WO2021188852A1 - Division de données de liaison montante à faible consommation d'énergie basée sur un équipement utilisateur (ue) en double connectivité - Google Patents

Division de données de liaison montante à faible consommation d'énergie basée sur un équipement utilisateur (ue) en double connectivité Download PDF

Info

Publication number
WO2021188852A1
WO2021188852A1 PCT/US2021/023069 US2021023069W WO2021188852A1 WO 2021188852 A1 WO2021188852 A1 WO 2021188852A1 US 2021023069 W US2021023069 W US 2021023069W WO 2021188852 A1 WO2021188852 A1 WO 2021188852A1
Authority
WO
WIPO (PCT)
Prior art keywords
data
total amount
node
transmit power
uplink
Prior art date
Application number
PCT/US2021/023069
Other languages
English (en)
Inventor
Faranaz SABOURI-SICHANI
Daniela Laselva
Original Assignee
Nokia Technologies Oy
Nokia Of America Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Technologies Oy, Nokia Of America Corporation filed Critical Nokia Technologies Oy
Publication of WO2021188852A1 publication Critical patent/WO2021188852A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
    • H04W52/346—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading distributing total power among users or channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations

Definitions

  • the present disclosure is related to 5G new radio, and, in particular, to a 5G low-latency access concept. More specifically, the present disclosure relates to a UE power saving optimization in MR-DC use cases.
  • the present disclosure relates to 5G communication systems, and, in particular, relates to UE power saving in NR.
  • power saving deployment for a single NR connection has been considered.
  • power saving improvements in dual connectivity (DC) would also be viable to consider, particularly in E-UTRA NR Dual Connectivity (EN-DC).
  • the UE can utilize different power saving schemes as specified in 3GPP TR 38.840 (“3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Study on UE Power Saving (Release 16”) whenever the conditions allow.
  • 3GPP TR 38.840 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Study on UE Power Saving (Release 16”) whenever the conditions allow.
  • the UE power consumption reduction will utilize a wide range of techniques to allow UE implementations which can operate with reduced power consumption.
  • the proposed schemes which are very likely to be introduced in 3GPP Release 16 (Rel-16) are listed below.
  • a number of 5G architecture deployment options are defined in 3GPP for independent migration of the access and core networks.
  • the present disclosure will be applicable for any dual connectivity deployment option; however, the examples with details in the present disclosure are based on option 3 (EPC + LTE-assisted 5G NR (EN- DQ), MR-DC with EPC (EN-DC), and the NR-NR dual connectivity (NR-NR DC) among MR-DC options with NGC as shown in Figure 4, which illustrates control and user plane interfaces for EN-DC and NR-NR DC.
  • MR-DC Multi-RAT Dual Connectivity
  • MCG and SCG master and secondary cell groups
  • each cell group contains a primary cell called PCell (for MCG) and a primary SCell, PSCell, (for SCG), as in the legacy DC framework.
  • each gNB, or eNB owns its radio resources and is primarily responsible for allocating radio resources to the UE independently.
  • the MN is responsible for maintaining the RRC connection state transitions, handling the connection setup/release, and initiating the first-time secondary node addition, that is, the DC setup. Any information exchange/coordination between MN and SN takes place via the X2/Xn interface, as shown in Figure 4.
  • the network achieves per-user throughput increase by aggregating radio resources from two NBs.
  • the UE uses only one of the two links for packet data convergence protocol (PDCP) protocol data unit (PDU) transmission as long there is no need for large data amount.
  • PDCP packet data convergence protocol
  • PDU protocol data unit
  • how to perform data transmission on the split DRBs is decided by the MN based on its implementation and related commands being provided to the UE by RRC parameters carrying PDCP configuration. These include two main parameters: As long as the UL data buffer size is below a given limit (defined by the parameter ul- DataSplitThreshold), the UL transmission will use only one RLC entity, namely, the primary RLC entity at the MN ( see 3 GPP TS 36.331 and 3 GPP TS 38.331).
  • the primary entity can be reconfigured, that is, changed, using the parameter ul- DataSplitDRB- ViaSCG (see 3 GPP TS 36.331).
  • the data should be split between the two nodes (see 3GPP TS 36.331 and 3GPPTS 38.331).
  • the UE will then - depending on its data buffer size - transmit on MCG, SCG, or apply split bearer based on the italicized rules below (see Section 5.2, 3GPP TS 38.323):
  • the transmitting PDCP entity shall:
  • Radio Link Control (RLC) protocol specification in the two associated RLC entities is equal to or larger than ul- PataSOlitThreshold: - submit the PDCP PDU to either the primary RLC entity or the secondary RLC entity;
  • MN may ask the SN to provide additional resources to the UE.
  • GBR total guaranteed bit rate
  • the GBR split is typically based on MN’s physical resource block (PRB) load.
  • PRB physical resource block
  • the consequent GBR distribution between MN and SN is used for determining UL grants by MN and SN.
  • the aim of UL data bearer split is to increase the UL throughput for the user, as it enables the UE to utilize radio resources from two NBs. It also provides better user experience in cases where one NB (cell group) link is overloaded or the link towards one NB is degraded.
  • the UL bearer split may also help in network load balancing; hence, MN may calculate the data split ratio based on radio conditions and network load in MCG and SCG similar to downlink bearer splitting. Then, the MN and SN should be able to ensure indirectly that the UE uses the calculated data split ratio, by sending appropriate UL (dynamic) scheduling grants.
  • each node can determine the UL grants based on the requested GBR and the buffer status reporting (BSR) received by the UE. It is noted that the two radio links towards MN and SN will have their independent power control running.
  • the UL power level of each link is controlled by the NW separately through uplink power control based on legacy mechanisms, and is directly proportional to the path loss (PL) between the UE and NB.
  • PL path loss
  • the open-loop power control configuration for PUSCH/SRS, Po, a combined with the UE-estimated PL, is linked to SRS resource indicator (SRI) which indicates the number of configured SRS resources in the SRS resource set for a PUSCH beam (see 3GPP TS 38.213).
  • SRI SRS resource indicator
  • the control of the UE transmit power is done by the network via transmit power control (TPC) commands; hence, the UE has the knowledge about the requested UL transmit power to each node.
  • the required UL transmitter (Tx) power may be higher towards MN than SN or vice versa depending on the UE’s radio link condition, mainly, the path loss for the selected beam due to different distances between the UE and each NB. This difference can be up to several dBs.
  • a UE in EN-DC mode between a macro LTE eNB and an NR small cell may be in proximity of the NR small cell and, therefore, it may be beneficial to transmit the dominant part of UL data DRBs over the NR SN.
