Devices and methods of communication
By determining and transmitting multiple sets of delay information, the enhanced DSR solution addresses the incomplete reporting of current DSR, enabling efficient uplink resource allocation and reducing reporting overhead.
Patent Information
- Application Number
- PCT/CN2024/108847
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2026-02-05
AI Technical Summary
Current DSR functionality is incomplete and does not effectively report multiple pairs of remaining time and buffer size for logical channel groups, leading to inefficient uplink resource allocation by network devices.
A terminal device determines and transmits multiple sets of delay information, including remaining time, amount of delay-critical and non-delay-critical data, importance level, or delay level, to a network device, enhancing the DSR process to provide a comprehensive delay status report.
This approach allows network devices to efficiently allocate uplink resources based on a complete picture of the terminal device's delay status, improving resource management and reducing overhead in delay status reporting.
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Figure CN2024108847_05022026_PF_FP_ABST
Abstract
Description
DEVICES AND METHODS OF COMMUNICATIONTECHNICAL FIELD
[0001] Embodiments of the present disclosure generally relate to the field of telecommunication, and in particular, to methods, devices and computer storage media of communication for a delay status report (DSR) .BACKGROUND
[0002] A network (NW) can schedule an uplink (UL) grant for delay sensitive traffic according to a remaining delay budget and / or a delayed buffer size. Currently, DSR functionality has been specified and a DSR medium access control control element (MAC CE) has been introduced for the DSR functionality. However, a solution of DSR is still incomplete and needs to be further developed.SUMMARY
[0003] In general, embodiments of the present disclosure provide methods, devices and computer storage media of communication for DSR.
[0004] In a first aspect, there is provided a terminal device. The terminal device comprises a processor configured to cause the terminal device to: determine multiple sets of delay information for a logical channel group (LCG) or logical channel (LCH) , the delay information in one of the multiple sets comprising at least one of the following: a remaining time of a packet among packets buffered for the LCG or LCH or for a delay level, amount of delay-critical data or non-delay-critical data for the LCG or LCH or for the delay level, an importance level or an importance level group, or the delay level; and transmit, to a network device, a first DSR comprising the multiple sets of delay information.
[0005] In a second aspect, there is provided a network device. The network device comprises a processor configured to cause the network device to: receive, from a terminal device, a first DSR comprising multiple sets of delay information for a LCG or LCH, the delay information in one of the multiple sets comprising at least one of the following: a remaining time of a packet among packets buffered for the LCG or LCH or for a delay level, amount of delay-critical data or non-delay-critical data for the LCG or LCH or for the delay level, an importance level or an importance level group, or the delay level.
[0006] In a third aspect, there is provided a method of communication. The method is implemented at a terminal device. The method comprises: determining, at a terminal device, multiple sets of delay information for a LCG or LCH, the delay information in one of the multiple sets comprising at least one of the following: a remaining time of a packet among packets buffered for the LCG or LCH or for a delay level, amount of delay-critical data or non-delay-critical data for the LCG or LCH or for the delay level, an importance level or an importance level group, or the delay level; and transmitting, to a network device, a first DSR comprising the multiple sets of delay information.
[0007] In a fourth aspect, there is provided a method of communication. The method is implemented at a network device. The method comprises: receiving, at a network device and from a terminal device, a first DSR comprising multiple sets of delay information for a LCG or LCH, the delay information in one of the multiple sets comprising at least one of the following: a remaining time of a packet among packets buffered for the LCG or LCH or for a delay level, amount of delay-critical data or non-delay-critical data for the LCG or LCH or for the delay level, an importance level or an importance level group, or the delay level.
[0008] In a fifth aspect, there is provided a computer readable medium having instructions stored thereon. The instructions, when executed on at least one processor, cause the at least one processor to perform the method according to the third or fourth aspect of the present disclosure.
[0009] Other features of the present disclosure will become easily comprehensible through the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Through the more detailed description of some embodiments of the present disclosure in the accompanying drawings, the above and other objects, features and advantages of the present disclosure will become more apparent, wherein:
[0011] FIG. 1A illustrates an example communication network in which some embodiments of the present disclosure can be implemented;
[0012] FIG. 1B illustrates a schematic diagram of a DSR MAC CE according to related technologies;
[0013] FIG. 2 illustrates a signaling chart illustrating an example process of communication according to embodiments of the present disclosure;
[0014] FIG. 3A illustrates a schematic diagram of an example MAC CE for activation or deactivation of DSR according to embodiments of the present disclosure;
[0015] FIG. 3B illustrates a schematic diagram of another example MAC CE for activation or deactivation of DSR according to embodiments of the present disclosure;
[0016] FIG. 4A illustrates a schematic diagram of another example MAC CE for activation or deactivation of DSR according to embodiments of the present disclosure;
[0017] FIG. 4B illustrates a schematic diagram of another example MAC CE for activation or deactivation of DSR according to embodiments of the present disclosure;
[0018] FIG. 5A illustrates a schematic diagram of another example MAC CE for activation or deactivation of DSR according to embodiments of the present disclosure;
[0019] FIG. 5B illustrates a schematic diagram of another example MAC CE for activation or deactivation of DSR according to embodiments of the present disclosure;
[0020] FIG. 6A illustrates a schematic diagram of another example MAC CE for activation or deactivation of DSR according to embodiments of the present disclosure;
[0021] FIG. 6B illustrates a schematic diagram of another example MAC CE for activation or deactivation of DSR according to embodiments of the present disclosure;
[0022] FIG. 7A illustrates a schematic diagram of another example MAC CE for activation or deactivation of DSR according to embodiments of the present disclosure;
[0023] FIG. 7B illustrates a schematic diagram of another example MAC CE for activation or deactivation of DSR according to embodiments of the present disclosure;
[0024] FIG. 7C illustrates a schematic diagram of another example MAC CE for activation or deactivation of DSR according to embodiments of the present disclosure;
[0025] FIG. 8 illustrates a schematic diagram of an example DSR MAC CE according to embodiments of the present disclosure;
[0026] FIG. 9 illustrates a flowchart of an example method of communication implemented at a terminal device in accordance with some embodiments of the present disclosure;
[0027] FIG. 10 illustrates a flowchart of an example method of communication implemented at a network device in accordance with some embodiments of the present disclosure; and
[0028] FIG. 11 is a simplified block diagram of a device that is suitable for implementing embodiments of the present disclosure.
[0029] Throughout the drawings, the same or similar reference numerals represent the same or similar element.DETAILED DESCRIPTION
[0030] Principle of the present disclosure will now be described with reference to some 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 limitations as to the scope of the disclosure. The disclosure described herein can be implemented in various manners other than the ones described below.
[0031] 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.
[0032] As used herein, the term ‘terminal device’ refers to any device having wireless or wired communication capabilities. Examples of the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs) , portable computers, tablets, wearable devices, Internet of things (IoT) devices, ultra-reliable and low latency communications (URLLC) devices, Internet of everything (IoE) devices, machine type communication (MTC) devices, device on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure / network, devices for integrated access and backhaul (IAB) , space borne vehicles or air borne vehicles in non-terrestrial networks (NTN) including satellites and high altitude platforms (HAPs) encompassing unmanned aircraft systems (UAS) , extended reality (XR) devices including different types of realities such as augmented reality (AR) , mixed reality (MR) and virtual reality (VR) , the unmanned aerial vehicle (UAV) commonly known as a drone which is an aircraft without any human pilot, devices on high speed train (HST) , or image capture devices such as digital cameras, sensors, gaming devices, music storage and playback appliances, or Internet appliances enabling wireless or wired Internet access and browsing and the like. The ‘terminal device’ can further has ‘multicast / broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4 / IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may also incorporate one or multiple subscriber identity module (SIM) as known as multi-SIM. The term ‘terminal device’ can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal or a wireless device.
[0033] As used herein, the term ‘network device’ refers to a device which is capable of providing or hosting a cell or coverage where terminal devices can communicate. Examples of a network device include, but not limited to, a Node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNB) , a transmission reception point (TRP) , a remote radio unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an IAB node, a low power node such as a femto node, a pico node, a reconfigurable intelligent surface (RIS) , and the like.
[0034] The terminal device or the network device may have artificial intelligence (AI) or machine learning (ML) capability. It generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
[0035] The terminal device or the network device may work on several frequency ranges, e.g., FR1 (410 MHz to 7125 MHz) , FR2 (24.25GHz to 71GHz) , frequency band larger than 100GHz as well as Tera Hertz (THz) . It can further work on licensed / unlicensed / shared spectrum. The terminal device may have more than one connection with the network devices under multi-radio dual connectivity (MR-DC) application scenario. The terminal device or the network device can work on full duplex, flexible duplex and cross division duplex modes.
