WO2017003575A1 - Gestion des performances d'une fonction de recherche de petite cellule dans un dispositif de communication à multiples abonnements à multiples veilles - Google Patents

Gestion des performances d'une fonction de recherche de petite cellule dans un dispositif de communication à multiples abonnements à multiples veilles Download PDF

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Publication number
WO2017003575A1
WO2017003575A1 PCT/US2016/033197 US2016033197W WO2017003575A1 WO 2017003575 A1 WO2017003575 A1 WO 2017003575A1 US 2016033197 W US2016033197 W US 2016033197W WO 2017003575 A1 WO2017003575 A1 WO 2017003575A1
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WO
WIPO (PCT)
Prior art keywords
small cell
subscription
processor
communication device
small
Prior art date
Application number
PCT/US2016/033197
Other languages
English (en)
Inventor
Yongsheng Shi
Sitaramanjaneyulu Kanamarlapudi
Dhananjaya Sarma PONUKUMATI
Original Assignee
Qualcomm Incorporated
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
Priority claimed from US14/814,553 external-priority patent/US9642074B2/en
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Publication of WO2017003575A1 publication Critical patent/WO2017003575A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/183—Processing at user equipment or user record carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B

Definitions

  • Wireless devices having multiple subscriber identity modules may communicate with two or more cells of a wireless network.
  • Some multi-subscription multi-standby communication devices may allow two or more network interfaces or subscriber identity modules (SIMs) to share a single radio frequency (RF) resource (e.g., dual-SIM dual-standby, or "DSDS" devices).
  • RF radio frequency
  • the multi-subscription multi- standby communication device may employ a "tune-away" procedure to monitor multiple interfaces in a standby mode by tuning to one network in a primary cell, quickly tuning away to the second network in a second cell for a short time, and then tuning back to the first network to continue a voice or data call.
  • This tune-away procedure may allow the multi-subscription multi-standby communication device to monitor for pages or other indications of incoming messages or data received on the second network.
  • tuning away to another network may interrupt
  • communications with the first network may reduce throughput of
  • the multi-subscription multi-standby communication device may also use a tune-away procedure to receive signals from other cells for cell selection or reselection, as well as to monitor signals other than bearer or control signals from two or more communication networks.
  • system information messages such as master information blocks (MIBs) and system information blocks (SIBs), which the multi- subscription multi-standby communication device may use to establish MIBs and MIBs.
  • MIBs master information blocks
  • SIBs system information blocks
  • system information messages may include scheduling information, a frame offset indication, a number of segments, a repetition rate of system information, and other information that the multi-subscription multi-standby communication device may use to establish communication with a base station.
  • Various embodiments include methods and multi-subscription multi-standby communication devices implementing methods for managing performance of a small cell search function during an active communication session via a first subscription.
  • Various embodiments may include performing a first tune away to a second subscription to receive first small cell information from a first small cell, tuning back to the first subscription after receiving the first small cell information on the second subscription to resume the active communication session on the first subscription, performing a second tune away to the second subscription to receive second small cell information from a second small cell, tuning back to the first subscription after receiving the second small cell information to resume the active communication session, and selecting one of the first small cell and the second small cell for cell reselection based on the first small cell information and the second small cell information.
  • performing a first tune away to a second subscription to receive the first small cell information from the first small cell may include suspending the active communication session on the first subscription.
  • performing the second tune away to the second subscription to receive the second small cell information from the second small cell may include suspending the active communication session on the first subscription.
  • selecting one of the first small cell and the second small cell for cell reselection based on the first small cell information and the second small cell information may include ranking the first small cell and the second small cell based on the first small cell information and the second small cell information.
  • Some embodiments may further include selecting one of the first small cell and the second small cell for cell reselection based on the ranking.
  • Some embodiments may further include performing cell reselection to the selected one of the first small cell and the second small cell.
  • Various embodiments may also include suspending an active communication session via a macro cell on a first subscription, performing a tune away to a second subscription to receive first small cell information from a first small cell, tuning back to the first subscription after receiving the first small cell information on the second subscription to resume the active communication session on the first subscription, determining whether a signal from the first small cell exceeds a signal threshold, and performing cell reselection to the first small cell in response to determining that the signal from the first small cell exceeds the signal threshold.
  • performing cell reselection to the first small cell in response to determining that the signal from the first small cell exceeds the signal threshold may further include selecting for cell reselection the first small cell in response to determining that the signal from the first small cell exceeds the signal threshold.
  • Some embodiments may further include suspending performance of tune aways to the second subscription. Some embodiments may further include determining whether the active communication session has ended, receiving second small cell information from one or more other small cells in response to determining that the active communication session has ended, and ranking the first small cell and the one or more other small cells based on the first small cell information and the second small cell information. Some embodiments may further include selecting one of the first and the one or more other small cells for cell reselection based on the ranking, and performing cell reselection to the selected one of the first and the one or more other small cells.
