WO2020248752A1 - Mise à disposition de services dans un réseau lte/5g par un dispositif utilisateur sur la base d'une combinaison plmn/canal - Google Patents

Mise à disposition de services dans un réseau lte/5g par un dispositif utilisateur sur la base d'une combinaison plmn/canal Download PDF

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Publication number
WO2020248752A1
WO2020248752A1 PCT/CN2020/089667 CN2020089667W WO2020248752A1 WO 2020248752 A1 WO2020248752 A1 WO 2020248752A1 CN 2020089667 W CN2020089667 W CN 2020089667W WO 2020248752 A1 WO2020248752 A1 WO 2020248752A1
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WO
WIPO (PCT)
Prior art keywords
user device
network
radio access
plmn
access technology
Prior art date
Application number
PCT/CN2020/089667
Other languages
English (en)
Inventor
Satyaprakash PANDEY
Rahul Sinha
Original Assignee
Guangdong Oppo Mobile Telecommunications Corp., Ltd.
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 Guangdong Oppo Mobile Telecommunications Corp., Ltd. filed Critical Guangdong Oppo Mobile Telecommunications Corp., Ltd.
Priority to CN202080032982.6A priority Critical patent/CN113785620B/zh
Publication of WO2020248752A1 publication Critical patent/WO2020248752A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • the present invention generally relates to wireless communications, and more particularly to system and method for availing services in a LTE/5G networks by a user device (supporting multiple RATs) based on a PLMN/channel combination while utilizing available wireless channels.
  • LTE long term evolution
  • 5G long term evolution
  • 4G 4G
  • 3G 3G
  • 2G various operators
  • various operators are operating on more than one band/channel of the LTE networks.
  • VoIP voice over LTE
  • CSFB circuit switch fall back
  • a user device may be one of a voice centric device and a data centric device.
  • the user device in CS/PS mode 1 tries to latch to the LTE network with an EPS attach type as ‘combined EPS/IMSI’ indicating that the user device supports EPS services as well as non-EPS services.
  • the user device may not be able to latch to the LTE network since the LTE network does not allow non-EPS services.
  • the user device selects a serving cell of a network by selecting a combination of PLMN and RAT for the network i.e. the user device selects both the PLMN and the RAT supported by the user device and the network.
  • a Universal Subscriber Identity Module (USIM) card of the user device includes various data files as per the 3GPP (Third Generation Partnership Project) standards, where said data files define a PLMN/RAT (s) combination where multiple RATs are specified for the listed PLMN. For a successful selection of the serving cell, the PLMN/RAT combination is selected based on a priority order.
  • 3GPP Third Generation Partnership Project
  • the user device for a particular PLMN/RAT combination, transmits an attach request to the network.
  • the user device receives the accept message from the network but it includes certain causes which prohibits the user device to stay in that particular network.
  • the user device disables higher RAT capability altogether for that PLMN notwithstanding that the PLMN might be operating on some different frequency as well.
  • the user device disables the current/existing RAT (for e.g. E-UTRAN capability) by selecting another lower capability RAT for a PLMN among a list of equivalent PLMNs.
  • the user experience highly degrades in current solutions of disabling the higher RATs.
  • the user device in the current solutions of switching to lower RATs from the higher RATS, the user device thereafter, may get stuck on the lower RAT only and may not again switch to higher RAT smoothly, thereby limiting the functionality of the user device.
  • Another limitation of the current solutions is ping pong of the user device between the LTE network and a non-LTE network which in turn effects the connectivity services.
  • the existing solutions are unable to utilize other available channels in the network based on the availability for the particular PLMN on the higher RATs while switching to lower RATs.
  • the present invention aims to eliminate the need of selecting a lower priority radio access technology (RAT) .
  • RAT radio access technology
  • Another object of the present invention is to switch to a lower RAT if the network or the user device does not support the higher RAT on current channel and then switch back to higher priority RAT operating on different band/channel.
  • Yet another object of the present invention is to ensure that the user device is operated at the higher RAT while being connected with the network.
  • one aspect of the present invention may relate to a method for availing services in a network by a user device, the method being performed by the user device.
  • the method comprising: transmitting an attach request to a network entity by the user device being operated with a first combination of a PLMN and a first channel, wherein the user device currently supports a first radio access technology, and the attach request comprises a combined EPS/IMSI attach type indicating that the user device supports EPS services and non-EPS services; receiving a system information message and a registration accept message from the network entity, wherein the registration accept message indicates that the network entity supports EPS services only; analyzing the registration accept message and the system information message to disable the first combination of the PLMN and the first channel in an event of user device not supporting the VoPS or in an event of the network entity not supporting VoPS; selecting a second combination of the PLMN and a second channel available in the network for the user device ; ; and availing the services in the network by the user device being operated with said second combination