[0036] The embodiments of the present disclosure may be performed in test equipment, e.g., signal generator, signal analyzer, spectrum analyzer, network analyzer, test terminal device, test network device, channel emulator.
[0037] In one embodiment, the terminal device may be connected with a first network device and a second network device. One of the first network device and the second network device may be a master node and the other one may be a secondary node. The first network device and the second network device may use different radio access technologies (RATs) . In one embodiment, the first network device may be a first RAT device and the second network device may be a second RAT device. In one embodiment, the first RAT device is eNB and the second RAT device is gNB. Information related with different RATs may be transmitted to the terminal device from at least one of the first network device or the second network device. In one embodiment, information A may be transmitted to the terminal device from the first network device and information B may be transmitted to the terminal device from the second network device directly or via the first network device. In one embodiment, information related with configuration for the terminal device configured by the second network device may be transmitted from the second network device via the first network device. Information related with reconfiguration for the terminal device configured by the second network device may be transmitted to the terminal device from the second network device directly or via the first network device.
[0038] 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. The term ‘includes’ and its variants are to be read as open terms that mean ‘includes, but is not limited to. ’ The term ‘based on’ is to be read as ‘at least in part based on. ’ The term ‘one embodiment’ and ‘an embodiment’ are to be read as ‘at least one embodiment. ’ The term ‘another embodiment’ is to be read as ‘at least one other embodiment. ’ The terms ‘first, ’ ‘second, ’ and the like may refer to different or same objects. The term ‘and / or’ indicates that there may be three relationships. For example, A and / or B may indicate cases includes ‘only A’ , ‘both A and B’ , and ‘only B’ . The term ‘at least one of the following items’ or a similar expression thereof refers to any combination of these items, including any combination of a single item or a plurality of items. For example, ‘at least one of A, B, or C’ may represent A, B, C, ‘A and B’ , ‘A and C’ , ‘B and C’ , or ‘A, B and C’ . Other definitions, explicit and implicit, may be included below.
[0039] In some examples, values, procedures, or apparatus are referred to as ‘best, ’ ‘lowest, ’ ‘highest, ’ ‘minimum, ’ ‘maximum, ’ or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
[0040] In the context of the present disclosure, the term ‘areporting of a status of delayed data’ herein may be interchangeably used with ‘adelay status report’ . In the context of the present disclosure, the term ‘delayed data’ may refer to data whose remaining delay budget is lower than a threshold. The term ‘delayed data’ may be interchangeably used with ‘delay-critical data’ .
[0041] In the context of the present disclosure, the term ‘aremaining delay budget’ may be interchangeably used with ‘aremaining delay time’ or ‘aremaining time’ . The remaining delay time may refer to a remaining time of a discard timer for a packet. In the context of the present disclosure, the term ‘apacket’ may refer to a PDCP service data unit (SDU) or protocol data unit (PDU) . The term ‘apacket’ may be interchangeably used with ‘PDCP SDU’ or ‘PDCP PDU’ .
[0042] In the context of the present disclosure, a PDU set is composed of one or more PDUs carrying payload of one unit of information generated at an application level (e.g., a frame or video slice for XR services) . In some implementations, all PDUs in a PDU set are needed by an application layer to use the corresponding unit of information. In other implementations, the application layer may still recover parts or all of the unit of information, when some PDUs are missing.
[0043] Current DSR has a limitation that when multiple PDU sets in a LCG have different remaining times, only the smallest remaining time below a threshold is reported. Therefore, a DSR MAC CE does not provide a full picture of a buffer of a terminal device and hence a network device may not be able to efficiently assign uplink resources in response to a received DSR.
[0044] To relax the limitation, it has been agreed to enhance DSR to report with multiple pairs of remaining time and buffer size for a LCG. Furthermore, impact on a legacy DSR should also be considered.
[0045] In view of this, embodiments of the present disclosure provide a solution of communication for DSR (also referred to as an enhanced DSR herein) so as to overcome the above and other potential issues. In the solution, a terminal device determines multiple sets of delay information for a LCG or LCH and transmits a DSR (also referred to as a first DSR herein) comprising the multiple sets of delay information. The delay information in one of the multiple sets comprises at least one of the following: a remaining time of a packet among packets buffered for the LCG or LCH or for a delay level; amount of delay-critical data or non-delay-critical data for the LCG or LCH or for the delay level; an importance level or an importance level group; or the delay level. In this way, the whole picture of delay status may be reported to NW and a procedure of an enhanced DSR may be introduced.
[0046] Principles and implementations of the present disclosure will be described in detail below with reference to the figures.
[0047] EXAMPLE OF COMMUNICATION NETWORK
[0048] FIG. 1A illustrates a schematic diagram of an example communication network 100A in which some embodiments of the present disclosure can be implemented. As shown in FIG. 1A, the communication network 100A may include a terminal device 110 and a network device 120. In some embodiments, the terminal device 110 may be served by the network device 120.
[0049] It is to be understood that the numbers of terminal devices and network devices in FIG. 1A are given for the purpose of illustration without suggesting any limitations to the present disclosure. The communication network 100A may include any suitable number of network devices and / or terminal devices adapted for implementing implementations of the present disclosure.
[0050] As shown in FIG. 1A, the terminal device 110 may communicate with the network device 120 via a channel such as a wireless communication channel. The communications in the communication network 100A may conform to any suitable standards including, but not limited to, global system for mobile communications (GSM) , long term evolution (LTE) , LTE-evolution, LTE-advanced (LTE-A) , new radio (NR) , wideband code division multiple access (WCDMA) , code division multiple access (CDMA) , GSM EDGE radio access network (GERAN) , machine type communication (MTC) and the like. The embodiments of the present disclosure may be performed according to any generation communication protocols either currently known or to be developed in the future. Examples of the communication protocols include, 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, 5.5G, 5G-advanced networks, or the sixth generation (6G) networks.
[0051] FIG. 1B illustrates a schematic diagram of a DSR MAC CE 100B according to related technologies. The DSR MAC CE 100B is called as a legacy DSR MAC CE herein. DSR using the DSR MAC CE 100B is called as a legacy DSR or a second DSR herein.
[0052] As shown in FIG. 1B, the DSR MAC CE 100B may comprise a LCGi field 101, where i = 0 to 7. The LCGi field indicates presence of delay information (i.e., Remaining Time and Buffer Size fields) for LCG i. The LCGi field set to 1 indicates that the delay information for the LCG i is reported. The LCGi field set to 0 indicates that the delay information for the LCG i is not reported.
[0053] As shown in FIG. 1B, the DSR MAC CE 100B may comprise a BT field 102. The BT field is present only if a corresponding LCG is configured with an additional buffer size table (e.g., an information element (IE) ‘additionalBS-TableAllowed’ ) and a buffer size indicated by a corresponding Buffer Size field is not zero; otherwise, the BT field is reserved and set to 0. If present, the BT field set to 1 indicates that specified buffer sizes are used to set a value of the Buffer Size field, while the BT field set to 0 indicates that the specified buffer sizes are used instead.
[0054] As shown in FIG. 1B, the DSR MAC CE 100B may comprise a R field 103. The R field indicates a reserved bit.
[0055] As shown in FIG. 1B, the DSR MAC CE 100B may comprise a Remaining Time field 104. The Remaining Time field indicates the shortest remaining value of running PDCP discard timer among all PDCP SDUs that are buffered for an LCG but have not been transmitted in any MAC PDU, at the time of the first symbol of the first PUSCH transmission that includes this DSR MAC CE.
[0056] As shown in FIG. 1B, the DSR MAC CE 100B may comprise a Buffer Size field 105. The Buffer Size field indicates the total amount of delay-critical data for an LCG according to a data volume calculation procedure for associated RLC and PDCP entities, respectively, after a MAC PDU has been built.
[0057] It is to be understood that in the example of FIG. 1B, delay information of only m LCGs is reported, where m ≤ 8.
[0058] It can be seen that the legacy DSR MAC CE is designed for reporting one pair of remaining time and buffer size for a LCG. Thus, it is still unclear how to report multiple pairs of remaining time and buffer size for a LCG.
