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WO2013018037A1 - Procédés et appareil destinés à envoyer et à recevoir des messages de recherche - Google Patents

Procédés et appareil destinés à envoyer et à recevoir des messages de recherche Download PDF

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Publication number
WO2013018037A1
WO2013018037A1 PCT/IB2012/053924 IB2012053924W WO2013018037A1 WO 2013018037 A1 WO2013018037 A1 WO 2013018037A1 IB 2012053924 W IB2012053924 W IB 2012053924W WO 2013018037 A1 WO2013018037 A1 WO 2013018037A1
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WO
WIPO (PCT)
Prior art keywords
abs
mobile terminal
paging
subframe
icic
Prior art date
Application number
PCT/IB2012/053924
Other languages
English (en)
Inventor
Ville Vartiainen
Tero Henttonen
Samuli Turtinen
Timo Koskela
Sami-Jukka Hakola
Original Assignee
Renesas Mobile 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
Priority claimed from US13/197,642 external-priority patent/US8837362B2/en
Priority claimed from GB1113382.4A external-priority patent/GB2488848B/en
Application filed by Renesas Mobile Corporation filed Critical Renesas Mobile Corporation
Priority to DE112012003216.0T priority Critical patent/DE112012003216T5/de
Priority to CN201280038116.3A priority patent/CN103931257A/zh
Publication of WO2013018037A1 publication Critical patent/WO2013018037A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like

Definitions

  • the present invention relates to methods and apparatus for sending and receiving paging messages.
  • Embodiments of the present invention relate generally to paging of a mobile terminal and, in particular embodiments, to inter-cell interference coordination paging of a mobile terminal in an idle state.
  • a macro cell may find it to be difficult to reliably page the mobile terminal, such as for cell selection or cell reselection purposes.
  • the mobile terminal is not only within the coverage area of a macro cell, but is also within the coverage area of a closed subscriber group (CSG) cell, such as a femtocell, of which the mobile terminal is not a member, the CSG cell may create relatively strong interference for the mobile terminal, thereby leading to difficulties in the macro cell successfully paging the mobile terminal. These difficulties are particularly problematic in an instance in which the mobile terminal is in the idle mode.
  • CSG closed subscriber group
  • interference from a CSG cell may make it difficult to reliably have a successful cell search with regard to the primary and secondary synchronisation signals so as to permit a macro cell to initiate a cell selection or cell reselection process. Additionally, strong interference from a CSG cell may also reduce the reliability with which a mobile terminal may receive paging and system information blocks (SIBs) while located within the coverage area of a CSG cell.
  • SIBs system information blocks
  • ABS Almost blank subframes
  • the network is able to arrange occasions during which a mobile terminal is able to function despite being close to an interfering CSG cell
  • the paging configuration of the network may be established such that the paging occasion (PO) of the macro cell aligns with the ABSs of the CSG cell.
  • the paging occasion in subframe 9 may be utilised by the macro cell in an instance in which subframe 9 is also the ABS of the CSG cell.
  • a frame shift may be introduced between the CSG cell and the macro cell.
  • this network configuration may make it challenging to attain the peak paging capacity, such as four subframes for a radio frame. For example, in an instance in which a frame shift of 10 milliseconds is introduced between the CSG cell and the macro cell, this network configuration may allow only one paging occasion every 20 milliseconds.
  • Another technique that has been proposed to remedy the adverse effects of interference from a CSG cell in regards to the paging of a mobile terminal in the idle mode is to provide for cross-subframe assignments in which a physical downlink control channel (PDCCH) resource on one subframe assigns a physical downlink shared channel (PDSCH) resource on another subframe.
  • a mobile terminal that is experiencing interference from a CSG cell may receive a PDCCH in a subframe that is an ABS subframe of the CSG cell.
  • FDM frequency domain multiplexing
  • this approach may require changes to the radio access network so as to configure the cross-subframe related parameters and, in an instance in which the PDCCH reception occurs during a non-ABS subframe, to receive the PDCCH.
  • a method of causing a paging message to be provided to a mobile terminal comprising: causing an indication of an inter-cell interference coordination (ICIC) paging period to be provided to a mobile terminal in an idle state, wherein causing the indication of the ICIC paging period to be provided comprises providing an ICIC paging period Ticic and a number N ABS of consecutive almost blank subframes (ABS) subframes in which a paging message is to be expected; for a respective ICIC paging period, determining, via a processing system, the N ABS nearest ABS subframes of a closed subscriber (CSG) cell relative to a paging occasion (PO) subframe of a said mobile terminal; and causing a paging message to be provided to a said mobile terminal in one of the N ABS nearest ABS subframes of the CSG cell relative to the PO subframe of the mobile terminal.