  • the user device comprising: a communication unit configured to: transmit an attach request to a network entity by the user device being operated with a first combination of a PLMN and a first channel, wherein the user device currently supports a first radio access technology, and the attach request comprises a combined EPS/IMSI attach type indicating that the user device supports EPS services and non-EPS services, and receive a registration accept message and a system information message from the network entity, wherein the registration accept message indicates that the network entity supports EPS services only; and a processing unit configured to: analyze the registration accept message and the system information message to disable the first combination of the PLMN and the first channel in an event of user device not supporting voice over packet switching (VoPS) or in an event of the network entity not supporting voice over the packet switching (VoPS) , selecting a second combination of the PLMN and a second channel available in the network for the user device, wherein the second combination is selected by disabling the first
  • FIG. 1 illustrates a system architecture [100] for availing services in a network by a user device being operated with a combination of a second channel and a PLMN, in accordance with exemplary embodiments of the present invention.
  • FIG. 2 illustrates an exemplary method flow diagram [200] for availing services in a network by a user device being operated with a combination of a second channel and a PLMN, in accordance with exemplary embodiments of the present invention.
  • the user device In order to avail the services in the network, the user device currently supporting a first RAT and being operated in a first combination of a first channel and a PLMN, transmits an attach request (comprising a combined EPS/IMSI attach type) to a network entity.
  • an attach request comprising a combined EPS/IMSI attach type
  • the user device receives a registration accept message and a system information message from the network entity indicating that the network entity supports only EPS services and does not support voice over packet switching (VoPS) or the user device is not capable of VoPS .
  • the user device Based on the registration accept message, the user device disables the first combination by simply disabling the first channel in an event the user device does not support voice over packet switching (VoPS) or in an event the network entity does not support VoPS.
  • the user device selects a second channel available in the network, thereby selecting a second combination of the second channel and the PLMN such that said second channel is supported by the current (same) PLMN.
  • the user device being in the second combination, avails the services in the network using the first RAT.
  • the services as used herein may refer to EPS services and non-EPS services.
  • the services may comprise at least one of a voice call, multimedia broadcast multicast message, a voice message, a short message service, a VoIP data, a video data and internet data.
  • the user device as used herein may refer to any computing device operable with one or more subscriber identity module (SIM) .
  • SIM subscriber identity module
  • the user device includes, but not limited to, a smart phone, a mobile phone, a tablet, a phablet and any such device as obvious to a person skilled in the art.
  • the user device may comprise an input means such as a processor, an operating system, a storage unit, a display interface, etc. which functions/communicates with the network entities such as base station or any such network entity as may be obvious to a person skilled in the art.
  • the user device may be in one of a data centric mode and a voice centric mode.
  • the user device may bind to an evolved packet code (EPC) network, i.e. evolved packet system (EPS) services shall operate in one of the following operation modes:
  • EPC evolved packet code
  • EPS evolved packet system
  • Packet Switch (PS) mode 1 of operation the user device registers only to EPS services, and the usage setting of the user device is "voice centric" in nature.
  • PS mode 2 of operation the user device registers only to EPS services, and the usage setting of the user device is "data centric" in nature.
  • Circuit Switch/Packet Switch (CS/PS) mode 1 of operation the user device registers to both EPS and non-EPS services, and the usage setting of the user device is "voice centric" in nature;
  • Circuit Switch/Packet Switch (CS/PS) mode 2 of operation the user device registers to both EPS and non-EPS services, and the usage setting of the user device is "data centric" in nature.
  • the network as used herein may refer to a LTE network or a 5G network.
  • the network entity may include, but not limited to, a serving base station, a macro base station (for LTE terminology known as eNodeB) , a small cell and an outdoor small cell.
  • the network and the user device may be connected to each other through one or more wireless channels supporting a single PLMN.
  • the first combination as used herein may refer to a combination of a first channel and a PLMN supported by the user device.
  • the first channel corresponds to the channel currently supported by the user device while attaching to the network entity, wherein the PLMN supports the first channel.
  • the second combination as used herein may refer to a combination of a second channel being selected among a plurality of available channels in the network and the PLMN (previous) supported by the user device.
  • the second channel corresponds to the channel selected after the disabling of the first combination, wherein the PLMN supports the second channel as well.
  • the public land mobile network as used herein supports the first radio access technology and the second radio access technology. Also, the PLMN supports multiple channels for e.g. the first channel and the second channel.
