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WO2018130270A1 - Prise en charge de technologie volte par ue prenant en charge l'amélioration de la couverture - Google Patents

Prise en charge de technologie volte par ue prenant en charge l'amélioration de la couverture Download PDF

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Publication number
WO2018130270A1
WO2018130270A1 PCT/EP2017/050417 EP2017050417W WO2018130270A1 WO 2018130270 A1 WO2018130270 A1 WO 2018130270A1 EP 2017050417 W EP2017050417 W EP 2017050417W WO 2018130270 A1 WO2018130270 A1 WO 2018130270A1
Authority
WO
WIPO (PCT)
Prior art keywords
coverage enhancement
terminal device
enhancement mode
requested service
service
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2017/050417
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English (en)
Inventor
Jussi-Pekka Koskinen
Subrata NATH
Bruno Landais
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Technologies Oy
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Nokia Technologies Oy
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Filing date
Publication date
Application filed by Nokia Technologies Oy filed Critical Nokia Technologies Oy
Priority to PCT/EP2017/050417 priority Critical patent/WO2018130270A1/fr
Publication of WO2018130270A1 publication Critical patent/WO2018130270A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/24—Accounting or billing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels

Definitions

  • the present invention relates to an apparatus, a method and a computer program product for handling support of certain services such as VoLTE by UEs supporting coverage enhancement.
  • Embodiments of the present invention relate to Enhanced Coverage.
  • Recently enhancements have been standardized in 3GPP Rel-13 to support UEs in Enhanced Coverage (see subclause 23.7b of 3GPP TS 36.300).
  • a UE supporting the enhanced coverage functionality is able to receive services from the network in poor radio coverage conditions (e.g. deep indoor, in basements, etc.).
  • Coverage enhancements can be supported by any category of UEs, e.g. Category M1 UEs with MTC applications, but also smartphones e.g. to enable the subscriber to still receive some services in bad radio conditions.
  • Two Enhanced Coverage (CE) modes (mode A, mode B) have been defined in Rel-13.
  • CE mode A is typically used in normal coverage conditions;
  • CE mode B is typically used in bad coverage conditions and relies on the UL and DL data transmission repetitions over the radio interface.
  • CE mode B results in increased latency to send signalling or data over the radio interface, and much lower throughput than permitted by a normal coverage.
  • the NAS timers at the UE and MME have been extended by 180 to 240 seconds for a UE supporting CE mode B. It is not possible in these conditions to support services with stringent QoS requirements, such as VoLTE (Voice over LTE), when the UE operates in CE mode B (too big latency for the call setup, too low throughout to deliver the voice packets).
  • VoLTE Voice over LTE
  • a UE indicating support of CE mode B cannot even support these services, such as VoLTE (Voice over LTE), when the UE operates in CE mode A, i.e. when it is in normal coverage.
  • Embodiments of the present invention address this situation and aim to overcome the above-described problem and to ensure that certain services, such as VoLTE, can be provided when a terminal device (UE) can operate in different coverage enhancement modes.
  • UE terminal device
  • an apparatus which comprises at least one processing circuitry, and at least one memory for storing instructions to be executed by the processing circuitry, wherein the at least one memory and the instructions are configured to, with the at least one processing circuitry, cause the apparatus at least: to receive a request for a service concerning a terminal device, to detect a current coverage enhancement mode of the terminal device, and to decide whether to allow or not to allow the requested service based on the detected coverage enhancement mode.
  • a method is provided which comprises:
  • the first aspect and the second aspect may be modified as follows:
  • a lower latency or a lower throughput than in the first coverage enhancement mode may be provided.
  • Information concerning the coverage enhancement mode the terminal is operating in currently may be received from a network control element to which the terminal device is connected, and the current coverage enhancement mode of the terminal device may be detected based on the received information.
  • the information may be included in a S1AP Initial UE message.
  • a request for a service to the terminal device may be received or a request for a service from the terminal device may be received, and the requested service may be not allowed in case it is decided based on the detected coverage enhancement mode that the requested service is not permitted, or the requested service may be allowed in case it is decided based on the detected coverage enhancement mode that the requested service is permitted.
  • the sender of the request for the service may be informed that the reason for not allowing the requested service is the current coverage enhancement mode of the terminal device.
