WO2014146723A1 - Procédé de transfert de technologies d'accès inter radio avec informations de capacité incomplètes du terminal utilisateur - Google Patents

Procédé de transfert de technologies d'accès inter radio avec informations de capacité incomplètes du terminal utilisateur Download PDF

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Publication number
WO2014146723A1
WO2014146723A1 PCT/EP2013/056113 EP2013056113W WO2014146723A1 WO 2014146723 A1 WO2014146723 A1 WO 2014146723A1 EP 2013056113 W EP2013056113 W EP 2013056113W WO 2014146723 A1 WO2014146723 A1 WO 2014146723A1
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Prior art keywords
capability information
information
communication device
capabilities
incomplete
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English (en)
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Woonhee Hwang
Jürgen Hofmann
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Nokia Solutions and Networks Oy
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Nokia Solutions and Networks Oy
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Priority to PCT/EP2013/056113 priority Critical patent/WO2014146723A1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H04W36/00224—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
    • H04W36/00226—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB] wherein the core network technologies comprise IP multimedia system [IMS], e.g. single radio voice call continuity [SRVCC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities

Definitions

  • This disclosure relates to handovers in a communication system and more particularly to handover of a communication device between different access systems.
  • a communication system provides a facility that enables communication sessions between two or more entities such as fixed or mobile communication devices, base stations, servers, machine type devices and/or other communication nodes.
  • a communication system and compatible communicating entities typically operate in accordance with a given standard and/or specification setting out how the various entities shall operate.
  • a wireless communication system at least a part of the communication between at least two devices, or stations occurs over a wireless interface. Examples of specifications defining wireless communication include those standardised by the 3rd Generation Partnership Project (3GPP). The various development stages of the 3GPP specifications are referred to as releases.
  • 3GPP 3rd Generation Partnership Project
  • Wireless communication systems include various cellular or otherwise mobile communication systems using radio frequencies for sending voice or data between stations, for example between a communication device and a transceiver network element.
  • wireless communication systems may comprise public land mobile network (PLMN), such as global system for mobile communication (GSM), the general packet radio service (GPRS) and the universal mobile telecommunications system (UMTS).
  • PLMN public land mobile network
  • GSM global system for mobile communication
  • GPRS general packet radio service
  • UMTS universal mobile telecommunications system
  • a mobile communication network may logically be divided into a radio access network (RAN) and a core network (CN).
  • the core network entities typically include various control entities and gateways for enabling communication via a number of radio access networks and also for interfacing a single communication system with one or more communication systems, such as with other wireless systems, such as a wireless Internet Protocol (IP) network, and/or fixed line communication systems, such as a public switched telephone network (PSTN).
  • IP Internet Protocol
  • PSTN public switched telephone network
  • the radio access network may provide a connection between the core network (CN) and a communication device such as a user equipment (UE) and implements a radio access technology.
  • Examples of radio access networks may comprise the UMTS terrestrial radio access network (UTRAN), the GSM/EDGE radio access network (GERAN) and/or enhanced UTRAN (EUTRAN) for long term evolution (LTE).
  • the radio access network may include various element and functionalities such as a base station (BS), node B (NB), enhanced node B (eNB), base station subsystem (BSS) and/or a radio network controller (RNC).
  • BS base station
  • NB node B
  • eNB enhanced node B
  • BSS base station subsystem
  • RNC radio network controller
  • a handover of a communication device may occur when the device is in the coverage area of two different access points (for example a base station, node B or eNodeB) of a radio access network.
  • Different radio access technologies RAT
  • a handover may therefore occur between different access points supporting different radio access technologies.
  • a handover between different radio access technologies is often called inter-RAT handover.
  • An example of inter-RAT handovers is a handover from GERAN to EUTRAN. This can take place as a Reverse Single Radio Voice Call Continuity (rSRVCC) and/or packet switched (PS) handover.
  • rSRVCC Reverse Single Radio Voice Call Continuity
  • PS packet switched
  • a communication device possesses predefined capabilities. These depend on the type of the device and the standard and version thereof it is adapted to comply with. More advances devices tend to have more capabilities than the earlier models.
