication between a terminal device and a network device, such as a resource in time domain, a resource in frequency domain, a resource in space domain, a resource in code domain, or any other resource enabling a communication, and the like.
[0043] As used herein, the term “DSR” refers to delay status report, a mechanism in telecommunications used to manage data traffic more effectively by reporting the delay urgency of different data packets within a network. This report is particularly useful in networks where timely data delivery is crucial, such as in video streaming, gaming, and extended reality (XR) applications.
[0044] As used herein, the term “MAC” refers to Medium Access Control, a sublayer of the data link layer in the network protocol stack. The MAC layer is responsible for managing how data packets are transmitted between devices over a shared communication medium.
[0045] As used herein, the term “PDU” refers to Protocol Data Unit, which is a generic term in telecommunications and networking that describes a unit of data specified in a protocol of a given layer. PDUs represent data that includes both the payload and the control information that are required to deliver the payload.
[0046] As used herein, the term “delay critical data” may refer to data that must be transmitted within a strict time frame to ensure proper functionality and performance of applications or services. Such data is highly sensitive to transmission delays, meaning any significant delay in delivery can result in degraded service quality, missed deadlines, or complete service failure. For example, in real-time communications, video conferencing, or XR applications, delay critical data includes audio, video, or control signals that must arrive promptly to maintain synchronization and a seamless user experience.
[0047] Among the objectives of the release 19 work item on XR enhancements, it has been agreed to specify enhancements for support of UL scheduling to enable high XR capacity while meeting delay requirements or avoiding too late PDUs, as follows: to specify additional logical channel priority handling using delay or deadline information of packets; to specify enhanced DSR reporting with multiple pairs of remaining time and buffer size for an LCG.
[0048] In some solutions, DSR enhancements with multiple thresholds and grouping of data are provided. In the solution, the network may configure multiple remaining time thresholds for reporting for each LCG to report multiple pairs of remaining time and buffer size per LCG. As for the legacy DSR mechanism, a single triggering threshold is provided. In this case, it may be found that the followings need to be studied: whether there are any constraints on how the NW configures DSR triggering and reporting thresholds; whether there is any impact on delay critical data definition due to multiple reporting thresholds in the DSR; whether to include non-delay critical data ahead of delay critical data in the buffer size calculation for DSR; whether PDU set importance needs to be included; and whether or how additional priority impacts intra-UE prioritization.
[0049] FIG. 1 illustrates an example communication environment 100 in which example embodiments of the present disclosure can be implemented. The communication environment 100 includes a first apparatus 110 and a second apparatus 120. A serving area provided by the second apparatus 120 is called a cell. Further, the second apparatus 120 can provide one or more cells, for example, a cell 102 is provided by the second apparatus 120, as illustrated in FIG. 1.
[0050] In some example embodiments, the first apparatus 110 may be comprised in a terminal device / apparatus and the second apparatus 120 may be comprised in a network device / apparatus serving the terminal device / apparatus.
[0051] In the following, for the purpose of illustration, some example embodiments are described with the first apparatus 110 operating as a terminal apparatus and the second apparatus 120 operating as a network apparatus. However, in some example embodiments, operations described in connection with a terminal apparatus may be implemented at a network apparatus or other apparatus, and operations described in connection with a network apparatus may be implemented at a terminal apparatus or other apparatus.
[0052] In some example embodiments, if the first apparatus 110 is a terminal apparatus and the second apparatus 120 is a network apparatus, a link from the second apparatus 120 to the first apparatus 110 is referred to as a downlink (DL) , while a link from the first apparatus 110 to the second apparatus 120 is referred to as an uplink (UL) . In DL, the second apparatus 120 is a transmitting (TX) apparatus (or a transmitter) and the first apparatus 110 is a receiving (RX) apparatus (or a receiver) . In UL, the first apparatus 110 is a TX apparatus (or a transmitter) and the second apparatus 120 is a RX apparatus (or a receiver) .
[0053] It is to be understood that the number of devices and their connections shown in FIG. 1 are only for the purpose of illustration without suggesting any limitation. The communication environment 100 may include any suitable number of devices configured to implementing example embodiments of the present disclosure. Although not shown, it would be appreciated that one or more additional devices may be located in the cell 102, and one or more additional cells may be deployed in the communication environment 100. It is noted that although illustrated as a network device, the second apparatus 120 may be another device than a network device. Although illustrated as a terminal device, the first apparatus 110 may be another device than a terminal device.
[0054] Communications in the communication environment 100 may be implemented according to any proper communication protocol (s) , comprising, but not limited to, cellular communication protocols of the first generation (1G) , the second generation (2G) , the third generation (3G) , the fourth generation (4G) , the fifth generation (5G) , 5.5G, the sixth generation (6G) , and the like, wireless local network communication protocols such as Institute for Electrical and Electronics Engineers (IEEE) 802.11 and the like, and / or any other protocols currently known or to be developed in the future. Moreover, the communication may utilize any proper wireless communication technology, comprising but not limited to: Code Division Multiple Access (CDMA) , Frequency Division Multiple Access (FDMA) , Time Division Multiple Access (TDMA) , Frequency Division Duplex (FDD) , Time Division Duplex (TDD) , Multiple-Input Multiple-Output (MIMO) , Orthogonal Frequency Division Multiple (OFDM) , Discrete Fourier Transform spread OFDM (DFT-s-OFDM) and / or any other technologies currently known or to be developed in the future.
[0055] In some solutions, for the buffer size calculation for DSR, it is provided that non-delay critical data or low-importance data ahead of delay-critical data may be reported in the DSR. In the present disclosure, it is extended to the case of DSR reporting with multiple remaining time thresholds. In this case, in the DSR, both delay-critical data, non-delay critical data and / or low-importance data can be reported.
[0056] As for the PSI discarding, only two levels including high importance data and low importance data are used. Further, the reserved R-bit included in the DSR format is associated to each reported remaining time and buffer size pair. In some solutions, for reporting low-importance data in DSR, it is provided to use R-bit in the DSR to report the importance level, i.e. if the remaining time is reported for the high importance data, the discardTimer is used, or if the remaining time is reported for the low importance data, the discardTimerForLowImportance is used.