[0059] Embodiments of the present disclosure provide a solution of enhanced DSR so as to support reporting of multiple sets of delay information for a LCG or LCH. The solution will be described in detail with reference to FIGs. 2 to 8C.
[0060] In the context of the present disclosure, the term ‘multiple sets of delay information’ may refer to multiple pairs of delay information or multiple levels of delay information. The term ‘multiple sets of delay information’ may also be interchangeably used with ‘multi-pair delay status’ . The term ‘asingle set of delay information’ may refer to one pair of delay information or one level of delay information.
[0061] EXAMPLE IMPLEMENTATION OF ENHANCED DSR
[0062] FIG. 2 illustrates a signaling chart illustrating an example process 200 of communication according to embodiments of the present disclosure. For the purpose of discussion, the process 200 will be described with reference to FIG. 1A. The process 200 may involve the terminal device 110 and the network device 120 as illustrated in FIG. 1A. It is to be understood that the steps and the order of the steps in FIG. 2 are merely for illustration, and not for limitation. For example, the order of the steps may be changed. Some of the steps may be omitted or any suitable additional steps may be added.
[0063] As shown in FIG. 2, the network device 120 may transmit 210, to the terminal device 110, a configuration (for convenience, also referred to as a first configuration herein) of a DSR (also referred to as an enhanced DSR or a first DSR herein) comprising multiple sets of delay information for a LCG or LCH. The multiple sets of delay information are associated with multiple delay levels.
[0064] In some embodiments, the configuration may indicate multiple remaining time thresholds for the multiple delay levels. The multiple remaining time thresholds are used to define the multiple delay levels. In some embodiments, data of the lowest delay level in the multiple delay levels may comprise at least one of the following: data with low importance; or data with remaining time larger than or equal to a threshold.
[0065] For example, 2 remaining time thresholds (denoted as T1 and T2 herein) may be configured, and 3 delay levels may be divided as below:
[0066] 1) urgent delayed data (e.g., delay level 1) : remaining delay budget (e.g., remaining time of PDCP discard timer) < T1, or delay > T1;
[0067] 2) non-urgent delayed data (e.g., delay level 2) : T1 ≤ remaining delay budget < T2, or T2 <delay ≤ T1; and
[0068] 3) non-delayed data or remaining data (e.g., delay level 3, or the lowest delay level, or configured to ‘infinity’ or any other suitable values) including at least one of: a) remaining delay budget ≥ T2, or delay ≤ T2; and / or b) data with low importance. In this example, delay critical buffer size may include data volume of delay level 1 and delay level 2. It is to be noted that more or less delay levels may also be feasible. The term ‘the lowest delay level’ herein may indicate remaining data except other delay levels (e.g., except delay levels 1 and 2) . The term ‘the lowest delay level’ may be interchangeably used with ‘the last delay level’ or ‘the least delay level’ .
[0069] Alternatively, the multiple delay levels may be predefined. In some embodiments, a delay level table may be introduced, and the delay level table may comprise a mapping between indexes and data of delay levels. For example, the delay level table may comprise multiple entries, and each entry in the table may correspond to a delay range or remaining time range.
[0070] For illustration, an example delay level table is shown in Table 1 below. For example, index 5 of Table 1 corresponds to a remaining delay range [6, 8) ms (e.g., 6ms ≤remaining time of PDCP discard timer < 8ms) or (6, 8] ms (e.g., 6ms < remaining time of PDCP discard timer ≤ 8ms) , and so on.
[0071] Table 1
[0072] Another example delay level table is shown in Table 2 below.
[0073] Table 2
[0074] It is to be noted that for a reported buffer size corresponding to index15 of Table 1 or index7 of Table 2 (e.g., the lowest delay level) , the reported buffer size may comprise at least one of the following: 1) data with low importance; or 2) data with remaining time larger than or equal to a threshold.
[0075] In some embodiments, the first configuration of the first DSR may indicate a DSR MAC CE (i.e., enhanced DSR MAC CE) used for the first DSR. More details of the enhanced DSR MAC CE will be described later in connection with FIG. 8.
[0076] It is to be noted that the first configuration of the first DSR may comprise any suitable information, and the present disclosure does not limit this aspect.
[0077] As shown in FIG. 2, the network device 120 may transmit 220, to the terminal device 110, a configuration (for convenience, also referred to as a second configuration herein) of a DSR (also referred to as a legacy DSR or a second DSR herein) comprising a single set of delay information for a LCG. For example, the second DSR may comprise one pair of remaining time and buffer size for a LCG.
[0078] In some embodiments, the second configuration of the second DSR may indicate a DSR MAC CE (i.e., legacy DSR MAC CE) used for the second DSR. More details of the legacy DSR MAC CE are described in connection with FIG. 1B and are not repeated here.
[0079] It is to be noted that the second configuration of the second DSR may comprise any suitable information, and the present disclosure does not limit this aspect.
[0080] Continuing to refer to FIG. 2, the network device 120 may transmit 230, to the terminal device 110, an indication indicating whether the first DSR is to be reported. In some embodiments, the indication may indicate whether the first DSR is to be reported for a LCH or LCG or data radio bearer (DRB) or cell or medium access control (MAC) entity or cell group or terminal device.
[0081] In some embodiments, the network device 120 may transmit the indication via a radio resource control (RRC) signaling. In some embodiments, the terminal device 110 may determine that the first DSR is initially deactivated upon configuration or reconfiguration by upper layers. In some embodiments, the terminal device 110 may determine that the first DSR is initially deactivated after reconfiguration with sync.
[0082] In some embodiments, the network device 120 may transmit the indication via a MAC CE (e.g., Multi-pair DSR Activation / Deactivation MAC CE) . In some embodiments, the MAC CE may indicate an activation or deactivation status of the first DSR for a LCH or LCG or DRB or cell or MAC entity or cell group or terminal device.
[0083] In some embodiments, the MAC CE may comprise a field indicating the activation or deactivation status of the first DSR for the LCG or LCH or DRB or cell or MAC entity or cell group or terminal device. In some embodiments, the MAC CE may comprise a bitmap indicating the activation or deactivation status of the first DSR for a set of LCGs or LCHs or DRBs or cells or MAC entities or cell groups or terminal device. Each bit of the bitmap corresponds to the activation or deactivation status of a specific LCH or LCG or DRB or cell or MAC entity or cell group or terminal device. In some embodiments, the MAC CE may comprise an index of a LCG or LCH or DRB or cell or MAC entity or cell group or terminal device whose first DSR is activated or deactivated. In some embodiments, a MAC subheader with a logical channel identity (LCID) or extended LCID (eLCID) value (i.e., a new LCID or eLCID value) may be introduced to identify the MAC CE. For illustration, some example MAC CEs will be described in connection with FIGs. 3A to 7C.
[0084] In some embodiments, the network device 120 may activate or deactivate the first DSR per DRB. In some embodiments, the MAC CE may comprise a field indicating the activation or deactivation status of the first DSR for a DRB and a field indicating an ID of the DRB for which the first DSR applies. FIG. 3A illustrates a schematic diagram of an example MAC CE 300A according to embodiments of the present disclosure. As shown in FIG. 3A, a field ‘DRB ID’ indicates an ID of a DRB for which the MAC CE applies, a field ‘A / D’ indicates the activation or deactivation status of the first DSR for a corresponding DRB, and fields ‘R’ indicate reserved bits. For example, the field ‘A / D’ is set to 1 to indicate that the first DSR shall be activated for a corresponding DRB, and set to 0 to indicate that the first DSR shall be deactivated for the corresponding DRB.
[0085] In some alternative embodiments, the MAC CE may comprise a set of fields corresponding to a set of DRBs. A field in the set of fields may indicate the activation or deactivation status of the first DSR for a corresponding DRB. FIG. 3B illustrates a schematic diagram of another example MAC CE 300B according to embodiments of the present disclosure. As shown in FIG. 3B, a field ‘Di’ indicates the activation or deactivation status of the first DSR of DRB i, where i denotes an ascending order of an ID of the DRB among DRBs configured with the first DSR. In this example, i = 0 to 7. The field Di may be set to 1 to indicate that the first DSR of DRB i shall be activated. The field Di may be set to 0 to indicate that the first DSR of DRB i shall be deactivated. It is to be noted that any other suitable values may also be adopted for the field Di.