  • a communication device such as a user equipment (UE) performs inter-RAT handover
  • source radio access network (RAN) is supposed to provide information of the capabilities of the device to the target access system during the handover preparation.
  • the target access system is then supposed to generate a handover command message accordingly.
  • source GERAN is supposed to acquire EUTRAN capabilities of the UE and should provide these to eNB of the target EUTRAN during the handover preparation.
  • the EUTRAN capability information of the UE may be too large for a GSM based system to acquire. This can mean that the EUTRAN capabilities are not available for the target eNB.
  • LTE long term evolution
  • the target eNB when configuring the handover command the target eNB may not know for instance the capabilities related to radio link control (RLC) layer or Packet Data Convergence Protocol (PDCP) layers. If these parameters related to capabilities are configured incorrectly, the target eNB may need to do full configuration after the inter-RAT handover, or in the worst case, the target eNB may need to release the radio bearer as some configurations cannot be changed during the life time of the bearer.
  • RLC radio link control
  • PDCP Packet Data Convergence Protocol
  • An issue may relate to instances where operators may have policies on how to provide voice call continuity in their network across the LTE, UMTS and GSM. If operators provide the voice call in LTE and UMTS using voice over internet protocol (VoIP) but circuit switched (CS) voice only in the GSM, the target eNB should know the UE capability related to voice support in different radio access technologies as well as voice call continuity capability in different radio access technology combinations. The handover may fail due to admission control failure on the target eNB.
  • VoIP voice over internet protocol
  • CS circuit switched
  • Embodiments of the invention aim to address one or several of the above issues.
  • a method for inter radio access technology handover of a communication device with certain capabilities comprising receiving capability information for the communication device, the capability information being incomplete capability information comprising information of a predefined minimum of capabilities, sending the incomplete capability information to a target access system, and informing the target access system that it is provided with incomplete capability information.
  • a method for inter radio access technology handover of a communication device with certain capabilities comprising receiving, from a source access system, capability information for the communication device and information that the capability information is incomplete, the received capability information comprising information of a predefined minimum of capabilities, determining need for more capability information in response to said information that the received capability information is incomplete, and sending a request for capability information to the communication device.
  • a method in a communication device with certain capabilities comprising determining capability information for the communication device for sending to a source access system, the capability information being incomplete capability information comprising information of a predefined minimum of capabilities, sending the incomplete capability information to the source access system, receiving a request for capability information from a target access system after an inter radio access technology handover, the request being triggered by information that said capability information provided by the communication device is incomplete, and sending further capability information to the target access system.
  • an apparatus for a source access system in inter radio access technology handover of a communication device with certain capabilities comprising at least one processor, and at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processor, cause the apparatus at least to receive capability information for the communication device, the capability information being incomplete capability information comprising information of a predefined minimum of capabilities, send the incomplete capability information to a target access system, and inform the target access system that it is provided with incomplete capability information.
  • an apparatus for a target access system in inter radio access technology handover of a communication device with certain capabilities comprising at least one processor, and at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processor, cause the apparatus at least to receive, from a source access system, capability information for the communication device and information that the capability information is incomplete, the incomplete capability information comprising information of a predefined minimum of capabilities, determine need for more capability information for the communication device in response to said information that the received capability information is incomplete, and send a request for capability information to the communication device.
  • apparatus for a communication device with certain capabilities comprising at least one processor, and at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processor, cause the apparatus at least to determine capability information for the communication device for sending to a source access system, the capability information being incomplete capability information comprising information of a predefined minimum of capabilities, send the incomplete capability information to the source access system, receive a request for capability information from a target access system of an inter radio access technology handover, the request being triggered by information that said capability information received from the communication device is incomplete, and send further capability information to the target access system.
  • the information of predefined minimum of capabilities is provided in accordance with 3GPP release 9 specifications and the certain capabilities are in accordance with specifications for 3GPP Long Term Evolution as defined in 3GPP specifications according to release 10 or later.
