CN113647135A - Dynamic threshold for dual connectivity in unlicensed spectrum - Google Patents
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Abstract
Exemplary embodiments of the present invention relate to devices, methods, apparatuses and computer-readable storage media for adjusting a split threshold for dual connectivity in unlicensed spectrum. In an example embodiment, a terminal device in dual connectivity with two cell groups detects a number of listen-before-talk failures for uplink transmissions in one of the two cell groups over the unlicensed spectrum. In response to detecting the number of listen before talk failures, the terminal device adjusts a split threshold for splitting uplink data between the two cell groups.
Description
Technical Field
Exemplary embodiments of the invention relate generally to the field of communications and, more particularly, relate to an apparatus, method, apparatus, and computer-readable storage medium for adjusting a split threshold for dual connectivity in unlicensed spectrum.
Background
Listen Before Talk (LBT) restricts communication over unlicensed spectrum. Transmissions over the unlicensed spectrum are only possible when the channel is sensed to be idle. In an LBT procedure, a device may apply a Clear Channel Assessment (CCA) check before using a channel. The CCA utilizes at least energy detection to determine whether other signals are present on the channel in order to determine whether the channel is occupied or clear. In certain countries and regions LBT is mandatory for unlicensed spectrum. In addition to regulatory requirements, carrier sensing by LBT is one way to fairly share unlicensed spectrum. Thus, it is considered an important feature of fair and friendly operation in unlicensed spectrum in a single global solution framework.
For unlicensed New Radios (NR) in the third generation partnership project (3GPP), the agreed goal includes Dual Connectivity (DC) operation. In DC, a terminal device, such as a User Equipment (UE), maintains two connections with two network devices, or two groups of cells, such as an eNB or a gNB. DC was introduced in 3GPP release 12 (Rel-12) and enhanced in release 13 (Rel-13) to support bearer splitting operations in the uplink. When a bearer is split in the uplink, the split threshold may be configured to control how a Packet Data Convergence Protocol (PDCP) entity feeds data to lower layers for transmission.
In a bearer split operation, if the uplink data to be sent is less than the split threshold, the data will be sent by the terminal device on the primary path of both cell groups. If the data exceeds the threshold, the data will be split between the primary and secondary paths in both cell groups. However, this threshold-based mechanism is too rigid.
Disclosure of Invention
In general, exemplary embodiments of the invention provide an apparatus, method, apparatus and computer-readable storage medium for adjusting a split threshold for dual connectivity in unlicensed spectrum.
In a first aspect, an apparatus in dual connectivity with two cell groups is provided. The apparatus includes at least one processor and at least one memory including computer program code. The at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus to detect a number of pre-talk listening failures for uplink transmissions in one of two cell groups over an unlicensed spectrum. The device also adjusts a split threshold for splitting uplink data between the two cell groups in response to detecting the number of listen-before-talk failures.
In a second aspect, a method is provided. In the method, a terminal device in dual connectivity with two cell groups detects a number of listen-before-talk failures for uplink transmissions in one of the two cell groups over an unlicensed spectrum. In response to detecting the number of listen before talk failures, the terminal device adjusts a split threshold for splitting uplink data between the two cell groups.
In a third aspect, an apparatus is provided comprising means for performing the method steps according to the second aspect.
In a fourth aspect, a computer-readable storage medium is provided that includes program instructions stored thereon. The instructions, when executed by a processor of the apparatus, cause the apparatus to perform the method according to the second aspect.
It should be understood that the summary is not intended to identify key or essential features of the exemplary embodiments of the invention, nor is it intended to be used to limit the scope of the invention. Other features of the present invention will become readily apparent from the following description.
Drawings
Some example embodiments will now be described with reference to the accompanying drawings, in which:
fig. 1 illustrates an example scenario in which some example embodiments of the present disclosure may be implemented;
fig. 2 illustrates a flow chart of an exemplary method according to some exemplary embodiments of the present disclosure; and
fig. 3 shows a simplified block diagram of a device suitable for implementing an exemplary embodiment of the present invention.
Throughout the drawings, the same or similar reference numbers refer to the same or similar elements.
Detailed Description
The principles of the present invention will now be described with reference to a few exemplary embodiments. It is to be understood that the description of these exemplary embodiments is for purposes of illustration only and to aid those skilled in the art in understanding and practicing the present invention, and is not intended to suggest any limitation as to the scope of the invention. The disclosure described herein may be implemented in a variety of ways other than those described below.
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 skill in the art to which this invention belongs.