[0086] In some embodiments, the network device 120 may activate or deactivate the first DSR per LCG. In some embodiments, the MAC CE may comprise a field indicating the activation or deactivation status of the first DSR for a LCG and a field indicating an ID of the LCG for which the first DSR applies. FIG. 4A illustrates a schematic diagram of an example MAC CE 400A according to embodiments of the present disclosure. As shown in FIG. 4A, a field ‘LCG ID’ indicates an ID of a LCG for which the MAC CE applies, a field ‘A / D’ indicates the activation or deactivation status of the first DSR for a corresponding LCG, and fields ‘R’ indicate reserved bits. For example, the field ‘A / D’ is set to 1 to indicate that the first DSR shall be activated for a corresponding LCG, and set to 0 to indicate that the first DSR shall be deactivated for the corresponding LCG.
[0087] In some alternative embodiments, the MAC CE may comprise a set of fields corresponding to a set of LCGs. A field in the set of fields may indicate the activation or deactivation status of the first DSR for a corresponding LCG. FIG. 4B illustrates a schematic diagram of another example MAC CE 400B according to embodiments of the present disclosure. As shown in FIG. 4B, a field ‘LCGi’ indicates the activation or deactivation status of the first DSR of LCG i, where i denotes an ascending order of an ID of the LCG among LCGs configured with the first DSR. In this example, i = 0 to 7. The field LCGi may be set to 1 to indicate that the first DSR of LCG i shall be activated. The field LCGi may be set to 0 to indicate that the first DSR of LCG i shall be deactivated. It is to be noted that any other suitable values may also be adopted for the field LCGi.
[0088] In some embodiments, the network device 120 may activate or deactivate the first DSR per cell. In some embodiments, the MAC CE may comprise a field indicating the activation or deactivation status of the first DSR for a cell and a field indicating an ID of the cell for which the first DSR applies. FIG. 5A illustrates a schematic diagram of an example MAC CE 500A according to embodiments of the present disclosure. As shown in FIG. 5A, a field ‘Serving Cell ID’ indicates an ID of a cell for which the MAC CE applies, a field ‘A / D’ indicates the activation or deactivation status of the first DSR for the cell, and fields ‘R’ indicate reserved bits. For example, the field ‘A / D’ is set to 1 to indicate that the first DSR shall be activated for the cell, and set to 0 to indicate that the first DSR shall be deactivated for the cell.
[0089] In some alternative embodiments, the MAC CE may comprise a set of fields corresponding to a set of cells. A field in the set of fields may indicate the activation or deactivation status of the first DSR for a corresponding cell. FIG. 5B illustrates a schematic diagram of another example MAC CE 500B according to embodiments of the present disclosure. As shown in FIG. 5B, a field ‘Ci’ indicates the activation or deactivation status of the first DSR of a corresponding cell i, else the MAC entity shall ignore the field ‘Ci’ (e.g., a special cell (SpCell) with i = 0 or a secondary cell (SCell) configured for the MAC entity with SCell Index i) . In this example, i = 0 to 7. The field Ci may be set to 1 to indicate that the first DSR of the corresponding cell i (e.g., SpCell with i = 0 or SCell with SCell Index i) shall be activated. The field Ci may be set to 0 to indicate that the first DSR of the corresponding cell i (e.g., SpCell with i = 0 or SCell with SCell Index i) shall be deactivated. It is to be noted that any other suitable values may also be adopted for the field Ci.
[0090] In some embodiments, the network device 120 may activate or deactivate the first DSR per LCH. In some embodiments, the MAC CE may comprise a field indicating the activation or deactivation status of the first DSR for a LCH and a field indicating an ID of the LCH for which the first DSR applies. FIG. 6A illustrates a schematic diagram of an example MAC CE 600A according to embodiments of the present disclosure. As shown in FIG. 6A, a field ‘LCH ID’ indicates an ID of a LCH for which the MAC CE applies, a field ‘A / D’ indicates the activation or deactivation status of the first DSR for a corresponding LCH, and fields ‘R’ indicate reserved bits. For example, the field ‘A / D’ is set to 1 to indicate that the first DSR shall be activated for a corresponding LCH, and set to 0 to indicate that the first DSR shall be deactivated for the corresponding LCH.
[0091] In some alternative embodiments, the MAC CE may comprise a set of fields corresponding to a set of LCHs. A field in the set of fields may indicate the activation or deactivation status of the first DSR for a corresponding LCH. FIG. 6B illustrates a schematic diagram of another example MAC CE 600B according to embodiments of the present disclosure. As shown in FIG. 6B, a field ‘LCHi’ indicates the activation or deactivation status of the first DSR of LCH i, where i denotes an ascending order of an ID of the LCH among LCHs configured with the first DSR. In this example, i = 0 to 7. The field LCHi may be set to 1 to indicate that the first DSR of LCH i shall be activated. The field LCHi may be set to 0 to indicate that the first DSR of LCH i shall be deactivated. It is to be noted that any other suitable values may also be adopted for the field LCHi.
[0092] In some embodiments, the network device 120 may activate or deactivate the first DSR per MAC entity or terminal device. In some embodiments, the MAC CE may comprise a field indicating the activation or deactivation status of the first DSR for a MAC entity or terminal device. FIG. 7A illustrates a schematic diagram of an example MAC CE 700A according to embodiments of the present disclosure. As shown in FIG. 7A, a field ‘A / D’ indicates the activation or deactivation status of the first DSR for a MAC entity or terminal device, and fields ‘R’ indicate reserved bits. For example, the field ‘A / D’ is set to 1 to indicate that the first DSR shall be activated for the MAC entity or terminal device, and set to 0 to indicate that the first DSR shall be deactivated for the MAC entity or terminal device.
[0093] Alternatively or additionally, a MAC subheader only may be defined to activate or deactivate the first DSR. In some embodiments, the MAC subheader may comprise a LCID value identifying a MAC CE for activating or deactivating the first DSR. FIG. 7B illustrates a schematic diagram of another example MAC CE 700B according to embodiments of the present disclosure. As shown in FIG. 7B, a field ‘A / D’ indicates the activation or deactivation status of the first DSR, a field ‘LCID’ indicates that a corresponding MAC CE is used for activation or deactivation of the first DSR, and fields ‘R’ indicate reserved bits. For example, the field ‘A / D’ is set to 1 to indicate that the first DSR shall be activated, and set to 0 to indicate that the first DSR shall be deactivated.
[0094] In some embodiments, the MAC subheader may comprise an eLCID value identifying a MAC CE for activating or deactivating the first DSR. FIG. 7C illustrates a schematic diagram of another example MAC CE 700C according to embodiments of the present disclosure. As shown in FIG. 7C, a field ‘A / D’ indicates the activation or deactivation status of the first DSR, fields ‘LCID’ and ‘eLCID’ indicate that a corresponding MAC CE is used for activation or deactivation of the first DSR, and fields ‘R’ indicate reserved bits. For example, the field ‘A / D’ is set to 1 to indicate that the first DSR shall be activated, and set to 0 to indicate that the first DSR shall be deactivated.
[0095] With the indication for activation or deactivation of the first DSR, the network device 120 may dynamically indicate the terminal device 110 whether to report a legacy DSR or an enhanced DSR. In this way, multi-pair delay status reporting is only reported when needed, and thus overhead of delay status reporting may be reduced.
[0096] Continuing to refer to FIG. 2, the terminal device 110 may determine 240 the multiple sets of delay information for a LCG or LCH. In some embodiments, the delay information in one of the multiple sets (i.e., each set of delay information) may comprise at least one of the following: a remaining time of a packet among packets buffered for the LCG or LCH or for a delay level; amount of delay-critical data or non-delay-critical data for the LCG or LCH or for the delay level; an importance level or an importance level group; or the delay level.
[0097] With reference to FIG. 2, the terminal device 110 may transmit 250, to the network device 120, the first DSR comprising the multiple sets of delay information. In some embodiments, the terminal device 110 may transmit a MAC CE for the first DSR, i.e., an enhanced DSR MAC CE.
[0098] In some embodiments, the enhanced DSR MAC CE may comprise a field indicating a type of delay information for the LCG or LCH. An example of the enhanced DSR MAC CE is shown in FIG. 8. FIG. 8 illustrates a schematic diagram of an example DSR MAC CE 800 according to embodiments of the present disclosure. As shown in FIG. 8, the DSR MAC CE 800 may comprise a field LCGi 801 which indicates a type of delay information for a LCG i. In this example, i = 0 to 7.
[0099] In some embodiments, this field LCGi may indicate whether multiple sets of delay information or a single set of delay information is reported for the LCG or LCH. In some embodiments, this field LCGi may indicate whether the multiple sets of delay information are reported. For illustration, example values of this field LCGi may be described in Table 3 below.