  • ICIC inter-cell interference coordination
  • apparatus for causing a paging message to be provided to a mobile terminal, the apparatus comprising: a processing system constructed and arranged to cause the apparatus at least to: cause an indication of an inter-cell interference coordination (ICIC) paging period to be provided to a mobile terminal in an idle state, wherein causing the indication of the ICIC paging period to be provided comprises providing an ICIC paging period T ICIC and a number N ABS of consecutive almost blank subframes (ABS) subframes in which a paging message is to be expected; for a respective ICIC paging period, determine the N ABS nearest ABS subframes of a closed subscriber (CSG) cell relative to a paging occasion (PO) subframe of a said mobile terminal; and cause a paging message to be provided to a said mobile terminal in one of the N ABS nearest ABS subframes of the CSG cell relative to the PO subframe of the mobile terminal.
  • ICIC inter-cell interference coordination
  • a method of receiving a paging message comprising: receiving an indication of an inter-cell interference coordination (ICIC) paging period while a mobile terminal is in an idle state, wherein receiving the indication of the ICIC paging period comprises receiving an ICIC paging period Ticic and a number N ABS of consecutive almost blank subframes (ABS) subframes in which a paging message is to be expected; and receiving a paging message in one of the N ABS nearest ABS subframes of a closed subscriber (CSG) cell relative to a paging occasion (PO) subframe of the mobile terminal.
  • IIC inter-cell interference coordination
  • apparatus for receiving a paging message comprising: a processing system constructed and arranged to cause the apparatus at least to: receive an indication of an inter-cell interference coordination (ICIC) paging period while a mobile terminal is in an idle state, wherein receiving the indication of the ICIC paging period comprises receiving an ICIC paging period T ICIC and a number N ABS of consecutive almost blank subframes (ABS) subframes in which a paging message is to be expected; and, receive a paging message in one of the N ABS nearest ABS subframes of a closed subscriber (CSG) cell relative to a paging occasion (PO) subframe of the mobile terminal.
  • ICIC inter-cell interference coordination
  • a method and apparatus are therefore provided in accordance with certain embodiments for reliably paging a mobile terminal in the idle mode even in an instance in which the mobile terminal is subjected to interference from a CSG cell.
  • the mobile terminal of one example embodiment may reliably receive paging signals from a macro cell.
  • the mobile terminal of one example embodiment advantageously need not have advance knowledge of the ABS patterns of the CSG cell and FDM coordination need not be specified for the paging operations.
  • the processing system may comprise 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 to, with the at least one processor, cause the apparatus to operate as described above.
  • a computer program product includes at least one non-transitory computer-readable storage medium having computer-readable program instructions stored therein with the computer-readable program instructions including program instructions configured to cause an indication of an inter-cell interference coordination (ICIC) paging period to be provided to a mobile terminal in an idle state.
  • the program instructions configured to cause the indication of the ICIC paging period to be provided include program instructions configured to provide an ICIC paging period Ticic and a number N ABS of consecutive almost blank subframes (ABS) subframes in which a paging message is to be expected.
  • the computer-readable program instructions of this embodiment also include program instructions configured to determine, for a respective ICIC paging period, the N ABS nearest ABS subframes of a closed subscriber group (CSG) cell relative to a paging occasion (PO) subframe of the mobile terminal. Further, the computer-readable program instructions of this embodiment include program instructions configured to cause a paging message to be provided to the mobile terminal in one of the N ABS nearest ABS subframes of the CSG cell relative to the PO subframe of the mobile terminal.
  • an apparatus is provided that includes means for causing an indication of an inter-cell interference coordination (ICIC) paging period to be provided to a mobile terminal in an idle state.
  • ICIC inter-cell interference coordination
  • the means for causing the indication of the ICIC paging period to be provided includes means for providing an ICIC paging period Ticic and a number N ABS of consecutive almost blank subframes (ABS) subframes in which a paging message is to be expected.
  • the apparatus of this embodiment also includes means for determining, for a respective ICIC paging period, the N ABS nearest ABS subframes of a closed subscriber group (CSG) cell relative to a paging occasion (PO) subframe of the mobile terminal. Further, the apparatus of this embodiment includes means for causing a paging message to be provided to the mobile terminal in one of the N ABS nearest ABS subframes of the CSG cell relative to the PO subframe of the mobile terminal.