As used herein, the term "terminal device" or "user equipment" (UE) refers to any terminal device capable of wireless communication with each other or a base station. Communication may involve the transmission and/or reception of wireless signals using electromagnetic signals, radio waves, infrared signals, and/or other types of signals suitable for the transmission of information over the air. In some example embodiments, the UE may be configured to transmit and/or receive information without direct human interaction. For example, the UE may send information to the network device according to a predetermined schedule, when triggered by an internal or external event, or in response to a request from the network side.
Examples of UEs include, but are not limited to, User Equipment (UE), personal wearable devices such as smart phones, wireless-enabled tablets, notebook embedded devices (LEEs), notebook installed devices (LMEs), wireless Customer Premises Equipment (CPE), sensors, metering devices, watches, and the like. And/or a vehicle capable of communication. For purposes of discussion, some example embodiments will be described with reference to a UE as an example of a terminal device, and the terms "terminal device" and "user equipment" (UE) may be used interchangeably within the context of this disclosure.
As used herein, the term "network device" refers to a device through which services may be provided to terminal devices in a communication network. Examples of network devices may include relays, Access Points (APs), transmission points (TRPs), node bs (NodeB or NB), evolved node bs (eNodeB or eNB), New Radio (NR) node bs (gnb), remote radio modules (RRUs), Radio Heads (RH), Remote Radio Heads (RRHs), low power nodes, such as pico cells, etc.
As used herein, the term "circuitry" may refer to one or more or all of:
(a) hardware-only circuit implementations (e.g., implementations in only analog and/or digital circuitry), an
(b) A combination of hardware circuitry and software, for example (as applicable): (i) a combination of analog and/or digital hardware circuitry and software/firmware, and (ii) any portion of a hardware processor and software (including a digital signal processor), software, and memory that operate together to cause a device, such as a mobile phone or server, to perform various functions, and
(c) hardware circuitry and/or a processor, such as a microprocessor or a portion of a microprocessor, requires software (e.g., firmware) for operation, but software may not be present when operation is not required.
The definition of circuitry applies to all uses of the term in this application, including any claims. As a further example, as used in this application, the term circuitry also includes an implementation of merely a hardware circuit or processor (or multiple processors) or a portion of a hardware circuit or processor and its (or its) accompanying software and/or firmware. The term circuitry also includes, 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 a server, a cellular network device, or other computing or network device.
As used herein, the singular forms "a", "an" and "the" include the plural forms as well, unless the context clearly indicates otherwise. The term "include" and its variants are to be understood as open-ended terms of "including, but not limited to". The term "based on" should be understood as "based at least in part on". The terms "one embodiment" and "one embodiment" should be understood as "at least one embodiment". The term "another embodiment" should be understood as "at least one other embodiment". Other definitions, both explicit and implicit, may be included below.
As used herein, the terms "first," "second," and the like may be used to describe various elements, which should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be termed a second element, and, similarly, a second element may 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.
For bearer splitting operations, a split threshold is configured in 3GPP TS 36.323 for controlling how PDCP data is fed to lower layers for transmission, as follows.
The simplified threshold mechanism for NR in 3GPP TS 38.323 is as follows.
According to this threshold-based mechanism, if the uplink data to be transmitted by the terminal device exceeds a configured threshold, the data will be split between the primary and secondary paths in two cell groups served by two different network devices in dual connectivity with the terminal device. One of the two cells may be referred to as a Master Cell Group (MCG) and the other may be referred to as a Secondary Cell Group (SCG). Thus, data received by both network devices may be reordered to determine the original data sent by the terminal device.
However, such conventional threshold-based mechanisms are too rigid and inflexible. Considering the different scenarios in which MCG or SCG may use licensed or unlicensed spectrum, this mechanism will lead to the following problems shown in table 1:
TABLE 1
It can be seen that in any case, too strict a threshold may introduce undesirable delays for data transmission or reduce overall throughput. The split threshold and/or the primary path may be reconfigured by the network device via Radio Resource Control (RRC) signaling. However, this reconfiguration is considered too slow.
The exemplary embodiments of this invention provide a dynamic threshold mechanism for uplink bearer splitting operations over unlicensed spectrum. This dynamic mechanism may reflect LBT failure in unlicensed spectrum. When a terminal device is in dual connectivity with two cell groups, the terminal device will adjust a split threshold for splitting uplink data between the two cell groups if the terminal device detects a number of LBT failures for UL transmissions in one cell group over the unlicensed spectrum. In this way, the portion of uplink data to be routed to the cell group in which the LBT failure was detected may be reduced.