  • Some embodiments may further include initializing a timer in response to determining that the signal from the first small cell does not exceed the signal threshold, determining whether the timer has elapsed, selecting another small cell from the one or more other small cells in response to determining that the timer has elapsed, and performing a tune away to the second subscription to receive second small cell information from the selected another small cell.
  • Various embodiments further include a multi-subscription multi-standby communication device having a memory, a radio frequency (RF) resource, and a processor coupled to the memory and the RF resource and configured with processor executable instructions to perform operations of the methods described above.
  • RF radio frequency
  • Various embodiments include a multi-subscription multi-standby communication device having means for performing functions of the methods described above.
  • Various embodiments include a non-transitory processor-readable storage medium having stored thereon processor-executable instructions configured to cause a processor of a multi-subscription multi-standby communication device to perform operations of the methods described above.
  • FIG. 1 is a component block diagram of a communication system suitable for use with various embodiments.
  • FIG. 2 is a component block diagram of a multi-subscription multi-standby communication device according to various embodiments.
  • FIG. 3 is a process flow diagram illustrating a method for managing performance of a small cell search function in a multi-subscription multi-standby communication device according to various embodiments.
  • FIG. 4 is another process flow diagram illustrating a method for managing performance of a small cell search function in a multi-subscription multi-standby communication device according to various embodiments.
  • FIG. 5 is another process flow diagram illustrating a method for managing performance of a small cell search function in a multi-subscription multi-standby communication device according to various embodiments.
  • FIG. 6 is another process flow diagram illustrating a method for managing performance of a small cell search function in a multi-subscription multi-standby communication device according to various embodiments.
  • FIG.7 is a component block diagram of a mobile communication device suitable for use with various embodiments.
  • Various embodiments include methods implemented in multi-subscription multi-standby communication devices that enable managing the performance of a small cell search function to receive signals from one or more small cells in a manner that reduces the impact of the search function on an active communication session.
  • ком ⁇ онент may be, but is not limited to, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer.
  • a component may be, but is not limited to, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer.
  • a multi-subscription multi-standby communication device may employ a tune-away procedure to monitor multiple interfaces using a single shared RF resource in which the shared RF resource is tuned to a first network (i.e., tuned to a carrier signal associated with the first network), subsequently tuned away to a second network for a short time (i.e., tuning to another carrier signal of the second network), and then tuned back to the first network to continue a voice or data call.
  • This tune-away procedure may enable the multi- subscription multi-standby communication device to monitor system information from two or more communication networks.
  • the tune-away procedure may also allow the multi-subscription multi-standby communication device to support an active call on a first subscription with a first network while monitoring for pages or other indications of incoming messages or data on a second subscription received from a second network.
  • CSG Closed Subscriber Group
  • small cells e.g., smaller base stations, such as femtocells or picocells
  • a group of subscribers sometimes a closed group
  • small cells may be deployed in coverage holes or other areas of weak coverage within a coverage area of a macro cell.
  • the small cells may also be deployed just beyond the coverage area of the macro cell, to extend network coverage.
  • a multi-subscription multi-standby communication device may obtain a list of CSGs associated with macro cells, and use this list to identify small cells with which service may be obtained.
  • the multi-subscription multi-standby communication device may obtain this list of CSGs from a number of sources, such as from a macro cell with which the multi-subscription multi-standby communication device has established communication, from another network element of a communication network, by scanning for signals from small cells in the vicinity, or by another process.
  • the communication device may periodically scan signals of the small cells using a search function to determine whether to select one of the smaller cells for cell selection or cell reselection.
  • a search function such as an autonomous search function (ASF)
  • ASF autonomous search function
  • problems may arise when a multi-subscription multi-standby communication device is conducting an active communication session on a first subscription (such as a packet switched communication session or another active communication session) and the multi- subscription multi-standby switches to a second subscription to perform the small cell search function.
  • the small cell search function may be relatively time- consuming, and thus could require so much time that the active call on the first subscription is dropped.
  • the multi-subscription multi-standby communication device when the multi-subscription multi-standby communication device is highly mobile (e.g., in a moving vehicle), by the time the device has completed scanning all of the nearby small cells, signals received from the macro cell may be insufficient to support the active communication session (i.e., a signal strength is too low, a data rate is insufficient, an error rate is too high, or another characteristic of the macro cell signals). Further, if the multi-subscription multi-standby communication device defers performing the search function until the active communication session has ended, the multi-standby communication device may move out of the coverage area of the macro cell and may miss an opportunity to perform cell reselection to a small cell.
  • Various embodiments provide methods implemented by a processor in a multi-subscription multi-standby communication device that may manage
  • a multi-subscription multi-standby communication device that is conducting an active communication session via a macro cell on a first subscription may determine to perform a small cell search function to receive signals and small cell information from one or more small cells.
  • the small cell information may include one or more information blocks, such as a master information block (MIB) or a system information block (SIB).
  • MIB master information block
  • SIB system information block
  • the multi-subscription multi-standby communication device may limit the performance of the small cell search function to reduce the impact of the search function on the active communication session.