[0057] One proposed solution is to use an I-bit instead of the previous R-bit to indicate the importance level in the DSR format. For example, as shown in FIG. 2, which illustrates a schematic diagram of a DSR format 200 with multiple rows for each logical channel group (LCG) , which has delay critical data including multiple PDU sets. The DSR format 200 indicates the importance level of the reported buffer size and remaining time. Furthermore, instead of the R-bit there is an I-bit indicating the importance of the associated remaining time and buffer size.
[0058] As shown in FIG. 2, either only low-importance data or only high-importance data is included in the buffer size calculation for the buffer size value reported in each of the DSR fields. Besides, for PDU set base discard, the whole PDU set is considered as delay critical data to be reported in DSR as long as there is any packet data convergence protocol (PDCP) SDU within the PDU set with remaining time below the configured threshold. If pdu-SetDiscard is not configured, a delay critical PDCP SDU is a PDCP SDU for which the remaining time till discardTimer expiry is less than the remainingTimeThreshold. If pdu-SetDiscard is configured, a delay critical PDCP SDU is a PDCP SDU belonging to a PDU set of which at least one PDCP SDU has the remaining time till discardTimer expiry less than the remainingTimeThreshold.
[0059] If the buffer size calculation for release 18 DSR is extended to the DSR format with multiple reporting time thresholds, the information carried by the DSR may not be sufficient to inform the network about the amount of resources it needs to allocate to the UE, so that the UE may include in the transport block all the data associated with a certain remaining time or remaining time threshold. In some solutions, a single reporting threshold is provided where only delay-critical data is reported in the DSR.
[0060] FIG. 3 illustrates a schematic diagram of an example buffer status 300 at the user equipment (UE) with multiple reporting thresholds and data unit sets (for example, protocol data unit (PDU) sets) . The problem with multiple remaining time (RT) thresholds is described with reference to the FIG. 3. As shown in FIG. 3, DSR is configured with multiple RT thresholds, that is, three RT thresholds: RT T0, RT T1 and RT T2. In addition, data units (for example, PDU) in sequence belong to 3 different data unit sets in the buffer: data unit set 310 including data units 3010-0, 3010-1 and 3010-4, data unit set 320 including data units 3010-2, 3010-3, 3010-5 and 3010-6 and data unit set 330 including data unit 30s10-7. Only for the purpose of illustration, the data units in FIG. 3 are referred to as PDU hereinafter and the data unit set in FIG. 3 are referred to as PDU set hereinafter. For example, the RT threshold used to trigger the DSR may be RT T0, when the remaining time till expiration of PDCP discard timer RT0 of the PDU 3010-0 in PDU set 310 becomes smaller than RT T0, a DSR is triggered. The above problem happens no matter whether pdu-SetDiscard is configured or not. If the buffer size calculation for release 18 DSR is extended to the DSR format with multiple reporting time thresholds, the pairs of remaining time and buffer sizes reported in the DSR are shown in the following table 1.
[0061] Table 1
[0062] Although the corresponding remaining time of PDU 3010-4 has a value that is associated to the third RT range (RT T1, RT T2] , since PDU 3010-4 is in the PDU set 310 with PDU 3010-0 and PDU 3010-1, PDU 3010-4 is included in the buffer size calculation corresponding to the first RT range (0, RT T0] . Similarly, PDU 3010-5 and PDU 3010-6 are included in the buffer size calculation corresponding to RT range (RT T0, RT T1] as they are in the data unit set 320 with PDU 3010-2 and PDU 3010-3. In this case, gNB is not able to determine that, for data from data set 310 whose associated remaining time is less than RT T0, it should grant a transport block size (TBS) of at least sum of sizes of PDU 3010-0 PDU 3010-1 PDU 3010-2PDU 3010-3 and PDU 3010-4. The gNB may determine to grant a TBS of sum sizes of PDU 3010-0, PDU 3010-1 and PDU 3010-4, which is erroneous.
[0063] The same problem exits when PSI-based discarding is activated. For example, the data set 320 is a low-importance PDU set. In this case, if DSR only reports high-importance data, the DSR may only include the pair of remaining time and buffer size associated with data set 310, that is, RT= RT0 and BS = size of PDU 3010-0 + size of PDU 3010-1 + size of PDU 3010-4. Alternatively, DSR may also include the pair of remaining time and buffer size for low-importance data, that is, RT= RT2 and BS = size of PDU 3010-2 + size of PDU 3010-3+size of PDU 3010-5 + size of PDU 3010-6. In the above cases, the gNB is not able to determine that for data from data set 310, it should grant a transport block size (TBS) of at least sum sizes of PDU 3010-0, PDU 3010-1, PDU 3010-2, PDU 3010-3 and PDU 3010-4.
[0064] The present disclosure relates to a solution for determining DSR buffer size. With example embodiments of the present disclosure, the buffer size calculation with multi-threshold DSR can be more feasible. Details of the solution in the present disclosure will be discussed with reference to FIG. 4, which illustrates a signaling flow 400 of communication in accordance with some embodiments of the present disclosure. For the purposes of discussion, the signaling flow 400 will be discussed with reference to FIG. 1, for example, by using the first apparatus 110 and the second apparatus 120, where the first apparatus 110 may function as a terminal apparatus and the second apparatus 120 may function as a network apparatus.
[0065] It is to be understood that the operations at the first apparatus 110 and the second apparatus 120 should be coordinated. In other words, the second apparatus 120 and the first apparatus 110 should have a common understand about configurations, parameters and so on. Such a common understand may be implemented by any suitable interactions between the second apparatus 120 and the first apparatus 110 or both the second apparatus 120 and the first apparatus 110 applying the same rule, policy, and / or the like.
[0066] In the following, although some operations are described from a perspective of the first apparatus 110, it is to be understood that the corresponding operations should be performed by the second apparatus 120. Similarly, although some operations are described from a perspective of the second apparatus 120, it is to be understood that the corresponding operations should be performed by the first apparatus 110. Merely for brevity, some of the same or similar contents are omitted here.
[0067] As illustrated in FIG. 4, in operation, the second apparatus 120 transmits (4010) configuration information to the first apparatus 110. In other words, the first apparatus 110 receives (4010) the configuration information. In this case, the configuration information indicates a plurality of reporting thresholds of remaining time.