For example, if one master cell group of two cell groups is operating in the unlicensed spectrum, an LBT failure in the master cell group will trigger a decrease in the split threshold. Conversely, when one of the two cell groups operates in the unlicensed spectrum, an LBT failure in that cell group will trigger an increase in the split threshold. Thus, the split threshold may be dynamically adjusted based on the availability of channels or carriers in the unlicensed spectrum.
FIG. 1 illustrates an example environment 100 in which example embodiments of the present disclosure may be implemented. The environment 100, which may be part of a communication network, includes a terminal device 105 in dual connectivity with two network devices 110 and 115. It should be understood that one terminal device and two network devices are shown in environment 100 for illustrative purposes only and are not meant to suggest any limitation as to the scope of the disclosure. Any suitable number of network devices and terminal devices may be included in environment 100.
One of the network devices 110 and 115 may be a primary network device and the other may be a secondary network device. Thus, the primary network device provides a group of cells that is the MCG and the secondary network device provides a group of cells that is the SCG. MCG or SCG may be dominant. Further, either of cell groups 120 or 125 may be an MCG.
According to an exemplary embodiment of the invention, the terminal device 105 dynamically adjusts the split threshold for splitting UL data between the two cell groups 120 and 125 based on the detected LBT failure in the unlicensed spectrum.
Fig. 2 illustrates a flow chart of an example method 200 according to some example embodiments of the present disclosure. As shown in fig. 1, method 200 may be implemented by terminal device 105. For discussion purposes, the method 200 will be described with reference to fig. 1.
At block 205, the terminal device 105 detects a number of LBT failures for UL transmissions in the cell group 120 or 125 over the unlicensed spectrum. In some example embodiments, LBT failures may be detected over a period of time. The time period may be configured on the network side or specified or defined in the 3GPP specifications. LBT failures may or may not be consecutive. For example, the terminal device 105 may detect a continuous LBT failure of a UL transmission in a cell group 120 or 125 within a time period.
In some example embodiments, LBT failures may be detected for all UL transmissions in one of cell groups 120 and 125. In some other example embodiments, detection of LBT failure may be directed to a subset or portion of UL transmissions in one of the cell groups 120 and 125 over the unlicensed spectrum. For example, the terminal device 105 may detect an LBT failure in a set of carriers or channels associated with the split threshold to be adjusted. The carrier to be detected may be a carrier to which a Logical Channel (LCH) corresponding to a Data Radio Bearer (DRB) having a split threshold to be adjusted is mapped.
After detecting the number of LBT failures, the terminal device 105 adjusts the split threshold for splitting UL data between the two cell groups 120 and 125 at block 210. For example, a portion of uplink data to be routed to one of the cell groups 120 and 125 in which an LBT failure is detected may be reduced, thereby reducing latency and improving throughput.
In some example embodiments, the split threshold may be used to control the amount of data in the two cell groups that is split from the primary path or the default path to the secondary path. In this example, the adjustment may be related to which cell group is dominant. For example, if the cell group in which the LBT failure is detected is dominant, the split threshold may be decreased. Thus, more UL data can be split into the primary cell group, thereby reducing the impact of LBT failure on data transmission, such as an increase in delay and a decrease in throughput. If the cell group is secondary, the split threshold may be increased to allow more UL data to be routed to another cell group.
Table 2 shows examples of adjustment of the split threshold in the following four exemplary scenarios.
TABLE 2
As shown in table 2, if ul-DataSplitDRB-viasccg is true, which means that SCG is primary, and SCG is operating in unlicensed spectrum, LBT failure in SCG will trigger the split threshold to be automatically decreased. If ul-DataSplitDRB-ViaSCG is false, which means that SCG is non-primary, MCG is primary, and SCG is operating on unlicensed spectrum, an LBT failure in SCG will trigger the threshold to be automatically increased. If ul-DataSplitDRB-ViaSCG is true and the MCG is operating on an unlicensed spectrum, an LBT failure in the MCG will trigger the threshold to be automatically increased. If ul-DataSplitDRB-ViaSCG is false and the MCG is operating on an unlicensed spectrum, an LBT failure in the MCG will trigger the threshold to be automatically decreased.
If both cell sets 120 and 125 are operating in unlicensed spectrum, an increased LBT failure on the primary (or default) path in the master cell set of cell sets 120 and 125 will trigger a decrease in the threshold. Increased LBT failures on the secondary paths in the secondary cell groups of cell groups 120 and 125 will trigger an increase in the threshold.