  • the multi-subscription multi-standby communication device may stagger the performance of the small cell search function in order to limit the duration of any single tune-away from the active communication session.
  • the multi-subscription multi-standby communication device may temporarily suspend the active communication session on the first subscription to perform a tune away (i.e., tune away its radio resource) to a first small cell signal, and resume the active communication session after receiving first small cell information from a first small cell instead of scanning for another small cell signal.
  • the multi- subscription multi-standby communication device may tune away to receive the small cell information of a second subscription, and then tune back to the first subscription to continue supporting the active communication session after receiving the second small cell information from the second small cell.
  • This process or temporarily tuning- away to one small cell to receive small cell information, resuming the active communication session for a time, temporarily tuning away to one small cell to receive small cell information, and tuning back to resuming the active communication session for a time may be repeated until small cell information is received from all small cells in a list or with adequate signal strength, after which the multi-standby communication device may determine whether a cell reselection to one of the small cells should be conducted.
  • the multi-subscription multi-standby communication device may make this determination by ranking the plurality of small cells based on their respective small cell information, and selecting one of the small cells for cell reselection based on its rank and measurements.
  • the multi-subscription multi-standby communication device may initialize a timer having a particular duration, and after the timer elapses the multi- subscription multi-standby communication device may tune away its radio resource to a second (or to another) small cell signal.
  • the multi- subscription multi-standby communication device may dynamically determine the timer duration. Dynamic determination of the timer duration may enable the receipt of sufficient small cell information while mitigating inaccuracies in the reception of the small cell information.
  • the timer duration is too long, the communication devices measurements may be inaccurate, and a highly mobile communication device may move out of effective communication range with the macro cell; if the timer duration is too short, performance of the small cell search function may degrade the quality and/or performance of the active communication session.
  • the processor may determine the timer duration based on a mobility of the multi-subscription multi-standby communication device (e.g., a speed, a location, and/or other factors).
  • the processor may also determine the timer duration based on an uplink data buffer status of the multi-subscription multi- standby communication device, such as whether the multi-subscription multi-standby communication device has data buffered for transmission to the macro cell, a quantity of data that is buffered, and/or a priority level of the buffered data.
  • the processor may also determine the timer duration based on data transmission characteristics, such as whether data transmission from the multi- subscription multi-standby communication device is relatively continuous or relatively bursty. For example, a rate of data transmission may be relatively constant (i.e., within a threshold over a period of time), or may be relatively variable (i.e., exceeds a threshold over a period of time).
  • references to "first network,” “first subscription,” “second network” and “second subscription” herein are arbitrary and are used to refer to two or more subscriptions/networks generally because at any given time either
  • subscription/network may be in an active mode (on an active voice or data call) or a standby mode, and all subscriptions/networks may need to monitor for system information (e.g., for network SIB transmissions).
  • references to "first" and “second" subscriptions and networks are not intended to imply that the embodiments are limited to two subscriptions sharing one RF resource, because three or more subscriptions may share one RF resource provided that only one subscription can use the RF resource at a time.
  • Third and fourth subscriptions would behave similar to a second subscription. Therefore, in the interest of brevity, operations of subscriptions in the standby mode that share the RF resource during tune-away periods are described generally with reference to the "second" subscription.
  • a first communication network 102 and a second communication network 104 each may include a plurality of cellular base stations (e.g., a first base station 130, a second base station 140, and a third base station 150).
  • a multi-subscription multi-standby communication device 110 may communicate with the first communication network 102 through a communication link 132 to the first base station 130.
  • the multi- subscription multi-standby communication device 110 may also communicate with the second communication network 104 through a communication link 142 to the second base station 140 and through a communication link 152 to the third base station 150.
  • the first base station 130 may communicate with the first communication network 102 over a wired or wireless communication link 134
  • the second base station 140 may communicate with the second communication network 104 over a wired or wireless communication link 144
  • the third base station 150 may communicate with the second communication network 104 over a wired or wireless communication link 154.
  • the communication links 134, 144, 154 may include fiber optic backhaul links, microwave backhaul links, and other similar communication links.
  • the first base station 130 may be a macro cell, such as a large cellular communication base station or other access point, and the second and third base stations 140, 150 may be small cells, such as femtocells, picocells, or other relatively smaller base stations or access points.
  • a network operator may deploy the second and third base stations 140, 150 to extend the coverage area of the first base station 130.
  • the second and third base stations 140, 150 may be members of a CSG. While FIG. 1 illustrates only the second and third base stations 140, 150, the communication systems 100 may include additional base stations (i.e., a fourth base station, a fifth base station, etc.) without limitation.
  • Each of the communication networks 102 and 104 may support
  • each of the communication links 132, 134, 142, 144, 152, and 154 may include cellular connections that may be made through two-way wireless communication links using one or more radio access technologies (RATs).