  • a computer program product includes at least one non-transitory computer-readable storage medium having computer-readable program instructions stored therein with the computer-readable program instructions including program instructions configured to cause an indication of an inter-cell interference coordination (ICIC) paging period to be received with a mobile terminal in an idle state.
  • the program instructions configured to cause the indication of the ICIC paging period to be received include program instructions configured to receive an ICIC paging period T ICIC and a number N ABS of consecutive almost blank subframes (ABS) subframes in which a paging message is to be expected.
  • the computer-readable program instructions of this embodiment also include program instructions configured to determine, for a respective ICIC paging period, the N ABS nearest ABS subframes of a closed subscriber group (CSG) cell relative to a paging occasion (PO) subframe of the mobile terminal. Further, the computer-readable program instructions of this embodiment include program instructions configured to receive a paging message in one of the N ABS nearest ABS subframes of the CSG cell relative to the PO subframe of the mobile terminal.
  • an apparatus includes means for receiving an indication of an inter-cell interference coordination (ICIC) paging period while a mobile terminal is in an idle state.
  • ICIC inter-cell interference coordination
  • the means for receiving the indication of the ICIC paging period includes means for receiving an ICIC paging period Ticic and a number N ABS of consecutive almost blank subframes (ABS) subframes in which a paging message is to be expected.
  • the apparatus of this embodiment also includes means for determining, for a respective ICIC paging period, the N ABS nearest ABS subframes of a closed subscriber group (CSG) cell relative to a paging occasion (PO) subframe of the mobile terminal. Further, the apparatus of this embodiment includes means for receiving a paging message in one of the N ABS nearest ABS subframes of the CSG cell relative to the PO subframe of the mobile terminal.
  • Figure 1 shows a schematic representation of a network in which example embodiments of the present invention may be implemented in order to reduce, if not eliminate, the deleterious effects of interference from a CSG cell upon paging of the mobile terminal by a macro cell;
  • Figure 2 shows a schematic block diagram of an example of an apparatus that may be embodied as a macro cell and/or a mobile terminal in accordance with embodiments of the present invention
  • Figure 3 shows a flowchart illustrating schematically an example of operations performed from the perspective of a macro cell in accordance with one embodiment of the present invention
  • Figure 4 shows a flowchart illustrating schematically an example of operations performed from the perspective of a mobile terminal in accordance with one embodiment of the present invention.
  • circuitry refers to all of the following: (a) hardware-only circuit implementations (such as implementations in only analog and/or digital circuitry) and (b) to combinations of circuits and software (and/or firmware), such as (as applicable): (i) to a combination of processor(s) or (ii) to portions ofprocessor(s)/software (including digital signal processor(s)), software, and memory(ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and (c) to circuits, such as a microprocessor(s) or a portion of a microprocessor(s), that require software or firmware for operation, even if the software or firmware is not physically present.
  • circuitry applies to all uses of this term in this specification, including in any claims.
  • circuitry would also cover an implementation of merely a processor (or multiple processors) or portion of a processor and its (or their) accompanying software and/or firmware.
  • circuitry would also cover, for example and if applicable to the particular claim element, a baseband integrated circuit or application specific integrated circuit for a mobile phone or a similar integrated circuit in server, a cellular network device, or other network device.
  • a method, apparatus and computer program product are disclosed for providing for more reliable network paging of a mobile terminal in an idle mode, such as in an instance in which the mobile terminal is experiencing interference from a CSG cell of which the mobile terminal is not a member.
  • the paging messages may be for various purposes, including for example the establishment of a connection between the network, such as a macrocell, and the mobile terminal.
  • Figure 1 includes a first communication device (e.g. mobile terminal 10) that is capable of communication via a macro cell 12, such as a base station, a Node B, an evolved Node B (eNB) or other access point, with a network 14 (e.g. a core network).
  • a first communication device e.g. mobile terminal 10
  • a macro cell 12 such as a base station, a Node B, an evolved Node B (eNB) or other access point
  • eNB evolved Node B
  • network 14 e.g. a core network
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • other networks may support the method, apparatus and computer program product of embodiments of the present invention, including those configured in accordance with wideband code division multiple access (W-CDMA), CDMA2000, global system for mobile communications (GSM), general packet radio service (GPRS) and/or the like.
  • W-CDMA wideband code division multiple access
  • CDMA2000 CDMA2000
  • GSM global system for mobile communications
  • GPRS general packet radio service
  • the network 14 may include a collection of various different nodes, devices or functions that may be in communication with each other via corresponding wired and/or wireless interfaces.
  • the network may include one or more macro cells 12, each of which may serve a coverage area divided into one or more cells.
