WO2010059741A2 - Method and apparatus for determining drx cycle used for paging - Google Patents

Method and apparatus for determining drx cycle used for paging Download PDF

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Publication number
WO2010059741A2
WO2010059741A2 PCT/US2009/065010 US2009065010W WO2010059741A2 WO 2010059741 A2 WO2010059741 A2 WO 2010059741A2 US 2009065010 W US2009065010 W US 2009065010W WO 2010059741 A2 WO2010059741 A2 WO 2010059741A2
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WO
WIPO (PCT)
Prior art keywords
drx cycle
network
accepted
indication
cycle
Prior art date
Application number
PCT/US2009/065010
Other languages
English (en)
French (fr)
Other versions
WO2010059741A3 (en
Inventor
Masato Kitazoe
Osok Song
Nathan Edward Tenny
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
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to JP2011537588A priority Critical patent/JP5591817B2/ja
Priority to CN200980145789.7A priority patent/CN102217408B/zh
Priority to EP09756911A priority patent/EP2359652B1/en
Priority to ES09756911T priority patent/ES2402758T3/es
Priority to EP12193774.2A priority patent/EP2563089B1/en
Priority to KR1020117014159A priority patent/KR101272114B1/ko
Publication of WO2010059741A2 publication Critical patent/WO2010059741A2/en
Publication of WO2010059741A3 publication Critical patent/WO2010059741A3/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/12—Inter-network notification
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present disclosure relates generally to communication, and more specifically to techniques for determining a discontinuous reception (DRX) cycle to be used by a user equipment (UE) to receive paging
  • DRX discontinuous reception
  • a UE m a wireless communication network may operate in one of several modes, such as an idle mode or a connected mode, at any given moment
  • the UE may actively exchange data with one or more base stations, e g , for a voice call or a data call
  • the UE may power down much of the time to conserve battery power and may wake up periodically to monitor for paging messages applicable for the UE
  • the paging messages may alert the UE to the presence of incoming calls and/or may provide other information
  • the UE may periodically monitor for paging messages based on a DRX cycle
  • the DRX cycle may indicate when the UE should monitor for paging messages and when the UE may power down to save battery power If the DRX cycle is too long, then there may be long delays m sending paging messages to the UE Conversely, if the DRX cycle is too short, then the UE may monitor for paging messages too frequently and may consume too much battery power It may be desirable to determine an appropriate DRX cycle for the UE SUMMARY
  • the UE may have (i) a first DRX cycle used by a first network (e.g., a core network) to page the UE and (ii) a second DRX cycle used by a second network (e.g., a radio access network (RAN)) to page the UE.
  • the DRX cycle for each network may be determined based on the requirements of paging for that network.
  • the first DRX cycle may have a different (e.g., longer) duration/length than that of the second DRX cycle
  • the UE may use the longer DRX cycle and may ignore the shorter DRX cycle, when allowed, in order to extend battery life and/or obtain other benefits.
  • the UE may receive an indication of whether the second DRX cycle can be ignored or is to be considered by the UE. This indication may come from the first network or the second network.
  • the UE may use the longer DRX cycle if the second DRX cycle can be ignored by the UE and is shorter than the first DRX cycle.
  • the UE may receive paging from the first network and/or the second network based on the longer DRX cycle
  • the UE may negotiate a DRX cycle with a network (e.g., the core network) to ensure that both the UE and the network can support the DRX cycle and to avoid de-synchronization between the UE and the network.
  • a network e.g., the core network
  • the UE may send a proposed DRX cycle to the network and may receive an indication of whether the proposed DRX cycle is accepted or not accepted by the network.
  • the UE may also receive an accepted DRX cycle from the network, which may or may not match the proposed DRX cycle.
  • the UE may determine a DRX cycle to use to receive paging based on (i) the proposed DRX cycle if it is accepted by the network, (ii) the accepted DRX cycle if it is received from the network, or (iii) another DRX cycle for another network (e.g., the RAN) if the proposed DRX cycle is not accepted and the accepted DRX cycle is not received
  • FIG. 1 shows a wireless communication network.
  • FIG. 2 shows exemplary DRX cycles for a RAN and a core network for a UE.
  • FIGS. 3 A and 3B show two message flows for controlling whether the UE can ignore the DRX cycle from the RAN
  • FIGS 4A and 4B show two message flows for negotiating a DRX cycle.
