US20140247765A1 - System and a method of configuring radio access network parameters for a user equipment connected to a wireless network system - Google Patents

System and a method of configuring radio access network parameters for a user equipment connected to a wireless network system Download PDF

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US20140247765A1
US20140247765A1 US14/348,990 US201214348990A US2014247765A1 US 20140247765 A1 US20140247765 A1 US 20140247765A1 US 201214348990 A US201214348990 A US 201214348990A US 2014247765 A1 US2014247765 A1 US 2014247765A1
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user equipment
drx
parameters
drx configuration
ran
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US14/348,990
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English (en)
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Sudhir Kumar Baghel
Venkateswara Rao Manepalli
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Assigned to SAMSUNG ELECTRONICS CO., LTD. reassignment SAMSUNG ELECTRONICS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MANEPALLI, VENKATESWARA RAO, BAGHEL, SUDHIR KUMAR
Publication of US20140247765A1 publication Critical patent/US20140247765A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • 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
    • H04W52/02—Power saving arrangements
    • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • 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
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • 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
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
    • 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
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
    • H04W52/285—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission taking into account the mobility of the user
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the smart phone present in it is configured to enter either an idle mode or a connected mode as and when required.
  • a set of radio access network parameters are configured in the smart phone during either of the modes and during transition between the two.
  • the power consumption by the user equipment may be determined partly by the DRX configuration, other Radio Access Network (RAN) parameters, and number of transitions between the idle and the connected mode by the user equipment.
  • RAN Radio Access Network
  • Each of the applications running in the smart phone contributes to the configuration of the DRX configuration, the transitions, and data traffic characteristics observed between the smart phone and the network system.
  • the network system may be enabled to configure the DRX configuration for the smart phone independently to better configure the data traffic characteristics.
  • the network system may not be fully aware of the smart phone and its related information while configuring the DRX configuration.
  • a better configuration of the DRX configuration results in reduced power consumption of the smart phone making it to last longer in a particular charge-discharge cycle.
  • a method of configuring parameters of a Radio Access Network (RAN) in a wireless network system comprising: receiving a plurality of Discontinuous Reception (DRX) configurations from a network entity of the wireless network system, wherein the plurality of DRX configurations is one of the parameters of the RAN; determining traffic characteristics of applications running in the user equipment; selecting one of the plurality of DRX configurations based on the traffic characteristics associated with the user equipment; and transmitting information on the selected DRX configuration to the network entity so that the network entity applies the selected DRX configuration for the user equipment.
  • DRX Discontinuous Reception
  • FIG. 1 illustrates a block diagram of a network system, in accordance with an embodiment of the present invention.
  • FIG. 2 illustrates schematic view of an exemplary DRX configuration for communication with the user equipment in a wireless networking system.
  • FIG. 3 a illustrates a flow diagram on a process of configuring one of the Radio Access Network (RAN) parameters, Discontinuous Reception (DRX) configuration, in accordance with an embodiment of the present invention.
  • RAN Radio Access Network
  • DRX Discontinuous Reception
  • FIG. 3 e illustrates a flow diagram on a process of the UE indicating to network at change in the traffic characteristics and the UE desiring to change the configuration, in accordance with an embodiment of the present invention.
  • FIG. 4 illustrates a block diagram of a Long Term Evolution (LTE), in accordance with an embodiment of the present invention.
  • LTE Long Term Evolution
  • FIG. 5 illustrates a flow diagram for a process of configuring the RAN parameter, the DRX configuration, in accordance with an embodiment of the present invention.
  • FIG. 6 illustrates a flow diagram illustrating a process 600 of updating the DRX configuration by monitoring channels of an LTE network, in accordance with an embodiment of the present invention.
  • FIG. 8 is a block diagram illustrating an evolved node (eNB) capable of managing the RAN parameter, the DRX configuration, in accordance with an embodiment of the present invention.
  • eNB evolved node
  • a method of managing parameters of a Radio Access Network (RAN) in a wireless network system includes the steps of receiving a plurality of Discontinuous Reception (DRX) configurations from a network entity of the wireless network system, determining traffic characteristics of applications running in the user equipment, selecting one of the plurality of DRX configurations based on the traffic characteristics associated with the user equipment, and transmitting information on the selected DRX configuration to the network entity so that the network entity applies the selected DRX configuration for the user equipment.
  • DRX Discontinuous Reception
  • the network system 100 includes User Equipment (UE) 102 connected to more than one network entities 104 through a wireless network 106 .
  • the UE 102 communicates with the network entities 104 with a set of parameters called Random Access Network (RAN) parameters that configure the network settings enabling the UE 102 to communicate.
  • RAN Random Access Network
  • the UE 102 is a smart phone or an advanced mobile communication device, most of the power consumption of the UE 102 is determined by the RAN parameters.