  • the system information message as used herein may refer to an EPS/EMM cause code and network information that indicates the network capability of the network entity i.e. whether the network entity supports the legacy voice services or not.
  • the system information may specifically refer to the code EMM Cause 18 indicating that CS domain is not available.
  • the first radio access technology (RAT) as used herein may correspond to 4G and 5G technology.
  • the second radio access technology (RAT) as used herein may correspond to a radio access technology being lower than the first radio access technology.
  • the second radio access technology (RAT) as used herein may correspond to 3G and 2G, when the first radio access technology corresponds to 4G.
  • the second radio access technology (RAT) may correspond to 4G, 3G and 2G when the first radio access technology (RAT) corresponds to 5G.
  • the invention encompasses that the first radio access technology may support only packet switching.
  • a “processing unit” includes one or more processors, wherein processor refers to any logic circuitry for processing instructions.
  • a processor may be a general-purpose processor, a special purpose processor, a conventional processor, a digital signal processor, a plurality of microprocessors, one or more microprocessors in association with a DSP core, a controller, a microcontroller, Application Specific Integrated Circuits, Field Programmable Gate Array circuits, any other type of integrated circuits, etc.
  • the processor may perform signal coding data processing, input/output processing, and/or any other functionality that enables the working of the system according to the present disclosure.
  • connect As used herein, “connect” , “configure” , “couple” and its cognate terms, such as “connects” , “connected” , “configured” and “coupled” may include a physical connection (such as a wired/wireless connection) , a logical connection (such as through logical gates of semiconducting device) , other suitable connections, or a combination of such connections, as may be obvious to a skilled person.
  • send As used herein, “send” , “transfer” , “transmit” , and their cognate terms like “sending” , “sent” , “transferring” , “transmitting” , “transferred” , “transmitted” , etc. include sending or transporting data or information from one unit or component to another unit or component, wherein the content may or may not be modified before or after sending, transferring, transmitting.
  • FIG. 1 illustrates a preferred embodiment of the present invention which encompasses a system architecture for availing services in a network by a user device where the user device [110] is currently operated with a first combination of a PLMN and a first channel, and the user device [110] currently supports a first radio access technology.
  • the system [100] comprises a user device [110] connected with the network entity [210] .
  • the user device [110] comprises at least a communication unit [112] , a processing unit [114] and a storage unit [116]
  • the network entity [210] comprises at least a communication unit [212] and a storage unit [214] .
  • the user device [110] , the network entity [210] and the subcomponents therein are configured to work in conjunction and provide respective functionalities in order to achieve the objectives of the present invention.
  • the communication unit [112] of the user device [110] is configured to transmit an attach request to the communication unit [212] of the network entity [210] , wherein the user device is operated with the first combination of the PLMN and the first channel, and also the user device [110] currently supports the first radio access technology (RAT) .
  • the attach request of the user device [110] comprises a combined EPS/IMSI attach type indicating that the user device [110] supports EPS services and non-EPS services.
  • the communication unit [212] of the network entity [210] on receiving the attach request from the user device [110] is configured to analyse the attach request and subsequently transmits a registration accept message and a system information message to the communication unit [112] of the user device [110] .
  • the system information message and the registration accept message comprises an EPS/EMM cause code and the information relating to the network capabilities of the network entity [210] , respectively.
  • the system information message comprises an EMM cause code 18 indicating that the network entity [210] supports only EPS services and does not allow non-EPS services i.e. Circuit switch (CS) services.
  • the registration accept message indicates the attach result, for instance, it may indicate that the network entity supports only EPS services.
  • the communication unit [110] of the user device [110] internally communicates the registration accept message to the processing unit [114] of the user device [110] .
  • the processing unit [114] is configured to analyse the registration accept message and the system information message to check whether or not the network entity [210] supports the EPS services. In an event, currently, the user device [110] does not support voice over packet switching (VoPS) or in the event the network entity [210] does not support voice over packet switching (VoPS) , the processing unit [114] is configured to disable the first combination of the first channel and the PLMN.
  • VoIP voice over packet switching
  • the processing unit [114] is configured to disable the first combination of the first channel and the PLMN.
  • VoPS voice over packet switching
  • IMS IP Multimedia subsystem
  • the VoPS corresponds to VoLTE technology (also based on IMS) in LTE network and may correspond to a similar suitable technology in 5G network.
  • the processing unit [114] is also configured to select a new channel i.e. a second channel among the available channels supporting the same PLMN.
  • the second channel is selected by disabling the first channel.
  • the second channel is selected in a similar manner as the channel is selected on a reboot.