  • a network control element to which the terminal device is connected may be disallowed to apply a coverage enhancement mode for the terminal device which is not compatible with the requested service.
  • the network control element may be disallowed to apply the coverage enhancement mode for the terminal device which is not compatible with the requested service in an S1AP Initial Context Setup or S1AP E-RAB Setup Request Message.
  • the network control element may be re-allowed to apply the coverage enhancement mode for the terminal device which is not compatible with the requested service after finishing the requested service.
  • the network control element may be re-allowed to apply the coverage enhancement mode for the terminal device which is not compatible with the requested service in a S1 AP E-RAB Release Command message.
  • a network control element may be instructed to page the terminal device according to a particular coverage enhancement mode in case the requested service is not permitted in a different coverage enhancement mode and the terminal device is in an idle state.
  • An indication comprising the instruction to page the terminal device according to a particular coverage enhancement mode may be included in a S1AP Paging message sent to the network control element in order to page the terminal device.
  • a request may be sent to a network control element to which the terminal device is connected with an indication to not allow the request if the terminal device is currently operating in a certain coverage enhancement mode, in case it is decided that the requested service is not permitted in that coverage enhancement mode.
  • the indication may be included in a S1AP E-RAB Setup or S1AP E-RAB Modify request sent to the network control element as part of the requested service establishment procedure.
  • the apparatus or method may to query the network control element to which the terminal device is connected to be reported the coverage enhancement mode the terminal device is currently operating in when it is determined that the requested service is not permitted in a certain coverage enhancement mode.
  • an apparatus which comprises at least one processing circuitry, and at least one memory for storing instructions to be executed by the processing circuitry, wherein the at least one memory and the instructions are configured to, with the at least one processing circuitry, cause the apparatus at least: to control a radio connection with a terminal device, to detect a coverage enhancement mode of the terminal device, and to send an indication of the detected coverage enhancement mode to a network management element.
  • a method which comprises:
  • the third aspect and the fourth aspect may be modified as follows:
  • the indication of the detected coverage enhancement mode may be sent receiving upon a request from the network management element to send the indication, or the indication of the detected coverage enhancement mode may be sent upon forwarding a UE request to the network management element.
  • the indication may be included in a S1AP Initial UE message.
  • An instruction may be received from the network management element which disallows applying a certain coverage enhancement mode for the terminal device during a duration of a requested service which is not compatible with the coverage enhancement mode, and it may be disallowed to use the certain coverage enhancement mode for the terminal device until instructed otherwise by the network management element.
  • An indication to disallow to apply the coverage enhancement mode may be included in an S1AP Initial Context Setup Message or S1AP E-RAB Setup Request.
  • An instruction may be received from the network management element which re-allows applying the certain coverage enhancement mode for the terminal device after finishing the requested service, and it may be re- allowed to use the certain coverage enhancement mode for the terminal device until instructed otherwise by the network management element.
  • An indication to re-allow to apply the coverage enhancement mode may be included in a S1AP E-RAB Release Command message.
  • the terminal device may be paged according to a particular coverage enhancement mode in case the requested service is not permitted in a different coverage enhancement mode and the terminal device is in an idle state in response to receiving an instruction from the network management element.
  • the request may not be allowed if the terminal device is currently using a particular coverage enhancement mode, in case it is decided that the requested service is not permitted in that coverage enhancement mode, in response to an instruction from the network management element.
  • the indication may be included in a S1AP E-RAB Setup or S1AP E-RAB Modify request received as part of the requested service establishment procedure.
  • the coverage enhancement mode the terminal device is currently operating in may be reported in response to a query of an instruction from the network management element.