  • the inter radio access technology handover may be provided to a radio access technology where the length of capability information is more than 512 octets.
  • the information of predefined minimum of capabilities can be defined to be sufficient for the target access node to generate a handover command in EUTRAN.
  • Incompleteness of capability information provided by the communication device may be indicated by a bit communicated from the source access system to the target access system.
  • Information of incompleteness of capability information may also be communicated in information regarding the release of a relevant standard in an access stratum release information element. Further capability information may be requested when the release is indicated as being 3GPP release 10 or later.
  • the communication device can be arranged to communicate information that the provided capability information is incomplete.
  • Information of predefined minimum of capabilities and information that capability information is incomplete may be communicated during inter radio access technology handover preparation phase.
  • a request for capability information may be communicated after the communication device has been handed over to the target access system.
  • Capability information for the communication device may be determined based on a radio access technology type and size of capability information.
  • a computer program comprising program code means adapted to perform the herein described methods may also be provided.
  • apparatus and/or computer program product that can be embodied on a computer readable medium for providing at least one of the above methods is provided.
  • Figure 1 shows an example of a communication system wherein below described examples of the invention may be implemented
  • Figure 2 shows an example of a communication device
  • Figure 3 shows an example of control apparatus for a radio access network
  • Figures 4 to 6 are flowcharts illustrating certain examples.
  • a mobile communication device 21 is typically provided wireless access via at least one radio access system provided by a node such as a base station or similar wireless transceiver node.
  • An access system may be provided by a cell of a cellular system or another radio service system enabling a communication device to access a communication system.
  • base stations 12 and 14 provide each a radio service area or a cell of a cellular system 10.
  • Each cell can be a part of a radio access system 16 and 17.
  • a radio access system can comprise a multiple of cells. It is also possible for radio access system to consist of a single cell.
  • a base station site can provide more than one cell and/or a plurality of sectors, for example three radio sectors, each sector providing a cell or a sub radio service area of a cell.
  • a base station and the associated radio access network is typically controlled by at least one appropriate controller so as to enable operation thereof and management of mobile communication devices in communication with the base station.
  • the control apparatus can be interconnected with other control entities.
  • a control apparatus of base station 12 and thus the radio access system provided by the base station 12, is shown schematically as being provided by block 13.
  • Control apparatus of base station 14 is shown schematically as being provided by block 15.
  • a suitable control apparatus can be provided with memory capacity and at least one data processor, as will be explained in more detail later.
  • the control apparatus and functions may be distributed between a plurality of control units.
  • the control apparatus of different radio access systems can be connected via an interface for signalling purposes, as indicated by the dashed line 18.
  • the connection between the access systems may involve intermediate nodes.
  • Non-limiting examples of radio access systems comprise those based on the long-term evolution (LTE) of the Universal Mobile Telecommunications System (UMTS) that is standardized by the 3rd Generation Partnership Project (3GPP).
  • LTE long-term evolution
  • UMTS Universal Mobile Telecommunications System
  • 3GPP 3rd Generation Partnership Project
  • eNB evolved NodeB
  • LTE based systems can employ a mobile architecture known as the Evolved Universal Terrestrial Radio Access Network (EUTRAN). This is illustrated by the access system 17 of Figure 1.
  • Base stations such as ENBs may provide E-TRAN features such as user plane Radio Link Control/Medium Access Control/Physical layer protocol (RLC/MAC/PHY) and control plane Radio Resource Control (RRC) protocol terminations towards the communication devices.
  • RLC/MAC/PHY Radio Link Control/Medium Access Control/Physical layer protocol
  • RRC Radio Resource Control
  • Access systems can also be based on the 2 nd Generation standards, this being illustrated by the access system 16 in Figure 1. More particularly, e.g. a GERAN based access may be provided.
  • the acronym GERAN is usually understood to stand for GSM/EDGE Radio Access Network, although GERAN can be more widely be understood as the term given to any second-generation digital cellular GSM radio access technology, including its evolutions in the form of the Enhanced Data rates for Global Evolution (EDGE) and, for most purposes, the General Packet Radio Service (GPRS).