  • the power control algorithm at each node would independently ensure that the uplink transmit powers used for transmissions towards each node are adequate, no explicit consideration of the uplink transmit power is taken when making the splitting decision in the prior art.
  • the dominating power consumption at the UE is when it is transmitting due to significant high current consumption in power amplifiers. This is further directly proportional to the absolute UL transmit power, and the ⁇ UL transmit power is directly proportional to the path loss.
  • the corresponding path loss and, hence, the requested UL transmit power can differ by several dBs between the two nodes.
  • the difference in transmit power between the two nodes may also be due to different operating carrier frequencies. Therefore, considering the requested power level toward MN and SN when deciding the primary RLC entity as well as the relative data split across MN and SN would improve UE power saving.
  • Table 1 below, illustrating simulation results of averaged power in units/slots for some DL and UL examples, quantifies the impact of UE power consumption during UL transmission as function of the UL transmit power.
  • Table 1 contains examples showing how the average consumed power by the UE depends on the uplink transmit power of the used link.
  • the examples are generated using the NR UE power consumption model as defined in 3GPP TS 38.840.
  • the model applies time division duplex (TDD), 30 kHz SCS and 100 MHz BW.
  • TDD time division duplex
  • Rel-13 LTE supports uplink bearer split, building on top of the downlink split-bearer architecture with aggregation of data links at PDCP layer, allowing utilization of uplink radio resources on both MCG and SCG links simultaneously for a data bearer.
  • the same framework was inherited by NR.
  • BSR buffer status report
  • GRR configured guaranteed bit rate
  • the BSR is sent from the UE to the gNB/eNB to indicate the amount of pending data in the uplink buffer.
  • two medium access control (MAC) entities are configured to the UE: one for the MCG and one for the SCG.
  • Figure 6 illustrates an exemplary message sequence chart based on the legacy UL data split in dual connectivity. It can be observed that the data available for transmission of a split bearer will be equally reflected in the two equal BSRs, which are sent towards the MCG and SCG.
  • split DRB DC uplink, data plane
  • a buffer size based threshold is used to trigger the use of secondary leg
  • configuration of the primary leg for data plane is according to the following: ul-DataSplitThreshold (see 3 GPP TS 36.331 and 3 GPP TS 38.331]
  • blOO means 100 Bytes
  • b200 means 200 Bytes and so on
  • E-UTRAN only configures this field for split DRBs, ul-DataSplitDRB-ViaSCG (see 3 GPP TS 36.331)
  • E-UTRAN Indicates whether the UE shall send PDCP PDUs via SCG as specified in 3 GPP TS 36.323.
  • E-UTRAN only configures the field, that is, indicates value TRUE, for split DRBs.
  • the primary RLC entity is SCG RLC entity and the secondary RLC entity is MCG RLC entity. If this field is not configured or set to FALSE, the primary RLC entity is MCG RLC entity and the secondary RLC entity is SCG RLC entity,
  • the primary link and when the data should be split is controlled by the network in a semi-static fashion; the relevant parameters are provided via RRC signaling.
  • the present disclosure builds upon both concepts and extends them making the data splitting based on power efficiency and allowing a fast change of the primary leg based on power-efficiency considerations.
  • a method comprises: computing at least one uplink transmit power level required toward each of a master node and a secondary node; determining a total amount of data in a buffer requiring transmission; comparing the total amount of data to a preselected data splitting threshold; when the total amount of data does not exceed the preselected data splitting threshold, sending the total amount of data to the one of the master node and the secondary node having a smaller required uplink transmit power level; and when the total amount of data exceeds the preselected data splitting threshold, preparing a buffer status report and providing the buffer status report for a logical channel to a network including the master node and the secondary node, the buffer status report including the total amount of data and a split of the total amount of data into two portions based on the at least one uplink transmit power level required toward the master node and the at least one uplink transmit power level required toward the secondary node.
  • the split of the total amount of data into two portions may be in inverse proportion to the ratio between the required uplink transmit power levels.
  • the method may further comprise: sending the larger of the two portions of the total amount of data to the one of the master node and the secondary node having a lower required uplink transmit power level,
  • 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 being configured, with the at least one processor, to cause the apparatus to perform the following: compute at least one uplink transmit power level required toward each of a master node and a secondary node; determine a total amount of data in a buffer requiring transmission; compare the total amount of data to a preselected data splitting threshold; when the total amount of data does not exceed the preselected data splitting threshold, send the total amount of data to the one of the master node and the secondary node having a smaller required uplink transmit power level; and when the total amount of data exceeds the preselected data splitting threshold, prepare a buffer status report and provide the buffer status report for a logical channel to a network including the master node and the secondary node, the buffer status report including the total amount of data and a split of the total amount of data into two portions based on the at least one uplink transmit power level required toward the master node and the at
  • the split of the total amount of data into two portions may be in inverse proportion to the ratio between the required uplink transmit power levels.
  • the at least one memory and the computer program code may be further configured, with the at least one processor, to cause the apparatus to perform the following: send the larger of the two portions of the total amount of data to the one of the master node and the secondary node having a lower required uplink transmit power level.
  • an apparatus comprises: means for computing at least one uplink transmit power level required toward each of a master node and a secondary node; means for determining a total amount of data in a buffer requiring transmission; means for comparing the total amount of data to a preselected data splitting threshold; means for sending the total amount of data to the one of the master node and the secondary node having a smaller required uplink transmit power level, when the total amount of data does not exceed the preselected data splitting threshold; and means for preparing a buffer status report and for providing the buffer status report for a logical channel to a network including the master node and the secondary node, the buffer status report including the total amount of data and a split of the total amount of data into two portions based on the at least one uplink transmit power level required toward the master node and the at least one uplink transmit power level required toward the secondary node, when the total amount of data exceeds the preselected data splitting threshold.