  • the macro cell could be, for example, part of one or more cellular or mobile networks or public land mobile networks (PLMNs).
  • PLMNs public land mobile networks
  • other devices such as processing devices (e.g. personal computers, server computers or the like) may be coupled to the mobile terminal 10 and/or other communication devices via the network.
  • a communication device such as the mobile terminal 10 (also known as user equipment (UE)), may be in communication with other communication devices or other devices via the macro cell 12 and, in turn, the network 14.
  • UE user equipment
  • the communication device may include an antenna for transmitting signals to and for receiving signals from a macro cell.
  • the mobile terminal 10 may be a mobile communication device such as, for example, a mobile telephone, portable digital assistant (PDA), pager, laptop computer, or any of numerous other hand held or portable communication devices, computation devices, content generation devices, content consumption devices, or combinations thereof.
  • the mobile terminal 10 may include one or more processors that may define processing circuitry either alone or in combination with one or more memories.
  • the processing circuitry may utilise instructions stored in the memory to cause the mobile terminal 10 to operate in a particular way or execute specific functionality when the instructions are executed by the one or more processors.
  • the mobile terminal 10 may also include communication circuitry and corresponding hardware/software to enable communication with other devices and/or the network 14.
  • the mobile terminal 10 and/or the macro cell 12 may be embodied as or otherwise include an apparatus 20 as generically represented by the block diagram of Figure 2. While the apparatus 20 may be employed, for example, by a mobile terminal 10 or a macro cell 12, it should be noted that the components, devices or elements described below may not be mandatory and thus some may be omitted in certain embodiments. Additionally, some embodiments may include further or different components, devices or elements beyond those shown and described herein.
  • the apparatus 20 may include or otherwise be in communication with processing circuitry 22 that is configurable to perform actions in accordance with example embodiments described herein.
  • the processing circuitry may be configured to perform data processing, application execution and/or other processing and management services according to an example embodiment of the present invention.
  • the apparatus or the processing circuitry may be embodied as a chip or chip set.
  • the apparatus or the processing circuitry may comprise one or more physical packages (e.g. chips) including materials, components and/or wires on a structural assembly (e.g. a baseboard).
  • the structural assembly may provide physical strength, conservation of size, and/or limitation of electrical interaction for component circuitry included thereon.
  • the apparatus or the processing circuitry may therefore, in some cases, be configured to implement an embodiment of the present invention on a single chip or as a single "system-on-a-chip.”
  • a chip or chipset may constitute means for performing one or more operations for providing the functionalities described herein.
  • the processing circuitry 22 may include a processor 24 and memory 28 that may be in communication with or otherwise control a communication interface 26 and, in some cases, a user interface 30.
  • the processing circuitry may be embodied as a circuit chip (e.g. an integrated circuit chip) configured (e.g. with hardware, software or a combination of hardware and software) to perform operations described herein.
  • the processing circuitry may be embodied as a portion of a mobile computing device or other mobile terminal.
  • the user interface 30 may be in communication with the processing circuitry 22 to receive an indication of a user input at the user interface and/or to provide an audible, visual, mechanical or other output to the user.
  • the user interface may include, for example, a keyboard, a mouse, a joystick, a display, a touch screen, a microphone, a speaker, and/or other input/output mechanisms.
  • the apparatus 20 need not always include a user interface. For example, in instances in which the apparatus is embodied as a macro cell 12, the apparatus may not include a user interface. As such, the user interface is shown in dashed lines in Figure 2.
  • the communication interface 26 may include one or more interface mechanisms for enabling communication with other devices and/or networks.
  • the communication interface may be any means such as a device or circuitry embodied in either hardware, or a combination of hardware and software that is configured to receive and/or transmit data from/to a network 14 and/or any other device or module in communication with the processing circuitry 22, such as between the mobile terminal 10 and the macro cell 12.
  • the communication interface may include, for example, an antenna (or multiple antennas) and supporting hardware and/or software for enabling communications with a wireless communication network and/or a communication modem or other hardware/software for supporting communication via cable, digital subscriber line (DSL), universal serial bus (USB), Ethernet or other methods.
  • the memory 28 may include one or more non- transitory memory devices such as, for example, volatile and/or non- volatile memory that may be either fixed or removable.
  • the memory may be configured to store information, data, applications, instructions or the like for enabling the apparatus 20 to carry out various functions in accordance with example embodiments of the present invention.
  • the memory could be configured to buffer input data for processing by the processor 24.
  • the memory could be configured to store instructions for execution by the processor.
  • the memory may include one of a plurality of databases that may store a variety of files, contents or data sets.