  • the processing unit [114] is configured to switch to the second radio access technology (lower radio access technology) and then switch back to the first radio access technology (higher radio access technology) based on the availability of second channel of the first radio access technology as described above.
  • the communication unit [112] of the user device [110] is further configured to avail the services in the network, wherein the user device [110] is now operated with said second combination of the PLMN and the second channel.
  • the communication unit [112] of the user device [110] avails the services using the first RAT
  • the communication unit [112] of the user device [110] avails the services using the second RAT.
  • the storage unit [116] of the user device [110] and the storage unit [214] of the network entity [212] are configured to store information relating to the system information message, the attach type, the list of equivalent PLMNs, the list of new PLMNs, the first radio access technology and the second radio access technology.
  • the storage units [116] [214] as used herein may refer to any non-transitory media configured to store said information. Further, said storage units [116] [214] may be volatile memory or a non-volatile memory.
  • FIG. 2 illustrates an exemplary method flow diagram [200] comprising the method for availing services in a network by the user device [110] , in accordance with an embodiment of the present invention.
  • the method [200] may initiate at step 202 where the user device [110] is currently operated with a first combination of a PLMN and a first channel, and the user device [110] currently supports a first radio access technology.
  • the communication unit [112] of the user device [110] transmits the attach request to the communication unit [212] of the network entity [210] , wherein the user device [110] is operated with the first combination of the PLMN and the first channel, and also the user device [110] currently supports the first radio access technology (RAT) .
  • the attach request of the user device [110] comprises a combined EPS/IMSI attach type indicating that the user device [110] supports the EPS services as well as non-EPS services.
  • the communication unit [212] of the network entity [210] analyses that attach request and subsequently transmits the registration accept message and the system information message to the communication unit [112] of the user device [110] .
  • the system information message and the registration accept message comprises the EPS/EMM cause code, and the information relating to the network capabilities of the network entity [210] respectively.
  • the system information message comprises an EMM cause code 18 indicating that the network entity [210] supports only EPS services and does not allow non-EPS services i.e. CS services.
  • the communication unit [110] of the user device [110] internally communicates the registration accept message to the processing unit [114] of the user device [110] .
  • the processing unit [114] analyses the registration accept message and the system information message and checks whether the EMM cause code 18 is present or not.
  • the method [200] may terminate at step 220, i.e the user device [110] will continue to operate with a first combination of a PLMN and a first channel.
  • the method [200] may lead to step 210.
  • the processing unit [114] disables the first combination of the first channel and the PLMN.
  • the processing unit [114] disables the first combination of the first channel and the PLMN to select second channel or alternate channel on the same PLMN and on the same RAT.
  • the processing unit [114] selects a second combination of the second channel and the PLMN i.e. a new channel for the same PLMN among the available channels.
  • the second channel is selected in a similar way as the channel is selected when it reboots.
  • the communication unit [112] avails the services in the network, wherein the user device [110] is now operated with said second combination of the PLMN and the second channel, and the user device [110] supports the first radio access technology.
  • the method [200] may then terminate at step 216.
  • the processing unit [114] switches to the second radio access technology which is a lower radio access technology than the first radio access technology.
  • the processing device [114] switches from 4G or 5G (higher radio access technology) to a lower radio access technology such as 2G, 3G etc.
  • the switching of the first radio access technology to the second radio access technology is then notified to the communication unit [112] of the user device [110] .
  • the communication unit [112] avails the services in the network, wherein the user device [110] is now operated in the second Radio Access Technology.
  • the communication unit [112] re-analyses the system information and registration accept message to check if the PLMN supports the first radio access technology (i.e. higher radio access technology than the second RAT) on alternate channels (i.e channels other than the first channel) . In case alternate channels are available, the user device [110] switches back to the first radio access technology, wherein the user device [110] is now operated with said second combination of the PLMN and the second channel.
  • the present invention encompasses eliminating the need of searching a new PLMN altogether for availing the services in the network by a user device. This is done by selecting a new channel for the same PLMN, where the network or the user device does not support VoPS. Also, the present invention encompasses switching from the first radio access technology to the second radio access technology in an event the network entity or the user device does not support the VoPS in the first radio access technology, and then switching back to the first radio access technology based on the availability of second channel in the first radio access technology.