  • FIG. 5 shows a process for receiving paging by the UE
  • FIG. 6 shows an apparatus for receiving paging by the UE.
  • FIG. 7 shows a process for supporting paging by a network.
  • FIG. 8 shows an apparatus for supporting paging by the network.
  • FIG. 9 shows a process for negotiating a DRX cycle.
  • FIG. 10 shows an apparatus for negotiating a DRX cycle.
  • FIG. 11 shows a block diagram of the UE and two network entities.
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal FDMA
  • SC-FDMA Single-Carrier FDMA
  • a CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc.
  • UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA.
  • cdma2000 covers IS-2000, IS-95 and IS-856 standards
  • GSM Global System for Mobile Communications
  • An OFDMA network may implement a radio technology such as Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802 11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM®, etc.
  • E-UTRA Evolved UTRA
  • UMB Ultra Mobile Broadband
  • Wi-Fi Wi-Fi
  • WiMAX IEEE 802.16
  • Flash-OFDM® Flash-OFDM®
  • UTRA and E-UTRA are part of Universal Mobile Telecommunication System (UMTS).
  • 3GPP Long Term Evolution (LTE) and LTE-Advanced (LTE-A) are new releases of UMTS that use E-UTRA.
  • UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP).
  • cdma2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2).
  • 3GPP2 3rd Generation Partnership Project 2
  • the techniques described herein may be used for the wireless networks and radio technologies mentioned above as well as other wireless networks and radio technologies
  • LTE Long Term Evolution
  • LTE terminology is used m much of the description below
  • FIG. 1 shows a wireless communication network 100, which may be an LTE network or some other wireless network
  • Wireless network 100 includes a RAN 120 and a core network (CN) 130
  • RAN 120 supports radio communication for UEs within its coverage area and may also be referred to as a Universal Terrestrial Radio Access Network (UTRAN) or an Evolved UTRAN (E-UTRAN).
  • UTRAN Universal Terrestrial Radio Access Network
  • E-UTRAN Evolved UTRAN
  • RAN 120 may include a number of evolved Node Bs (eNBs) and possibly other network entities
  • eNBs evolved Node Bs
  • Core network 130 may include various network entities described by 3GPP
  • MME mobility management entity
  • Serving gateway 132 may support data services such as packet data, Voice-over-Internet Protocol (VoIP), video, messaging, etc
  • MME 134 may be responsible for mobility management and path switching between eNBs at handover MME 134 may also perform paging for core network 130.
  • VoIP Voice-over-Internet Protocol
  • MME 134 may be responsible for mobility management and path switching between eNBs at handover MME 134 may also perform paging for core network 130.
  • FIG 1 shows some network entities that may be present in an LTE network
  • a UTRAN supporting WCDMA may include node Bs (instead of eNBs) coupled to Radio Network Controllers (RNCs)
  • RNCs Radio Network Controllers
  • a core network for UMTS may include Mobile Switching Centers (MSCs), Serving GPRS Support Nodes (GGSNs), and Gateway GPRS Support Nodes (GGSNs) (instead of serving gateways and MMEs).
  • MSCs Mobile Switching Centers
  • GGSNs Serving GPRS Support Nodes
  • GGSNs Gateway GPRS Support Nodes
  • a UE 110 may communicate with eNB 122 m RAN 130 and may also communicate with serving gateway 132 and MME 134 m core network 130.
  • UE 110 may communicate with network entities in RAN 120 via lower layer signaling and may communicate with network entities in core network 130 via upper layer signaling, e.g., Non Access Stratum (NAS) signaling in UMTS and LTE.
  • UE 110 may also be referred to as a mobile station, a terminal, an access terminal, a subsc ⁇ ber unit, a station, etc.
  • UE 110 may be a cellular phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, etc
  • UE 110 may indicate a paging DRX cycle to core network 130 via NAS signaling, e g , during an attach procedure or a tracking area update procedure
  • This paging DRX cycle may be referred to as a CN DRX cycle and may be specific to UE 110.
  • This mechanism may allow UE 110 to change the CN DRX cycle depending on a particular service being received by UE 110, a particular device type of UE 110, and/or other factors
  • Core network 130 may send paging messages to UE 110 in time intervals determined by the CN DRX cycle.