[0068] In some example embodiments, the configuration information may be configured for a logical channel group (LCG) or a user equipment. That is, the reporting thresholds may be configured per UE or per LCG. In some example embodiments, the first apparatus may determine (4020) the plurality of reporting ranges based on the configuration information received. In some example embodiments, the configuration information may indicate: first information on a triggering threshold of remaining time for the status report (remainingTimeThreshold) , and second information on the plurality of reporting thresholds. The triggering threshold may be the same as one of the plurality of reporting thresholds or may be different from the plurality of reporting thresholds.
[0069] In some example embodiments, the second information may indicate a plurality of offsets, each offset corresponding to a difference between a reporting threshold of the plurality of reporting thresholds and the triggering threshold. Alternatively, in some example embodiments, the second information may indicate a plurality of remaining time values of the plurality of reporting thresholds.
[0070] In some example embodiments, the threshold (s) for reporting multiple pairs of remaining time and corresponding buffer size (also referred to as “reporting threshold (s) ” ) and the threshold for DSR trigger are separately configured. In one example embodiment, the reporting thresholds may be configured relative to the remaining time threshold used for DSR triggering (also referred to as “triggering threshold” ) . In such example embodiments, the reporting thresholds may be represented as an offset (s) above or below the DSR triggering threshold.
[0071] In one example embodiment, the reporting thresholds may be configured to the first apparatus 110 by signaling a list of N values. In one example implementation, the reporting thresholds may be determined by summing triggering threshold (remainingTimeThreshold) with the values in the list. For example, if the configured list comprises values: -5 ms, 0 ms and 10 ms, it means the reporting thresholds are set to:
[0072] ● reportingThreshold#1 = remainingTimeThreshold –5 ms,
[0073] ● reportingThreshold#2 = remainingTimeThreshold + 0 ms, and
[0074] ● reportingThreshold#3 = remainingTimeThreshold + 10 ms.
[0075] In another example embodiment, the reporting thresholds may be independently configured separately from the DSR triggering threshold. For example, the first apparatus 110 may receive a configuration including:
[0076] ● DSR Triggering threshold of remaining time (remainingTimeThreshold) , and
[0077] ● a list of DSR reporting thresholds of remaining time.
[0078] In the following, example embodiments about the remaining time range will be discussed.
[0079] In some example embodiments, one of the plurality of remaining time ranges is a remaining time range between zero and a smallest reporting threshold of the plurality of reporting thresholds, and each of the other remaining time ranges of the plurality of remaining time ranges is a remaining time range between a preceding adjacent reporting threshold and one of the other reporting thresholds rather than the smallest reporting threshold. In this event, in some example embodiments, the buffer size #n (n= [1…N] , where N is the number of reporting thresholds) may indicate the data volume with associated remaining time falling into the range of [threshold #n-1 and threshold #n] , where threshold #0 = 0.
[0080] After the determination of the plurality of reporting ranges, the first apparatus may determine (4030) that a status report is triggered. For example, as shown in FIG. 3, if the remaining time of the PDU 3010-0 is less than the triggering threshold, the status report may be triggered. The first apparatus 110 may generate (4040) the status report. The status report includes a plurality of entries, where each entry includes a first field indicating a buffer size value corresponding to a remaining time range of a plurality of remaining time ranges which are determined based on the plurality of reporting thresholds.
[0081] The first apparatus 110 transmit (4050) the status report to the second apparatus 120. In other words, the second apparatus 120 receives (4050) the status report. In some example embodiments, the status report may be comprised in a MAC CE. The remaining time range also may be called as remaining time interval sometimes. In addition, the buffer size value indicates a total size of data units associated with the remaining time range. Furthermore, in the buffer size calculation for the reported remaining time range, the buffer size value also indicates the size of at least one data unit that is not associated with the remaining time range (i.e. whose associated remaining time is not within the reported remaining time range) , and the at least one data unit is ahead of any data unit of the data units associated with the remaining time range (i.e. whose associated remaining time is within the reported remaining time range) . In other words, all the data up to the last service data unit (SDU) that is with remaining time within the reported range may be calculated in the buffer size calculation for the concerned range, with PDU set taken into account that the shortest remaining time is considered for the whole PDU set when pdu-SetDiscard is configured. With reference to the example of FIG. 3, the DSR report with multiple remaining time thresholds and based on the present disclosure, is shown in Table 2.
[0082] Table 2
[0083] As shown in Table 2, data set 310 with PDU 3010-0, PDU 3010-1 and PDU 3010-4 is included in the buffer size calculation corresponding to RT = RT0. In addition, PDU 3010-2 and PDU 3010-3 in data set 320 are associated with RT2 which is not within the reported remaining time range, however, since PDU 3010-2 and PDU 3010-3 are ahead of PDU 3010-4, sizes of PDU 3010-3 and PDU 3010-3 are included in the buffer size calculation corresponding to RT = RT0.
[0084] In some example embodiments, the data units may further include data units of another data unit set to which the at least one data unit belongs, such as PDU 3010-5 and PDU 3010-6 in PDU set 320, which is not shown in Table 2. For example, in addition to PDU 3010-2 and PDU 3010-3 in the PDU set 320, sizes of the PDU 3010-5 and PDU 3010-6 in PDU set 320 may also be considered for the calculation of the buffer size.
[0085] In some other example embodiments, the data units may exclude one or more data units that are associated with the remaining time range (i.e. whose associated remaining time is within the reported remaining time range) and have been reported in another entry associated with another remaining time range. For example, as shown in Table 2, only sizes of PDU 3010-5 and PDU 3010-6 in data set 320 may be included in the buffer size calculation corresponding to RT = RT2, although PDU 3010-2 and PDU 3010-3 are associated with the same remaining time range. Sizes of PDU 3010-2 and PDU 3010-3 in data set 320 may be excluded from the buffer size calculation corresponding to RT = RT2, since PDU 3010-2 and PDU 3010-3 have been reported before.
[0086] In some example embodiments, the entry may include a second field, and the second field indicates an importance related to the data units. In some example embodiments, the second field may include an indication that the buffer size value associated with the remaining time range at least includes high importance data units, that is, it is indicated that at least some high importance data is included in the reported buffer size. For example, reference is made to FIG. 3, if data set 320 is low importance PDU set, an indication may be included in the DSR that the buffer size associated with RT=RT0 includes at least some high importance data, such as PDU 3010-0, PDU 3010-1 and PDU 3010-4. In some other example embodiments, the second field may include an indication that the buffer size value associated with the remaining time range includes high importance data units and low importance data units, that is, it is indicated that both high importance data and low importance data are included in the reported buffer size. For example, reference is made to FIG. 3, if data set 320 is low importance PDU set, an indication may be included in the DSR that the buffer size associated with RT=RT0 includes both high importance data, such as PDU 3010-0, PDU 3010-1 and PDU 3010-4, and low importance data, such as PDU 3010-2 and PDU 3010-3. Alternatively, the second field may include an indication that the buffer size value associated with the remaining time range includes low importance data. In some example embodiments, the DSR may also include an indication that the buffer size associated with a certain remaining time value includes only high importance data. The importance of data or data units may be determined based on the service related to the data.