  • FIG. 2 illustrates schematic view of an exemplary DRX configuration 200 for communication with the user equipment in a wireless networking system.
  • the DRX pattern determined with the help of the UE 102 may at least include one or more of the parameters such as drxInactivityTimer, onDurationTimer, longDRX-Cycle, shortDRX-Cycle, and drxShortCycleTimer.
  • delays in a data connection can be mapped to the activity transions in the system 100 in ways such as short Inter Packet Arrival Duration (IPAD) can be mapped to drx-InactivityTimer 204 of the UE 102 for communication with one of the network entities.
  • a medium IPAD can be mapped to DRX cycle periods (long/short) 206 of the UE 102 for communication with one of the network entities.
  • a long IPAD can be mapped to Connected to Idle transition time of the UE 102 for communication with one of the network entities.
  • the minimum possible continuous data activity after data activity starting events can be mapped to OnDurationTimer 202 of the UE 102 for communication with one of the network entities.
  • the process of traffic monitoring or the DPI involves cost in performing the same, it may not be advantageous to perform traffic monitoring/DPI very frequently.
  • the retrieved parameters can be immediately be used in the new connection as they will be already optimized and if required can be fine-tuned again later in the connection. This saving of the parameters can be either done in the eNB 104 or the MME 106 or any of the network entities.
  • the network entity 104 determines a different set of plurality of DRX configurations; the step is denoted by 324 .
  • a response is sent to the UE 102 by the network entity 104 , at step 326 .
  • the UE 102 selects one among the different set of plurality of DRX configurations at step 328 , a transmission is sent consequently with selected DRX configuration, denoted as 330 .
  • the selected DRX configuration is applied at step 332 by the network entity 104 on the UE 102 . Thereafter, application of DRX configuration is indicated at the UE 102 , denoted as 334 . Thereafter, it is determined whether there is any change in the traffic configurations of the UE 102 , if there is any, steps 328 to 334 is repeated.
  • FIG. 3 c illustrates a flow diagram on a process 300 c of configuring one of the Radio Access Network (RAN) parameters, Discontinuous Reception (DRX) configuration, in accordance with an embodiment of the present invention.
  • RAN Radio Access Network
  • DRX Discontinuous Reception
  • FIG. 3 d illustrates a flow diagram on a process of configuring one of the Radio Access Network (RAN) parameters, Discontinuous Reception (DRX) configuration, in accordance with an embodiment of the present invention.
  • RAN Radio Access Network
  • DRX Discontinuous Reception
  • the process 300 d denotes the effect of change in mobility status of the UE 102 in determining the RAN parameters including the DRX configuration.
  • the connection is established at 304 .
  • the network entity 106 transmits a plurality of DRX configurations to the UE 102 at 306 .
  • the UE 102 determines the traffic characteristics based on the number or types of the applications that are currently being executed in the UE 102 at 308 . Based on the traffic characteristics, the UE 102 selects one among the plurality of DRX configurations and/or other RAN parameters at 310 .
  • the UE 102 transmits information on the selected DRX configuration and/or other RAN parameters to the network entity 106 , denoted as 312 .
  • the network entity 104 applies the selected DRX configuration and/or other RAN parameters in the UE 102 for communication; the step is denoted as 314 . Thereafter, an indication of application of DRX configuration and/or other RAN parameters is displayed at step 334 .
  • the UE 102 indicates a change in the mobility status, it is transmitted at step 344 .
  • the mobility status can be sent to the network entity 104 as a report.
  • the network entity at step 346 determines a need to modify the DRX configurations and/or other RAN parameters, at step 346 .
  • the DRX configuration and/or other RAN parameters is modified and applied at the UE 102 in the step 348 .
  • An indication of applied modified DRX configuration and/or other RAN parameters is provided at step 320 .
  • the mobility status of the UE 102 can be indicated to the network entity 104 in any of the messages or procedures during connection establishment or state transitions.
  • FIG. 3 e illustrates a flow diagram on a process 300 e of the UE 102 indicating to network at change in the traffic characteristics and UE desiring to change the configuration, in accordance with an embodiment of the present invention.
  • the UE 102 sends an indication that either during connection setup or during ongoing connection if application composition in the UE 102 changes.
  • the UE 102 can be a mobile communication device with set of applications running on it, the change in application composition may refer to change in number or types or applications being executed in the mobile communication device.
  • the traffic characteristics changes in the UE 102 as a result of change in application composition.
  • the change in application composition is informed to the network entity 104 such as eNB, at step 350 .
  • the change is intimated to the network entity to make the connection for extended period and make the connected to idle transition faster to save the power used in the UE 102 .
  • DPI Deep Packet Inspection
  • the network entity 104 changes the DRX configuration and other RAN parameters at step 352 .