  • GERAN is a part of GSM, including combined UMTS/GSM networks.
  • GERAN is the radio part of GSM/EDGE together with the network that joins base stations and base station controllers (BSC).
  • WLAN wireless local area network
  • WiMax Worldwide Interoperability for Microwave Access
  • example access systems 16 and 17 are connected to a wider communications network 19.
  • a gateway function may be provided to connect to another network via the network 19.
  • the other network may be any appropriate network.
  • a wider communication system may thus be provided by one or more interconnect networks and the elements thereof, and one or more gateways may be provided for interconnecting various networks.
  • FIG. 2 shows a schematic, partially sectioned view of a communication device 21 that a user can use for communication.
  • a communication device is often referred to as user equipment (UE) or terminal.
  • An appropriate mobile communication device may be provided by any device capable of sending and receiving radio signals.
  • Non-limiting examples include a mobile station (MS) such as a mobile phone or what is known as a 'smart phone', a portable computer provided with a wireless interface card or other wireless interface facility, personal data assistant (PDA) provided with wireless communication capabilities, or any combinations of these or the like.
  • a mobile communication device may provide, for example, communication of data for carrying communications such as voice, electronic mail (email), text message, multimedia, positioning data, other data, and so on. Users may thus be offered and provided numerous services via their communication devices. Non-limiting examples of these services include two-way or multi-way calls, data communication or multimedia services or simply an access to a data communications network system, such as the Internet.
  • a mobile device is typically provided with at least one data processing entity 23, at least one memory 24 and other possible components 29 for use in software and hardware aided execution of tasks it is designed to perform, including control of access to and communications with base stations and other communication devices.
  • the data processing, storage and other relevant control apparatus can be provided on an appropriate circuit board and/or in chipsets. This feature is denoted by reference 26. Data processing and memory functions provided by the control apparatus of the mobile device to cause control and signalling operations in accordance with certain embodiments of the present invention will be described later in this description.
  • the user may control the operation of the mobile device by means of a suitable user interface such as key pad 22, voice commands, touch sensitive screen or pad, combinations thereof or the like.
  • a display 25, a speaker and a microphone are also typically provided.
  • a mobile communication device may comprise appropriate connectors (either wired or wireless) to other devices and/or for connecting external accessories, for example hands-free equipment, thereto.
  • the mobile device 21 may receive and transmit signals 28 via appropriate apparatus for receiving and transmitting signals.
  • transceiver apparatus is designated schematically by block 27.
  • the transceiver may be provided for example by means of a radio part and associated antenna arrangement.
  • the antenna arrangement may be arranged internally or externally to the mobile device.
  • a wireless communication device can be provided with a Multiple Input / Multiple Output (MIMO) antenna system.
  • MIMO Multiple Input / Multiple Output
  • Figure 3 shows an example of a control apparatus 30, for example to be coupled to and/or for controlling a radio access system 16 and/or 17 of Figure 1 .
  • the control apparatus 30 can be arranged to process and/or control signalling and other communications by mobile communication devices in a service area of a station.
  • the control apparatus 30 can be configured to provide control functions in association with communication of information regarding handovers.
  • the control apparatus 30 can comprise at least one memory 31 , at least one data processing unit 32, 33 and an input/output interface 34. Via the interface the control apparatus can be coupled to receiver and transmitter apparatus of a base station.
  • the control apparatus 30 can be configured to execute an appropriate software code to provide the control functions.
  • a mobile device can be handed over from a station of a source access system 16 to a station of a target access system.
  • the mobile device 21 may be handed over from the station 12 to be served by the station 14.
  • the reasons triggering handover as such are not relevant in understanding the invention, and thus do not require any more detailed explanation.
  • the herein described embodiments relate to information that may be communicated between the various entities in preparation for and after the handover.
  • GSM based systems set a limitation on the size of capability information than can be communicated by the source system to the target system.
  • the coding may not allow transfer of more capability information than 512 octets because the message length is restricted to 512 octets.