[0087] In some example embodiments, each of the plurality of remaining time ranges may be a remaining time range between zero and one of the plurality of reporting thresholds, for example, referring to FIG. 3, a remaining time range between zero and RT T0.In some example embodiments, a first remaining time range of the plurality of remaining time ranges may be remaining time range between zero and a smallest reporting threshold of the plurality of reporting thresholds, as shown in FIG. 3, the first remaining time range may be between zero and RT T0. In addition, each of other remaining time ranges of the plurality of remaining time ranges may be a remaining time range between a preceding reporting threshold and one of the other reporting thresholds, for example, as shown in FIG. 3, a remaining time range between RT T0 and RT T1. In some example embodiments, the number of entries included in the status report for each LCG may be the same as or less than the number of reporting thresholds included in the plurality of reporting thresholds. For example, if the DSR is reporting more than one LCG, the DSR may include the plurality of entries for each of the LCG. The DSR may include more than N entries, if it is reporting more than one LCG, where N represents the number of entries for one LCG. In some other example embodiments, each entry may further include a third field indicating a smallest remaining time of data with remaining time within a respective remaining time range corresponding to the entry. For example, for the remaining time range between zero and RT T0, the third field may indicate the remaining time of the PDU 3010-0, RT0.
[0088] According to example embodiments described with reference to FIG. 4, when a plurality of reporting thresholds are configured, the buffer size for each reporting threshold can be calculated properly, thereby facilitating the PDU set based discarding. Further, it can ensure the transmission of high importance data.
[0089] For a better understanding, an example implementation is discussed with reference to FIG. 5 and FIG. 6. FIG. 5 illustrates an example signaling flow 500 of communication in accordance with some embodiments of the present disclosure. FIG. 6 illustrates a schematic diagram of another example buffer status 600 at the user equipment (UE) with multiple reporting thresholds and PDU sets in accordance with some embodiments of the present disclosure. It is noted that the example implementation should not be a limitation for the present disclosure. The first apparatus 110 may act as the UE 510 and the second apparatus 120 may act as the gNB 520.
[0090] As shown in FIG. 5, the gNB 520 transmits (5010) the configuration information to the UE 510. In other words, the UE 510 receives (5010) configuration information from the gNB 520. In this case, the UE 510 is configured with DSR reporting and 4 reporting thresholds: RT’ T0 < RT’ T1 < RT’ T2 < RT’ T3, as shown in FIG. 6. In some example embodiments, the UE 510 may determine (5020) the plurality of reporting ranges after receiving the configuration information. The DSR triggering threshold is also configured to be equal to the lowest reporting threshold RT’ T0, as shown in FIG. 6. The latter is only an example. The DSR triggering thresholds may be configured to be equal to any of the reporting thresholds or may even be configured to have a value different from any of the reporting thresholds. Referring back to FIG. 5, in some example embodiments, the UE 510 may determine (5030) that a status report is triggered. For example, the value of the remaining time until PDCP discard timer expiration (RT’ 0) of the first PDU 6010-0 of PDU set 610 becomes smaller that the value of the DSR triggering threshold RT’ T0, as shown in FIG. 6, and a DSR is triggered.
[0091] When the MAC layer of the UE 510 is assembling the transport block (TB) where the DSR is transmitted, the UE buffer status is as shown in FIG. 6. For the simplicity, it is considered that one LCG and no RLC data pending for retransmission in the UE buffer. In this case, it may be extended to multiple LCGs and RLC data pending for retransmission in the UE buffer.
[0092] Referring back to FIG. 5, in some example embodiments, the UE 510 may generate (5040) the status report. For example, the status report may include an entry associated with a first reporting range. As shown in FIG. 6, the first reporting range may be (0, RT’ T0] .
[0093] For the reporting range (0, RT’ T0] , data associated to this remaining time range is delay-critical data. In this case, the minimum value of the remaining time within this remaining time range is the remaining time of PDU 6010-0, i.e. RT’ 0. Therefore, the remaining time field of the corresponding pair of remaining time and buffer size is set equal to RT’ 0. For the corresponding buffer size calculation, the PDUs whose remaining time (till expiration of PDCP discard timer) is within this remaining time range are PDU 6010-0 and PDU 6010-1, which are included in the calculation of buffer size. In addition, the size of PDU 6010-4 is also included, since PDU 6010-4 belongs to the same PDU set 610 as PDU 6010-0 and PDU 6010-1 (i.e. its associated remaining time is the same as PDU 6010-0 and PDU 6010-1 and is within the remaining time range) . Furthermore, the size of PDU 6010-2 and PDU 6010-3 is also included in the buffer size calculation as these PDUs, despite not being delay-critical, are ahead of delay-critical data (i.e., PDU 6010-4) in the UE buffer.
[0094] Referring back to FIG. 5, in some example embodiments, the status report may include an entry associated with a second reporting range. As shown in FIG. 6, the second reporting range may be (RT’ T0, RT’ T1] .
[0095] For the reporting range (RT’ T0, RT’ T1] , data associated to this remaining time range is not delay-critical data. In this case, the minimum value of the remaining time within this remaining time range is the remaining time (till expiration of PDCP discard timer) of PDU 6010-2, i.e., RT’ 2. PDU 6010-2 and PDU 6010-3 have already been included in the buffer size calculation for the RT range (0, RT’ T0] . However, there is still a PDU 6010-5 in the same PDU set 620 as PDU 6010-2 and PDU 6010-3 which has not yet been reported and whose associated remaining time is within this remaining time range. Therefore, the remaining time field of the corresponding pair of remaining time and buffer size is set equal to RT’ 2. For the corresponding buffer size calculation, PDU 6010-2 and PDU 6010-3 have associated remaining time within this remaining time range. However, as these PDUs have already been included in the buffer size calculation for the remaining time range (0, RT’ T0] , PDU 6010-2 and PDU 6010-3 should not be included in the buffer size calculation for this remaining time range. Furthermore, the size of PDU 6010-5 is included, since PDU 6010-5 belongs to the same PDU set 620 as PDU 6010-2 and PDU 6010-3 (i.e., its associated remaining time is the same as PDU 6010-2 and PDU 6010-3 and is within the remaining time range) and PDU 6010-5 has not been reported yet. In some other example embodiments, PDU 6010-5 is included in the remaining time range (0, RT’ T0] together with PDU 6010-2 and PDU 6010-3 which belong to the same PDU set 620. Alternatively, PDU 6010-5 is included in the remaining time range (RT’ T1, RT’ T2] in the following entry.