  • an apparatus which comprises at least one processing circuitry, and at least one memory for storing instructions to be executed by the processing circuitry, wherein the at least one memory and the instructions are configured to, with the at least one processing circuitry, cause the apparatus at least: to prevent a terminal device from originating a certain service when operating in a certain coverage enhancement mode.
  • a method which comprises:
  • the fifth aspect and the sixth aspect may be modified as follows:
  • the terminal device may be prevented from originating the certain service by a configuration of t e terminal device or by network signalling, or by specifying and/or signalling to the terminal device that the terminal device camping on a cell in enhanced coverage shall not attempt connection establishment for the certain service.
  • an apparatus which comprises at least one processing circuitry, and at least one memory for storing instructions to be executed by the processing circuitry, wherein the at least one memory and the instructions are configured to, with the at least one processing circuitry, cause the apparatus at least: to refrain from originating a certain service when operating in a certain coverage enhancement mode.
  • a method which comprises:
  • the seventh aspect and the eighth aspect may be modified as follows:
  • a computer program product which comprises code means for performing a method according to the second aspect and/or fourth aspect and/or sixth aspect and/or eighth aspect and/or their modifications when run on a processing means or module.
  • the computer program product may be embodied on a computer-readable medium, and/or the computer program product may be directly loadable into the internal memory of the computer and/or transmittable via a network by means of at least one of upload, download and push procedures.
  • an apparatus which comprises
  • an apparatus which comprises
  • an apparatus which comprises
  • an apparatus which comprises
  • Fig. 1 illustrates an MME an eNB and a UE according to embodiments of the present invention
  • Fig.2 shows an MT VoLTE call establishment, for a UE in ECM idle state at the start of the call flow, according to an embodiment of the present invention
  • Fig. 3 shows a subsequent VoLTE call release, later on, after the call was successfully established, according to an embodiment of the present invention
  • Fig. 4 shows an MT VoLTE call establishment, for a UE in ECM connected state, at the start of the call flow, according to an embodiment of the present invention
  • Fig. 5 shows an alternative MT VoLTE call establishment, for a UE in ECM connected state, at the start of the call flow, according to an embodiment of the present invention.
  • a user using a UE supporting CE mode B should be able to get the full set of services it has subscribed to when in normal coverage, i.e. when the UE operates in CE mode A (Request 1 ).
  • the network e.g. MME
  • Requests 1 and 2 cannot be supported with the procedures currently specified in 3GPP as the MME only knows whether the UE supports CE mode B or not, but it does not know, for a UE supporting CE mode B, whether the UE is currently using CE mode A or CE mode B (the choice of the CE mode the UE operates in, in connected mode, is controlled/decided by the eNB). It is strongly desired to support the above requirements.
  • the MME cannot have a differentiated behaviour regarding the CE mode the UE is currently operating in. This may result in MME trying to establish EPS bearers in the RAN and UE when the UE operates in CE mode B and for services which cannot be supported in that mode of operation, e.g. VoLTE.
  • MME trying to setup or modify bearer towards the RAN and UE upon receiving a request from the PGW to establish or modify a dedicated bearer (e.g. for VoLTE), could result in inconsistent bearer states between the UE and the PGW if the UE happens to operate in CE mode B (e.g. bearer creation or bearer QoS change performed successfully but lately at the UE but corresponding procedure aborted at PGW earlier due to GTPtimers expiry). So this MME behaviour is much discouraged and not possible in practice.
  • 3GPP is specifying in 3GPP Release 14 Coverage Enhancement Authorization parameters, in the user subscription in the HSS, enabling or disabling the use of coverage enhancement (i.e. CE mode B).
  • CE mode B coverage enhancement
  • the MME can then signal to the UE in NAS procedures (e.g. Attach and TAU Accept) whether the use of coverage enhancements is authorized or not.
  • the MME will be enable to signal to the eNB, via S1AP signalling, whether the UE supports the capability to disable CE. See 3GPP TS 23.401 v14.2.0.
  • this feature does only allow to enable/disable the use of coverage enhancement, i.e. CE mode B, for the entire Tracking Areas list provided to the UE, based on (static) subscription information. If CE mode B is disallowed, the requirements identified earlier cannot be satisfied. If CE mode B is allowed, then the issues raised earlier are not solved either.
  • Embodiments of the present invention aim to overcome the problems described above.
  • a general overview of an embodiment of the present invention is described by referring to Fig. 1.
  • Fig. 1 shows a MME 1 as an example for a first apparatus according to the present embodiment, such as a network management element or an MME, and eNB 2 as an example for a second apparatus such as a network control element or eNB according to the present embodiment.