  • RAN 120 may also have a paging DRX cycle that may be applicable for all UEs within the coverage of RAN 120.
  • This paging DRX cycle may be referred to as a RAN DRX cycle
  • RAN 120 may broadcast parameters for the RAN DRX cycle in system information to the UEs RAN 120 may send paging messages to its UEs in time intervals determined by the RAN DRX cycle. These paging messages may alert the UEs to changes in system information and/or may be used for other purposes.
  • UE 110 may have a CN DRX cycle for core network 130 as well as a RAN DRX cycle for RAN 120
  • the CN DRX cycle may be the same as, or different from, the RAN DRX cycle
  • UE 110 may use the shorter of the CN DRX cycle and the RAN DRX cycle
  • the DRX cycle for each network e g , the RAN or the core network
  • the DRX cycle by UE 110 would ensure that the requirements of both RAN 120 and core network 130 can be satisfied.
  • the RAN DRX cycle may have a particular overall duration and a particular On duration, which may be defined by RAN 120.
  • UE 110 may listen for paging messages from RAN 120 during the On duration of the RAN DRX cycle
  • UE 110 may power down during the remaining duration of the RAN DRX cycle, if there are no other tasks to perform, in order to conserve battery power.
  • the CN DRX cycle may also have a particular overall duration and a particular On duration, which may be defined by UE 110 and provided to core network 130 UE 110 may listen for paging messages from core network 130 during the On duration of the CN DRX cycle UE 110 may power down dunng the remaining duration of the CN DRX cycle, if there are no other tasks to perform, m order to conserve battery power
  • the CN DRX cycle is four times longer than the RAN DRX cycle UE 110 may then use the shorter RAN DRX cycle instead of the longer CN DRX cycle, as shown in FIG 2, m order to satisfy the requirements of both RAN 120 and core network 130
  • a longer DRX cycle may be desirable for certain applications
  • UE 110 may be a sensor device that may very infrequently engage in machme-to- machine communication to exchange data with one or more other devices
  • the longer DRX cycle may allow UE 110 to sleep for a larger percentage of time, which may then extend battery life of UE 110
  • the longer DRX cycle may not be possible with the paging mechanism described above since the RAN DRX cycle is typically short (e g , on the order of seconds) m order to achieve a reasonable level of reliability for RAN purposes
  • the longer DRX cycle desired by UE 110 may be on the order of minutes, or hours, or even days
  • UE 110 may use the longer CN DRX cycle and may ignore the shorter RAN DRX cycle when applicable, as shown at the bottom of FIG 2
  • UE 110 may be able to implement a work around to achieve similar goal as the one achieved by the RAN DRX cycle
  • UE 110 may be able to extend battery life and/or obtain other benefits by using the longer CN DRX cycle and ignoring the shorter RAN DRX cycle
  • the RAN DRX cycle may be ignored if the consequences of doing it are known
  • the design of the network architecture by the network operator across RAN 120 and core network 130 may allow the RAN DRX cycle to be ignored without encountering adverse consequences
  • RAN 120 and core network 130 may independently handle their DRX cycles
  • Each network may assume that the reliability requirements of that network can be achieved with the DRX cycle for that network, regardless of the duration of the DRX cycle for the other network This independent operation may be true m many deployments of UMTS and LTE networks. In these cases, it may be desirable to control whether UE 110 can ignore the RAN DRX cycle
  • FIG. 3A shows a design of a message flow 300 for controlling whether UE 110 can ignore the RAN DRX cycle
  • UE 110 may send an Attach Request message to core network 130 for an attach procedure (step 1)
  • This message may include a CN DRX cycle proposed by UE 110.
  • Core network 130 may receive the Attach Request message from UE 110 and may determine that UE can ignore the RAN DRX cycle.
  • Core network 130 may then return an Attach Accept message to UE 110 (step 2)
  • This message may include an indication that UE can ignore the RAN DRX cycle.