  • applications may be stored for execution by the processor in order to carry out the functionality associated with each respective application.
  • the memory may be in communication with the processor via a bus for passing information among components of the apparatus.
  • the processor 24 may be embodied in a number of different ways.
  • the processor may be embodied as various processing means such as one or more of a microprocessor or other processing element, a coprocessor, a controller or various other computing or processing devices including integrated circuits such as, for example, an ASIC (application specific integrated circuit), an FPGA (field programmable gate array), or the like.
  • the processor may be configured to execute instructions stored in the memory 28 or otherwise accessible to the processor.
  • the processor may represent an entity (e.g. physically embodied in circuitry - in the form of processing circuitry 22) capable of performing operations according to embodiments of the present invention while configured accordingly.
  • the processor when the processor is embodied as an ASIC, FPGA or the like, the processor may be specifically configured hardware for conducting the operations described herein.
  • the processor when the processor is embodied as an executor of software instructions, the instructions may specifically configure the processor to perform the operations described herein.
  • FIGs 3 and 4 flowcharts illustrating the operations performed by examples of a method, apparatus and computer program product, such as apparatus 20 of Figure 2, from the perspective of a macro cell 12 and a mobile terminal 10 in accordance with one embodiment of the present invention are illustrated.
  • each block of the flowcharts, and combinations of blocks in the flowcharts may be implemented by various means, such as hardware, firmware, processor, circuitry and/or other device associated with execution of software including one or more computer program instructions.
  • one or more of the procedures described above may be embodied by computer program instructions.
  • the computer program instructions which embody the procedures described above may be stored by a memory device 28 of an apparatus employing an embodiment of the present invention and executed by a processor 24 in the apparatus.
  • any such computer program instructions may be loaded onto a computer or other programmable apparatus (e.g.
  • the computer program instructions may also be loaded onto a computer or other programmable apparatus to cause a series of operations to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide operations for implementing the functions specified in the flowcharts' block(s).
  • the operations of Figures 3 and 4 when executed, convert a computer or processing circuitry into a particular machine configured to perform an example embodiment of the present invention. Accordingly, the operations of each of Figures 3 and 4 define an algorithm for configuring a computer or processing circuitry 22, e.g. processor, to perform an example embodiment.
  • a general purpose computer may be provided with an instance of the processor which performs the algorithm of a respective one of Figures 3 and 4 to transform the general purpose computer into a particular machine configured to perform an example embodiment.
  • blocks of the flowcharts support combinations of means for performing the specified functions and combinations of operations for performing the specified functions. It will also be understood that one or more blocks of the flowchart, and combinations of blocks in the flowcharts, can be implemented by special purpose hardware-based computer systems which perform the specified functions, or combinations of special purpose hardware and computer instructions.
  • the macro cell 12 may be configured to page the mobile terminal 10, such as by issuing paging messages, while the mobile terminal is in the idle state, such as the RRC IDLE state in an LTE system.
  • the macro cell 12 may issue the paging messages for various purposes including for establishing a connection with the mobile terminal 10.
  • the mobile terminal 10 may be within the coverage area of not only the macro cell 12, but also the coverage area of a CSG cell 16, such as a femtocell, picocell, microcell or the like.
  • a CSG cell 16 maintains a listing of the mobile terminals that are authorised to access or otherwise utilise the CSG cell.
  • the mobile terminal 10 may not be approved or allowed to utilise the CSG cell 16 even though the mobile terminal is within the coverage area of the CSG cell. Nonetheless, as a result of being within the coverage area of the CSG cell 16, the mobile terminal 10 may experience interference from the CSG cell even though the mobile terminal is not a member of the CSG, with the interference from the CSG cell having the potential to prevent or hinder the reliable receipt of the paging messages from the macro cell 12.
  • the apparatus 20 embodied by the macro cell 12 may include means, such as the processing circuitry 22, processor 24, communication interface 26 or the like, for causing an indication of an inter-cell interference coordination (ICIC) paging period to be provided to the mobile terminal 10 while the mobile terminal is in an idle state.
  • IIC inter-cell interference coordination
  • the apparatus 20 embodied by the macro cell 12 may be configured such that all paging messages provide an indication of the ICIC paging period
  • the apparatus of one embodiment may initially issue a paging message in a conventional manner (since the macro cell generally does not know if the mobile terminal is experiencing interference from a CSG cell) and, in an instance in which the conventional paging message is not received and acted upon, may follow up by causing an indication of the ICIC paging period to be provided in accordance with embodiments of the present invention.