  • the split of the total amount of data into two portions may be in inverse proportion to the ratio between the required uplink transmit power levels.
  • the apparatus may further comprise: means for sending the larger of the two portions of the total amount of data to the one of the master node and the secondary node having a lower required uplink transmit power level.
  • a computer program product comprises a non-transitory computer-readable storage medium bearing computer program code embodied therein for use with a computer, the computer program code comprising code for performing: computing at least one uplink transmit power level required toward each of a master node and a secondary node; determining a total amount of data in a buffer requiring transmission; comparing the total amount of data to a preselected data splitting threshold; when the total amount of data does not exceed the preselected data splitting threshold, sending the total amount of data to the one of the master node and the secondary node having a smaller required uplink transmit power level; and, when the total amount of data exceeds the preselected data splitting threshold, preparing a buffer status report and providing the buffer status report for a logical channel to a network including the master node and the secondary node, the buffer status report including the total amount of data and a split of the total amount of data into two portions based on the at least one uplink transmit power level required toward the master node and the at
  • the split of the total amount of data into two portions may be in inverse proportion to the ratio between the required uplink transmit power levels.
  • the computer program code may also comprise code for performing: sending the larger of the two portions of the total amount of data to the one of the master node and the secondary node having a lower required uplink transmit power level.
  • a method comprises: receiving a buffer status report including the total amount of data and an indication of a split of the total amount of data into two portions to be accommodated by each of a first network node and a second network node; allocating the required uplink radio resources to the user equipment for uplink transmission of a first portion of data to the first network node; and when allocating all of the required uplink resources for uplink transmission of the first portion of data to the first network node is not possible, identifying a third portion of data, the third portion of data being a remaining part of the first portion of data, and communicating with the second network node to request the second network node to allocate the required uplink radio resources to the user equipment for uplink transmission of the second portion of data plus the third portion of data.
  • the method may further comprise: allocating the required uplink resources to accommodate the larger of the two portions of data when the at least one uplink transmit power level of the user equipment towards the first network node is lower than that of the second network node.
  • 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 being configured, with the at least one processor, to cause the apparatus to perform the following: receive a buffer status report including the total amount of data and an indication of a split of the total amount of data into two portions to be accommodated by each of a first network node and a second network node; allocate the required uplink radio resources to the user equipment for uplink transmission of a first portion of data to the first network node; and when allocating all of the required uplink resources for uplink transmission of the first portion of data to the first network node is not possible, identify a third portion of data, the third portion of data being a remaining part of the first portion of data, and communicate with the second network node to request the second network node to allocate the required uplink radio resources to the user equipment for uplink transmission of the second portion of data plus the third portion of data.
  • the at least one memory and the computer program code may be further configured, with the at least one processor, to cause the apparatus to perform the following: allocate the required uplink resources to accommodate the larger of the two portions of data when the at least one uplink transmit power level of the user equipment towards the first network node is lower than that of the second network node.
  • an apparatus comprises: means for receiving a buffer status report including the total amount of data and an indication of a split of the total amount of data into two portions to be accommodated by each of a first network node and a second network node; means for allocating the required uplink radio resources to the user equipment for uplink transmission of a first portion of data to the first network node; and means for identifying a third portion of data, the third portion of data being a remaining part of the first portion of data, and for communicating with the second network node to request the second network node to allocate the required uplink radio resources to the user equipment for uplink transmission of the second portion of data plus the third portion of data, when allocating all of the required uplink resources for uplink transmission of the first portion of data to the first network node is not possible.
  • the apparatus may further comprise: means for allocating the required uplink resources to accommodate the larger of the two portions of data when the at least one uplink transmit power level of the user equipment towards the first network node is lower than that of the second network node.
  • a computer program product comprises a non-transitory computer-readable storage medium bearing computer program code embodied therein for use with a computer, the computer program code comprising code for performing: receiving a buffer status report including the total amount of data and an indication of a split of the total amount of data into two portions to be accommodated by each of a first network node and a second network node; allocating the required uplink radio resources to the user equipment for uplink transmission of a first portion of data to the first network node; and, when allocating all of the required uplink resources for uplink transmission of the first portion of data to the first network node is not possible, identifying a third portion of data, the third portion of data being a remaining part of the first portion of data, and communicating with the second network node to request the second network node to allocate the required uplink radio resources to the user equipment for uplink transmission of the second portion of data plus the third portion of data.
  • the computer program code may also comprise code for performing: allocating the required uplink resources to accommodate the larger of the two portions of data when the at least one uplink transmit power level of the user equipment towards the first network node is lower than that of the second network node.