  • the indication may be implemented with a flag that may be (i) present to indicate that UE 110 can ignore the RAN DRX cycle or (ii) omitted to indicate that UE 110 should consider the RAN DRX cycle
  • the indication may also be implemented with a parameter, a field, a bit, etc UE 110 may receive the Attach Accept message and extract the indication UE 110 may use the proposed CN DRX cycle and may ignore the RAN DRX cycle based on the received indication (step 3)
  • FIG. 3B shows a design of a message flow 310 for controlling whether UE 110 can ignore the RAN DRX cycle
  • UE 110 may send an Attach Request message with a proposed CN DRX cycle to core network 130 (step 1)
  • Core network 130 may receive the Attach Request message and may determine that UE 110 should not ignore the RAN DRX cycle
  • Core network 130 may then return an Attach Accept message with an indication that UE 110 should not ignore the RAN DRX cycle (e g., with no flag)
  • UE 110 may receive the Attach Accept message and obtain the indication UE 110 may then consider both the RAN DRX cycle and the proposed CN DRX cycle to determine which DRX cycle to use to receive paging (step 3).
  • FIGS 3A and 3B show a design in which core network 130 can return an indication of whether or not UE 110 can ignore the RAN DRX cycle m the Attach Accept message.
  • Core network 130 may also send this indication m other messages, e g , in NAS messages used for the tracking area update procedure and/or other procedures
  • FIGS 3 A and 3B show a design m which core network 130 can control whether or not UE 110 can ignore the RAN DRX cycle.
  • Core network 130 typically has knowledge of the RAN DRX cycle and may be able to determine whether or not the RAN DRX cycle can be ignored
  • Core network 130 may send an indication (e g , a flag) for this purpose UE 110 may determine that it can ignore the RAN DRX cycle only if allowed by the indication (e g , a flag) from core network 130
  • UE 110 may determine that it should not ignore the RAN DRX cycle if this is conveyed by the indication (e g , no flag) from core network 130
  • Legacy core networks may not support the indication and may return the Attach Accept message without this indication
  • These legacy core networks can implicitly disallow UEs from ignoring the RAN DRX cycle by omitting the indication in the Attach Accept messages
  • RAN 120 may control whether or not UE 110 can ignore the RAN DRX cycle UE 110 may send a message with a request to ignore the RAN DRX cycle RAN 120 may determine whether or not UE 110 can ignore the RAN DRX cycle RAN 120 may autonomously make this determination or may communicate with core network 130 to make this determination In any case, RAN 120 may send an indication to UE 110 to indicate whether or not UE 110 can ignore the RAN DRX cycle UE 110 may either consider or ignore the RAN DRX cycle based on the indication received from RAN 120
  • UE 110 may determine whether or not it can ignore the RAN DRX cycle UE 110 may be preconf ⁇ gured (e g , during a provisioning phase) with an indication of whether or not UE 110 can ignore the RAN DRX cycle UE 110 may also be dynamically configured (e g , via over-the-air signaling) with an indication of whether or not UE 110 can ignore the RAN DRX cycle In any case, UE 110 may either consider or ignore the RAN DRX cycle based on the indication configured on UE 110
  • Legacy core networks may support an old protocol version, which may support a first set of values for the CN DRX cycle
  • Newer core networks may support a new protocol version, which may support a second set of values for the CN DRX cycle
  • the second set may include one or more larger/extended values that may not be included m the first set
  • UE 110 may support the new protocol version and may not know if core network 130 supports the extended values for the CN DRX cycle UE 110 may propose an extended CN DRX cycle without knowing whether or not core network 130 supports the extended CN DRX cycle De-synchromzation between UE 110 and core network 130 may occur if UE 110 uses the extended CN DRX cycle and core network 130 does not support it
  • UE 110 may negotiate the CN DRX cycle with core network 130 to ensure that both UE 110 and core network 130 can support the CN DRX cycle This may avoid de -synchronization between UE 110 and core network 130 [0042] FIG.