  • a MME 1 as an example for a first apparatus according to the present embodiment, such as a network management element or an MME
  • eNB 2 as an example for a second apparatus such as a network control element or eNB according to the present embodiment.
  • the MME 1 comprises a processor/controller 11 as an example for at least one processing circuitry and a memory 12 as an example for at least one memory for storing instructions to be executed by the processing circuitry.
  • the memory 12 and the instructions are configured to, with the processor 11, cause the MME 1 to receive a request for a service concerning a terminal device, to detect the current coverage enhancement mode of the terminal device (e.g., a UE), and to decide whether to allow or not (e.g., whether to reject) the requested service based on the detected coverage enhancement mode.
  • the terminal device e.g., a UE
  • the eNB 2 comprises a processor/ controller 21 as an example for at least one processing circuitry and a memory 22 as an example for at least one memory for storing instructions to be executed by the processing circuitry.
  • the memory 22 and the instructions are configured to, with the processor 21, cause the eNB 2 to control a radio connection with a terminal device (e.g., a UE), to detect the current coverage enhancement mode of the terminal device, and to send an indication of the detected coverage enhancement mode to a network management element (e.g., the MME 1 described above).
  • a terminal device e.g., a UE
  • a network management element e.g., the MME 1 described above.
  • the MME may decide based on the coverage enhancement mode in which the terminal is currently operating in (e.g., CE mode A or CE mode B as described above), whether a certain service is permitted or not (e.g. whether it needs to be rejected).
  • Information concerning the current coverage enhancement mode may be sent from the eNB 2 to the MME 1, for example.
  • the MME 1 as an example for another apparatus according to an embodiment, such as a network management element or an MME, may be configured as follows.
  • the memory 12 and the instructions are configured to, with the processor 11, cause the MME 1 to prevent a terminal device from originating a certain service (e.g., VoLTE call) when operating in a certain coverage enhancement mode (e.g., CE mode B).
  • a certain service e.g., VoLTE call
  • a certain coverage enhancement mode e.g., CE mode B
  • Fig. 1 shows a UE 3 as an example for a third apparatus according to the present embodiment, such as a terminal device or a UE.
  • the UE 3 comprises a processor/ controller 31 as an example for at least one processing circuitry and a memory 32 as an example for at least one memory for storing instructions to be executed by the processing circuitry.
  • the memory 32 and the instructions are configured to, with the processor 31 , cause the UE 3 to refrain from originating a certain service (e.g., VoLTE call) when operating in a certain coverage enhancement mode (e.g., CE mode B).
  • the MME 1, the eNB 2 and the UE 3 may further comprise input/output (I/O) units or functions (interfaces) 13, 23 or 33 connected to the processor 11, 21 or 31.
  • I/O input/output
  • the I/O units 13 and 23 may be used for performing communication between the eNB and the MME and may also be used for communicating with other entities or functions not shown in Fig. 1.
  • the I/O unit 23 of the eNB 2 may comprise a transmitter/receiver for radio communication between the eNB 2 and a terminal device (e.g., UE 3), and likewise the I/O unit 33 of the UE 3 may comprise a transmitter/receiver for radio communication between the UE 3 and a network control element (e.g., eNB 2).
  • the network shall be able to decide whether to establish or update a dedicated bearer (e.g. for a VoLTE call), for a UE supporting and authorized to use CE mode B, based on the current CE mode the UE is operating in.
  • a dedicated bearer e.g. for a VoLTE call
  • the network doesn't allow (e.g. rejects) the requests to establish or update dedicated bearers for services not compatible with CE mode B, e.g. VoLTE call, when the UE operates in CE mode B.
  • ECM idle state i.e. idle state from the MME perspective.
  • the MME identifies the requested service based on parameters such as APN, QCI, ARP, Paging and Service Information IE received in the Downlink Data Notification, Create Bearer Request, Update Bearer Request from the SGW, as per existing principles.
  • the MME determines, for a UE authorized to use coverage enhancements, whether the requested service is permitted or not in enhanced coverage, based on operator policies.
  • the MME may signal to the eNB that the UE shall not be paged in the enhanced coverage (alternatively the information may indicate that the UE shall be paged in normal coverage), e.g. when paging the UE for a VoLTE call. This can be done by adding a new indication in the S1AP Paging message. If so, t e eNB applies the paging behavior for normal coverage, e.g. it selects a number of paging repetitions such that the UE is able to receive the paging only in normal coverage.