[0096] Referring back to FIG. 5, in some example embodiments, the status report may include an entry associated with a third reporting range. As shown in FIG. 6, the third reporting range may be (RT’ T1, RT’ T2] .
[0097] For the reporting range (RT’ T1, RT’ T2] , data associated to this remaining time range is not delay-critical data. In this case, the minimum value of the remaining time within this remaining time range is the remaining time (till expiration of PDCP discard timer) of PDU 6010-4, i.e. RT’ 4. However, PDU 6010-4 belongs to a PDU set 610 whose associated remaining time is not within this remaining time range. Similar to PDU 6010-5, which belongs to a PDU set 620 whose associated remaining time is not within this remaining time range. The minimum value of the remaining time (till expiration of PDCP discard timer) of a PDU whose associated remaining time is within this remaining time range is therefore the remaining time of PDU 6010-6, i.e., RT’ 6. Hence, the remaining time field of the corresponding pair of remaining time and buffer size is set equal to RT’ 6.For the corresponding buffer size calculation, the sizes of PDU 6010-4 and PDU 6010-5 have already been included in the buffer size calculation for the remaining time range (0, RT’ T0] and (RT’ T0, RT’ T1] , respectively, as their associated remaining time was within those remaining time ranges. In addition, PDU 6010-6 has a remaining time that is within this remaining time range. PDU 6010-6 is the first PDU of a PDU set 630, and PDU 6010-6 has not been reported yet. Therefore, the size of PDU 6010-6 is included in the buffer size calculation. Moreover, PDU 6010-8 belongs to the same PDU set 630 as PDU 6010-6 (i.e., its associated remaining time is within the range) . Therefore, the size of PDU 6010-8 is also included. Additionally, the size of PDU 6010-7 is also included in the buffer size calculation, despite its associated remaining time not being within this remaining time range, as PDU 6010-7 is ahead of data being reported and whose associated remaining time is within this remaining time range (i.e., PDU 6010-8) .
[0098] Referring back to FIG. 5, in some example embodiments, the status report may include an entry associated with a fourth reporting range. As shown in FIG. 6, the fourth reporting range may be (RT’ T2, RT’ T3] .
[0099] For the reporting range (RT’ T2, RT’ T3] , data associated to this remaining time range is not delay-critical data. In this case, the minimum value of the remaining time within this remaining time range is the remaining time (till expiration of PDCP discard timer) of PDU 6010-7, i.e., RT’ 7. PDU 6010-7 has already been included in the buffer size calculation for the remaining time range (RT’ T1, RT’ T2] . However, there is still a PDU 6010-9 in the same PDU data set 640 as PDU 6010-7 which has not yet been reported and whose associated remaining time is within this remaining time range. Therefore, the remaining time field of the corresponding pair of remaining time and buffer size is set equal to RT’ 7. For the corresponding buffer size calculation, the remaining time associated with PDU 6010-7 is within this remaining time range, but the size of PDU 6010-7 has already been included in the buffer size calculation for the remaining time range (RT’ T1, RT’ T2] . Therefore, the size of PDU 6010-7 is not included in the buffer size calculation for this remaining time range. In addition, the size of PDU 6010-8 has already been included in the buffer size calculation for the remaining time range (RT’ T1, RT’ T2] because its associated remaining time was within that remaining time range. Therefore, the size of PDU 6010-8 is not included in the buffer size calculation for this remaining time range. Furthermore, the size of PDU 6010-9 is included in the buffer size calculation, as PDU 6010-9 belongs to the same PDU data set 640 as PDU 6010-7 (i.e., its associated remaining time is within this remaining time range) .
[0100] With the above steps, the pairs of remaining time and buffer size reported for the corresponding remaining time ranges are shown in the following table 3.
[0101] Table 3
[0102] Referring back to FIG. 5, the UE 510 transmit (5050) the status report to gNB 520. In other words, the gNB 520 receives (5050) the status report from the UE 510.
[0103] To illustrate an example implementation in case PSI-based discarding is enabled, PDU sets 620 and PDU sets 640 in FIG. 6 are considered as low-importance PDU sets. In some example embodiments, low importance data may be only reported if ahead of high importance data being reported in the DSR. In this case, the DSR may only include the first pair of remaining time and buffer size corresponding to RT=RT’0, and third pair of remaining time and buffer size corresponding to RT=RT’6 in Table 3. One bit per pair of remaining time and buffer size may be used to indicate whether the reported buffer size only includes high importance data, or to indicate whether the reported buffer size also includes low importance data (first pair of remaining time and buffer size corresponding to RT=RT’ 0 and third pair of remaining time and buffer size corresponding to RT=RT’6 in Table 3) . In some other example embodiments, low importance data may be also reported as high importance data. In this case, the DSR may include all pairs of remaining time and buffer size in Table 3. One bit per pair of remaining time and buffer size may be used to indicate whether the reported buffer size only includes low importance data, in which case the remaining time field may be determined based on discardTimerForLowImportance (second pair of remaining time and buffer size corresponding to RT=RT’2 and fourth pair of remaining time and buffer size corresponding to RT=RT’7 in Table 3) . In addition, one bit per pair of remaining time and buffer size may be used to indicate whether the reported buffer size includes at least some high importance data (first pair of remaining time and buffer size corresponding to RT=RT’0 and third pair of remaining time and buffer size corresponding to RT=RT’6 in Table 3) . Alternatively, two bits per pair of remaining time and buffer size may be used to indicate whether the reported buffer size only includes low importance data (second pair of remaining time and buffer size corresponding to RT=RT’2 and fourth pair of remaining time and buffer size corresponding to RT=RT’7 in Table 3) . In addition, two bits per pair of remaining time and buffer size may be used to indicate whether the reported buffer size only includes high importance data. Furthermore, two bits per pair of remaining time and buffer size may be used to indicate whether the reported buffer size includes both low importance data and high importance data (first pair of remaining time and buffer size corresponding to RT=RT’0 and third pair of remaining time and buffer size corresponding to RT=RT’6 in Table 3) .