  • Figure 1 shows a simplified block diagram of certain apparatus in which the subject matter of the present disclosure may be practiced.
  • Figures 2 and 3 show an example of New Radio (NR) architecture having the 5G core (5GC) and the NG-RAN.
  • NR New Radio
  • Figure 4 illustrates control and user plane interfaces for EN-DC and NR-
  • Figure 5 illustrates GBR configuration/split across MN and SN at SN addition.
  • Figure 6 illustrates an exemplary message sequence chart for uplink data split in legacy dual connectivity.
  • Figure 7 is a schematic illustration of an exemplary embodiment in which a UL DRB data split in Dual Connectivity is based on requested UL transmit power.
  • Figure 8 is a message sequence chart for the exemplary embodiment (UE- based) when the data size requires UL data split.
  • Figure 9 is a flow chart for an exemplary embodiment of the present disclosure.
  • Figure 10 is a flow chart illustrating a method performed by a user equipment in accordance with the present disclosure.
  • Figure 11 is a flow chart illustrating a method performed by a network node in accordance with the present disclosure.
  • FIG. 1 is a block diagram of one possible and non-limiting example in which the subject matter of the present disclosure may be practiced.
  • the user equipment (UE) 110 is in wireless communication with a wireless network 100.
  • a UE is a wireless device, typically mobile, that can access the wireless network.
  • the UE 110 includes one or more processors 120, one or more memories 125, and one or more transceivers 130 interconnected through one or more buses 127.
  • Each of the one or more transceivers 130 includes a receiver, Rx, 132 and a transmitter, Tx, 133.
  • the one or more buses 127 may be address, data, or control buses, and may include any interconnection mechanism, such as a series of lines on a motherboard or integrated circuit, fiber optics or other optical communication equipment, and the like,
  • the one or more transceivers 130 are connected to one or more antennas 128.
  • the one or more memories 125 include computer program code 123,
  • the UE 110 includes a module 140, comprising one of or both parts 140-1 and/or 140-2, which may be implemented in a number of ways.
  • the module 140 may be implemented in hardware as module 140-1, such as being implemented as part of the one or more processors 120.
  • the module 140-1 may be implemented also as an integrated circuit or through other hardware such as a programmable gate array.
  • the module 140 may be implemented as module 140-2, which is implemented as computer program code 123 and is executed by the one or more processors 120.
  • the one or more memories 125 and the computer program code 123 may be configured, with the one or more processors 120, to cause the user equipment 110 to perform one or more of the operations as described herein.
  • the UE 110 communicates with RAN node 170 via a wireless link 111.
  • the RAN node 170 in this example is a base station that provides access by wireless devices, such as the UE 110, to the wireless network 100.
  • the RAN node 170 in this example is a base station that provides access by wireless devices, such as the UE 110, to the wireless network 100.
  • 5G a base station for 5G, also called New Radio (NR).
  • NR New Radio
  • RAN node 170 may be an NG-RAN node, which is defined as either a gNB or an ng- eNB.
  • a gNB is a node providing NR user plane and control-plane protocol terminations toward the UE, and connected via the NG interface to a 5GC, such as, for example, the network element(s) 190.
  • the ng-eNB is a node providing E-UTRA user plane and control plane protocol terminations towards the UE, and connected via the NG interface to the 5GC.
  • the NG-RAN node may include multiple gNBs, which may also include a centralized unit (CU) (gNB-CU) 196 and distributed unit(s) (DUs) (gNB-DUs), of which
  • the DU may include or be coupled to and control a radio unit
  • the gNB-CU is a logical node hosting RRC, SDAP and PDCP protocols of the gNB or RRC and PDCP protocols of the en-gNB that controls the operation of one or more gNB-DUs.
  • the gNB-CU terminates the FI interface connected with the gNB-DU.
  • the FI interface is illustrated as reference 198, although reference 198 also illustrates a link between remote elements of the RAN node 170 and centralized elements of the RAN node 170, such as between the gNB-CU 196 and the gNB-DU 195.
  • the gNB-DU is a logical node hosting RLC, MAC and PHY layers of the gNB or ng-eNB, and its operation is partly controlled by gNB-CU.
  • One gNB-CU supports one or multiple cells.
  • One cell is supported by only one gNB-DU.
  • the gNB-DU terminates the FI interface 198 connected with the gNB-CU.
  • the DU 195 is considered to include the transceiver 160, for example, as part of a RU, but some examples of this may have the transceiver 160 as part of a separate RU, for example, under control of and connected to the DU 195.
  • the RAN node 170 may also be an eNB (evolved NodeB) base station, for LTE (long term evolution), or any other suitable base station or node.
  • eNB evolved NodeB
  • LTE long term evolution
  • the RAN node 170 includes one or more processors 152, one or more memories 155, one or more network interfaces (N/W I/F(s)) 161, and one or more transceivers 160 interconnected through one or more buses 157.
  • Each of the one or more transceivers 160 includes a receiver, Rx, 162 and a transmitter, Tx, 163.
  • the one or more transceivers 160 are connected to one or more antennas 158.
  • the one or more memories 155 include computer program code 153.
  • the CU 196 may include the processor(s) 152, memories 155, and network interfaces 161. Note that the DU 195 may also contain its own memory/memories and processor(s), and/or other hardware, but these are not shown.
  • the RAN node 170 includes a module 150, comprising one of or both parts 150-1 and/or 150-2, which may be implemented in a number of ways.
  • the module 150 may be implemented in hardware as module 150-1, such as being implemented as part of the one or more processors 152.
  • the module 150-1 may be implemented also as an integrated circuit or through other hardware such as a programmable gate array.
  • module 150 may be implemented as module 150-2, which is implemented as computer program code 153 executed by the one or more processors 152.
  • the one or more memories 155 and the computer program code 153 are configured, with the one or more processors 152, to cause the RAN node 170 to perform one or more of the operations as described herein, Note that the functionality of the module 150 may be distributed, such as being distributed between the DU 195 and the CU 196, or be implemented solely in the DU 195.
  • the one or more network interfaces 161 communicate over a network such as via the links 176 and 131.
  • Two or more gNBs 170 may communicate using, e.g., link 176.
  • the link 176 may be wired or wireless or both and may implement, for example, an Xn interface for 5G, an X2 interface for LTE, or other suitable interface for other standards.
  • the one or more buses 157 may be address, data, or control buses, and may include any interconnection mechanism, such as a series of lines on a motherboard or integrated circuit, fiber optics or other optical communication equipment, wireless channels, and the like.