  • RATs may include 3GPP Long Term Evolution (LTE), Worldwide Interoperability for Microwave Access (WiMAX), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Wideband CDMA (WCDMA), Global System for Mobility (GSM), and other RATs.
  • LTE Long Term Evolution
  • WiMAX Worldwide Interoperability for Microwave Access
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • WCDMA Wideband CDMA
  • GSM Global System for Mobility
  • the communication links 132, 134, 142, 144, 152, and 154 are illustrated as single links, each of the communication links may include a plurality of frequencies or frequency bands, each of which may include a plurality of logical channels. Additionally, each of the communication links 132, 134, 142,
  • FIG. 2 is a component block diagram of a multi-subscription multi-standby communication device 200 suitable for implementing various embodiments.
  • the multi-subscription multi- standby communication device 200 may be similar to the multi- subscription multi- standby communication device 110.
  • the communication device 200 may include a first SIM interface 202a, which may receive a first identity module SIM-1 204a that is associated with a first subscription.
  • the multi-subscription multi-standby communication device 200 may optionally also include a second SIM interface 202b, which may receive a second identity module SIM-2 204b that is associated with a second subscription.
  • a SIM in various embodiments may be a Universal Integrated Circuit Card (UICC) that is configured with SIM and/or USIM (Universal Subscriber Identity Module) applications, enabling access to, for example, GSM and/or Universal Mobile Telecommunications System (UMTS) networks.
  • UICC Universal Mobile Telecommunications System
  • the UICC may also provide storage for a phone book and other applications.
  • a SIM in a CDMA network, may be a UICC removable user identity module (R-UIM) or a CDMA subscriber identity module (CSIM) on a card.
  • R-UIM UICC removable user identity module
  • CCM CDMA subscriber identity module
  • Each SIM card may have a CPU, ROM, RAM, EEPROM and I/O circuits.
  • a SIM used in various embodiments may contain user account information, an international mobile subscriber identity (IMSI), a set of SIM application toolkit (SAT) commands and storage space for phone book contacts.
  • IMSI international mobile subscriber identity
  • SAT SIM application toolkit
  • a SIM card may further store a Home-Public-Land-Mobile-Network (HPLMN) code to indicate the SIM card network operator provider.
  • HPLMN Home-Public-Land-Mobile-Network
  • An Integrated Circuit Card Identity (ICCID) SIM serial number may be printed on the SIM card for identification.
  • the multi-subscription multi-standby communication device 200 may include at least one controller, such as a general-purpose processor 206, which may be coupled to a coder/decoder (CODEC) 208.
  • the CODEC 208 may in turn be coupled to a speaker 210 and a microphone 212.
  • the general-purpose processor 206 may also be coupled to at least one memory 214.
  • the memory 214 may be a non-transitory computer-readable storage medium that stores processor-executable instructions.
  • the memory 214 may store an operating system (OS), as well as user application software and executable instructions.
  • the memory 214 may also store application data, such as an array data structure.
  • the general-purpose processor 206 may be coupled to a modem 230.
  • the modem 230 may include at least one baseband modem processor 216, which may be coupled to a memory 222 and a modulator/demodulator 228.
  • the baseband modem processor 216 may include physically or logically separate baseband modem processors (e.g., BB1, BB2).
  • the modulator/demodulator 228 may receive data from the baseband modem processor 216 and may modulate a carrier signal with encoded data and provide the modulated signal to an RF resource 218 for transmission.
  • the modulator/demodulator 228 may also extract an information-bearing signal from a modulated carrier wave received from the RF resource 218, and may provide the demodulated signal to the baseband modem processor 216.
  • the baseband modem processor 216 may include physically or logically separate baseband modem processors (e.g., BB1, BB2).
  • the modulator/demodulator 228 may receive data from the base
  • modulator/demodulator 228 may be or include a digital signal processor (DSP).
  • DSP digital signal processor
  • the baseband modem processor 216 may read and write information to and from the memory 222.
  • the memory 222 may also store instructions associated with a protocol stack, such as protocol stack S I 222a and protocol stack S2 222b.
  • the protocol stacks S 1 222a, S2 222b generally include computer executable instructions to enable communication using a radio access protocol or communication protocol.
  • Each protocol stack S I 222a, S2 222b typically includes network protocol layers structured hierarchically to provide networking capabilities.
  • the modem 230 may include one or more of the protocol stacks S I 222a, S2 222b to enable communication using one or more RATs.
  • the protocol stacks S I 222a, S2 222b may be associated with a SIM card (e.g., SIM-1 204a, SIM-2 204b) configured with a subscription.
  • a SIM card e.g., SIM-1 204a, SIM-2 204b
  • the protocol stack S 1 222a and the protocol stack S2 222b may be associated with the SIM-1 204a.
  • the illustration of only two protocol stacks S I 222a, S2 222b is not intended as a limitation, and the memory 222 may store more than two protocol stacks (not illustrated).
  • Each SIM and/or RAT in the multi-subscription multi-standby communication device 200 may be coupled to the modem 230 and may be associated with or permitted to use the RF resource 218.