  • the process 300 e continues with verification by the UE 102 to detect the change in the application composition, denoted at step 354 . If there is any change in the application composition, the UE 102 sends an indication to the network entity 104 .
  • the network entity 104 thereafter, changes the DRX configurations and other RAN parameters for the UE 102 .
  • a predetermined period for this verification of change in the application composition can also be made.
  • the UE 102 can change the predetermined periods for verification based on preferences by user as wells as the network entity 104 .
  • FIG. 4 illustrates a block diagram of a network system 400 such as long term evolution (LTE), according to one embodiment.
  • the system 400 includes Mobile Tele-Communication (MTC) devices 102 A-N (MTC device can also be referred to as user equipment), an evolved Node B (eNodeB) 104 , a mobility management entity (MME) 408 , a Serving Gateway 410 (SGW), a Packet Data Network (PDN) gateway or Packet Gateway (PGW) 412 , an operator IP network 414 , and a Home Subscriber Gateway (HSS) 416 .
  • MTC device can also be referred to as user equipment
  • MME mobility management entity
  • SGW Serving Gateway 410
  • PDN Packet Data Network
  • PGW Packet Gateway
  • HSS Home Subscriber Gateway
  • the wireless network may be any type of wireless network, including networks that comply with the Mobile WiMAX (based on IEEE 802.16e or IEEE 802.16m), 3GPP LTE, 3GPP2 AIE, IEEE 802.20 or other wireless network standards.
  • the plurality of MTCs ( 102 A-N) are also able to communicate directly with each other using the wireless network 104 based on the Mobile WiMAX (based on IEEE 802.16e or IEEE 802.16m), 3GPP LTE, 3GPP2 AIE, IEEE 802.20, WiFi or other wireless network standards.
  • the eNB 104 and the MME 408 are connected via a S1-MME interface 422 .
  • the eNB 104 and the serving gateway 410 are connected via a S1-U interface 418 .
  • the serving gateway 410 is connected to the MME 408 and the PDN gateway 412 via a S11 interface 424 and a S5/S8 interface 420 , respectively.
  • only one eNodeB 104 is illustrated in the system 400 . However, one skilled in the art can realize that there can be more than one eNodeBs in the system 400 . Also, each of these eNodeBs is configured for support MTC devices and/or Legacy devices.
  • eNB 104 is configured to perform functions such as Radio Resource Management (RRM), header compression, encryption, selection of MME, packet routing to SGW, etc.
  • RRM Radio Resource Management
  • the MME 408 involves in mobility, security, PGW and SGW selection, etc.
  • SGW 410 hosts functions such as mobility anchoring, packet inspection, packet routing, buffering.
  • PGW 412 handles functions such as packet filtering, inspection, and packet marking.
  • FIG. 5 illustrates a flow diagram emphasizing on a process 500 of configuring one of the Radio Access Network (RAN) parameters, Discontinuous Reception (DRX) configuration, in accordance with an embodiment of the present invention.
  • RAN Radio Access Network
  • DRX Discontinuous Reception
  • the user equipment (UE) 102 transfers one or more inputs at the CT sub-phase of a first phase, denoted by 504 in the figure to re-configure Radio Access Network (RAN) parameters including the DRX configuration associated with the user equipment 102 .
  • the inputs are transferred to one of the network entities, i.e. one of the eNB 104 , the MME 108 , the SGW 110 , and the PGW 112 .
  • a Deep Packet Inspection (DPI) is performed at the end of the network entities.
  • the DPI can be performed by the eNB 104 to determine data or pack characteristics associated with the user equipment 102 with the network entities.
  • the eNB 104 may use history of data transfer of the user equipment 102 with the network entities.
  • results of the DPI are analysed and changes are incorporated in the RAN parameters including the DRX pattern as a result of reconfiguration.
  • the DRX configuration may be directly or indirectly responsible for data transmission or reception pattern in the user equipment 102 during selective portions of idle mode and connected mode.
  • the reconfigured DRX configuration and other RAN parameters are received at 518 at the UE 102 .
  • a new set of inputs may be sent by the UE 102 to the network entity (one or more combination of eNB 104 , MME 108 , SGW 110 , and PGW 112 ).
  • the step is denoted with a flow line as 522 .
  • the network entity performs the DPI, denoted with a flow line as 524 .
  • a reconfigured DRX pattern and certain RAN parameters with the DPI results incorporated are sent at 526 and then received at the UE 102 , denoted with a flow line as 528 .
  • the connection of the UE 102 is released thereafter with the RAN, Random Access Network.
  • the current DRX configuration and the RAN parameters may be stored, 530 , at one of the network entities (eNB 104 , MME 108 , SGW 110 , and PGW 112 ).