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

Abstract

La présente invention concerne un système [100] et un procédé [200] pour la mise à disposition de services dans des réseaux LTE/5G par le dispositif utilisateur [110] sur la base d'une combinaison PLMN/canal. Le dispositif utilisateur [110] transmet une demande de rattachement à une entité réseau [210], le dispositif utilisateur [110] prenant en charge la première RAT et utilisant une première combinaison d'un premier canal et d'un PLMN. En outre, si l'entité réseau [210] ou le dispositif utilisateur [110] ne prend pas en charge des VoP, le dispositif utilisateur [110] désactive la première combinaison et sélectionne une seconde combinaison comprenant un nouveau canal prenant en charge le même PLMN. Ainsi, le dispositif utilisateur [110] met à disposition les services dans le réseau en prenant en charge ladite seconde combinaison à l'aide d'une première RAT.
PCT/CN2020/089667 2019-06-12 2020-05-11 Mise à disposition de services dans un réseau lte/5g par un dispositif utilisateur sur la base d'une combinaison plmn/canal WO2020248752A1 (fr)

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CN202080032982.6A CN113785620B (zh) 2019-06-12 2020-05-11 用户设备基于plmn/信道的组合利用lte/5g网络中的服务

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IN201941023202 2019-06-12
IN201941023202 2019-06-12

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11711732B2 (en) 2021-05-19 2023-07-25 Microsoft Technology Licensing, Llc Minimizing disruption to a voice call in a mobile network that includes different network segments having different capabilities for supporting voice calls

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130178208A1 (en) * 2012-01-05 2013-07-11 Teliasonera Ab Network selection in a shared network environment
EP2806694A1 (fr) * 2013-05-21 2014-11-26 Samsung Electronics Co., Ltd Procédé et appareil pour la re-sélection d'une cellule dans un système de communication mobile basé sur support de repli sur commutation de circuit (CSFB)
US20160262058A1 (en) * 2014-02-07 2016-09-08 Samsung Electronics Co., Ltd. Apparatus and method for providing service in a mobile communication system
WO2019071377A1 (fr) * 2017-10-09 2019-04-18 Qualcomm Incorporated Configuration pour la prise en charge de services vocaux existants dans un système 5g

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107635270B (zh) * 2016-07-13 2021-03-05 三星电子株式会社 在用户设备处理具有#14原因的附接拒绝消息的方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130178208A1 (en) * 2012-01-05 2013-07-11 Teliasonera Ab Network selection in a shared network environment
EP2806694A1 (fr) * 2013-05-21 2014-11-26 Samsung Electronics Co., Ltd Procédé et appareil pour la re-sélection d'une cellule dans un système de communication mobile basé sur support de repli sur commutation de circuit (CSFB)
US20160262058A1 (en) * 2014-02-07 2016-09-08 Samsung Electronics Co., Ltd. Apparatus and method for providing service in a mobile communication system
WO2019071377A1 (fr) * 2017-10-09 2019-04-18 Qualcomm Incorporated Configuration pour la prise en charge de services vocaux existants dans un système 5g

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MOTOROLA SOLUTIONS: "Addition of band class and frequency information to USIM for system acquisition", C1-134596， 3GPP TSG-CT WG1 MEETING #85, 15 November 2013 (2013-11-15), XP050746624 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11711732B2 (en) 2021-05-19 2023-07-25 Microsoft Technology Licensing, Llc Minimizing disruption to a voice call in a mobile network that includes different network segments having different capabilities for supporting voice calls

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