  • the indication of the ICIC paging period may be provided in various manners, such as via radio resource control (R C) signalling, e.g.
  • the indication of the ICIC paging period may include an ICIC paging period Ticic-
  • the ICIC paging period Ticic may be a multiple of the paging period T of the mobile terminal 10.
  • the ICIC paging period T ICIC may be less than, equal to or greater than the paging period T of the mobile terminal 10.
  • the ICIC paging period T ICIC may be provided directly to the mobile terminal 10 by providing the value of the ICIC paging period T ICIC -
  • the ICIC paging period T ICIC may be provided indirectly, for example with the apparatus 20 embodied by the macro cell 12 of one embodiment providing a multiplier nBicic with the product of the multiplier nBicic and the paging period T of the mobile terminal 10 defining the ICIC paging period T ICIC -
  • the multiplier nBicic may be less than, equal to or greater than one such that the ICIC paging period T ICIC may, in turn, also be less than, equal to or greater than the paging period T of the mobile terminal 10.
  • the indication of the ICIC paging period may also include the number N ABS of consecutive subframes of the CSG cell that have relatively low interference.
  • these subframes could be almost blank subframes (ABS) or other low interference subframes.
  • ABS subframes shall be used herein to refer not only to ABS subframes as defined by the LTE specification, but also other subframes that are configured to create low interference for the mobile terminal 10, such as less interference for the mobile terminal than is created by other subframes. See operation 40 of Figure 3.
  • the paging message provided by the macro cell 12 will be expected by the mobile terminal 10 within the ABS subframes.
  • the apparatus 20 once embodied by the macro cell 12 may also include means, such as the processing circuitry 22, the processor 24 or the like, for determining, for a respective ICIC paging period, the N ABS nearest ABS subframes of the CSG cell 16 relative to a paging occasion (PO) sub frame of the mobile terminal 10.
  • the mobile terminal 10 may have a PO subframe within the macro cell 12 which is derived from the macro cell- specific paging parameters and an identifier, such as the international mobile subscriber identity (IMSI), of the mobile terminal.
  • IMSI international mobile subscriber identity
  • the apparatus 20 embodied by the macro cell 12, such as the processing circuitry 22, the processor 24 or the like, may determine the N ABS subframes of the CSG cell 16 that are nearest to the PO subframe of the mobile terminal 10.
  • the N ABS nearest ABS subframes of the CSG cell 16 may be prior to the PO subframe of the mobile terminal 10 or subsequent to the PO subframe of the mobile terminal.
  • the N ABS nearest ABS subframes of the CSG cell 16 may sometimes, but not always, overlap the PO subframe of the mobile terminal 10.
  • the apparatus 20 embodied by the macro cell 12 may also include means, such as the processing circuitry 22, the processor 24, the communication interface 26 or the like, for causing a paging message to be provided to the mobile terminal 10 in one of the N ABS nearest ABS subframes of the CSG cell 16 relative to the PO subframe of the mobile terminal. See operation 44 of Figure 3.
  • the processing circuitry 22 the processor 24, the communication interface 26 or the like.
  • the interference that the paging message from the macro cell will experience may be reduced or eliminated, thereby increasing the reliability with which the mobile terminal 10 may receive the paging message and respond appropriately thereto.
  • the apparatus 20 embodied by the macro cell 12 may include means, such as the processing circuitry 22, the processor 24 or the like, for mapping the paging message including, for example, an identifier, such as a temporary mobile subscriber identity (TMSI), radio network temporary identifier (RNTI) or the like, of the mobile terminal to the PO subframe that overlaps with an ABS subframe of the CSG cell.
  • TMSI temporary mobile subscriber identity
  • RNTI radio network temporary identifier
  • the apparatus 20 embodied by the macro cell 12 may include means, such as the processing circuitry 22, the processor 24 or the like, for mapping the paging message including, for example, the TMSI or RNTI of the mobile terminal 10 to the ABS subframe of the CSG cell that is nearest to the PO subframe.
  • the ABS subframe of the CSG cell 16 that is nearest to the PO subframe into which the paging message including, for example, the TMSI or RNTI of the mobile terminal 10 is mapped may be either prior to or subsequent to the PO subframe.
  • the apparatus 20 embodied by the macro cell 12 of one embodiment may include means, such as the processing circuitry 22, the processor 24, the communication interface 26 or the like, for causing a paging message also to be provided in the PO subframe of the mobile terminal in an instance in which the N ABS nearest ABS subframes of the CSG cell do not overlap with the PO subframe of the mobile terminal.