In some exemplary embodiments, the split threshold may be adjusted based on at least one step size. For example, the step size may depend on a specified value in RRC signaling from network device 110 or 115. The splitting threshold values defined in 3GPP TS 38.331 are as follows:
ul-DataSplitThreshold
this parameter is specified in TS 38.323. The value b0 corresponds to 0 bytes, the value b100 corresponds to 100 bytes, the value b200 corresponds to 200 bytes, and so on. The network sets this parameter (or field) to "infinity" for UEs that do not support split DRBs with UL MCG SCG. If this field does not exist the first time the split bearer is configured for the radio bearer, then the default value is applied to infinity.
The step size used in the split threshold adjustment may be selected from a specified list of values as shown above. For example, if the split threshold is to be increased, the available higher values next to the current value may be selected. If the threshold is to be decreased, the next available lower value may be selected. Furthermore, the split threshold may be adjusted (increased or decreased) in the available steps.
As another example, network device 110 or 115 or another network entity or function may configure some other step size to adjust. These steps can be configured in bits or bytes. In some example embodiments, the configured step size may include increasing the step size to increase the threshold and decreasing the step size to decrease the threshold. The increase and decrease steps may be different.
In some example embodiments, the adjustment of the split threshold may be limited to within a predefined range. For example, limits for increasing and decreasing the split threshold may be configured, which will be referred to as upper and lower limits, respectively. The upper and lower limits may be expressed in bits or bytes. Alternatively, the upper and lower limits may depend on specified maximum and minimum values of the split threshold in RRC signaling specified or defined in the 3GPP specifications (e.g., 3GPP TS 38.331).
If the upper limit is reached, the split threshold may be prohibited from being adjusted to any higher value. In this case, some data may still be transmitted via the secondary path in the secondary cell group. Alternatively, the terminal device 105 may be forced to send UL data in the master cell group of cell groups 120 and 125 to force the UL data to be routed only to the primary (or default) path in the master cell group. This may be beneficial in NR where the PDCP entity allows pre-processing of data of the Radio Link Control (RLC) entity. If the secondary cell group experiences consecutive LBT failures, it is preferable to provide less data to the cell group because the PDCP Protocol Data Units (PDUs) in the cell group may have a receive window pause for a long time at the receiving side.
If the lower limit is reached, the split threshold may be prohibited from being adjusted to any lower value. Depending on the comparison of the amount of data to the threshold, data may be sent via one or both of the primary and secondary paths in cell groups 120 and 125. In some example embodiments, in this case, the terminal device 105 may autonomously trigger a handover of the primary cell group and the secondary cell group of the two cell groups 120 and 125. After switching, the split threshold may remain within the limit value or may be reset to a predefined value, e.g. the original value, before performing the adjustment.
In some example embodiments, if LBT failure no longer occurs, the adjustment of the split threshold may be stopped. In this case, the split threshold may be reset to a predefined value or the original value. For example, if one or more LBTs are detected as successful in the cell group in which the LBT failure occurred, the terminal device 105 may reset the split threshold to a predefined value.
In some example embodiments, the detection that there are no more LBT failures may be based on a counter. For example, the terminal device 105 may trigger or enable a counter if a number of consecutive LBT failures is detected in one of the cell groups 120 and 125. The counter may be stopped or disabled once LBT success is detected in the cell group. The terminal device 105 may determine that an LBT failure no longer occurs in the group of cells.
In some example embodiments, after adjusting the threshold, the terminal device 105 may send a Buffer Status Report (BSR) based on the adjusted split threshold. For example, upon arrival of data to be transmitted, terminal device 105 may determine that one or both of cell groups 120 and 125 will be used to transmit data based on a comparison of the amount of data and an adjustment threshold. The terminal device 105 may then send a BSR in the respective one or two cell groups. The terminal device 105 may periodically send a BSR in at least one cell group. Thus, the Network (NW) may be aware of the current LBT problem. Thus, the likelihood of the NW triggering any required reconfiguration can be enhanced.
Fig. 3 is a simplified block diagram of an apparatus 300 suitable for practicing the exemplary embodiments of this disclosure. Device 300 may be implemented at or as part of terminal device 105 as shown in fig. 1.
As shown, the device 300 includes a processor 310, a memory 320 coupled to the processor 310, a communication module 330 coupled to the processor 310, and a communication interface (not shown) coupled to the communication module 330. The memory 320 stores at least one program 340. The communication module 330 is used for bidirectional communication, for example, via a plurality of antennas. The communication interface may represent any interface required for communication.