  • the stored DRX configurations and RAN parameters in the one of the network entities will have a life time and can be invalidated after a life time.
  • Up-Link Physical Uplink Control Channel (UL PUCCH) resources may become scarce or unutilized.
  • the UL PUCCH resources need to be tuned along with the mobility status (e.g. number of hand-overs performed, the UE 102 last visited cells, the Doppler frequency, the velocity of the UE 102 that is being reported or measured) and traffic status (traffic characteristics unique to the UE 102 based on applications).
  • the UE 102 when the UE 102 is in low mobility state some of the RAN parameters such as Channel Quality Indicator (CQI), Pre-coding Matrix Indicator (PMI), Rank Indication (RI), and Sound Reference Signal (SRS) do not differ much and when reported on minor changes, it may be perceived as disadvantaged utilization of resources. Reporting of these parameters may be stopped or the frequency of the reporting can be reduced. In other words, the UE 102 can directly report the mobility state such as low, high, medium etc. for which thresholds may be set in the network. Further, reporting of the RAN parameters related to mobility status may be performed by the UE 102 by L2 or L3 signalling.
  • CQI Channel Quality Indicator
  • PMI Pre-coding Matrix Indicator
  • RI Rank Indication
  • SRS Sound Reference Signal
  • the UE 102 starts sending data at step 532 .
  • the connection of the UE 102 with the RAN is re-established at 534 .
  • the stored DRX pattern and the other RAN parameters as mentioned at 530 , is retrieved at 536 and applied for communication with the UE 102 .
  • the retrieval and application of the stored DRX pattern and the other RAN parameters is performed by at least one of the network entities (eNB 104 , MME 108 , SGW 110 , and PGW 112 ).
  • the network entities perform the DPI with respect to the UE 102 .
  • the step is denoted at 538 .
  • the retrieved DRX pattern the other RAN parameters are reconfigured 540 (flow line) and applied 542 (flow line) at the UE 120 .
  • the steps described above may be performed as a cycle or as a continuous improvement process with the UE 102 , in combination with the network entities to achieve an optimum DRX pattern and RAN parameters.
  • FIG. 6 illustrates a flow diagram illustrating a process 600 of updating the DRX configuration by monitoring channels of an LTE network, in accordance with an embodiment of the present invention.
  • the UE 102 in connected mode, 602 the UE 102 may have to follow the DRX configuration though there is no active data, denoted by 606 .
  • the UE 102 In DRX ON duration of the DRX configuration, the UE 102 continuously monitors and decodes Physical Downlink Control Channel (PDCCH).
  • PDCCH Physical Downlink Control Channel
  • the system 100 may need to communicate about DL data status to the UE 102 , denoted by 612 . Thereafter, the UE 102 stops monitoring the DL status.
  • the communication between the UE 102 and the system 100 may encompass, the system 100 sending data indicating at the start of DRX ON period in the DRX configuration that there is no data and the UE 102 can stop decoding PDCCH.
  • 618 of communication may be the UE 102 , by default may not start PDCCH decoding at the start of DRX on period in DRX configuration, for which the system 100 need to send a Down Link-Status Report (DL-SR) to start PDCCH decoding.
  • DL-SR Down Link-Status Report
  • 620 of communication may be that the UE 102 may decode PDCCH for few sub frames from the start of DRX ON and halt PDCCH decoding if no PDCCH is decoded in those sub frames.
  • FIG. 7 is a block diagram illustrating the User Equipment (UE) 102 capable of managing the RAN parameter, the DRX configuration, in accordance with an embodiment of the present invention.
  • UE User Equipment
  • the UE 102 includes a processor 702 , memory 704 , a read only memory (ROM) 706 , a transceiver 708 , a bus 710 , a transmitter 712 , and a receiver 814 .
  • ROM read only memory
  • the processor 702 means any type of computational circuit, such as, but not limited to, a microprocessor, a microcontroller, a complex instruction set computing microprocessor, a reduced instruction set computing microprocessor, a very long instruction word microprocessor, an explicitly parallel instruction computing microprocessor, a graphics processor, a digital signal processor, or any other type of processing circuit.
  • the processor 702 may also include embedded controllers, such as generic or programmable logic devices or arrays, application specific integrated circuits, single-chip computers, smart cards, and the like.
  • the memory 804 may be volatile memory and non-volatile memory.
  • the memory 804 includes a RAN parameters configuring module 816 for managing the RAN parameters, including the DRX configurations.
  • the RAN parameters configuring module 816 may include a predefined set of instructions for different configuration requirements of RAN parameters for variety of modes including Discontinuous Reception mode of the UE 102 . T

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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)
US14/348,990 2011-10-04 2012-10-04 System and a method of configuring radio access network parameters for a user equipment connected to a wireless network system Abandoned US20140247765A1 (en)

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