[0100] Table 3
[0101] In some embodiments, the enhanced DSR MAC CE may comprise a field indicating the importance level or the importance level group. In some embodiments, one or more importance levels may be reported together (e.g., in a group) . For example, data with low importance (or the importance below an importance threshold) may be reported together. In some embodiments, the data with low importance (or the importance below an importance threshold) may be reported in the same set of delay information. In some embodiments, a combined buffer size may be reported for the data with low importance (or the importance below an importance threshold) . In some embodiments, only delay information of high importance may be reported. In the example of FIG. 8, this field indicating the importance level or the importance level group is not shown.
[0102] In some embodiments, the enhanced DSR MAC CE may comprise a field indicating the delay level or an index of the delay level or an index of a delay level table. As shown in FIG. 8, the DSR MAC CE 800 may comprise a field ‘Delay level’ 802 which indicates the delay level or an index of the delay level or an index of a delay level table. In this example, m sets of delay information are reported for a LCG, and each set comprise a corresponding field ‘Delay level’ . That is, m delay levels are reported for a LCG.
[0103] In some embodiments, the enhanced DSR MAC CE may comprise a field indicating whether a set of delay information follows. As shown in FIG. 8, the DSR MAC CE 800 may comprise a field ‘E’ 803 which indicates whether a set of delay information follows. In this example, m sets of delay information are reported for a LCG, and each set comprises a corresponding field ‘E’ . For example, the field ‘E’ in each of 1st to m-1th sets of delay information may indicate a set of delay information follows, and the field ‘E’ in mth set of delay information may indicate no set of delay information follows.
[0104] In some embodiments, the enhanced DSR MAC CE may comprise a field indicating the shortest remaining value of a running PDCP discard timer among all packets that are buffered for the LCG or LCH. In some embodiments, this field may be reported for each delay level. As shown in FIG. 8, the DSR MAC CE 800 may comprise a field ‘Remaining Time’ 804 which indicates the shortest remaining value of a running PDCP discard timer among all packets that are buffered for a LCG. In this example, m sets of delay information are reported for a LCG, and each set comprises a corresponding field ‘Remaining Time’ . That is, a remaining time is reported for each delay level of a LCG.
[0105] In some embodiments, the enhanced DSR MAC CE may comprise a field indicating a total amount of uplink data or delay-critical uplink data or non-delay-critical uplink data for the LCG or LCH or the delay level. As shown in FIG. 8, the DSR MAC CE 800 may comprise a field ‘Buffer Size’ 805 which indicates the total amount of uplink data or delay-critical uplink data or non-delay-critical uplink data for a delay level. In this example, m sets of delay information are reported for a LCG, and each set comprises a corresponding field ‘Buffer Size’ . That is, a buffer size is reported for each delay level of a LCG.
[0106] In the example of FIG. 8, the DSR MAC CE 800 may comprise a field ‘BT1’ 806 and fields ‘R’ 807. The field ‘BT1’ may have the same meaning as the BT field 102 in FIG. 1B, and thus not be repeated here for conciseness. The fields ‘R’ indicates reserved bits.
[0107] It is to be noted that FIG. 8 is merely an example, and any other suitable ways may also be feasible for the enhanced DSR MAC CE.
[0108] In some embodiments, a scheduling request (SR) may be triggered by the transmission of the first DSR. In some embodiments, the terminal device 110 may consider a SR configuration of the LCH that triggered the first DSR as a SR configuration for a SR triggered by the first DSR.
[0109] In some embodiments, the terminal device 110 may stop an ongoing random access procedure due to a pending SR for the first DSR based on at least one of the following: a MAC PDU is transmitted using a first uplink (UL) grant other than a UL grant provided by a random access response or a UL grant determined for transmission of a MsgA payload, and the MAC PDU comprises a MAC CE for the first DSR; or the first UL grant can accommodate all SDUs associated with the first DSR.
[0110] For illustration, an example procedure may be described as below.
[0111] The MAC entity may stop, if any, ongoing random access procedure due to a pending SR for enhanced DSR, which has no valid PUCCH resources configured, if:
[0112] - a MAC PDU is transmitted using a UL grant other than a UL grant provided by random access response or a UL grant determined for the transmission of the MsgA payload, and this PDU includes an enhanced DSR MAC CE; and / or
[0113] - the UL grant (s) can accommodate all SDUs associated with the enhanced DSR.
[0114] In some embodiments, in accordance with a determination that a SR is triggered by the first DSR and the first DSR has been cancelled, the terminal device 110 may cancel the SR.
[0115] For illustration, an example procedure may be described as below.
[0116] 1> if this SR was triggered by an enhanced DSR procedure and the enhanced DSR that triggered the SR has been cancelled:
[0117] 2> cancel the pending SR and stop the corresponding sr-ProhibitTimer, if running.
[0118] In this example, IE ‘sr-ProhibitTimer’ denotes a prohibit timer for SR.
[0119] Continuing to refer to FIG. 2, the terminal device 110 may coordinate 260 between the first DSR (i.e., the enhanced DSR) and the second DSR (i.e., the legacy DSR) so as to achieve an efficient delay status reporting.
[0120] In some embodiments, if a second DSR is triggered or pending for the LCG or LCH, and the first DSR is triggered, the terminal device 110 may cancel the second DSR.
[0121] In some embodiments, if the first DSR is configured or activated, and there is a second DSR pending or triggered for the LCG or LCH, the terminal device 110 may perform an operation comprising at least one of the following: cancelling the second DSR for the LCG or LCH; or triggering the first DSR for the LCG or LCH.
[0122] In some embodiments, the terminal device 110 may determine that smallest remaining time of a packet among packets buffered for the LCG or LCH becomes lower than or equal to a remaining time threshold, and there is no first DSR or second DSR pending for the LCG or LCH. In this case, if the first DSR is configured or activated, the terminal device 110 may trigger the first DSR for the LCG or LCH.
[0123] For illustration, an example procedure may be described as below.
[0124] If an LCG is configured for delay status reporting and / or multi-pair delay status reporting, the MAC entity shall:
[0125] 1> if the smallest remaining value of the running PDCP discardTimers among all the SDUs buffered for a logical channel or the LCG that has not been transmitted in any MAC PDU and has not been reported as data volume in a DSR MAC CE becomes below remainingTimeThreshold (or a configured threshold) of the LCG; and
[0126] 1> if there is no DSR (e.g., legacy DSR) or no enhanced DSR pending for the logical channel or the LCG:
[0127] 2> If multi-pair delay status reporting is configured or activated,
[0128] 3> trigger an enhanced DSR (e.g., with multi-pair delay status) for the logical channel or the LCG.
[0129] 2> else
[0130] 3> trigger a DSR for the logical channel or the LCG.
[0131] In some embodiments, the terminal device 110 may determine that the smallest remaining time of a packet among packets buffered for the LCG or LCH becomes lower than or equal to a remaining time threshold, and there is no first DSR pending for the LCG or LCH. In this case, if the first DSR (i.e., enhanced DSR) is configured or activated, the terminal device 110 may trigger the first DSR for the LCG or LCH. If there is a second DSR (i.e., legacy DSR) pending for the LCG or LCH, the terminal device 110 may cancel the second DSR.
[0132] For illustration, an example procedure may be described as below.
[0133] If an LCG is configured for delay status reporting and / or multi-pair delay status reporting, the MAC entity shall:
[0134] 1> if the smallest remaining value of the running PDCP discardTimers among all the SDUs buffered for a logical channel or the LCG that has not been transmitted in any MAC PDU and has not been reported as data volume in a DSR MAC CE becomes below remainingTimeThreshold (or a configured threshold) of the LCG; and
[0135] 1> if there is no enhanced DSR pending for the logical channel or the LCG:
[0136] 2> If multi-pair delay status reporting is configured or activated,
[0137] 3> trigger an enhanced DSR (e.g., with multi-pair delay status) for the logical channel or the LCG.
[0138] 3> If there is a DSR (e.g., legacy DSR) pending for the logical channel or the LCG, cancel the DSR.
[0139] 2> else if there is no DSR pending for the logical channel or the LCG,
[0140] 3> trigger a DSR for the logical channel or the LCG.
[0141] Continuing to refer to FIG. 2, in some embodiments, the terminal device 110 may cancel 270 the first DSR (i.e., enhanced DSR) . In some embodiments, after the first DSR is triggered, the first DSR is considered as pending until the first DSR is cancelled.