The memory 320 may be of any type suitable for a local technology network and may be implemented using any suitable data storage technology, such as non-transitory computer-readable storage media, semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. Although only one memory 320 is shown in device 300, there may be multiple physically distinct memory modules in device 300. The processor 310 may be of any type suitable to the local technology network, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (dsps) and processors based on a multi-core processor architecture, as non-limiting examples. The device 300 may have multiple processors, such as application specific integrated circuit chips, that are time dependent from a clock synchronized with the host processor.
When device 300 is acting as a terminal device 105 or part of a terminal device 105, processor 310 and communication module 330 may cooperate to implement method 200 as described above with reference to fig. 2.
All of the operations and features described above with reference to fig. 1 and 2 are equally applicable to the device 300 and have similar effects. Details will be omitted for simplicity.
In general, the various exemplary embodiments of this invention 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 the exemplary embodiments of this disclosure are illustrated and described as block diagrams, flow charts, or using some other pictorial representation, it is well understood that the block diagrams, 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 combinations thereof.
The present invention also provides at least one computer program product tangibly stored on a non-transitory computer-readable storage medium. The computer program product comprises computer executable instructions, such as instructions comprised in program modules, executed in a device on a target real or virtual processor to perform the method 200 as described above with reference to fig. 2. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, etc. that perform particular tasks or implement particular abstract data types. In various exemplary embodiments, the functionality of the program modules may be combined or split between program modules as desired. Machine-executable instructions for program modules may be executed within local or distributed devices. In a distributed facility, program modules may be located in both local and remote memory storage media.
Program code for carrying out methods of the present invention 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 flowchart and/or block diagram to be performed. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine, partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, computer program code or associated data may be carried by any suitable carrier for enabling a device, apparatus or processor to perform the various processes and operations described above. Examples of carrier waves include signals, computer readable media, and the like.
The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable medium may include, but is 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 a computer-readable storage medium 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), a Digital Versatile Disc (DVD), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
Further, while operations are described 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 some cases, multitasking and parallel processing may be advantageous. Similarly, while several specific implementation details are included in the above discussion, these should not be construed as limitations on the scope of the disclosure, but rather as descriptions of features that may be specific to particular example embodiments. Certain features that are described in the context of separate example embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiment separately or in any suitable subcombination.
Although the invention has been described in language specific to structural features and/or methodological acts, it is to be understood that the invention 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.
Various example embodiments of these techniques have been described. In addition to, or instead of, the foregoing, the following examples are described. Features described in any of the examples below may be used with any of the other examples described herein.
In some aspects, an apparatus comprises: at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause an apparatus in dual connectivity with two cells to: detecting a number of pre-call listening failures for uplink transmissions in one of two cell groups over an unlicensed spectrum; and adjusting a split threshold for splitting uplink data between the two cell groups in response to detecting the number of listen-before-talk failures.
In some exemplary embodiments, the apparatus is caused to adjust the split threshold by: determining whether one of the two cell groups is dominant; and in response to determining that one of the two cell groups is dominant, reducing the split threshold to reduce a portion of uplink data to be routed to the one of the two cell groups.
In some example embodiments, the apparatus is further caused to adjust the split threshold by: in response to determining that one of the two cell groups is non-primary, the split threshold is increased to reduce a portion of uplink data to be routed to the one of the two cell groups.
In some example embodiments, the apparatus is caused to adjust the split threshold by: the split threshold is adjusted based on the at least one step size.
In some example embodiments, the at least one step includes an increase step and a decrease step different from the increase step.
In some example embodiments, the at least one step comprises a predefined set of steps, and the apparatus is caused to adjust the split threshold by: selecting an available step size from a predefined set of step sizes; and adjusting the split threshold by the available step size.
In some example embodiments, the apparatus is caused to adjust the split threshold by: the split threshold is adjusted within a predefined range.
In some exemplary embodiments, the predefined range includes an upper limit, and the apparatus is further caused to: in response to the split threshold reaching an upper limit, uplink data is sent only in the master cell group of the two cell groups.
In some exemplary embodiments, the predefined range includes a lower limit, and the apparatus is further caused to: and triggering the switching of the main cell group and the auxiliary cell group of the two cell groups in response to the split threshold value reaching the lower limit.
In some exemplary embodiments, the apparatus is further caused to: the split threshold is reset to a predefined value after the handover.
In some exemplary embodiments, the device is caused to detect the number of listen before talk failures by: the number of listen before talk failures is detected for uplink transmissions within a time period.
In some example embodiments, the uplink transmission comprises an uplink transmission over an unlicensed spectrum on a set of carriers associated with the split threshold, the device caused to detect the number of pre-talk listening failures by: detecting the number of listen before talk failures for uplink transmissions on the set of carriers.