  • SIM-1 204a, SIM-2 204b may be coupled to the modem 230 and may be associated with or permitted to use the RF resource 218.
  • the RF resource 218 may share a common baseband modem processor 216 to perform baseband/modem functions for all RATs on the multi-subscription multi-standby communication device.
  • the RF resource 218 may include the physically or logically separate baseband processors (e.g., BB1, BB2).
  • the RF resource 218 may include transceivers associated with one or more RATs and may perform transmit/receive functions for the mobile communication device 200 on behalf of their respective RATs.
  • the RF resource 218 may include separate transmit and receive circuitry.
  • the RF resource 218 may be coupled to a wireless antenna (e.g., the wireless antenna 220).
  • the RF resource 218 may also be coupled to the modem 230 (e.g., via the modulator/demodulator 228, or alternatively via the baseband modem processor 216 or another component).
  • the general-purpose processor 206, memory 214, baseband processor(s) 216, and the RF resource 218 may be included in the mobile communication device 200 as a system-on-chip.
  • the first and second SIMs 204a, 204b and their corresponding interfaces 202a, 202b may be external to the system-on-chip.
  • various input and output devices may be coupled to components on the system-on-chip, such as interfaces or controllers.
  • Example user input components suitable for use in the mobile communication device 200 may include, but are not limited to, a keypad 224 and a touchscreen display 226.
  • the keypad 224, the touchscreen display 226, the microphone 212, or a combination thereof may perform the function of receiving the request to initiate an outgoing call.
  • the touchscreen display 226 may receive a selection of a contact from a contact list or receive a telephone number.
  • either or both of the touchscreen display 226 and microphone 212 may perform the function of receiving a request to initiate an outgoing call.
  • the touchscreen display 226 may receive selection of a contact from a contact list or receive a telephone number.
  • the request to initiate the outgoing call may be in the form of a voice command received via the microphone 212.
  • Interfaces may be provided between the various software modules and functions in the multi-subscription multi-standby communication device 200 to enable communication between them.
  • the two SIMs 204a, 204b, the baseband processor(s) 216, RF resource 218 and the antenna 220 may enable communications on two or more RATs.
  • one SIM, baseband processor and RF resource may be configured to support two different RATs.
  • more RATs may be supported on the multi-subscription multi-standby communication device 200 by adding more SIM cards, SIM interfaces, RF resources, and antennas for connecting to additional mobile networks.
  • FIG. 3 illustrates a method 300 for managing performance of a small cell search function in a multi-subscription multi-standby communication device according to some embodiments.
  • the method 300 may be implemented by a multi-subscription multi-standby communication device (e.g., the multi-subscription multi-standby communication device 110, 200), such as under the control of a processor (e.g., the general-purpose processor 206, the baseband processor 216, a separate controller, and/or the like) executing operations of the method.
  • a processor e.g., the general-purpose processor 206, the baseband processor 216, a separate controller, and/or the like
  • the multi-subscription multi-standby communication device may conduct an active communication session with a macro cell (e.g., the first base station 130) on a first subscription.
  • a macro cell e.g., the first base station 130
  • Some network providers may extend and/or supplement the coverage area of macro cells by deploying one or more small cells near a macro cell.
  • a multi-subscription multi-standby device may include a list of small cells associated with the macro cell, and the multi-subscription multi-standby device may periodically scan signals of the small cells to determine whether to select one of the smaller cells for cell selection or cell reselection.
  • the multi-subscription multi-standby device may suspend the active communication session via the macro cell on the first subscription.
  • the multi-subscription multi-standby device may perform a tune away to a second subscription to receive first small cell information from a first small cell (e.g., the base station 140).
  • the multi-subscription multi-standby device may receive the first small cell system information from the first small cell on the second subscription, such as master information blocks (MIBs) and/or system information blocks (SIBs).
  • MIBs master information blocks
  • SIBs system information blocks
  • the multi-subscription multi-standby device may tune back to the first subscription after receiving the first small cell information on the second subscription.
  • the multi-subscription multi-standby device may resume the active communication session on the first subscription.
  • the multi-subscription multi-standby device may again suspend the active communication session via the macro cell on the first subscription.
  • the multi-subscription multi-standby device may perform a tune away to the second subscription to receive a second small cell information from a second small cell (e.g., the base station 150).
  • the multi-subscription multi-standby device may receive second small cell system information from the second small cell on the second subscription.
  • the multi-subscription multi-standby device may tune back to the first subscription after receiving the second small cell information on the second subscription.
  • the multi-subscription multi-standby device may resume the active communication session on the first subscription.
  • the multi-subscription multi-standby device (e.g., a processor thereof) may rank the first and second small cells based on the first and second small cell information.
  • the device processor may select one of the first and second small cells for cell reselection based on the ranking.
  • the multi- subscription multi-standby device may perform the cell reselection to the selected small cell.
  • FIG. 4 illustrates a method 400 for a method for managing performance of a small cell search function in a multi-subscription multi-standby communication device according to some embodiments.