[0142] In some embodiments, the terminal device 110 may cancel the first DSR based on that all delay-critical SDUs associated with the first DSR have been discarded. In some embodiments, the terminal device 110 may cancel the first DSR based on that a MAC PDU (for convenience, also referred to as a first MAC PDU herein) is transmitted and the MAC PDU comprises a MAC CE (for convenience, also referred to as a first MAC CE herein) that contains delay information of all the delay-critical SDUs associated with the first DSR.
[0143] For example, the MAC entity may cancel a pending enhanced DSR (e.g., for a LCH or LCG) , either when all the delay-critical SDUs (e.g., SDU with remaining value of the running PDCP discard timers below a configured threshold) associated with the enhanced DSR have been discarded, or when a MAC PDU is transmitted and this MAC PDU includes an enhanced DSR MAC CE that contains the delay information of all the delay-critical SDUs associated with the pending enhanced DSR.
[0144] In some embodiments, the terminal device 110 may cancel the first DSR based on that a MAC PDU (for convenience, also referred to as a second MAC PDU herein) is transmitted and the MAC PDU comprises all delay-critical SDUs associated with the first DSR but is not sufficient to include a MAC CE (for convenience, also referred to as a second MAC CE herein) for the first DSR and a subheader of the MAC CE. For example, the MAC entity may cancel a pending enhanced DSR (e.g., for a LCH or LCG) when a MAC PDU is transmitted and this MAC PDU includes all the delay-critical SDUs associated with the enhanced DSR but is not sufficient to include the enhanced DSR MAC CE and its subheader.
[0145] In some embodiments, the terminal device 110 may cancel the first DSR based on that there is no delay-critical data buffered for the first DSR. For example, if there is no delay-critical data buffered for a pending enhanced DSR (e.g., because of discarding or other reasons) , the pending enhanced DSR may be cancelled.
[0146] In some embodiments, a MAC PDU may contain at most one enhanced DSR MAC CE. In some embodiments, if a MAC PDU can accommodate all delay-critical SDUs associated with all pending DSRs, the terminal device 110 may not include a MAC CE (i.e., enhanced DSR MAC CE) for the first DSR in the MAC PDU. In some embodiments, a MAC PDU may contain at most one DSR MAC CE, e.g., the legacy DSR MAC CE or enhanced DSR MAC CE.
[0147] It is to be noted that the delay critical SDUs may correspond to a delay-critical radio link control (RLC) SDU or delay-critical PDCP SDU. If multiple delay levels (or delay budget thresholds) are introduced, the delay critical SDUs may correspond to SDUs with remaining delay budget (e.g., remaining time values of the running PDCP discard timers) below a certain delay level (or delay budget threshold) .
[0148] In some embodiments, if a reset of a MAC entity is to be performed, the terminal device 110 may cancel the first DSR triggered. For illustration, an example procedure may be described as below.
[0149] If a reset of the MAC entity is requested by upper layers or the reset of the MAC entity is triggered due to SCG deactivation, the MAC entity shall:
[0150] 1> cancel, if any, triggered a multi-pair delay status reporting procedure or triggered enhanced DSR.
[0151] So far, an enhanced delay status reporting may be carried out. It is to be understood that operations in the above process 200 may be carried out separately or in any suitable combinations.
[0152] EXAMPLE IMPLEMENTATION OF METHODS
[0153] Corresponding to the above process, embodiments of the present disclosure provide methods of communication implemented at a terminal device and a network device. These methods will be described below with reference to FIGs. 9 and 10.
[0154] FIG. 9 illustrates a flowchart of an example method 900 of communication implemented at a terminal device in accordance with some embodiments of the present disclosure. For example, the method 900 may be performed at the terminal device 110 as shown in FIG. 1A. For the purpose of discussion, in the following, the method 900 will be described with reference to FIG. 1A. It is to be understood that the method 900 may include additional blocks not shown and / or may omit some blocks as shown, and the scope of the present disclosure is not limited in this regard.
[0155] At block 910, the terminal device 110 may determine multiple sets of delay information for a LCG or LCH. In some embodiments, the delay information in one of the multiple sets may comprise at least one of the following: a remaining time of a packet among packets buffered for the LCG or LCH or for a delay level; amount of delay-critical data or non-delay-critical data for the LCG or LCH or for the delay level; an importance level or an importance level group; or the delay level.
[0156] At block 920, the terminal device 110 may transmit, to the network device 120, a first DSR comprising the multiple sets of delay information.
[0157] In some embodiments, the terminal device 110 may transmit the first DSR by transmitting a MAC CE comprising at least one of the following: a field indicating a type of delay information for the LCG or LCH; a field indicating the importance level or the importance level group; a field indicating the delay level or an index of the delay level or an index of a delay level table; or a field indicating whether a set of delay information follows.
[0158] In some embodiments, the delay level table may comprise a mapping between indexes and data of delay levels. Data of a lowest delay level in the delay levels may comprise at least one of the following: data with low importance; or data with remaining time larger than or equal to a threshold.
[0159] In some embodiments, the terminal device 110 may receive, from the network device 120, a configuration indicating multiple remaining time thresholds for multiple delay levels. Data of a lowest delay level in the multiple delay levels may comprise at least one of the following: data with low importance; or data with remaining time larger than or equal to a threshold.
[0160] In some embodiments, if a second DSR is triggered or pending for the LCG or LCH, and the first DSR is triggered, the terminal device 110 may cancel the second DSR.
[0161] In some embodiments, if the first DSR is configured or activated, and there is a second DSR pending or triggered for the LCG or LCH, the terminal device 110 may perform an operation comprising at least one of the following: cancelling the second DSR for the LCG or LCH; or triggering the first DSR for the LCG or LCH.
[0162] In some embodiments, the terminal device 110 may determine that smallest remaining time of a packet among packets buffered for the LCG or LCH becomes lower than or equal to a remaining time threshold, and there is no first DSR or second DSR pending for the LCG or LCH; and in accordance with a determination that the first DSR is configured or activated, trigger the first DSR for the LCG or LCH.
[0163] In some embodiments, the terminal device 110 may determine that smallest remaining time of a packet among packets buffered for the LCG or LCH becomes lower than or equal to a remaining time threshold, and there is no first DSR pending for the LCG or LCH; in accordance with a determination that the first DSR is configured or activated, trigger the first DSR for the LCG or LCH; and in accordance with a determination that there is a second DSR pending for the LCG or LCH, cancel the second DSR.
[0164] In some embodiments, the terminal device 110 may cancel the first DSR based on at least one of the following: all delay-critical SDUs associated with the first DSR have been discarded; a first MAC PDU is transmitted and the first MAC PDU comprises a first MAC CE that contains delay information of all the delay-critical SDUs associated with the first DSR; a second MAC PDU is transmitted and the second MAC PDU comprises all delay-critical SDUs associated with the first DSR but is not sufficient to include a second MAC CE for the first DSR and a subheader of the second MAC CE; or there is no delay-critical data buffered for the first DSR.
[0165] In some embodiments, in accordance with a determination that a MAC PDU can accommodate all delay-critical SDUs associated with all pending DSRs, the terminal device 110 may include no MAC CE for the first DSR in the MAC PDU.
[0166] In some embodiments, in accordance with a determination that a reset of a MAC entity is to be performed, the terminal device 110 may cancel the first DSR triggered.
[0167] In some embodiments, the terminal device 110 may transmit the first DSR by: considering a SR configuration of the LCH that triggered the first DSR as a SR configuration for a SR triggered by the first DSR.
[0168] In some embodiments, the terminal device 110 may stop an ongoing random access procedure due to a pending SR for the first DSR based on at least one of the following: a MAC PDU is transmitted using a first UL grant other than a UL grant provided by a random access response or a UL grant determined for transmission of a MsgA payload, and the MAC PDU comprises a MAC CE for the first DSR; or the first UL grant can accommodate all SDUs associated with the first DSR.
[0169] In some embodiments, in accordance with a determination that a SR is triggered by the first DSR and the first DSR has been cancelled, the terminal device 110 may cancel the SR.
[0170] In some embodiments, the terminal device 110 may receive, from the network device 120, an indication indicating whether the first DSR is to be reported.
[0171] In some embodiments, the terminal device 110 may be further caused to at least one of the following: determine that the first DSR is initially deactivated upon configuration by upper layers; or determine that the first DSR is initially deactivated after reconfiguration with sync.