In some exemplary embodiments, the apparatus is further caused to: in response to detecting at least one listen before talk success for uplink transmissions in one of the two cell groups over the unlicensed spectrum, resetting the split threshold to a predefined value.
In some exemplary embodiments, the apparatus is further caused to: a buffer status report is sent in at least one of the two cell groups based on the adjusted split threshold.
In some aspects, a method comprises: detecting, by a terminal device in dual connectivity with two cell groups, a number of listen-before-talk failures for uplink transmissions in one of the two cell groups over an unlicensed spectrum; and adjusting a split threshold for splitting uplink data between the two cell groups in response to detecting the number of listen-before-talk failures.
In some exemplary embodiments, adjusting the split threshold comprises: determining whether one of the two cell groups is dominant; and in response to determining that one of the two cell groups is dominant, reducing the split threshold to reduce a portion of uplink data to be routed to the one of the two cell groups.
In some exemplary embodiments, adjusting the split threshold further comprises: in response to determining that one of the two cell groups is non-primary, the split threshold is increased to reduce a portion of uplink data to be routed to the one of the two cell groups.
In some example embodiments, adjusting the split threshold comprises: the split threshold is adjusted based on the at least one step size.
In some example embodiments, the at least one step includes an increase step and a decrease step different from the increase step.
In some example embodiments, the at least one step comprises a predefined set of steps, and adjusting the split threshold comprises: selecting an available step size from a predefined set of step sizes; and adjusting the split threshold by the available step size.
In some example embodiments, adjusting the split threshold comprises: the split threshold is adjusted within a predefined range.
In some example embodiments, the predefined range includes an upper limit, and the method further comprises: in response to the split threshold reaching an upper limit, uplink data is sent only in the master cell group of the two cell groups.
In some example embodiments, the predefined range includes a lower limit, and the method further comprises: and triggering the switching of the main cell group and the auxiliary cell group of the two cell groups in response to the split threshold value reaching the lower limit.
In some example embodiments, the method further comprises: the split threshold is reset to a predefined value after the handover.
In some example embodiments, detecting the number of listen before talk failures comprises: the number of listen before talk failures is detected for uplink transmissions within a time period.
In some example embodiments, the uplink transmission comprises an uplink transmission over an unlicensed spectrum on a set of carriers associated with the split threshold, and detecting the number of listen-before-talk failures comprises: detecting the number of listen before talk failures for uplink transmissions on the set of carriers.
In some exemplary embodiments, the method further comprises: in response to detecting at least one listen before talk success for uplink transmissions in one of the two cell groups over the unlicensed spectrum, resetting the split threshold to a predefined value.
In some exemplary embodiments, the method further comprises: a buffer status report is sent in at least one of the two cell groups based on the adjusted split threshold.
In some aspects, an apparatus comprises: means for detecting, by a terminal device in dual connectivity with two cell groups, a number of listen-before-talk failures for uplink transmissions in one of the two cell groups over an unlicensed spectrum; and means for adjusting a split threshold for splitting uplink data between the two cell groups in response to detecting the number of listen-before-talk failures.
In some example embodiments, the means for adjusting the split threshold comprises: means for determining whether one of the two cell groups is dominant; and means for reducing the split threshold to reduce a portion of uplink data to be routed to one of the two cell groups in response to determining that the one of the two cell groups is dominant.
In some exemplary embodiments, the means for adjusting the split threshold further comprises: means for increasing a split threshold to reduce a portion of uplink data to be routed to one of the two cell groups in response to determining that the one of the two cell groups is non-primary.
In some example embodiments, the means for adjusting the split threshold comprises: means for adjusting the split threshold based on the at least one step size.
In some example embodiments, the at least one step includes an increase step and a decrease step different from the increase step.
In some example embodiments, the at least one step comprises a predefined set of steps, and the means for adjusting the split threshold comprises: means for selecting an available step size from a predefined set of step sizes; and means for adjusting the split threshold by the available step size.
In some example embodiments, the means for adjusting the split threshold comprises: means for adjusting the split threshold within a predefined range.
In some example embodiments, the predefined range includes an upper limit, and the apparatus further comprises: means for transmitting uplink data only in a master cell group of the two cell groups in response to the split threshold reaching the upper limit.
In some example embodiments, the predefined range includes a lower limit, and the apparatus further comprises: means for triggering a handover of a master cell group and a secondary cell group of the two cell groups in response to the split threshold reaching a lower bound.
In some example embodiments, the apparatus further comprises: means for resetting the split threshold to a predefined value after the switching.
In some example embodiments, the means for detecting the number of listen before talk failures comprises: means for detecting the number of listen-before-talk failures for uplink transmissions within a time period.