  • the apparatus 20 embodied by the macro cell 12 may include means, such as the processing circuitry 22, the processor 24 or the like, for forming a CSG cell group including the plurality of CSG cells.
  • the apparatus 20 embodied by the macro cell 12 may include means, such as the processing circuitry 22, the processor 24 or the like, for determining which CSG cells of the CSG cell group have N ABS nearest ABS subframes that overlap with the PO subframe of the mobile terminal 10.
  • the apparatus 20 of the macro cell 12 may include means, such as the processing circuitry 22, the processor 24 or the like, for mapping the paging message to the PO subframe of the mobile terminal. Additionally or alternatively, for the CSG cells 16 that do not include N ABS nearest ABS subframes that overlap with the PO subframe of the mobile terminal 10, the apparatus 20 embodied by the macro cell 12 may include means, such as the processing circuitry 22, the processor 24 or the like, for determining the nearest ABS subframe of each respective CSG cell to the PO subframe of the mobile terminal.
  • the apparatus 20 embodied by the macro cell 12 may include means, such as the processing circuitry 22, the processor 24 or the like, for mapping the paging message to the ABS subframe of each respective CSG cell that is nearest to the PO subframe of the mobile terminal 10.
  • the apparatus 20 embodied by the macro cell 12 may include means, such as the processing circuitry 22, the processor 24 or the like, for mapping the paging message including, for example, the TMSI or RNTI of the mobile terminal to the ABS subframe selected from among the ABS subframes that overlap between the plurality of CSG cells that is nearest to the PO subframe of the mobile terminal.
  • the method and apparatus 20 of this embodiment may increase the likelihood that the mobile terminal 10 will receive the paging messages by causing the paging messages to be transmitted in an appropriate ABS subframe of each CSG cell 16 within the CSG cell group.
  • an apparatus 20 embodied by the mobile terminal may be provided that includes means, such as the processing circuitry 22, the processor 24, the communication interface 26 or the like, for receiving an indication of the ICIC paging period while the mobile terminal is in the idle state.
  • the indication of the ICIC paging period may be provided in various manners, such as via RRC signalling, e.g. an RRCConnectionRelease message, between the macro cell 12 and the mobile terminal 10 or via a broadcast message, such as within SIB2, e.g. within the radioResourceConfigCommon IE, or another SIB, from the macro cell that is received by the mobile terminal, as well as potentially other terminals.
  • the indication of the ICIC paging period may include an ICIC paging period Ticic and a number N ABS of consecutive ABS subframes in which a paging message is to be expected.
  • the apparatus 20 embodied by the mobile terminal 10, such as the processing circuitry 22, the processor 24, the communication interface 26 or the like, may receive the ICIC paging period T ICIC directly in the form of the value of the ICIC paging period or indirectly by receiving a multiplier nBicic of the paging period T of the mobile terminal.
  • the ICIC paging period T ICIC may be determined by the apparatus 20, such as by the processing circuitry 22, the processor 24 or the like, as the product of the multiplier in the paging period T of the mobile terminal 10.
  • the ICIC paging period T ICIC may be smaller than, equal to or greater than the paging period T of the mobile terminal 10. In the embodiment in which a multiplier nBicic is provided, the multiplier may therefore be less than, equal to or greater than one.
  • the apparatus 20 embodied by the mobile terminal 10 may include means, such as the processing circuitry 22, the processor 24 or the like, for determining, for a respective ICIC paging period, the N ABS nearest ABS subframes of the CSG cell 16 relative to the PO subframe of the mobile terminal. See operation 52 in Figure 4.
  • the apparatus 20 embodied by the mobile terminal 10 may also include means, such as the processing circuitry 22, the processor 24, the communication interface 26 or the like, for receiving a paging message from the macro cell 12 in one of the N ABS nearest ABS subframes of the CSG cell 16 relative to the PO subframe of the mobile terminal.
  • the paging message may include the TMSI or RNTI of the mobile terminal 10. See operation 54 of Figure 4.
  • the apparatus 20 embodied by the mobile terminal 10 may include means, such as processing circuitry 22, the processor 24, the communication interface 26 or the like, for receiving a paging message including, for example, the TMSI or RNTI of the mobile terminal in the PO subframe that overlaps with the ABS subframe of the CSG cell.
  • the apparatus 20 embodied by the mobile terminal may include means, such as the processing circuitry 22, the processor 24, the communication interface 26 or the like, for receiving the paging message including, for example, the TMSI or RNTI of a mobile terminal in the ABS subframe of the CSG cell that is nearest to the PO subframe.