  • the method 400 may be implemented by a multi-subscription multi-standby communication device (e.g., the multi-subscription multi-standby communication device 110, 200), such as under the control of a processor (e.g., the general-purpose processor 206, the baseband processor 216, a separate controller, and/or the like) executing operations of the method.
  • a processor e.g., the general-purpose processor 206, the baseband processor 216, a separate controller, and/or the like
  • the multi-subscription multi-standby communication device may perform operations of like numbered blocks of the method 300 as described.
  • the device processor may determine a timer duration.
  • the device processor may use the timer duration to stagger or delay the performance of the small cell search function to reduce the impact of the small cell search function on the active communication session.
  • the device processor may dynamically determine the timer duration. Dynamic determination of the timer duration enables the receipt of sufficient small cell information while mitigating inaccuracies in the reception of the small cell information. For example, if the timer duration is too long, the communication devices measurements may be inaccurate, and a highly mobile communication device may move out of effective communication range with the macro cell; if the timer duration is too short, performance of the small cell search function may degrade the quality and/or performance of the active communication session.
  • the device processor may determine the timer duration, in block 402, based on a mobility of the multi-subscription multi-standby communication device (e.g., a speed, a location, and/or other factors). For example, the device processor may determine the mobility of the multi-subscription multi- standby communication device using Global Positioning System (GPS) data, base station triangulation, information received from the first and/or second communication network, or another similar mobility determination process.
  • GPS Global Positioning System
  • the processor may also (or alternatively) determine the timer duration based on an uplink data buffer status of the multi-subscription multi-standby communication device, such as whether the multi-subscription multi-standby communication device has data buffered for transmission to the macro cell, a quantity of data that is buffered, and/or a priority level of the buffered data.
  • the processor may also (or alternatively) determine the timer duration based on data transmission characteristics of data transmitted from the multi-subscription multi-standby communication device, such as whether data transmission from the multi-subscription multi-standby communication device is relatively continuous or relatively bursty.
  • a relatively continuous rate of data transmission may be relatively constant (i.e., a variation in the rate of data transmission is within a threshold over a period of time).
  • a relatively bursty rate of data transmission may be relatively variable (i.e., a variation in the rate of data transmission exceeds a threshold over a period of time).
  • the multi-subscription multi-standby communication device may resume the active communication session on the first subscription.
  • the device processor may initialize a timer using the timer duration.
  • the device processor may cause the multi- subscription multi-standby communication device to suspend the active communication session via a macro cell on the first subscription, in block 312.
  • the device processor may use the timer duration to stagger or delay the performance of the small cell search function to reduce the impact of the small cell search function on the active communication session.
  • FIG. 5 illustrates a method 500 for a method for managing performance of a small cell search function in a multi-subscription multi-standby communication device (e.g., the multi-subscription multi-standby communication device 110, 200 in FIGS. 1 and 2) according to some embodiments.
  • the method 500 may be implemented by a multi-subscription multi-standby communication device (e.g., the multi-subscription multi-standby communication device 110, 200), such as under the control of a processor (e.g., the general-purpose processor 206, the baseband processor 216, a separate controller, and/or the like) executing operations of the method.
  • the method 500 may be performed in a multi-subscription multi-standby communication device (e.g., the multi-subscription multi-standby communication device 110, 200), such as under the control of a processor (e.g., the general-purpose processor 206, the baseband processor 216, a separate controller, and/or the like) executing operations of the method.
  • the method 500
  • the multi-subscription multi-standby communication device may perform operations of like numbered blocks of the method 300 and the method 400 as described.
  • the multi-subscription multi-standby communication device may conduct an active communication session with a macro cell on a first
  • the device processor may determine a timer duration.
  • the multi-subscription multi-standby communication device may suspend the active communication session via the macro cell on the first subscription.
  • the multi-subscription multi-standby communication device may perform a tune away to a second subscription to receive small cell information from a small cell (e.g., the base station 140).
  • the device processor may select the small cell from among a plurality of small cells.
  • the device processor may identify the plurality of small cells from one or more identifiers of the small cells on the multi-subscription multi-standby communication device.
  • the small cell identifiers may, for example, be stored in a memory of the multi-subscription multi-standby communication device as a data structure, such as a list, an array, a document, a spreadsheet, or another data structure,
  • the multi-subscription multi-standby communication device may tune back to the first subscription after receiving the small cell information on the second subscription.
  • the multi-subscription multi-standby communication device may tune back to the first subscription after receiving the small cell information on the second subscription.
  • the communication device may resume the active communication session on the first subscription.
  • the device processor may rank the small cells based on the small cell information that was received by the device processor, in block 508. In block 510, the device processor may select one of the small cells for cell re selection based on the ranking. In block 324, the multi- subscription multi-standby communication device may perform the cell reselection to the selected small cell.
  • FIG. 6 illustrates a method 600 for a method for managing performance of a small cell search function in a multi-subscription multi-standby communication device according to some embodiments.