In some example embodiments, the uplink transmission comprises an uplink transmission over an unlicensed spectrum on a set of carriers associated with the split threshold, and the means for detecting the number of listen-before-talk failures comprises: means for detecting the number of listen failures before the number of calls for the uplink transmission on the set of carriers.
In some exemplary embodiments, the apparatus further comprises: means for resetting the split threshold to a predefined value in response to detecting at least one listen before talk success for uplink transmissions in one of the two cell groups over the unlicensed spectrum.
In some example embodiments, the apparatus further comprises: means for sending a buffer status report in at least one of the two cell groups based on the adjusted split threshold.
In some aspects, a computer-readable storage medium includes program instructions stored thereon that, when executed by a processor of a device, cause the device to perform a method according to some example embodiments of the present disclosure.
Claims (30)
1. An apparatus, comprising:
at least one processor; and
at least one memory including computer program code;
the at least one memory and the computer program code configured to, with the at least one processor, cause an apparatus in dual connectivity with two cell groups to:
detecting a number of pre-call listening failures for uplink transmissions in one of two cell groups over an unlicensed spectrum; and
in response to detecting the number of listen before talk failures, a split threshold for splitting uplink data between two cell groups is adjusted.
2. The apparatus of claim 1, wherein the apparatus is caused to adjust the split threshold by:
determining whether the one of the two cell groups is primary; and
in response to determining that the one of the two cell groups is dominant, decreasing the split threshold to decrease a portion of the uplink data to be routed to the one of the two cell groups.
3. The apparatus of claim 2, wherein the apparatus is further caused to adjust the split threshold by:
in response to determining that the one of the two cell groups is non-primary, increasing the split threshold to reduce a portion of the uplink data to be routed to the one of the two cell groups.
4. The apparatus of claim 1, wherein the apparatus is caused to adjust the split threshold by:
adjusting the split threshold based on at least one step size.
5. The apparatus of claim 4, wherein the at least one step size comprises an increase step size and a decrease step size different from the increase step size.
6. The apparatus of claim 4, wherein the at least one step comprises a predefined set of steps, and the apparatus is caused to adjust the split threshold by:
selecting an available step size from the predefined set of step sizes; and
adjusting the split threshold by the available step size.
7. The apparatus of claim 1, wherein the apparatus is caused to adjust the split threshold by:
adjusting the split threshold within a predefined range.
8. An apparatus of claim 7, wherein the predetermined range includes an upper limit, and the apparatus is further caused to:
transmitting the uplink data only in a master cell group of the two cell groups in response to the split threshold reaching the upper limit.
9. An apparatus of claim 7, wherein the predetermined range includes a lower limit, and the apparatus is further caused to:
triggering a handover of a master cell group and a secondary cell group of the two cell groups in response to the split threshold reaching the lower bound.
10. An apparatus of claim 9, wherein the apparatus is further caused to:
resetting the split threshold to a predefined value after the switching.
11. The apparatus of claim 1, wherein the apparatus is caused to detect the number of pre-call listening failures by:
detecting the number of pre-call listening failures for the uplink transmission over a period of time.
12. The apparatus of claim 1, wherein the uplink transmission comprises an uplink transmission over the unlicensed spectrum on a set of carriers associated with the split threshold, and the apparatus is caused to detect the number of pre-talk listening failures by:
detecting the number of pre-call listening failures for the uplink transmission on the set of carriers.
13. An apparatus of claim 1, wherein the apparatus is further caused to:
resetting the split threshold to a predefined value in response to detecting at least one listen before talk success for the uplink transmission in the one of the two cell groups over the unlicensed spectrum.
14. An apparatus of claim 1, wherein the apparatus is further caused to:
sending a buffer status report in at least one of the two cell groups according to the adjusted split threshold.
15. A method, comprising:
detecting, by a terminal device in dual connectivity with two cell groups, a number of listen-before-talk failures for uplink transmissions in one of the two cell groups over an unlicensed spectrum; and
adjusting a split threshold for splitting the uplink data between the two cell groups in response to detecting the number of listen-before-talk failures.
16. The method of claim 15, wherein adjusting the split threshold comprises:
determining whether the one of the two cell groups is primary; and
in response to determining that the one of the two cell groups is dominant, decreasing the split threshold to decrease a portion of the uplink data to be routed to the one of the two cell groups.
17. The method of claim 16, wherein adjusting the split threshold further comprises:
in response to determining that the one of the two cell groups is non-primary, increasing the split threshold to reduce a portion of the uplink data to be routed to the one of the two cell groups.