  • the one or more transceivers 160 may be implemented as a remote radio head (RRH) 195 for LTE or a distributed unit (DU) 195 for gNB implementation for 5G, with the other elements of the RAN node 170 possibly being physically in a different location from the RRH/DU, and the one or more buses 157 could be implemented in part as, for example, fiber optic cable or other suitable network connection to connect the other elements (e.g., a centralized unit (CU), gNB-CU) of the RAN node 170 to the RRH/DU 195.
  • Reference 198 also indicates those suitable network link(s).
  • each cell performs functions, but it should be clear that equipment which forms the cell will perform the functions.
  • the cell makes up part of a base station. That is, there can be multiple cells per base station. For example, there could be three cells for a single carrier frequency and associated bandwidth, each cell covering one-third of a 360° area so that the single base station’s coverage area covers an approximate oval or circle.
  • each cell can correspond to a single carrier and a base station may use multiple carriers. So if there are three 120° cells per carrier and two carriers, then the base station has a total of six cells.
  • the wireless network 100 may include a network element or elements 190 that may include core network functionality, and which provides connectivity via a link or links 181 with a further network, such as a telephone network and/or a data communications network (e.g., the Internet).
  • a further network such as a telephone network and/or a data communications network (e.g., the Internet).
  • core network functionality for 5G may include access and mobility management function(s) (AMF(S)) and/or user plane functions (UPF(s)) and/or session management function(s) (SMF(s)).
  • AMF(S) access and mobility management function(s)
  • UPF(s) user plane functions
  • SMF(s) session management function
  • Such core network functionality for LTE may include MME (Mobility Management Entity)/SGW (Serving Gateway) functionality. These are merely exemplary functions that may be supported by the network element(s) 190, and note that both 5G and LTE functions might be supported.
  • the RAN node 170 is coupled via a link 131 to a network element 190.
  • the link 131 may be implemented as, for example, an NG interface for 5G, or an SI interface for LTE, or other suitable interface for other standards.
  • the network element 190 includes one or more processors 175, one or more memories 171, and one or more network interfaces (N/W I/F(s)) 180, interconnected through one or more buses 185.
  • the one or more memories 171 include computer program code 173.
  • the one or more memories 171 and the computer program code 173 are configured, with the one or more processors 175, to cause the network element 190 to perform one or more operations.
  • the wireless network 100 may implement network virtualization, which is the process of combining hardware and software network resources and network functionality into a single, software-based administrative entity, a virtual network.
  • Network virtualization involves platform virtualization, often combined with resource virtualization.
  • Network virtualization is categorized as either external, combining many networks, or parts of networks, into a virtual unit, or internal, providing network-like functionality to software containers on a single system. Note that the virtualized entities that result from the network virtualization are still implemented, at some level, using hardware such as processors 152 or 175 and memories 155 and 171, and also such virtualized entities create technical effects.
  • the computer-readable memories 125, 155, and 171 may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor-based memory devices, flash memory, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory.
  • the computer-readable memories 125, 155, and 171 may be means for performing storage functions.
  • the processors 120, 152, and 175 may be of any type suitable to the local technical environment, 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 nonlimiting examples.
  • the processors 120, 152, and 175 may be means for performing functions, such as controlling the UE 110, RAN node 170, and other functions as described herein.
  • the various embodiments of the user equipment 110 can include, but are not limited to, cellular telephones such as smart phones, tablets, personal digital assistants (PDAs) having wireless communication capabilities, portable computers having wireless communication capabilities, image capture devices such as digital cameras having wireless communication capabilities, gaming devices having wireless communication capabilities, music storage and playback appliances having wireless communication capabilities, Internet appliances permitting wireless Internet access and browsing, tablets with wireless communication capabilities, as well as portable units or terminals that incorporate combinations of such functions.
  • cellular telephones such as smart phones, tablets, personal digital assistants (PDAs) having wireless communication capabilities, portable computers having wireless communication capabilities, image capture devices such as digital cameras having wireless communication capabilities, gaming devices having wireless communication capabilities, music storage and playback appliances having wireless communication capabilities, Internet appliances permitting wireless Internet access and browsing, tablets with wireless communication capabilities, as well as portable units or terminals that incorporate combinations of such functions.
  • PDAs personal digital assistants
  • portable computers having wireless communication capabilities
  • image capture devices such as digital cameras having wireless communication capabilities
  • gaming devices having wireless communication capabilities
  • music storage and playback appliances having wireless communication capabilities
  • Figures 2 and 3 show an example of New Radio (NR) architecture having the 5G core (5GC) and the NG-RAN.
  • the base stations gNB are coupled to the 5GC by the interface to core NGs, and the gNBs are coupled to each other by the inter-base station interface Xn.
  • a UE power-saving optimization in MR-DC use cases by considering the requested UL transmit power over each radio link in the decision of the DRB’s data distribution between two nodes in case of UL data split. This is achieved by adapting the UL radio resource allocations to the UE from each node based on the UL transmit power to MN and to SN, aided by UE assistance.
  • the disclosure allows the UL DRB’s data to be transmitted primarily over the most power-efficient uplink radio link, that is, the link with lowest requested UL transmit power, while still letting the less power-efficient radio link to contribute to the data delivery in order to reduce the total time for completing the transmissions. That is to say, whenever a split DRB is needed to address higher required throughput, the data split should consider transmitting the maximum portion of data over the most power-efficient radio link and transmit only the remaining portion over the least power efficient radio link. As a result, the total UL transmit power will be minimized, thereby achieving a UE power saving.