  • the MME also applies its normal paging behaviour, e.g. number of paging repetitions for a UE in normal coverage, when paging the UE for a service not permitted to use enhanced coverage/ CE mode B.
  • the eNB shall report to the MME the CE mode (or CE level or repetitions) the UE is currently operating in, i.e. in the S1AP Initial UE Message. This allows the MME to determine, for a UE entering the connected state (i.e. when getting the paging response), whether the UE currently operates in CE mode A (i.e. normal coverage) or CE mode B (i.e. enhanced coverage).
  • the MME doesn't allow the requested service e.g. rejects the Downlink Data Notification preferentially with a new cause indicating that the service cannot be provided in the current UE coverage.
  • the procedure continues as per existing specifications and the requested service can be delivered to the user (e.g. establishment of a dedicated bearer for a VoLTE call).
  • the eNB updates the MME upon subsequent CE mode switch during the lifetime of the S1 signalling connection.
  • the MME shall be able to disallow the eNB to use the CE mode B for the UE, in the S1AP Initial Context Setup Request, e.g. when the MME establishes a VoLTE call, and this for the duration of the service (e.g. VoLTE call) that is not compatible with the use of CE mode B.
  • the MME shall be able to subsequently re-allow the eNB to use the CE mode B during the S1 connection lifetime, e.g. when releasing the VoLTE call. This can be done e.g. by defining a new indication in the S1 AP E-RAB Release Command message re-allowing the eNB to use CE mode B for this UE.
  • the MME may identify the requested service based on the RRC Establishment cause IE in the S1AP Initial UE Message (see subclause 9.2.1.3a of 3GPP TS 36.413). For instance, the UE can use the RRC establishment cause "mo-VoiceCall" for mobile originating MMTEL voice calls (see 3GPP TS 36.331 ) . Likewise, a UE trying to establish an eMPS MO call uses the RRC Establishment cause "highPriorityAccess" or emergency MO call uses the RRC Establishment cause "emergency”.
  • the MME doesn't allow the requested service e.g. rejects the UE NAS request immediately, e.g. a NAS Service Reject. If the MME cannot identify the requested service yet (e.g. the UE does not support the mo-VoiceCall RRC establishment cause), the MME proceeds with the NAS Request. The MME will then receive subsequently a Create Bearer Request from the PGW, e.g. for a VoLTE call, and the MME then proceeds as specified for MT services for a UE already in ECM connected state.
  • the MME determines, for a UE authorized to use CE mode B, whether the requested service is permitted or not in enhanced/ CE mode B coverage, based on operator policies, as per the principle a) described above.
  • the MME includes a new indication in the S1AP signalling sent to the eNB to establish or modify bearers, e.g. in the S1 AP E-RAB Setup Request or E-RAB MODI FY REQUEST message, that the eNB shall reject the S1AP request (and not send any embedded NAS PDU to the UE) if the UE is currently operating in CE mode B.
  • the eNB rejects the S1AP request if the UE is currently operating in CE mode B, preferably with a new cause indicating to the MME that the UE is operating in CE mode B.
  • the MME then doesn't allow the requested service e.g. rejects the Create Bearer Request or Update Bearer Request received from the PGW.
  • the MME queries the eNB to be reported the CE mode the UE is currently operating in, when determining that a requested service is not permitted to use CE mode B and the user has been authorized to use CE mode B, e.g.
  • the MME shall be able to disallow and re-allow the use of CE mode B during the lifetime of the S1 connection (e.g. when the MME establishes or releases the dedicated bearer for a VoLTE call).
  • MO services for a VoLTE call, the MME receives a GTP-C Create Bearer Request from the PGW. The same principles as for a UE in ECM connected state applies.
  • Fig.2 shows an MT VoLTE call establishment, for a UE in ECM idle state at the start of the call flow, in line with the principles a) to c) described above.
  • a service in connection with the UE is requested by sending a SIP INVITE from somewhere on the network (in this example IMS) on the user plane to the SGW, which forwards a DDN (Downlink Data Notification) to the MME in step 22.
  • the MME determines that the requested service is not permitted for CE mode B. Namely, as mentioned above, the requested service is a VoLTE call, and this cannot be supported in CE mode B due to higher latency and/or lower throughput.
  • the MME sends a paging instruction to the eNB including an indication that the service is only allowed in CE mode A (no extended coverage).
  • the eNB applies paging behavior for normal coverage.
  • the UE sends paging response to the eNB and sends RRC Connection Request. eNB then sends initial UE message to the MME. This message includes the current CE mode of the UE.
  • the MME rejects the requested service by sending a DDN failure indication to the SGW in step 27a.
  • the MME sends an initial context setup request including an indication to disable CE mode B for the duration of the VoLTE call to the eNB in step 27a'. That is, the MME disallows the eNB to use the CE mode B for the UE. Thus, from step 27b' onwards, the eNB does not use CE mode B.