  • the method 600 may be implemented by a multi-subscription multi-standby communication device (e.g., the multi-subscription multi-standby communication device 110, 200), such as under the control of a processor (e.g., the general-purpose processor 206, the baseband processor 216, a separate controller, and/or the like) executing operations of the method.
  • a processor e.g., the general-purpose processor 206, the baseband processor 216, a separate controller, and/or the like
  • the device processor may select for cell reselection a small cell that can support a threshold level of communications for the multi-subscription multi-standby communication device, and may delay scanning of any remaining small cells.
  • the multi-subscription multi- standby communication device may perform operations of like numbered blocks of the methods 300, 400 and 500 as described.
  • the device processor may determine whether a signal from a small cell exceeds the signal threshold, in block 602.
  • the signal threshold may include a signal strength indication, a minimum data rate, a maximum data error rate, or another similar signal threshold indicating that a small cell may support a threshold level of communications for the multi-subscription multi- standby communication device.
  • Examples of signal strength indications include a reference signal received power (RSRP), a received signal strength indicator (RSSI), a reference signal received quality (RSRQ), a channel quality indicator (CQI), or another similar signal strength indication.
  • the communication device may suspend performance of tune aways to the second subscription.
  • the device processor may receive small cell information from one or more other small cells from among the plurality of small cells, in block 614.
  • the device processor may use the first and/or second subscription to receive the small cell information from the other small cells.
  • the device processor may rank the plurality of small cells based on the received small cell information.
  • the device processor may select a small cell for cell reselection from among the ranked plurality of small cells.
  • the device processor may perform the cell reselection to the selected one of the first and other small cells. In some embodiments, the device processor may select the first small cell, and the device processor may remain in communication with the first small cell rather than performing cell reselection to another small cell.
  • a device processor may mitigate the impact of the performance of the small cell search function on the active communication session by selecting for cell reselection a small cell that can support a threshold level of communications for the multi-subscription multi-standby communication device, and delaying or abandoning scanning of any remaining small cells.
  • the mobile communication device 700 may include a processor 702 coupled to a touchscreen controller 704 and an internal memory 706.
  • the processor 702 may be one or more multi-core integrated circuits designated for general or specific processing tasks.
  • the internal memory 706 may be volatile or nonvolatile memory, and may also be secure and/or encrypted memory, or unsecure and/or unencrypted memory, or any combination thereof.
  • the touchscreen controller 704 and the processor 702 may also be coupled to a touchscreen panel 712, such as a resistive-sensing touchscreen, capacitive-sensing touchscreen, infrared sensing touchscreen, etc. Additionally, the display of the mobile communication device 700 need not have touch screen capability.
  • the mobile communication device 700 may have two or more radio signal transceivers 708 (e.g., Peanut, Bluetooth, ZigBee, Wi-Fi, RF radio) and antennae 710, for sending and receiving communications, coupled to each other and/or to the processor 702.
  • the transceivers 708 and antennae 710 may be used with the above- mentioned circuitry to implement the various wireless transmission protocol stacks and interfaces.
  • the mobile communication device 700 may include one or more cellular network wireless modem chip(s) 716 coupled to the processor and antennae 710 that enables communication via two or more cellular networks via two or more radio access technologies.
  • the mobile communication device 700 may include a peripheral device connection interface 718 coupled to the processor 702.
  • the peripheral device connection interface 718 may be singularly configured to accept one type of connection, or may be configured to accept various types of physical and communication connections, common or proprietary, such as USB, Fire Wire,
  • the peripheral device connection interface 718 may also be coupled to a similarly configured peripheral device connection port (not shown).
  • the mobile communication device 700 may also include speakers 714 for providing audio outputs.
  • the mobile communication device 700 may also include a housing 720, constructed of a plastic, metal, or a combination of materials, for containing all or some of the components discussed herein.
  • the communication device 700 may include a power source 722 coupled to the processor 702, such as a disposable or rechargeable battery.
  • the rechargeable battery may also be coupled to the peripheral device connection port to receive a charging current from a source external to the mobile communication device 700.
  • the communication device 700 may also include a physical button 724 for receiving user inputs.
  • the mobile communication device 700 may also include a power button 726 for turning the mobile communication device 700 on and off.
  • the processor 702 may be any programmable microprocessor, microcomputer or multiple processor chip or chips that can be configured by software instructions (applications) to perform a variety of functions, including the functions of various embodiments described below. In some mobile communication devices, multiple processors 702 may be provided, such as one processor dedicated to wireless communication functions and one processor dedicated to running other applications. Typically, software applications may be stored in the internal memory 706 before they are accessed and loaded into the processor 702. The processor 702 may include internal memory sufficient to store the application software instructions.
  • Various embodiments may be implemented in any number of single or multiprocessor systems.
  • processes are executed on a processor in short time slices so that it appears that multiple processes are running simultaneously on a single processor.