  • the reliability with which the mobile terminal 10 receives the paging message may be increased even in an instance in which the mobile terminal suffers interference from the CSG cell.
  • the apparatus 20 embodied by the mobile terminal of one embodiment may include means, such as the processing circuitry 22, the processor 24, the communication interface 26 or the like, for also receiving the paging message in the PO subframe such that the mobile terminal of this embodiment receives the paging message in both the PO subframe and in the ABS subframe of the CSG cell that is nearest to the PO subframe.
  • the mobile terminal 10 is within the coverage area of a plurality of CSG cells 16 having different ABS patterns.
  • a CSG cell group may be defined to include the plurality of CSG cells 16 with different ABS patterns.
  • the apparatus 20 of the mobile terminal may include means, such as the processing circuitry 22, the processor 24, the communication interface 26 or the like, for receiving the paging message in the PO subframe of the mobile terminal.
  • the apparatus 20 embodied by the mobile terminal may include means, such as the processing circuitry 22, the processor 24, the communication interface 26 or the like, for receiving the paging message in the ABS subframe of each respective CSG cell that is nearest to the PO subframe of the mobile terminal.
  • the apparatus 20 embodied by the mobile terminal may include means, such as the processing circuitry 22, the processor 24, the communication interface 26 or the like, for receiving the paging message including, for example, the TMSI or RNTI of the mobile terminal in the ABS subframe selected from among the ABS subframes that overlap between the plurality of CSG cells that is nearest to the PO subframe of the mobile terminal.
  • a mobile terminal 10 in the idle mode may more reliably receive paging messages even while experiencing interference from one or more CSG cells 16, such as when the mobile terminal is within the coverage area of one or more CSG cells of which the mobile terminal is not a member.
  • the method and apparatus 20 of embodiments of the present invention permit the mobile terminal 10 to receive paging messages more reliably without requiring feedback from the mobile terminal and without requiring configuration rules for when the mobile terminal applies ICIC.
  • the mobile terminal 10 advantageously need not know the ABS pattern(s) of the CSG cell(s) 16 and there need not be FDM coordination for paging.

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

Abstract

L'invention concerne un procédé et un appareil qui permettent de rechercher sans erreurs un terminal mobile (10) en mode inactif, même si ledit terminal mobile (10) subit un brouillage provenant d'une cellule de groupe fermé d'abonnés (cellule CSG) (16). Une indication d'une période de recherche de coordination du brouillage intercellulaire (ICIC) est fournie au terminal mobile (10). Cette indication de la période de recherche d'ICIC comprend une période de recherche d'ICIC TICIC et un nombre NABS de secteurs de trame presque vides (secteurs de trame ABS) consécutifs où un message de recherche doit être attendu. Pour chaque période de recherche d'ICIC, les NABS secteurs de trame ABS qui correspondent à la cellule CSG (16) et qui sont les plus proches d'un secteur de trame occasion de recherche (PO) du terminal mobile (10) sont déterminés. Un message de recherche est également fourni au terminal mobile (10) dans l'un des NABS secteurs de trame ABS qui correspondent à la cellule CSG (16) et qui sont les plus proches.
PCT/IB2012/053924 2011-08-03 2012-08-01 Procédés et appareil destinés à envoyer et à recevoir des messages de recherche WO2013018037A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE112012003216.0T DE112012003216T5 (de) 2011-08-03 2012-08-01 Verfahren und Vorrichtung zum Senden und Empfangen von Pagingnachrichten
CN201280038116.3A CN103931257A (zh) 2011-08-03 2012-08-01 用于发送和接收寻呼消息的方法和装置

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US13/197,642 US8837362B2 (en) 2011-08-03 2011-08-03 Method and apparatus for inter-cell interference coordination paging of a mobile terminal in an idle state
GB1113382.4 2011-08-03
US13/197,642 2011-08-03
GB1113382.4A GB2488848B (en) 2011-08-03 2011-08-03 Methods and apparatus for sending and receiving paging messages

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CN105007603B (zh) * 2015-06-10 2017-06-27 西安交通大学 无定形小区中基于几乎空白子帧的动态时域干扰协调方法
CN106550434B (zh) * 2015-09-16 2019-06-14 北京展讯高科通信技术有限公司 移动终端及其检测寻呼消息的方法
CN109803373B (zh) * 2017-11-16 2021-01-22 电信科学技术研究院 一种寻呼机会的位置确定方法及通信设备

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CN102104965B (zh) * 2011-02-14 2017-05-03 中兴通讯股份有限公司 小区间干扰协调方法及装置、网络节点

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