  • the corresponding bearer is created, by sending a Create Bearer Request (via PCRF) from the IMS to the PGW to the SGW in step 27c', which forwards the Create Bearer Request to the MME in step 27d'.
  • a dedicated bearer establishment for the VoLTE call is carried out.
  • Fig.3 shows the subsequent VoLTE call release, later on, after the call was successfully established.
  • a Delete Bearer Request is sent (via PCRF) to the SGW, which forwards this request to the MME in step 32.
  • the MME sends an E-RAB Release command including an indication that the CE mode B is enabled to the eNB.
  • the dedicated bearer is released. Since the command sent in step 33 included the indication that the CE mode B is enabled again (i.e., that the use of the CE mode B is re-allowed), the eNB can use CE mode B again for this UE in step 35.
  • Fig. 4 shows an MT VoLTE call establishment, for a UE in ECM connected state, at the start of the call flow, according to the principle f).
  • the eNB can use CE mode B, as indicated in step 40.
  • a Create Bearer Request is sent (via PCRF) from the IMS via PGW to the SGW, which forwards it to the MME in step 42.
  • the MME determines that the requested service is not permitted for CE mode B.
  • the MME sends an E- RAB Setup Request with an indication that the CE mode B is disabled to the eNB.
  • the eNB When the UE operates in CE mode B, the eNB sends an E-RAB Setup response including an indication that the request is rejected and the UE operates in CE mode B to the MME in step 45. Following this, the MME sends a Create Bearer Response including an indication that the request is rejected and an indication (cause) that the UE operates in a coverage which is not compatible with the requested service to the network (SGW, PGW, IMS) in step 46.
  • SGW, PGW, IMS the network
  • the eNB When the UE operates in CE mode A, in which the requested service permitted, the eNB does not use CE mode B in step 46', and the dedicated bearer for the VoLTE call is established in 47'.
  • Fig. 5 shows an MT VoLTE call establishment, for a UE in ECM connected state, at the start of the call flow, according to the principle g).
  • Steps 50 to 53 are identical to steps 40 to 43 of Fig.4, so that a description thereof is not repeated.
  • the MME After the MME has determined that the requested service is not permitted for CE mode B, the MME sends a UE Radio Capability Match Request to the eNB, which includes an indication that the current CE mode should be reported.
  • the eNB replies with a UE Radio Capability Match Response, which includes an indication of the current CE mode.
  • the MME When the UE operates in CE mode B, the MME sends a Create Bearer Response including an indication that the request is rejected and an indication (cause) that the UE operates in a coverage which is not compatible with the requested service to the network (SGW, PGW, IMS) in step 56.
  • the MME When the UE operates in CE mode A, in which the requested service permitted, the MME sends an E-RAB Setup Request including an indication that the CE mode B is to be disabled to the eNB in step 56'. Thus, the eNB does not use CE mode B in step 57', and the dedicated bearer for the VoLTE call is established in 58'.
  • the MME is able to detect the current CE mode the UE is currently operating in and to decide, whether a certain requested service is permitted or not, based on the current CE mode.
  • the MME it is possible for the MME to individually decide for each requested service whether this service can be permitted or not, instead of rejecting the requested service in any case because the UE might be operating in an incompatible CE mode.
  • the MME was described as the entity which decides on permitting a requested service based on the current CE mode of t e UE.
  • another suitable entity may fulfill this functionality, e.g. the SMF in NextGen (or 5G) systems.
  • any method step is suitable to be implemented as software or by hardware without changing the idea of the invention in terms of the functionality implemented;
  • MOS Metal Oxide Semiconductor
  • CMOS Complementary MOS
  • BiMOS Bipolar MOS
  • BiCMOS Bipolar CMOS
  • ECL emitter Coupled Logic
  • TTL Transistor-Transistor Logic
  • ASIC Application Specific IC
  • FPGA Field-programmable Gate Arrays
  • CPLD Complex Programmable Logic Device
  • DSP Digital Signal Processor
  • - devices, units or means can be implemented as individual devices, units or means, but this does not exclude that they are implemented in a distributed fashion throughout the system, as long as the functionality of the device, unit or means is preserved;
  • an apparatus may be represented by a semiconductor chip, a chipset, or a (hardware) module comprising such chip or chipset; this, however, does not exclude the possibility that a functionality of an apparatus or module, instead of being hardware implemented, be implemented as software in a (software) module such as a computer program or a computer program product comprising executable software code portions for execution/being run on a processor;
  • a device may be regarded as an apparatus or as an assembly of more than one apparatus, whether functionally in cooperation with each other or functionally independently of each other but in a same device housing, for example.