[0104] FIG. 7 shows a flowchart of an example method 700 implemented at a first apparatus in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the method 700 will be described from the perspective of the first apparatus 110 in FIG. 1.
[0105] At block 710, the first apparatus receives, from a second apparatus, configuration information indicating a plurality of reporting thresholds of remaining time.
[0106] At block 720, the first apparatus transmits, to the second apparatus, the status report comprising a plurality of entries, each entry comprising a first field indicating a buffer size value corresponding to a remaining time range of a plurality of remaining time ranges which are determined based on the plurality of reporting thresholds, and the buffer size value indicating a total size of data units associated with the remaining time range and at least one data unit that is not associated with the remaining time range and is ahead of any data unit of the data units associated with the remaining time range.
[0107] In some example embodiments, the data units further comprise data units of another data unit set to which the at least one data unit belongs.
[0108] In some example embodiments, the data units exclude one or more data units that are associated with the remaining time range and have been reported in another entry associated with another remaining time range.
[0109] In some example embodiments, the entry comprises a second field indicating an importance related to the data units.
[0110] In some example embodiments, the second field comprises an indication that the buffer size value associated with the remaining time range at least includes high importance data units.
[0111] In some example embodiments, the second field comprises an indication that the buffer size value associated with the remaining time range includes high importance data units and low importance data units.
[0112] In some example embodiments, the second field comprises an indication that the buffer size value associated with the remaining time range includes low importance data units.
[0113] In some example embodiments, the configuration information indicates: first information on a triggering threshold of remaining time for the status report, and second information on the plurality of reporting thresholds.
[0114] In some example embodiments, each of the plurality of remaining time ranges is a remaining time range between zero and one of the plurality of reporting thresholds.
[0115] In some example embodiments, a first remaining time range of the plurality of remaining time ranges is a remaining time range between zero and a smallest reporting threshold of the plurality of reporting thresholds, and each of other remaining time ranges of the plurality of remaining time ranges is a remaining time range between a preceding reporting threshold and one of the other reporting thresholds.
[0116] In some example embodiments, the number of entries comprised in the status report for each logical channel group (LCG) is the same as or less than the number of reporting thresholds comprised in the plurality of reporting thresholds.
[0117] In some example embodiments, each entry further comprises a third field indicating a smallest remaining time of data with remaining time within a respective remaining time range corresponding to the entry.
[0118] In some example embodiments, the configuration information is configured for a logical channel group (LCG) or a user equipment.
[0119] In some example embodiments, the status report is comprised in a medium access control control element (MAC CE) .
[0120] In some example embodiments, the first apparatus is a terminal device and the second apparatus is a network device.
[0121] FIG. 8 shows a flowchart of an example method 800 implemented at a second apparatus in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the method 800 will be described from the perspective of the second apparatus 120 in FIG. 1.
[0122] At block 810, the second apparatus 120 transmits, to a first apparatus, configuration information indicating a plurality of reporting thresholds of remaining time.
[0123] At block 820, the second apparatus 120 receives, from the first apparatus, the status report comprising a plurality of entries, each entry comprising a first field indicating a buffer size value corresponding to a remaining time range of a plurality of remaining time ranges which are determined based on the plurality of reporting thresholds, and the buffer size value indicating a total size of data units associated with the remaining time range and at least one data unit that is not associated with the remaining time range and is ahead of any data unit of the data units associated with the remaining time range.
[0124] In some example embodiments, the data units further comprise data units of another data unit set to which the at least one data unit belongs.
[0125] In some example embodiments, the data units exclude one or more data units that are associated with the remaining time range and have been reported in another entry associated with another remaining time range.
[0126] In some example embodiments, the entry comprises a second field indicating an importance related to the data units.
[0127] In some example embodiments, the second field comprises an indication that the buffer size value associated with the remaining time range at least includes high importance data units.
[0128] In some example embodiments, the second field comprises an indication that the buffer size value associated with the remaining time range includes high importance data units and low importance data units.
[0129] In some example embodiments, the second field comprises an indication that the buffer size value associated with the remaining time range includes low importance data units.
[0130] In some example embodiments, the configuration information indicates: first information on a triggering threshold of remaining time for the status report, and second information on the plurality of reporting thresholds.
[0131] In some example embodiments, each of the plurality of remaining time ranges is a remaining time range between zero and one of the plurality of reporting thresholds.
[0132] In some example embodiments, a first remaining time range of the plurality of remaining time ranges is a remaining time range between zero and a smallest reporting threshold of the plurality of reporting thresholds, and each of other remaining time ranges of the plurality of remaining time ranges is a remaining time range between a preceding reporting threshold and one of the other reporting thresholds.
[0133] In some example embodiments, the number of entries comprised in the status report for each LCG is the same as or less than the number of reporting thresholds comprised in the plurality of reporting thresholds.
[0134] In some example embodiments, each entry further comprises a third field indicating a smallest remaining time of data with remaining time within a respective remaining time range corresponding to the entry.
[0135] In some example embodiments, the configuration information is configured for a logical channel group (LCG) or a user equipment.
[0136] In some example embodiments, the status report is comprised in a medium access control control element (MAC CE) .
[0137] In some example embodiments, the first apparatus is a terminal device and the second apparatus is a network device.
[0138] In some example embodiments, a first apparatus capable of performing any of the method 700 (for example, the first apparatus 110 in FIG. 1) may comprise means for performing the respective operations of the method 700. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module. The first apparatus may be implemented as or included in the first apparatus 110 in FIG. 1.
[0139] In some example embodiments, the first apparatus comprises means for receiving, from a second apparatus, configuration information indicating a plurality of reporting thresholds of remaining time; and means for transmitting, to the second apparatus, the status report comprising a plurality of entries, each entry comprising a first field indicating a buffer size value corresponding to a remaining time range of a plurality of remaining time ranges which are determined based on the plurality of reporting thresholds, and the buffer size value indicating a total size of data units associated with the remaining time range and at least one data unit that is not associated with the remaining time range and is ahead of any data unit of the data units associated with the remaining time range.