  • An exemplary embodiment is based on UE implementation with standard impact, that is, allowing UE to change the decision on the primary leg as well as new UE operation related to BSR.
  • the UE re-evaluates the primary leg based on the UL transmit power required for data transmission towards MN and SN, selecting the most power-efficient leg for the transmission of the total BSR (it is allowed to change the primary link configured by the network)
  • the UE splits the total BSR in two distinct BSRs and calculates the “node- specific” BSRs by splitting its total BSR according to the requested power from each node.
  • ⁇ UE informs the corresponding “node-specific” BSR values to each node along with the total BSR.
  • Each node will then allocate UL radio resources to the UE based on the received “node-specific” BSR and on other local information such as PRB load, GBR, etc.
  • the energy efficient split of BSR by the UE will then guide MN and SN to adjust their radio resource assignment to the UE accordingly, whenever feasible.
  • Exemplary embodiments of the present disclosure propose that the data split of an uplink DRB between MN and SN be based on the requested UL transmit power PUL,MN and PUL.SN. In this way, the total uplink transmit power will be minimized, the total transmission time will be reduced, and power saving will be achieved. These can be realized by applying the following UE-based implementation.
  • the split of the total GBR of the DRB between MN and SN is decided by MN at the time the secondary node is added.
  • the criteria for the split depend on NW implementation and is expected to be, mainly, based on the MN’s PRB load.
  • Each NB will have its independent power control toward the UE and the UE has information on the requested UL transmit power level, PUL.MN and PUL.SN, from each node.
  • the UE Upon request for UL scheduling toward the NB, the UE calculates the UE- power efficient UL data split based on the PUL,MN / PUL,SN and calculates its BSR for MN (BSRMN) and BSR for SN (BSRSN) accordingly, that is, as a function of PUL.MN and PUL.SN with the aim of power efficiency splitting. The UE will then send BSRtotai and BSRMN to MN and BSRtotai and BSRSN to SN.
  • BSRMN BSR for MN
  • BSRSN BSR for SN
  • MN and SN will adopt the UL grants to their respective received BSR, hence, following the UE power saving based UL DRB split.
  • the UE informs the nodes about the amount of data it needs to transmit in its buffer status report (BSR).
  • BSR buffer status report
  • This disclosure proposes that the UE guide the two nodes for overall power-efficient resource allocations by sending two “node-specific” BSR reports, BSRMN and BSRSN, along with its total BSR, BSRtotai (refer to * in Figure 8).
  • the “node-specific” BSR values scale BSR t otai with the optimal total UL transmit power, that is in accordance to the relative UL transmit powers, as shown in the non-limiting example of pseudo-algorithm for energy-efficient BSR calculation below: BSRtotai - BSRMN + BSRSN
  • BSRMN / BSRSN PUL.SN / PUL,MN
  • BSRMN Ceil (PUL.SN/ (PUL,MN + PUL,SN) * BSRtotai)
  • BSRSN BSR totai - BSRMN
  • each node the received “node-specific” BSR will be considered in combination with other existing parameters and factors for UL data split, for example, each node’s PRB load/capacity, GBR target, and Maximum Bit Rate (MBR)) to allocate UL data resources (refer to ** in Figure 8).
  • the node will allocate the maximum capable UL data resources and inform the other node with the remaining part which then can be provided by the other node.
  • the resource allocation at MN and SN is thus based on exchange/alignment of BSR values across MN and SN over Xn/X2 interface without further UE involvement.
  • Each node responds to the UE with its maximum capacity in case the “node-specific” BSR exceeds this value, whereafter the UE can adjust the BSRs to the two nodes accordingly.
  • Figure 9 shows a flow chart for the embodiment of the proposal where the pseudo-algorithm used to calculate the BSR scaling as indicated by (*) and the following adaptation of power-efficient UL resource allocation at the NBs is indicated by (**).
  • Figure 10 is a flow chart illustrating a method performed by a user equipment in accordance with the present disclosure. According to the method, in block
  • the user equipment computes at least one uplink transmit power level required toward each of a master node and a secondary node.
  • the user equipment determines a total amount of data in a buffer requiring transmission.
  • the user equipment compares the total amount of data to a preselected data splitting threshold.
  • the user equipment sends the total amount of data to the one of the master node and the secondary node having a smaller required uplink transmit power level.
  • the user equipment when the total amount of data exceeds the preselected data splitting threshold, the user equipment prepares a buffer status report and provides the buffer status report for a logical channel to a network including the master node and the secondary node, the buffer status report including the total amount of data and a split of the total amount of data into two portions based on the at least one uplink transmit power level required toward the master node and the at least one uplink transmit power level required toward the secondary node.
  • Figure 11 is a flow chart illustrating a method performed by a network node in accordance with the present disclosure.
  • the network node receives a buffer status report including the total amount of data and an indication of a split of the total amount of data into two portions to be accommodated by each of a first network node and a second network node.
  • the network node allocates the required uplink radio resources to the user equipment for uplink transmission of a first portion of data to the first network node.
  • the network node when allocating all of the required uplink resources for uplink transmission of the first portion of data to the first network node is not possible, the network node identifies a third portion of data, the third portion of data being a remaining part of the first portion of data, and communicates with the second network node to request the second network node to allocate the required uplink radio resources to the user equipment for uplink transmission of the second portion of data plus the third portion of data.
  • the various exemplary embodiments 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, although the exemplary embodiments are not limited thereto.
  • the integrated circuit, or circuits may comprise circuitry, as well as possibly firmware, for embodying at least one or more of a data processor or data processors, a digital signal processor or processors, baseband circuitry and radio frequency circuitry that are configurable so as to operate in accordance with the exemplary embodiments of this disclosure.
  • BSR Buffer Status Report BW Band Width CC Component Carrier DC Dual Connectivity DL Downlink DRB Data Radio Bearer eNB eNodeB (4G Base Station) EN-DC E-UTRA NR Dual Connectivity EPC Evolved Packet Core GBR Guaranteed Bit Rate gNB gNodeB (5G Base Station) IE Information Element LTE Long Term Evolution MAC Medium Access Control MBR Maximum Bit Rate MCG Master Cell Group