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  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un appareil qui comprend au moins un circuit de traitement, et au moins une mémoire pour enregistrer des instructions devant être exécutées par le circuit de traitement, la ou les mémoires et les instructions étant conçues pour, avec le ou les circuits de traitement, amener l'appareil à au moins : recevoir une demande pour un service concernant un dispositif terminal, détecter un mode d'amélioration de couverture actuelle du dispositif terminal, et décider s'il faut autoriser ou non le service demandé sur la base du mode d'amélioration de couverture détecté. L'invention concerne également des procédés et des produits programmes d'ordinateur correspondants.
PCT/EP2017/050417 2017-01-10 2017-01-10 Prise en charge de technologie volte par ue prenant en charge l'amélioration de la couverture Ceased WO2018130270A1 (fr)

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PCT/EP2017/050417 WO2018130270A1 (fr) 2017-01-10 2017-01-10 Prise en charge de technologie volte par ue prenant en charge l'amélioration de la couverture

Applications Claiming Priority (1)

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PCT/EP2017/050417 WO2018130270A1 (fr) 2017-01-10 2017-01-10 Prise en charge de technologie volte par ue prenant en charge l'amélioration de la couverture

Publications (1)

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WO2018130270A1 true WO2018130270A1 (fr) 2018-07-19

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Cited By (1)

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WO2023060601A1 (fr) * 2021-10-15 2023-04-20 Nec Corporation Procédé, dispositif et support lisible par ordinateur destinés à des communications

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US20150223129A1 (en) * 2012-09-21 2015-08-06 Samsung Electronics Co., Ltd. Method for correctly establishing a local ip access service
WO2016190711A1 (fr) * 2015-05-27 2016-12-01 Samsung Electronics Co., Ltd. Procédé de gestion d'indication de niveau d'extension de couverture (ce)

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US20150223129A1 (en) * 2012-09-21 2015-08-06 Samsung Electronics Co., Ltd. Method for correctly establishing a local ip access service
WO2016190711A1 (fr) * 2015-05-27 2016-12-01 Samsung Electronics Co., Ltd. Procédé de gestion d'indication de niveau d'extension de couverture (ce)

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INTEL ET AL: "Restriction of use of Coverage Enhancement", vol. CT WG1, no. Spokane, WA (USA); 20170116 - 20170120, 9 January 2017 (2017-01-09), XP051201774, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ct/WG1_mm-cc-sm_ex-CN1/TSGC1_101bis_Spokane/docs/> [retrieved on 20170109] *
NOKIA: "CE Mode A/B with dedicated bearer establishment - network based solution", vol. SA WG2, no. Spokane, Wa; 20170116 - 20170120, 16 January 2017 (2017-01-16), XP051216483, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings_3GPP_SYNC/SA2/Docs/> [retrieved on 20170116] *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023060601A1 (fr) * 2021-10-15 2023-04-20 Nec Corporation Procédé, dispositif et support lisible par ordinateur destinés à des communications

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