[0140] In some example embodiments, a second apparatus capable of performing any of the method 800 (for example, the second apparatus 120 in FIG. 1) may comprise means for performing the respective operations of the method 800. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module. The second apparatus may be implemented as or included in the second apparatus 120 in FIG. 1.
[0141] In some example embodiments, the second apparatus comprises means for transmitting, to a first apparatus, configuration information indicating a plurality of reporting thresholds of remaining time; and means for receiving, from the first apparatus, the status report comprising a plurality of entries, each entry comprising a first field indicating a buffer size value corresponding to a remaining time range of a plurality of remaining time ranges which are determined based on the plurality of reporting thresholds, and the buffer size value indicating a total size of data units associated with the remaining time range and at least one data unit that is not associated with the remaining time range and is ahead of any data unit of the data units associated with the remaining time range.
[0142] FIG. 9 is a simplified block diagram of a device 900 that is suitable for implementing example embodiments of the present disclosure. The device 900 may be provided to implement a communication device, for example, the first apparatus 110 or the second apparatus 120 as shown in FIG. 1. As shown, the device 900 includes one or more processors 910, one or more memories 920 coupled to the processor 910, and one or more communication modules 940 coupled to the processor 910.
[0143] The communication module 940 is for bidirectional communications. The communication module 940 has one or more communication interfaces to facilitate communication with one or more other modules or devices. The communication interfaces may represent any interface that is necessary for communication with other network elements. In some example embodiments, the communication module 940 may include at least one antenna.
[0144] The processor 910 may be of any type suitable to the local technical network and may include one or more of the following: general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples. The device 900 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
[0145] The memory 920 may include one or more non-volatile memories and one or more volatile memories. Examples of the non-volatile memories include, but are not limited to, a Read Only Memory (ROM) 924, an electrically programmable read only memory (EPROM) , a flash memory, a hard disk, a compact disc (CD) , a digital video disk (DVD) , an optical disk, a laser disk, and other magnetic storage and / or optical storage. Examples of the volatile memories include, but are not limited to, a random-access memory (RAM) 922 and other volatile memories that will not last in the power-down duration.
[0146] A computer program 930 includes computer executable instructions that are executed by the associated processor 910. The instructions of the program 930 may include instructions for performing operations / acts of some example embodiments of the present disclosure. The program 930 may be stored in the memory, e.g., the ROM 924. The processor 910 may perform any suitable actions and processing by loading the program 930 into the RAM 922.
[0147] The example embodiments of the present disclosure may be implemented by means of the program 930 so that the device 900 may perform any process of the disclosure as discussed with reference to FIG. 2 to FIG. 8. The example embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.
[0148] In some example embodiments, the program 930 may be tangibly contained in a computer readable medium which may be included in the device 900 (such as in the memory 920) or other storage devices that are accessible by the device 900. The device 900 may load the program 930 from the computer readable medium to the RAM 922 for execution. In some example embodiments, the computer readable medium may include any types of non-transitory storage medium, such as ROM, EPROM, a flash memory, a hard disk, CD, DVD, and the like. The term “non-transitory, ” as used herein, is a limitation of the medium itself (i.e., tangible, not a signal) as opposed to a limitation on data storage persistency (e.g., RAM vs. ROM) .
[0149] FIG. 10 shows an example of the computer readable medium 1000 which may be in form of CD, DVD or other optical storage disk. The computer readable medium 1000 has the program 930 stored thereon.
[0150] Generally, various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, and other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. Although various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representations, it is to be understood that the block, apparatus, system, technique or method described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
[0151] Some example embodiments of the present disclosure also provide at least one computer program product tangibly stored on a computer readable medium, such as a non-transitory computer readable medium. The computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target physical or virtual processor, to carry out any of the methods as described above. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types. The functionality of the program modules may be combined or split between program modules as desired in various embodiments. Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
[0152] Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. The program code may be provided to a processor or controller of a general-purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program code, when executed by the processor or controller, cause the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
[0153] In the context of the present disclosure, the computer program code or related data may be carried by any suitable carrier to enable the device, apparatus or processor to perform various processes and operations as described above. Examples of the carrier include a signal, computer readable medium, and the like.
[0154] The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the computer readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random-access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
[0155] Further, although operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, although several specific implementation details are contained in the above discussions, these should not be construed as limitations on the scope of the present disclosure, but rather as descriptions of features that may be specific to particular embodiments. Unless explicitly stated, certain features that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, unless explicitly stated, various features that are described in the context of a single embodiment may also be implemented in a plurality of embodiments separately or in any suitable sub-combination.