[0172] In some embodiments, the indication may be a MAC CE. The MAC CE may indicate an activation or deactivation status of the first DSR for the LCG or LCH or a DRB or a cell or a MAC entity or a cell group or the terminal device 110. In some embodiments, the MAC CE may comprise at least one of the following: a field indicating the activation or deactivation status of the first DSR for the LCG or LCH or DRB or cell or MAC entity or cell group or terminal device; a bitmap indicating the activation or deactivation status of the first DSR for a set of LCGs or LCHs or DRBs or cells or MAC entities or cell groups or terminal device; or an index of a LCG or LCH or DRB or cell or MAC entity or cell group or terminal device whose first DSR is activated or deactivated.
[0173] With the method 900, an enhanced delay status reporting may be carried out.
[0174] FIG. 10 illustrates a flowchart of an example method 1000 of communication implemented at a network device in accordance with some embodiments of the present disclosure. For example, the method 1000 may be performed at the network device 120 as shown in FIG. 1A. For the purpose of discussion, in the following, the method 1000 will be described with reference to FIG. 1A. It is to be understood that the method 1000 may include additional blocks not shown and / or may omit some blocks as shown, and the scope of the present disclosure is not limited in this regard.
[0175] At block 1010, the network device 120 may transmit a first DSR comprising multiple sets of delay information for a LCG or LCH. In some embodiments, the delay information in one of the multiple sets may comprise at least one of the following: a remaining time of a packet among packets buffered for the LCG or LCH or for a delay level; amount of delay-critical data or non-delay-critical data for the LCG or LCH or for the delay level; an importance level or an importance level group; or the delay level.
[0176] In some embodiments, the network device 120 may receive the first DSR by receiving a MAC CE comprising at least one of the following: a field indicating a type of delay information for the LCG or LCH; a field indicating the importance level or the importance level group; a field indicating the delay level or an index of the delay level or an index of a delay level table; or a field indicating whether a set of delay information follows.
[0177] In some embodiments, the delay level table may comprise a mapping between indexes and data of delay levels. Data of a lowest delay level in the delay levels may comprise at least one of the following: data with low importance; or data with remaining time larger than or equal to a threshold.
[0178] In some embodiments, the network device 120 may transmit, to the terminal device 110, a configuration indicating multiple remaining time thresholds for multiple delay levels. Data of a lowest delay level in the multiple delay levels may comprise at least one of the following: data with low importance; or data with remaining time larger than or equal to a threshold.
[0179] In some embodiments, the network device 120 may transmit, to the terminal device 110, an indication indicating whether the first DSR is to be reported.
[0180] In some embodiments, the indication may be a MAC CE. The MAC CE may indicate an activation or deactivation status of the first DSR for the LCG or LCH or a DRB or a cell or a MAC entity or a cell group or the terminal device 110. In some embodiments, the MAC CE may comprise at least one of the following: a field indicating the activation or deactivation status of the first DSR for the LCG or LCH or DRB or cell or MAC entity or cell group or terminal device; a bitmap indicating the activation or deactivation status of the first DSR for a set of LCGs or LCHs or DRBs or cells or MAC entities or cell groups or terminal device; or an index of a LCG or LCH or DRB or cell or MAC entity or cell group or terminal device whose first DSR is activated or deactivated.
[0181] With the method 1000, multiple sets of delay information for a LCG or LCH may be obtained and an optimized network configuration may be facilitated.
[0182] It is to be understood that operations of the methods 900 and 1000 correspond to the processes described in connection with FIGs. 2 to 8, and thus other details are not repeated here for conciseness.
[0183] EXAMPLE IMPLEMENTATION OF DEVICES
[0184] FIG. 11 is a simplified block diagram of a device 1100 that is suitable for implementing embodiments of the present disclosure. The device 1100 can be considered as a further example implementation of the terminal device 110 or the network device 120 as shown in FIG. 1A. Accordingly, the device 1100 can be implemented at or as at least a part of the terminal device 110 or the network device 120.
[0185] As shown, the device 1100 includes a processor 1110, a memory 1120 coupled to the processor 1110, a suitable transceiver 1140 coupled to the processor 1110, and a communication interface coupled to the transceiver 1140. The memory 1110 stores at least a part of a program 1130. The transceiver 1140 may be for bidirectional communications or a unidirectional communication based on requirements. The transceiver 1140 may include at least one of a transmitter 1142 or a receiver 1144. The transmitter 1142 and the receiver 1144 may be functional modules or physical entities. The transceiver 1140 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones. The communication interface may represent any interface that is necessary for communication with other network elements, such as X2 / Xn interface for bidirectional communications between eNBs / gNBs, S1 / NG interface for communication between a Mobility Management Entity (MME) / Access and Mobility Management Function (AMF) / SGW / UPF and the eNB / gNB, Un interface for communication between the eNB / gNB and a relay node (RN) , or Uu interface for communication between the eNB / gNB and a terminal device.
[0186] The program 1130 is assumed to include program instructions that, when executed by the associated processor 1110, enable the device 1100 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to FIGs. 1 to 10. The embodiments herein may be implemented by computer software executable by the processor 1110 of the device 1100, or by hardware, or by a combination of software and hardware. The processor 1110 may be configured to implement various embodiments of the present disclosure. Furthermore, a combination of the processor 1110 and memory 1120 may form processing means 1150 adapted to implement various embodiments of the present disclosure.
[0187] The memory 1120 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 1120 is shown in the device 1100, there may be several physically distinct memory modules in the device 1100. The processor 1110 may be of any type suitable to the local technical network, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples. The device 1100 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.
[0188] In some embodiments, a terminal device comprises a circuitry configured to: determine multiple sets of delay information for a LCG or LCH, the delay information in one of the multiple sets comprising at least one of the following: a remaining time of a packet among packets buffered for the LCG or LCH or for a delay level, amount of delay-critical data or non-delay-critical data for the LCG or LCH or for the delay level, an importance level or an importance level group, or the delay level; and transmit, to a network device, a first DSR comprising the multiple sets of delay information.
[0189] In some embodiments, a network device comprises a circuitry configured to: receive, from a terminal device, a first DSR comprising multiple sets of delay information for a LCG or LCH, the delay information in one of the multiple sets comprising at least one of the following: a remaining time of a packet among packets buffered for the LCG or LCH or for a delay level, amount of delay-critical data or non-delay-critical data for the LCG or LCH or for the delay level, an importance level or an importance level group, or the delay level.
[0190] The term ‘circuitry’ used herein may refer to hardware circuits and / or combinations of hardware circuits and software. For example, the circuitry may be a combination of analog and / or digital hardware circuits with software / firmware. As a further example, the circuitry may be any portions of hardware processors with software including digital signal processor (s) , software, and memory (ies) that work together to cause an apparatus, such as a terminal device or a network device, to perform various functions. In a still further example, the circuitry may be hardware circuits and or processors, such as a microprocessor or a portion of a microprocessor, that requires software / firmware for operation, but the software may not be present when it is not needed for operation. As used herein, the term circuitry also covers an implementation of merely a hardware circuit or processor (s) or a portion of a hardware circuit or processor (s) and its (or their) accompanying software and / or firmware.
[0191] 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, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representation, it will be appreciated that the blocks, apparatus, systems, techniques or methods 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.
[0192] The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium. The computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the process or method as described above with reference to FIGs. 1 to 10. 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.
[0193] Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes 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 codes, 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.
[0194] The above program code may be embodied on a machine readable medium, which may be any tangible medium that may contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine readable medium may be a machine readable signal medium or a machine readable storage medium. A machine 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 machine 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.
[0195] Further, while 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, while 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. Certain features that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable sub-combination.