  • the size of EUTRAN capabilities can be larger than 512 octets.
  • the source GERAN will not be able to acquire all EUTRAN capability information and cannot provide a full set of EUTRAN capabilities to the target eNB, should there be a need for Reverse Single Radio Voice Call Continuity (rSRVCC) and/or packet switched (PS) handover from GERAN to EUTRAN.
  • rSRVCC Reverse Single Radio Voice Call Continuity
  • PS packet switched
  • the communication device can provide information on the capabilities thereof.
  • an user equipment can provide different sets of information in the source network and the target network.
  • a minimum set of communication device capabilities can be defined, and the device provides this information to the source access network.
  • Complete set of capability information can then be provided by the device later to the target access network.
  • the communication device can provide at least two sets of LTE capabilities, that is a full set and a smaller (a reduced / subset) of capabilities.
  • Figure 4 shows an example for operation at the source access system involved in inter radio access technology handover of a communication device with certain capabilities.
  • capability information for the communication device is received from the device.
  • the capability information comprises an incomplete set of capability information comprising information of a predefined minimum of capabilities.
  • the incomplete capability information is sent at 41 to a target access system and the target access system is also informed at 42 that it is provided with incomplete capability information.
  • the predefined minimum of capabilities is defined as a whole set of UE capabilities in accordance with a release or version of a technical specification and/or standard. Because of compliance with the particular release or version, the network can operate normally based on those minimum of capabilities accordingly.
  • Figure 5 illustrates a method for inter radio access technology handover of a communication device with certain capabilities in a target access system.
  • the target access system receives, from a source access system, at 50 capability information for the communication device.
  • the target access system also receives information that the capability information is incomplete, indicating that the received capability information comprises information of a predefined minimum of capabilities. It is then determined at 51 whether more capability information is needed in response to said information that the received capability information is incomplete.
  • a request for capability information is sent to the communication device at 52. More capability information is received and the operation is continued by taking this information into account at 53. If it is determined that no further information is needed, the operation can continue at 54 based on information received from the source system at 50.
  • Figure 6 illustrates an example for operation in a communication device with certain capabilities.
  • capability information for the communication device is determined at 60 for sending to a source access system.
  • the determined capability information is an incomplete set of capability information comprising information of a predefined minimum of capabilities.
  • the incomplete capability information is signalled at 61 to the source access system.
  • a request is then received at 62 for capability information from a target access system of an inter radio access technology handover. The request is triggered by information that said capability information provided by the communication device is incomplete. Further capability information is transmitted at 63 to the target access system.
  • the predefined minimum may be based on the connected RAT and the actual size of capability information.
  • the information of a predefined minimum of capabilities provided by the communication device can include, in addition to the incomplete set of capabilities, an indication that the provided capabilities are not a complete set for the target access system. This information can be communicated for example as for a bit or another indicator flag. The indication may also be sent as a part of a release indicator, and interpreted e.g. implicitly from the release value in the capability.
  • the UE provides a reduced set of EUTRAN capabilities to a serving base station subsystem (BSS).
  • BSS serving base station subsystem
  • This smaller set can comprise EUTRA capabilities in accordance with 3GPP Release 9 definitions.
  • the serving BSS can acquire the reduced set without size problem and can forward the reduced set to the target eNB in case of an inter-RAT handover from the GSM to LTE.
  • Target eNB can then perform normal call admission control for incoming calls based on the LTE UE capabilities.
  • the target eNB is also provided with information whether the EUTRAN capabilities it receives during handover preparation is a whole set or not. This is advantageous since if the set is not a whole set, the target eNB can determine whether it should acquire the whole set of EUTRAN capabilities from the UE. If the source access system provides the baseline setting for the handover the operation does not necessarily impact the target eNB. For example, no assumptions may need to be defined.
  • a complete UE capabilities set or no UE capabilities at all a subset of predefined minimum of the UE capabilities can be provided.
  • An additional indication is provided to indicate to the target side that the transferred UE capabilities are incomplete and that retrieval of the missing information from the UE would be beneficial in order to be able to fully exploit the potential of the UE.