  • FIG. 4A shows a design of a message flow 400 for negotiating the CN DRX cycle
  • UE 110 may send an Attach Request message with a proposed CN DRX cycle to core network 130 (step 1)
  • Core network 130 may receive the Attach Request message and may accept the proposed CN DRX cycle from UE 110 Alternatively, core network 130 may select a CN DRX cycle for UE 110, which may be different from the proposed CN DRX cycle In any case, core network 130 may return an Attach Accept message with an "accepted” indication or an accepted CN DRX cycle (step 2)
  • the "accepted" indication may indicate that the proposed CN DRX cycle from UE 110 has been accepted
  • the accepted CN DRX cycle may be equal to the proposed CN DRX cycle from UE 110 or the selected CN DRX cycle from core network 130
  • UE 110 may receive the Attach Accept message and obtain the "accepted” indication or the accepted CN DRX cycle
  • UE 110 may consider the proposed CN DRX
  • FIG. 4B shows a design of a message flow 410 for negotiating the CN DRX cycle UE 110 may send an Attach Request message with a proposed CN DRX cycle to core network 130 (step 1)
  • Core network 130 may receive the Attach Request message and may not accept the proposed CN DRX cycle from UE 110 or may not recognize the value of the proposed CN DRX cycle, which may be an extended value not supported by core network 130
  • Core network 130 may then return an Attach Accept message with a "not accepted” indication or no feedback (step 2)
  • the "not accepted" indication or no feedback may indicate that (i) the proposed CN DRX cycle from UE 110 is recognized by core network 130 but is not accepted or (n) the proposed CN DRX cycle from UE 110 is not recognized by core network 130 and hence not accepted UE 110 may receive the Attach Accept message and obtain the "not accepted” indication or no feedback UE 110 may then consider the proposed CN DRX cycle as being invalid and may use the RAN DRX cycle (step 3)
  • FIGS 4A and 4B show a design in which core network 130 can return an indication of whether or not the proposed CN DRX cycle has been accepted in the Attach Accept message
  • Core network 130 may also send this indication in other messages, e g , in NAS messages used for the tracking area update procedure and/or other procedures
  • FIGS 4A and 4B show a design m which core network 130 can provide feedback on whether or not the proposed CN DRX cycle from UE 110 has been accepted by core network 130
  • This ability to send feedback may be supported by core network 130 with the new protocol version
  • the feedback may be given in various forms
  • the feedback may comprise a binary indication of either "accepted” or "not accepted” for the proposed CN DRX cycle UE 110 may select and send another proposed CN DRX cycle if the "not accepted" indication is received from core network 130
  • the feedback may comprise an accepted CN DRX cycle that core network 130 can accept/use UE 110 may then use the accepted CN DRX cycle or may send another proposed CN DRX cycle
  • there may be no feedback from core network 130 if the proposed CN DRX cycle is not accepted or is not recognized by core network 130 UE 110 may then use the RAN DRX cycle or may send another proposed CN DRX cycle
  • the feedback may also comprise other information
  • the UE may determine a first DRX cycle used by a first network to page the UE (block 512)
  • the UE may also determine a second DRX cycle used by a second network to page the UE (block 514)
  • the first network may be a core network
  • the second network may be a RAN
  • the first DRX cycle may be a CN DRX cycle
  • the second DRX cycle may be a RAN DRX cycle
  • the first and second networks may also be two RANs, two core networks, or any two networks of the same or different types
  • the first DRX cycle may be used by the first network specifically for the UE
  • the second DRX cycle may be used by the second network for all UEs withm the coverage of the second network
  • each DRX cycle may be specific for the UE or general for a group of UEs
  • the UE may determine whether the first DRX cycle or the second DRX cycle is a longer DRX cycle (block 516)
  • the UE may receive paging from the first network and/or the second network based on the longer DRX cycle (block 518)
  • the UE may receive an indication of whether the second DRX cycle can be ignored or is to be considered by the UE This indication may come from the first network or the second network
  • the UE may use the longer DRX cycle if the second DRX cycle can be ignored by the UE and is shorter than the first DRX cycle
  • the UE may use the second DRX cycle, instead of the longer DRX cycle, if the second DRX cycle is to be considered by the UE and is shorter than the first DRX cycle
  • the UE may send a first message comprising a proposed DRX cycle to the first network
  • the UE may receive a second message from the first network in response to the first message
  • the second message may include (i) an explicit indication (e e
  • FIG. 6 shows a design of an apparatus 600 for receiving paging Apparatus 600 includes a module 612 to determine a first DRX cycle used by a first network to page a UE, a module 614 to determine a second DRX cycle used by a second network to page the UE, a module 616 to determine whether the first DRX cycle or the second DRX cycle is a longer DRX cycle, and a module 618 to receive paging from the first network and/or the second network based on the longer DRX cycle [0051] FIG.