Landscapes

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

Abstract

L'invention concerne dans un aspect un procédé comprenant le calcul d'au moins un niveau de puissance de transmission de liaison montante requis vers chacun d'un nœud maître et d'un nœud secondaire; la détermination d'une quantité totale de données dans un tampon nécessitant une transmission; la comparaison de la quantité totale de données à un seuil de division de données présélectionné; lorsque la quantité totale de données ne dépasse pas le seuil de division de données présélectionné, l'envoi de la quantité totale de données au nœud maître et au nœud secondaire ayant un niveau de puissance de transmission de liaison montante requis plus petit; et, lorsque la quantité totale de données dépasse le seuil de division de données présélectionné, la préparation d'un rapport d'état de tampon et la fourniture du rapport d'état de tampon pour un canal logique à un réseau comprenant le nœud maître et le nœud secondaire, le rapport d'état de tampon comprenant la quantité totale de données et une division de la quantité totale de données en deux parties sur la base du ou des niveaux de puissance de transmission de liaison montante requis vers le nœud maître et du ou des niveaux de puissance de transmission de liaison montante requis vers le nœud secondaire.
PCT/US2021/023069 2020-03-20 2021-03-19 Division de données de liaison montante à faible consommation d'énergie basée sur un équipement utilisateur (ue) en double connectivité WO2021188852A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202062992574P 2020-03-20 2020-03-20
US62/992,574 2020-03-20