  • the following describes examples how to handle UE radio capabilities transfer in case of reverse single radio voice call continuity (rSRVCC) from GERAN to E- UTRAN while maintaining the message size limitation.
  • UE capabilities comprises sending information to an eNB of the UE LTE capabilities during the handover from GSM to LTE.
  • the UE LTE capabilities defined in 3GPP Release 9 can be signalled as a minimum UE capability during handover preparation phase for handover from GSM to LTE.
  • the target eNB gets the complete set of UE capabilities from the UE after the UE handovers to LTE.
  • Obtaining the full capability information can be triggered e.g. by an appropriate flag such as a bit in a message signalled during handover preparation. The bit informs the eNB that eNB was only provided a predefined minimum set of UE capabilities so eNB knows to acquire full UE LTE capabilities from the UE.
  • the indication is provided by access stratum release information included as part of the minimum set of UE capabilities and indicating the actual release(s) supported by the UE.
  • the predefined minimum capability signalled to the eNB in handover preparation can be the 3GPP Release 9 capability or another predefined minimum capability.
  • a target eNB always acquires UE capabilities after inter-RAT handover from GERAN.
  • the source RAT type can provide a trigger of UE capability acquisition from the UE after the inter-RAT handover.
  • UE capabilities may be triggered as a default after e.g. a GSM to LTE handover.
  • the eNB can assume as a default that the UE has capability of rel9 which has been explicitly signalled to it during handover preparation.
  • the eNB needs to acquire the full UE capability from UE after it is handed over to LTE.
  • minimum UE capabilities are included in a new message on the air interface defined for this purpose or an existing message can be reused. Any appropriate existing message is used to carry the information, and thus for example, Location / Routing Area Update (LAU / RAU) or ATTACH message can be used to acquire LTE UE capabilities.
  • a network entity such as a mobile switching centre (MSC) or Serving General Packet Radio System (GPRS) Support Node (SGSN) can then provide them to a base station subsystem (BSS).
  • MSC mobile switching centre
  • GPRS General Packet Radio System
  • BSS base station subsystem
  • the minimum capabilities can be EUTRAN capabilities as defined in Release 9 of 3GPP TS36.331 specification, see e.g. version 9.14.0 (2013-03).
  • 3GPP Release 9 capabilities As the predefined minimum information, all mandatory parameters can be already provided during the handover preparation and the target eNB can produce the handover command accordingly to meet the requirements of 3GPP release 10 and later versions.
  • the herein described scheme works even if the target eNB has not been adapted to act in response to the information of incompleteness. This is so because the target eNB has been provided with LTE capabilities, even though the capabilities are reduced. That is, the target eNB will consider the UE to be a Release 9 UE and even with the reduced capability information, everything can be assumed to work normally.
  • the signalling can be used as it is without upgrading or otherwise adapting the eNBs as the source GERAN provides the minimum EUTRAN capabilities during the handover preparation, and therefore mandatory EUTRAN capabilities are provided and the eNB does not need to distinguish error case with normal case without EUTRAN capabilities.
  • target eNB can continue to use the existing call admission control for incoming handover.
  • the target eNB can be configured to acquire UE capability after the inter-RAT handover in response to the information that the received information is incomplete.
  • a new bit provided by the source GERAN can be detected at the target eNB, the detection indicating that the EUTRAN capability set provided during the handover preparation is not the full configuration and that the target eNB is recommended to acquire UE capabilities again.
  • the correct release can be indicated as below
  • target eNB After inter-RAT handover to EUTRAN, target eNB can decide whether it should acquire EUTRAN capabilities or not. If UE indicates rel8 or rel9 in the accessStratumRelease IE, target eNB does not need to acquire EUTRAN capabilities after the inter-RAT to EUTRAN handover. If UE indicates rel10 or later release in the accessStratumRelease IE, target eNB determines that it needs to acquire EUTRAN capabilities once inter-RAT handover from GERAN to EUTRAN succeeded.