  • a first message may be received from a UE having (i) a first DRX cycle used by a first network to page the UE and (n) a second DRX cycle used by a second network to page the UE (block 712)
  • the first network may be a core network
  • the second network may be a RAN
  • the first and second networks may also be any two networks
  • An indication of whether the second DRX cycle can be ignored or is to be considered by the UE may be determined (block 714)
  • a second message comprising the indication may be sent to the UE (block 716)
  • the UE may determine a DRX cycle to use to receive paging based on the indication
  • process 700 may be performed by the first network, which may receive the first message from the UE and may send the second message to the UE
  • Process 700 may also be performed by the second network or some other entity
  • FIG. 8 shows a design of an apparatus 800 for supporting paging by a network
  • Apparatus 800 includes a module 812 to receive a first message from a UE, with the UE having a first DRX cycle used by a first network to page the UE and a second DRX cycle used by a second network to page the UE, a module 814 to determine an indication of whether the second DRX cycle can be ignored or is to be considered by the UE, and a module 816 to send a second message comprising the indication to the UE
  • FIG. 9 shows a design of a process 900 for negotiating a DRX cycle
  • a UE may send a proposed DRX cycle to a first network (block 912)
  • the UE may receive an indication of whether the proposed DRX cycle is accepted or not accepted by the first network (block 914)
  • the UE may determine a DRX cycle to use to receive paging based on the indication (block 916)
  • the UE may receive no feedback from the first network for the proposed DRX cycle
  • the no feedback may be considered as an implicit indication that the proposed DRX cycle is not accepted by the first network
  • the UE may also receive an accepted DRX cycle from the first network
  • the accepted DRX cycle may be considered as an implicit indication that the proposed DRX cycle (i) is accepted if it matches the accepted DRX cycle or (ii) is not accepted if it is different from the accepted DRX cycle
  • the UE may also determine a second DRX cycle used by a second network to page the UE
  • the UE may determine the DRX cycle to use based further on the second DRX cycle
  • the first network may be a core network
  • the second network may be a RAN
  • the first and second networks may also be any two networks
  • the DRX cycle to be used by the UE may be determined based on the proposed DRX cycle if it is accepted by the first network.
  • the DRX cycle to be used by the UE may be the second DRX cycle if the proposed DRX cycle is not accepted by the first network.
  • the DRX cycle to be used by the UE may also be determined based on the accepted DRX cycle if it is received from the first network.
  • FIG. 10 shows a design of an apparatus 1000 for negotiating a DRX cycle.
  • Apparatus 1000 includes a module 1012 to send a proposed DRX cycle from a UE to a first network, a module 1014 to receive an indication of whether the proposed DRX cycle is accepted or not accepted by the first network, and a module 1016 to determine a DRX cycle to be used by the UE to receive paging based on the indication.
  • the modules in FIGS. 6, 8 and 10 may comprise processors, electronics devices, hardware devices, electronics components, logical circuits, memories, software codes, firmware codes, etc., or any combination thereof.
  • FIG. 11 shows a block diagram of a design of UE 110, eNB 122 in RAN 120, and MME 134 m core network 130 in FIG. 1.
  • an encoder 1112 may receive traffic data and signaling messages to be sent on the uplink.
  • Encoder 1112 may process (e.g., format, encode, and interleave) the traffic data and signaling messages.
  • a modulator (Mod) 1 114 may further process (e.g., symbol map and modulate) the encoded traffic data and signaling messages and provide output samples.
  • a transmitter (TMTR) 1122 may condition (e.g., convert to analog, filter, amplify, and frequency upconvert) the output samples and generate an uplink signal, which may be transmitted via an antenna 1124 to eNB 122.
  • antenna 1124 may receive a downlink signal transmitted by eNB 122.
  • a receiver (RCVR) 1126 may condition (e.g , filter, amplify, frequency downconvert, and digitize) the received signal from antenna 1124 and provide input samples.
  • a demodulator (Demod) 1116 may process (e.g., demodulate) the input samples and provide symbol estimates.
  • a decoder 1118 may process (e.g., demterleave and decode) the symbol estimates and provide decoded data and signaling messages sent to UE 110.
  • Encoder 1112, modulator 1114, demodulator 1116, and decoder 1118 may be implemented by a modem processor 1110.