[0196] Although the present disclosure has been described in language 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 terminal device, comprising:a processor configured to cause the terminal device to:determine multiple sets of delay information for a logical channel group (LCG) or logical channel (LCH) , the delay information in one of the multiple sets comprising at least one of the following:a remaining time of a packet among packets buffered for the LCG or LCH or for a delay level,amount of delay-critical data or non-delay-critical data for the LCG or LCH or for the delay level,an importance level or an importance level group, orthe delay level; andtransmit, to a network device, a first delay status report (DSR) comprising the multiple sets of delay information.2.The terminal device of claim 1, wherein the terminal device is caused to transmit the first DSR by transmitting a medium access control (MAC) control element (CE) comprising at least one of the following:a field indicating a type of delay information for the LCG or LCH;a field indicating the importance level or the importance level group;a field indicating the delay level or an index of the delay level or an index of a delay level table; ora field indicating whether a set of delay information follows.3.The terminal device of claim 2, wherein the delay level table comprises a mapping between indexes and data of delay levels, and data of a lowest delay level in the delay levels comprises at least one of the following:data with low importance; ordata with remaining time larger than or equal to a threshold.4.The terminal device of claim 1, wherein the terminal device is further caused to:receive, from the network device, a configuration indicating multiple remaining time thresholds for multiple delay levels, wherein data of a lowest delay level in the multiple delay levels comprises at least one of the following:data with low importance; ordata with remaining time larger than or equal to a threshold.5.The terminal device of claim 1, wherein the terminal device is further caused to:in accordance with a determination that a second DSR is triggered or pending for the LCG or LCH, and the first DSR is triggered, cancel the second DSR.6.The terminal device of claim 1, wherein the terminal device is further caused to:in accordance with a determination that the first DSR is configured or activated, and there is a second DSR pending or triggered for the LCG or LCH, perform an operation comprising at least one of the following:cancelling the second DSR for the LCG or LCH; ortriggering the first DSR for the LCG or LCH.7.The terminal device of claim 1, wherein the terminal device is further caused to:determine that smallest remaining time of a packet among packets buffered for the LCG or LCH becomes lower than or equal to a remaining time threshold, and there is no first DSR or second DSR pending for the LCG or LCH; andin accordance with a determination that the first DSR is configured or activated, trigger the first DSR for the LCG or LCH.8.The terminal device of claim 1, wherein the terminal device is further caused to:determine that smallest remaining time of a packet among packets buffered for the LCG or LCH becomes lower than or equal to a remaining time threshold, and there is no first DSR pending for the LCG or LCH;in accordance with a determination that the first DSR is configured or activated, trigger the first DSR for the LCG or LCH; andin accordance with a determination that there is a second DSR pending for the LCG or LCH, cancel the second DSR.9.The terminal device of claim 1, wherein the terminal device is further caused to:cancel the first DSR based on at least one of the following:all delay-critical service data units (SDUs) associated with the first DSR have been discarded;a first medium access control (MAC) protocol data unit (PDU) is transmitted and the first MAC PDU comprises a first MAC control element (CE) that contains delay information of all the delay-critical SDUs associated with the first DSR;a second MAC PDU is transmitted and the second MAC PDU comprises all delay-critical service data units (SDUs) associated with the first DSR but is not sufficient to include a second MAC CE for the first DSR and a subheader of the second MAC CE; orthere is no delay-critical data buffered for the first DSR.10.The terminal device of claim 1, wherein the terminal device is further caused to:in accordance with a determination that a medium access control (MAC) protocol data unit (PDU) can accommodate all delay-critical service data units (SDUs) associated with all pending DSRs, include no MAC control element (CE) for the first DSR in the MAC PDU.11.The terminal device of claim 1, wherein the terminal device is further caused to:in accordance with a determination that a reset of a medium access control (MAC) entity is to be performed, cancel the first DSR triggered.12.The terminal device of claim 1, wherein the terminal device is caused to transmit the first DSR by:considering a scheduling request (SR) configuration of the LCH that triggered the first DSR as a SR configuration for a SR triggered by the first DSR.13.The terminal device of claim 1, wherein the terminal device is further caused to:stop an ongoing random access procedure due to a pending scheduling request (SR) for the first DSR based on at least one of the following:a medium access control (MAC) protocol data unit (PDU) is transmitted using a first uplink (UL) grant other than a UL grant provided by a random access response or a UL grant determined for transmission of a MsgA payload, and the MAC PDU comprises a MAC control element (CE) for the first DSR; orthe first UL grant can accommodate all service data units (SDUs) associated with the first DSR.14.The terminal device of claim 1, wherein the terminal device is further caused to:in accordance with a determination that a scheduling request (SR) is triggered by the first DSR and the first DSR has been cancelled, cancel the SR.15.The terminal device of claim 1, wherein the terminal device is further caused to:receive, from the network device, an indication indicating whether the first DSR is to be reported.16.The terminal device of claim 15, wherein the terminal device is further caused to at least one of the following:determine that the first DSR is initially deactivated upon configuration by upper layers; ordetermine that the first DSR is initially deactivated after reconfiguration with sync.17.The terminal device of claim 15, wherein the indication is a medium access control (MAC) control element (CE) , the MAC CE indicating an activation or deactivation status of the first DSR for the LCG or LCH or a data radio bearer (DRB) or a cell or a medium access control (MAC) entity or a cell group or the terminal device.18.The terminal device of claim 17, wherein the MAC CE comprises at least one of the following:a field indicating the activation or deactivation status of the first DSR for the LCG or LCH or DRB or cell or MAC entity or cell group or terminal device;a bitmap indicating the activation or deactivation status of the first DSR for a set of LCGs or LCHs or DRBs or cells or MAC entities or cell groups or terminal device; oran index of a LCG or LCH or DRB or cell or MAC entity or cell group or terminal device whose first DSR is activated or deactivated.19.A network device, comprising:a processor configured to cause the network device to:receive, from a terminal device, a first delay status report (DSR) comprising multiple sets of delay information for a logical channel group (LCG) or logical channel (LCH) , the delay information in one of the multiple sets comprising at least one of the following:a remaining time of a packet among packets buffered for the LCG or LCH or for a delay level,amount of delay-critical data or non-delay-critical data for the LCG or LCH or for the delay level,an importance level or an importance level group, orthe delay level.20.The network device of claim 19, wherein the network device is caused to receive the first DSR by receiving a medium access control (MAC) control element (CE) comprising at least one of the following:a field indicating a type of delay information for the LCG or LCH;a field indicating the importance level or the importance level group;a field indicating the delay level or an index of the delay level or an index of a delay level table; ora field indicating whether a set of delay information follows.21.The network device of claim 20, wherein the delay level table comprises a mapping between indexes and data of delay levels, and data of a lowest delay level in the delay levels comprises at least one of the following:data with low importance; ordata with remaining time larger than or equal to a threshold.22.The network device of claim 19, wherein the network device is further caused to:transmit, to the terminal device, a configuration indicating multiple remaining time thresholds for multiple delay levels, wherein data of a lowest delay level in the multiple delay levels comprises at least one of the following:data with low importance; ordata with remaining time larger than or equal to a threshold.23.The network device of claim 19, wherein the network device is further caused to:transmit, to the terminal device, an indication indicating whether the first DSR is to be reported.24.The network device of claim 23, wherein the indication is a medium access control (MAC) control element (CE) , the MAC CE indicating an activation or deactivation status of the first DSR for the LCG or LCH or a data radio bearer (DRB) or a cell or a medium access control (MAC) entity or a cell group or the terminal device.25.The network device of claim 24, wherein the MAC CE comprises at least one of the following:a field indicating the activation or deactivation status of the first DSR for the LCG or LCH or DRB or cell or MAC entity or cell group or terminal device;a bitmap indicating the activation or deactivation status of the first DSR for a set of LCGs or LCHs or DRBs or cells or MAC entities or cell groups or terminal device; oran index of an LCG or LCH or DRB or cell or MAC entity or cell group or terminal device whose first DSR is activated or deactivated.26.A method of communication, comprising:determining, at a terminal device, multiple sets of delay information for a logical channel group (LCG) or logical channel (LCH) , the delay information in one of the multiple sets comprising at least one of the following:a remaining time of a packet among packets buffered for the LCG or LCH or for a delay level,amount of delay-critical data or non-delay-critical data for the LCG or LCH or for the delay level,an importance level or an importance level group, orthe delay level; andtransmitting, to a network device, a first delay status report (DSR) comprising the multiple sets of delay information.27.A method of communication, comprising:receiving, at a network device and from a terminal device, a first delay status report (DSR) comprising multiple sets of delay information for a logical channel group (LCG) or logical channel (LCH) , the delay information in one of the multiple sets comprising at least one of the following:a remaining time of a packet among packets buffered for the LCG or LCH or for a delay level,amount of delay-critical data or non-delay-critical data for the LCG or LCH or for the delay level,an importance level or an importance level group, orthe delay level.
Citation Information
Patent Citations
Channel state information reporting for point-to-multipoint operation
CN116746082A
Delay state reporting method, terminal, network device, communication system and storage medium
CN117546574A
Method and apparatus for transmitting scheduling request in mobile communication system
US20210100010A1