  • the above examples provide advantage in that the size limitation of an earlier system does not necessarily prevent a later system from performing a handover.
  • Existing rules for example at E-UTRAN side for a handover can be kept, if needed.
  • Ambiguous situations in the target system that might cause faults or degrade performance may be avoided.
  • Advantage may thus be obtained in that handovers are more reliable and the target system will know when it should acquire more capability information.
  • the required data processing apparatus and functions of a radio access network, a communication device and any other appropriate station or element may be provided by means of one or more data processors.
  • the described functions at each end may be provided by separate processors or by an integrated processor.
  • the data processors may be of any type suitable to the local technical environment, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs), application specific integrated circuits (ASIC), gate level circuits and processors based on multi core processor architecture, as non limiting examples.
  • the data processing may be distributed across several data processing modules.
  • a data processor may be provided by means of, for example, at least one chip. Appropriate memory capacity can also be provided in the relevant devices.
  • the memory or memories may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory.
  • An appropriately adapted computer program code product or products may be used for implementing the embodiments, when loaded or otherwise provided on an appropriate data processing apparatus, for example for causing determinations when, what and where to communicate and communications of information between the various nodes.
  • the program code product for providing the operation may be stored on, provided and embodied by means of an appropriate carrier medium.
  • An appropriate computer program can be embodied on a computer readable record medium. A possibility is to download the program code product via a data network.
  • the various embodiments may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Embodiments of the inventions may thus be practiced in various components such as integrated circuit modules.
  • the design of integrated circuits is by and large a highly automated process. Complex and powerful software tools are available for converting a logic level design into a semiconductor circuit design ready to be etched and formed on a semiconductor substrate.

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  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur des procédés et des appareils de transfert de technologies d'accès inter radio d'un dispositif de communication ayant certaines capacités. Des informations de capacité pour le dispositif de communication sont communiquées du dispositif à un système source, les informations de capacité étant des informations de capacité incomplètes comprenant des informations d'un minimum prédéfini de capacités. Les informations de capacité incomplètes sont communiquées à un système d'accès cible. Le système d'accès cible est également informé du fait que des informations de capacité incomplètes lui sont fournies. Le système d'accès cible peut alors déterminer s'il existe ou non un besoin de davantage d'informations de capacité en réponse à l'information que les informations de capacité reçues sont incomplètes, et peut envoyer une requête d'informations de capacité au dispositif de communication.
PCT/EP2013/056113 2013-03-22 2013-03-22 Procédé de transfert de technologies d'accès inter radio avec informations de capacité incomplètes du terminal utilisateur Ceased WO2014146723A1 (fr)

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PCT/EP2013/056113 WO2014146723A1 (fr) 2013-03-22 2013-03-22 Procédé de transfert de technologies d'accès inter radio avec informations de capacité incomplètes du terminal utilisateur

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EP3509348A1 (fr) * 2018-01-09 2019-07-10 HTC Corporation Dispositif et procédé de gestion de nouvelles capacités radio
WO2021050213A1 (fr) * 2019-09-13 2021-03-18 Qualcomm Incorporated Réception d'informations de commande simultanée à partir de cellules source et cible pendant un transfert intercellulaire
CN116569571A (zh) * 2021-03-12 2023-08-08 华为技术有限公司 通信方法和通信装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3509348A1 (fr) * 2018-01-09 2019-07-10 HTC Corporation Dispositif et procédé de gestion de nouvelles capacités radio
CN110022585A (zh) * 2018-01-09 2019-07-16 宏达国际电子股份有限公司 处理新无线能力的装置及方法
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WO2021050213A1 (fr) * 2019-09-13 2021-03-18 Qualcomm Incorporated Réception d'informations de commande simultanée à partir de cellules source et cible pendant un transfert intercellulaire
US11240716B2 (en) 2019-09-13 2022-02-01 Qualcomm Incorporated Simultaneous control information reception from source and target cells during handover
CN116569571A (zh) * 2021-03-12 2023-08-08 华为技术有限公司 通信方法和通信装置

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