18. The method of claim 15, wherein adjusting the split threshold comprises:
adjusting the split threshold based on at least one step size.
19. The method of claim 18, wherein the at least one step size comprises an increase step size and a decrease step size different from the increase step size.
20. The method of claim 18, wherein the at least one step size comprises a predefined set of step sizes, and adjusting the split threshold comprises:
selecting an available step size from the predefined set of step sizes; and
adjusting the split threshold by the available step size.
21. The method of claim 15, wherein adjusting the split threshold comprises:
adjusting the split threshold within a predefined range.
22. The method of claim 21, wherein the predefined range includes an upper limit, and the method further comprises:
transmitting the uplink data only in a master cell group of the two cell groups in response to the split threshold reaching the upper limit.
23. The method of claim 21, wherein the predefined range includes a lower limit, and the method further comprises:
triggering a handover of a master cell group and a secondary cell group of the two cell groups in response to the split threshold reaching the lower bound.
24. The method of claim 23, further comprising:
resetting the split threshold to a predefined value after handover.
25. The method of claim 15, wherein detecting the number of pre-call listening failures comprises:
detecting the number of pre-call listening failures for the uplink transmission over a period of time.
26. The method of claim 15, wherein the uplink transmission comprises an uplink transmission over the unlicensed spectrum on a set of carriers associated with the split threshold, and detecting the number of pre-talk listening failures comprises:
detecting the number of pre-call listening failures for the uplink transmission on the set of carriers.
27. The method of claim 15, further comprising:
resetting the split threshold to a predefined value in response to detecting at least one listen before talk success for the uplink transmission in the one of the two cell groups over the unlicensed spectrum.
28. The method of claim 15, further comprising:
sending a buffer status report in at least one of the two cell groups based on the adjusted split threshold.
29. An apparatus, comprising:
means for detecting, by a terminal device in dual connectivity with two cell groups, a number of listen-before-talk failures for uplink transmissions in one of the two cell groups over an unlicensed spectrum; and
means for adjusting a split threshold for splitting the uplink data between the two cell groups in response to detecting the number of listen-before-talk failures.
30. A computer readable storage medium comprising program instructions stored thereon that, when executed by a processor of a device, cause the device to perform the method of any of claims 15-28.
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| PCT/CN2019/080252 WO2020191772A1 (en) | 2019-03-28 | 2019-03-28 | Dynamic threshold for dual-connectivity in unlicensed spectrum |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105376801A (en) * | 2014-08-25 | 2016-03-02 | 中兴通讯股份有限公司 | uplink data transmission method and terminal |
| CN107079346A (en) * | 2014-10-23 | 2017-08-18 | 英特尔Ip公司 | System, method and apparatus for carrying out carrying fractionation in multi radio equipment heterogeneous network |
| US20180279173A1 (en) * | 2017-03-24 | 2018-09-27 | Motorola Mobility Llc | Split bearer packet data converge protocol protocol data unit routing |
| US20180317115A1 (en) * | 2017-04-26 | 2018-11-01 | Motorola Mobility Llc | Packet data converge protocol protocol data unit pre-processing |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106488499A (en) * | 2015-08-25 | 2017-03-08 | 中兴通讯股份有限公司 | A kind of service shunting method and device |
| CN109462872B (en) * | 2018-11-23 | 2022-04-08 | 武汉虹信科技发展有限责任公司 | Data distribution method, device and communication system |
-
2019
- 2019-03-28 CN CN201980094955.9A patent/CN113647135A/en active Pending
- 2019-03-28 WO PCT/CN2019/080252 patent/WO2020191772A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105376801A (en) * | 2014-08-25 | 2016-03-02 | 中兴通讯股份有限公司 | uplink data transmission method and terminal |
| CN107079346A (en) * | 2014-10-23 | 2017-08-18 | 英特尔Ip公司 | System, method and apparatus for carrying out carrying fractionation in multi radio equipment heterogeneous network |
| US20180279173A1 (en) * | 2017-03-24 | 2018-09-27 | Motorola Mobility Llc | Split bearer packet data converge protocol protocol data unit routing |
| US20180317115A1 (en) * | 2017-04-26 | 2018-11-01 | Motorola Mobility Llc | Packet data converge protocol protocol data unit pre-processing |
Non-Patent Citations (1)
| Title |
|---|
| APPLE INC.: "R2-1812713 "QoS Flow based Data Split between Licensed and Unlicensed Spectrum"", 3GPP TSG_RAN\\WG2_RL2, no. 2, 10 August 2018 (2018-08-10) * |
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