  • information pertaining to the current operating state of the process is stored in memory so the process may seamlessly resume its operations when it returns to execution on the processor.
  • This operational state data may include the process's address space, stack space, virtual address space, register set image (e.g., program counter, stack pointer, instruction register, program status word, etc.), accounting information, permissions, access restrictions, and state information.
  • a process may spawn other processes, and the spawned process (i.e., a child process) may inherit some of the permissions and access restrictions (i.e., context) of the spawning process (i.e., the parent process).
  • a process may be a heavy-weight process that includes multiple lightweight processes or threads, which are processes that share all or portions of their context (e.g., address space, stack, permissions and/or access restrictions, etc.) with other processes/threads.
  • a single process may include multiple lightweight processes or threads that share, have access to, and/or operate within a single context (i.e., the processor's context).
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • a general-purpose processor may be a microprocessor, but, in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of communication devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more
  • microprocessors in conjunction with a DSP core, or any other such configuration.
  • some blocks or methods may be performed by circuitry that is specific to a given function.
  • the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored as one or more instructions or code on a non- transitory computer-readable medium or non-transitory processor-readable medium.
  • the operations of a method or algorithm disclosed herein may be embodied in a processor-executable software module, which may reside on a non-transitory computer-readable or processor-readable storage medium.
  • Non-transitory computer- readable or processor-readable storage media may be any storage media that may be accessed by a computer or a processor.
  • non-transitory computer-readable or processor-readable media may include RAM, ROM, EEPROM, FLASH memory, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that may be used to store desired program code in the form of instructions or data structures and that may be accessed by a computer.
  • Disk and disc includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of non-transitory computer-readable and processor-readable media.
  • the operations of a method or algorithm may reside as one or any combination or set of codes and/or instructions on a non-transitory processor-readable medium and/or computer-readable medium, which may be incorporated into a computer program product.

Abstract

Conformément à des modes de réalisation, l'invention concerne des systèmes et des procédés pour gérer les performances d'une fonction de recherche de petite cellule durant une session de communication active par l'intermédiaire d'un premier abonnement dans un dispositif de communication à multiples abonnements à multiples veilles. Un processeur de dispositif peut réaliser un premier accord sur un second abonnement pour recevoir des informations de première petite cellule, et peut s'accorder en retour sur le premier abonnement après réception des informations de première petite cellule pour reprendre la session de communication active. Le processeur de dispositif peut réaliser un second accord sur le second abonnement pour recevoir des informations de seconde petite cellule, et peut s'accorder en retour sur le premier abonnement après réception des informations de seconde petite cellule pour reprendre la session de communication active. Le processeur de dispositif peut sélectionner l'une de la première petite cellule et de la seconde petite cellule pour une nouvelle sélection de cellule sur la base des informations de première petite cellule et des informations de seconde petite cellule.
PCT/US2016/033197 2015-06-30 2016-05-19 Gestion des performances d'une fonction de recherche de petite cellule dans un dispositif de communication à multiples abonnements à multiples veilles WO2017003575A1 (fr)

Applications Claiming Priority (4)

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IN3331/CHE/2015 2015-06-30
IN3331CH2015 2015-06-30
US14/814,553 2015-07-31
US14/814,553 US9642074B2 (en) 2015-01-30 2015-07-31 Managing performance of a small cell search function in a multi-subscription multi-standby communication device

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130295920A1 (en) * 2012-05-02 2013-11-07 Qualcomm Incorporated Apparatus and methods of limited tune away
US20130303181A1 (en) * 2012-05-11 2013-11-14 Qualcomm Incorporated Methods and apparatuses for data throughput optimization in dsds scenarios
US20150079988A1 (en) * 2013-09-19 2015-03-19 Qualcomm Incorporated Inter-rat and intra-rat small cell reselection
US20150099528A1 (en) * 2013-10-04 2015-04-09 Qualcomm Incorporated Enhanced system information decoding

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130295920A1 (en) * 2012-05-02 2013-11-07 Qualcomm Incorporated Apparatus and methods of limited tune away
US20130303181A1 (en) * 2012-05-11 2013-11-14 Qualcomm Incorporated Methods and apparatuses for data throughput optimization in dsds scenarios
US20150079988A1 (en) * 2013-09-19 2015-03-19 Qualcomm Incorporated Inter-rat and intra-rat small cell reselection
US20150099528A1 (en) * 2013-10-04 2015-04-09 Qualcomm Incorporated Enhanced system information decoding

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) procedures in idle mode (Release 12)", 3GPP STANDARD; 3GPP TS 36.304, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. V12.4.0, 23 March 2015 (2015-03-23), pages 1 - 38, XP050928020 *
ERICSSON: "Dual-SIM Dual-Standby UEs and their impact on the RAN", 3GPP DRAFT; R2-115375 DUAL-SIM DUAL-STANDBY UES AND THEIR IMPACT ON THE RAN, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Zhuhai; 20111010, 3 October 2011 (2011-10-03), XP050540879 *

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