Publications (1)

Publication Number Publication Date
WO2021188852A1 true WO2021188852A1 (fr) 2021-09-23

Family

ID=75498021

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2021/023069 WO2021188852A1 (fr) 2020-03-20 2021-03-19 Division de données de liaison montante à faible consommation d'énergie basée sur un équipement utilisateur (ue) en double connectivité

Country Status (1)

Country Link
WO (1) WO2021188852A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023086705A1 (fr) * 2021-11-12 2023-05-19 Qualcomm Incorporated Techniques d'attribution d'énergie

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2854444A1 (fr) * 2013-09-27 2015-04-01 Panasonic Intellectual Property Corporation of America Mécanisme d'ordonnancement de liaison montante efficace pour connectivité double
EP3116260A1 (fr) * 2015-07-06 2017-01-11 Lg Electronics Inc. Procédé destiné à déclencher un rapport d'état de tampon dans une connectivité double et dispositif associé
US20190069308A1 (en) * 2017-08-12 2019-02-28 Lg Electronics Inc. Method for handling for an uplink split operation in wireless communication system and a device therefor
US20190364517A1 (en) * 2018-05-22 2019-11-28 Qualcomm Incorporated Multiplexing solutions in dual connectivity

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2854444A1 (fr) * 2013-09-27 2015-04-01 Panasonic Intellectual Property Corporation of America Mécanisme d'ordonnancement de liaison montante efficace pour connectivité double
EP3116260A1 (fr) * 2015-07-06 2017-01-11 Lg Electronics Inc. Procédé destiné à déclencher un rapport d'état de tampon dans une connectivité double et dispositif associé
US20190069308A1 (en) * 2017-08-12 2019-02-28 Lg Electronics Inc. Method for handling for an uplink split operation in wireless communication system and a device therefor
US20190364517A1 (en) * 2018-05-22 2019-11-28 Qualcomm Incorporated Multiplexing solutions in dual connectivity

Non-Patent Citations (10)

* Cited by examiner, † Cited by third party
Title
"3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Packet Data Convergence Protocol", 3GPP TS 36.323
"3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Radio Link Control (RLC) protocol specification", 3GPP TS 38.322
"3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Study on UE Power Saving (Release 16", 3GPP TR 38.840
3GPP TS 36.323
3GPP TS 36.331
3GPP TS 38.213
3GPP TS 38.323
3GPP TS 38.331
3GPP TS 38.840
NTT DOCOMO ET AL: "Overall U-plane aspects of UL bearer split", vol. RAN WG2, no. Bratislava, Slovakia; 20150420 - 20150424, 19 April 2015 (2015-04-19), XP050936106, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings_3GPP_SYNC/RAN2/Docs/> [retrieved on 20150419] *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023086705A1 (fr) * 2021-11-12 2023-05-19 Qualcomm Incorporated Techniques d'attribution d'énergie

Similar Documents

Publication Publication Date Title
US10165527B2 (en) Method of efficiently reporting user equipment transmission power and apparatus thereof
US11252671B2 (en) Power control method and apparatus
US9521674B2 (en) Method and apparatus for transmitting and receiving uplink data in mobile communication system
US11647556B2 (en) Negotiation on bearer type configurations
CN104854940A (zh) 用户装置以及发送控制方法
US11924817B2 (en) Wireless communications system, communications device and wireless network infrastructure
US9698936B2 (en) Configuration method, system and device for uplink channel
CN105379392B (zh) 功率使用状态信息的传输方法及装置
US20160205685A1 (en) Uplink Inter-Site Carrier Aggregation Based on UE Transmission Power and Secondary Cell Load
US9307556B2 (en) Shared access of uplink carrier
WO2021188852A1 (fr) Division de données de liaison montante à faible consommation d&#39;énergie basée sur un équipement utilisateur (ue) en double connectivité
CN113348712B (zh) Mimo层数自适应调整方法及相关产品
WO2021194916A1 (fr) Division de données de liaison montante écoénergétique et basée sur un réseau en connectivité double
WO2023197228A1 (fr) Mécanisme de commande de capacité d&#39;équipement utilisateur dans un réseau à nœuds multiples
CN113784427B (zh) 功率控制方法及装置
CN117204058A (zh) 无线通信方法、终端设备和网络设备
CN115529112A (zh) 一种参考信号的发送与配置方法及装置
CN116325601A (zh) 上行传输方法及通信装置
CN115399039A (zh) 通信方法及装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21718704

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21718704

Country of ref document: EP

Kind code of ref document: A1