[0156] Although the present disclosure has been described in languages specific to structural features and / or methodological acts, it is to be understood that the present disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims
1.A first apparatus, comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the first apparatus to:receive, from a second apparatus, configuration information indicating a plurality of reporting thresholds of remaining time; andtransmit, to the second apparatus, the status report comprising a plurality of entries, each entry comprising a first field indicating a buffer size value corresponding to a remaining time range of a plurality of remaining time ranges which are determined based on the plurality of reporting thresholds, and the buffer size value indicating a total size of data units associated with the remaining time range and at least one data unit that is not associated with the remaining time range and is ahead of any data unit of the data units associated with the remaining time range.2.The first apparatus of claim 1, wherein the data units further comprise data units of another data unit set to which the at least one data unit belongs.3.The first apparatus of claim 1 or 2, wherein the data units exclude one or more data units that are associated with the remaining time range and have been reported in another entry associated with another remaining time range.4.The first apparatus of any of claims 1-3, wherein the entry comprises a second field indicating an importance related to the data units.5.The first apparatus of claim 4, wherein the second field comprises an indication that the buffer size value associated with the remaining time range at least includes high importance data units.6.The first apparatus of claim 4, wherein the second field comprises an indication that the buffer size value associated with the remaining time range includes high importance data units and low importance data units.7.The first apparatus of claim 4, wherein the second field comprises an indication that the buffer size value associated with the remaining time range includes low importance data units.8.The first apparatus of any of claims 1-7, wherein the configuration information indicates:first information on a triggering threshold of remaining time for the status report, andsecond information on the plurality of reporting thresholds.9.The first apparatus of any of claims 1-8, wherein each of the plurality of remaining time ranges is a remaining time range between zero and one of the plurality of reporting thresholds.10.The first apparatus of any of claims 1-8, wherein a first remaining time range of the plurality of remaining time ranges is a remaining time range between zero and a smallest reporting threshold of the plurality of reporting thresholds, andeach of other remaining time ranges of the plurality of remaining time ranges is a remaining time range between a preceding reporting threshold and one of the other reporting thresholds.11.The first apparatus of any of claims 1-10, wherein the number of entries comprised in the status report for each logical channel group (LCG) is the same as or less than the number of reporting thresholds comprised in the plurality of reporting thresholds.12.The first apparatus of any of claims 1-11, wherein each entry further comprises a third field indicating a smallest remaining time of data with remaining time within a respective remaining time range corresponding to the entry.13.The first apparatus of any of claims 1-12, wherein the configuration information is configured for a logical channel group (LCG) or a user equipment.14.The first apparatus of any of claims 1-13, wherein the status report is comprised in a medium access control control element (MAC CE) .15.The first apparatus of any of claims 1-14, wherein the first apparatus is a terminal device and the second apparatus is a network device.16.A second apparatus, comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the second apparatus to:transmit, to a first apparatus, configuration information indicating a plurality of reporting thresholds of remaining time; andreceive, from the first apparatus, the status report comprising a plurality of entries, each entry comprising a first field indicating a buffer size value corresponding to a remaining time range of a plurality of remaining time ranges which are determined based on the plurality of reporting thresholds, and the buffer size value indicating a total size of data units associated with the remaining time range and at least one data unit that is not associated with the remaining time range and is ahead of any data unit of the data units associated with the remaining time range.17.The second apparatus of claim 16, wherein the data units further comprise data units of another data unit set to which the at least one data unit belongs.18.The second apparatus of claim 16 or 17, wherein the data units exclude one or more data units that are associated with the remaining time range and have been reported in another entry associated with another remaining time range.19.The second apparatus of any of claims 16-18, wherein the entry comprises a second field indicating an importance related to the data units.20.The second apparatus of claim 19, wherein the second field comprises an indication that the buffer size value associated with the remaining time range at least includes high importance data units.21.The second apparatus of claim 19, wherein the second field comprises an indication that the buffer size value associated with the remaining time range includes high importance data units and low importance data units.22.The second apparatus of claim 19, wherein the second field comprises an indication that the buffer size value associated with the remaining time range includes low importance data units.23.The second apparatus of any of claims 16-22, wherein the configuration information indicates:first information on a triggering threshold of remaining time for the status report, andsecond information on the plurality of reporting thresholds.24.The second apparatus of any of claims 16-23, wherein each of the plurality of remaining time ranges is a remaining time range between zero and one of the plurality of reporting thresholds.25.The second apparatus of any of claims 16-23, wherein a first remaining time range of the plurality of remaining time ranges is a remaining time range between zero and a smallest reporting threshold of the plurality of reporting thresholds, andeach of other remaining time ranges of the plurality of remaining time ranges is a remaining time range between a preceding reporting threshold and one of the other reporting thresholds.26.The second apparatus of any of claims 16-25, wherein the number of entries comprised in the status report for each logical channel group (LCG) is the same as or less than the number of reporting thresholds comprised in the plurality of reporting thresholds.27.The second apparatus of any of claims 16-26, wherein each entry further comprises a third field indicating a smallest remaining time of data with remaining time within a respective remaining time range corresponding to the entry.28.The second apparatus of any of claims 16-27, wherein the configuration information is configured for a logical channel group (LCG) or a user equipment.29.The second apparatus of any of claims 16-28, wherein the status report is comprised in a medium access control control element (MAC CE) .30.The second apparatus of any of claims 16-29, wherein the first apparatus is a terminal device and the second apparatus is a network device.31.A method comprising:receiving, at a first apparatus and from a second apparatus, configuration information indicating a plurality of reporting thresholds of remaining time; andtransmitting, to the second apparatus, the status report comprising a plurality of entries, each entry comprising a first field indicating a buffer size value corresponding to a remaining time range of a plurality of remaining time ranges which are determined based on the plurality of reporting thresholds, and the buffer size value indicating a total size of data units associated with the remaining time range and at least one data unit that is not associated with the remaining time range and is ahead of any data unit of the data units associated with the remaining time range.32.A method comprising:transmitting, at a second apparatus and to a first apparatus, configuration information indicating a plurality of reporting thresholds of remaining time; andreceiving, from the first apparatus, the status report comprising a plurality of entries, each entry comprising a first field indicating a buffer size value corresponding to a remaining time range of a plurality of remaining time ranges which are determined based on the plurality of reporting thresholds, and the buffer size value indicating a total size of data units associated with the remaining time range and at least one data unit that is not associated with the remaining time range and is ahead of any data unit of the data units associated with the remaining time range.33.A first apparatus comprising:means for receiving, from a second apparatus, configuration information indicating a plurality of reporting thresholds of remaining time; andmeans for transmitting, to the second apparatus, the status report comprising a plurality of entries, each entry comprising a first field indicating a buffer size value corresponding to a remaining time range of a plurality of remaining time ranges which are determined based on the plurality of reporting thresholds, and the buffer size value indicating a total size of data units associated with the remaining time range and at least one data unit that is not associated with the remaining time range and is ahead of any data unit of the data units associated with the remaining time range.34.A second apparatus comprising:means for transmitting, to a first apparatus, configuration information indicating a plurality of reporting thresholds of remaining time; andmeans for receiving, from the first apparatus, the status report comprising a plurality of entries, each entry comprising a first field indicating a buffer size value corresponding to a remaining time range of a plurality of remaining time ranges which are determined based on the plurality of reporting thresholds, and the buffer size value indicating a total size of data units associated with the remaining time range and at least one data unit that is not associated with the remaining time range and is ahead of any data unit of the data units associated with the remaining time range.35.A computer readable medium comprising instructions stored thereon for causing an apparatus at least to perform the method of claim 31 or the method of claim 32.
Citation Information
Patent Citations
Buffer status report overhead estimation
CN117616865A
Method and apparatus for transmitting emergency buffer status report in wireless communication system
US20230232277A1
Systems and methods for buffer state reporting and data burst alignment
US20240154915A1
Buffer-status reports with multiple size fields for the same buffer
US20240284248A1