  • a controller/processor 1130 may direct the operation at UE 110 Controller/ processor 1130 may also perform or direct process 500 in FIG. 5, process 900 in FIG. 9, and/or other processes for the techniques described herein Controller/processor 1130 may also perform or direct the processing by UE 110 in FIGS 3 A, 3B, 4A and 4B
  • Memory 1132 may store program codes and data for UE 110
  • a transmitter/receiver 1138 may support radio communication with UE 110 and other UEs.
  • a controller/processor 1140 may perform various functions for communication with the UEs.
  • the uplink signal from UE 110 may be received via an antenna 1136, conditioned by receiver 1138, and further processed by controller/processor 1140 to recover the traffic data and signaling messages sent by UE 110.
  • traffic data and signaling messages may be processed by controller/processor 1140 and conditioned by transmitter 1138 to generate a downlink signal, which may be transmitted via antenna 1136 to UE 110 and other UEs Controller/processor 1140 may also perform or direct process 700 in FIG 7 and/or other processes for the techniques described herein
  • Memory 1142 may store program codes and data for eNB 122.
  • a communication (Comm) unit 1144 may support communication with other network entities.
  • a controller/processor 1150 may perform va ⁇ ous functions to support communication services for UEs. Controller/processor 1150 may also perform or direct process 700 in FIG 7 and/or other processes for the techniques described herein Controller/processor 1150 may also perform or direct the processing by core network 130 in FIGS. 3A, 3B, 4A and 4B Memory 1152 may store program codes and data for MME 134 A communication unit 1154 may support communication with other network entities
  • FIG. 11 shows simplified designs of UE 110, eNB 122, and MME 134.
  • each entity may include any number of transmitters, receivers, processors, controllers, memories, communication units, etc
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • 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 computing 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
  • the steps of a method or algorithm described in connection with the disclosure herein may be embodied directly in hardware, in a software module executed by a processor, or m a combination of the two.
  • a software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium.
  • the storage medium may be integral to the processor.
  • the processor and the storage medium may reside in an ASIC.
  • the ASIC may reside in a user terminal
  • the processor and the storage medium may reside as discrete components in a user terminal
  • the functions described may be implemented in hardware, software, firmware, or any combination thereof If implemented m software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another
  • a storage media may be any available media that can be accessed by a general purpose or special purpose computer.
  • such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code means m the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
  • any connection is properly termed a computer-readable medium
  • the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave
  • the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium.
  • 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 should also be included within the scope of computer- readable media.

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PCT/US2009/065010 2008-11-18 2009-11-18 Method and apparatus for determining drx cycle used for paging WO2010059741A2 (en)

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JP2011537588A JP5591817B2 (ja) 2008-11-18 2009-11-18 ページングに使用されるｄｒｘサイクルを判断するための方法および装置
CN200980145789.7A CN102217408B (zh) 2008-11-18 2009-11-18 确定用于寻呼的drx周期的方法和装置
EP09756911A EP2359652B1 (en) 2008-11-18 2009-11-18 Method and apparatus for determining drx cycle used for paging
ES09756911T ES2402758T3 (es) 2008-11-18 2009-11-18 Procedimiento y aparato para determinar ciclos DRX utilizados en la radiolocalización
EP12193774.2A EP2563089B1 (en) 2008-11-18 2009-11-18 Method and apparatus for determining drx cycle used for paging
KR1020117014159A KR101272114B1 (ko) 2008-11-18 2009-11-18 페이징을 위해 사용되는 ｄｒｘ 사이클을 결정하기 위한 방법 및 장치

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US8971933B2 (en) 2015-03-03
JP5591817B2 (ja) 2014-09-17
CN102217408B (zh) 2014-07-02
US20100130237A1 (en) 2010-05-27
CN102217408A (zh) 2011-10-12
WO2010059741A3 (en) 2010-07-29
KR101272114B1 (ko) 2013-06-10
EP2359652A2 (en) 2011-08-24
JP2014222883A (ja) 2014-11-27
JP5844419B2 (ja) 2016-01-13
KR20110086755A (ko) 2011-07-29
EP2563089B1 (en) 2020-03-11
ES2402758T3 (es) 2013-05-08
EP2563089A1 (en) 2013-02-27
JP2012509649A (ja) 2012-04-19

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