WO2023010491A1 - Cell identity determination - Google Patents

Cell identity determination Download PDF

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Publication number
WO2023010491A1
WO2023010491A1 PCT/CN2021/111057 CN2021111057W WO2023010491A1 WO 2023010491 A1 WO2023010491 A1 WO 2023010491A1 CN 2021111057 W CN2021111057 W CN 2021111057W WO 2023010491 A1 WO2023010491 A1 WO 2023010491A1
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WIPO (PCT)
Prior art keywords
cell identity
location
stored cell
indication
stored
Prior art date
Application number
PCT/CN2021/111057
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English (en)
French (fr)
Inventor
Xiang Xu
Ping Yuan
Original Assignee
Nokia Shanghai Bell Co., Ltd.
Nokia Solutions And Networks Oy
Nokia Technologies Oy
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 Nokia Shanghai Bell Co., Ltd., Nokia Solutions And Networks Oy, Nokia Technologies Oy filed Critical Nokia Shanghai Bell Co., Ltd.
Priority to CN202180101299.8A priority Critical patent/CN117796067A/zh
Priority to PCT/CN2021/111057 priority patent/WO2023010491A1/en
Publication of WO2023010491A1 publication Critical patent/WO2023010491A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/029—Location-based management or tracking services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/04—User notification, e.g. alerting and paging, for incoming communication, change of service or the like multi-step notification using statistical or historical mobility data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states

Definitions

  • Embodiments of the present disclosure generally relate to the field of telecommunication, and in particular, to devices, methods, apparatuses and computer-readable storage media for cell identity (ID) determination.
  • ID cell identity
  • IOT Internet of Things
  • NTN non-terrestrial network
  • CN core network
  • NB-IOT narrow band Internet of Thing
  • LTE Long Term Evolution
  • eMTC Enhanced Machine Type Communication
  • the NB-IOT/eMTC devices are cost sensitive and energy-sensitive. These devices are required to work for years without changing the battery, and usually transmit/receive a small size of application data (for example, 50 bytes) from every a few hours to every a few days.
  • example embodiments of the present disclosure provide devices, methods, apparatuses and computer-readable storage media for cell identity (ID) determination.
  • a first device comprising at least one processor and at least one memory including computer program code.
  • the at least one memory and the computer program code configured to, with the at least one processor, cause the first device to receive, from a second device, a first indication that a location of the second device is unchanged.
  • the first device is further caused to transmit, to a third device, a second indication that the location of the second device is unchanged and/or a stored cell identity for the second device is to be used.
  • a third device comprises at least one processor and at least one memory including computer program code.
  • the at least one memory and the computer program code configured to, with the at least one processor, cause the third device to receive, from a first device, a second indication that the location of the second device is unchanged and/or a stored cell identity for the second device is to be used.
  • the third device is further caused to perform management of the second device based on the stored cell identity.
  • a second device comprising at least one processor and at least one memory including computer program code.
  • the at least one memory and the computer program code configured to, with the at least one processor, cause the second device to, upon a need for exchanging data or signaling with a third device, determine whether a location of the second device is changed.
  • the second device is further caused to in accordance with a determination that the location of the second device is unchanged, transmit, to a first device, in a Radio Resource Control message, a first indication that the location of the second device is unchanged.
  • a method implemented in a first device receives, from a second device, a first indication that a location of the second device is unchanged.
  • the first device further transmits, to a third device, a second indication that the location of the second device is unchanged and/or a stored cell identity for the second device is to be used.
  • a method implemented in a third device receives, from a first device, a second indication that the location of the second device is unchanged and/or a stored cell identity for the second device is to be used.
  • the third device further performs management of the second device based on the stored cell identity.
  • a method implemented in a second device upon a need for exchanging data or signaling with a third device, the second device determines whether a location of the second device is changed; and in accordance with a determination that the location of the second device is unchanged. The second device further transmits, to a first device, in a Radio Resource Control message, a first indication that the location of the second device is unchanged.
  • an apparatus comprising means for performing the method according to any of the fourth to sixth aspects.
  • Fig. 1 illustrates a conventional cell identity determination in a new radio (NR) NTN
  • FIG. 2 illustrates an example environment in which example embodiments of the present disclosure can be implemented
  • FIG. 3 illustrates a signaling diagram for determining mapped cell ID of the second device according to example embodiments of the present disclosure
  • FIG. 4 illustrates a flowchart of an example method implemented at a second device in accordance with some example embodiments of the present disclosure
  • Fig. 5 illustrates a flowchart of an example method implemented at a first device in accordance with some example embodiments of the present disclosure
  • Fig. 6 illustrates a flowchart of an example method implemented at a third in accordance with some example embodiments of the present disclosure.
  • Fig. 7 is a simplified block diagram of a device that is suitable for implementing embodiments of the present disclosure.
  • the term “radio access network device” or “RAN device” refers to a device which is capable of providing or hosting a cell or coverage where a second device, for example a terminal device, can communicate with.
  • a first device include, but not limited to, a Node B (NodeB or NB) , an Evolved NodeB (eNodeB or eNB) , a next generation eNB (ng-eNB) , a ng-eNB-Central Unit (ng-eNB-CU) , a ng-eNB-Distributed Unit (ng-eNB-DU) , a next generation NodeB (gNB) , a gNB-Central Unit (gNB-CU) , a gNB-Distributed Unit (gNB-DU) , a Remote Radio Unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an Integrated Access and Backhaul (IAB) node,
  • terminal device refers to any device having wireless or wired communication capabilities.
  • Examples of the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs) , portable computers, tablets, wearable devices, internet of things (IoT) devices, Internet of Everything (IoE) devices, machine type communication (MTC) devices, device on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure/network, devices for Integrated Access and Backhaul (IAB) , or image capture devices such as digital cameras, gaming devices, music storage and playback appliances, or Internet appliances enabling wireless or wired Internet access and browsing and the like.
  • UE user equipment
  • PDAs personal digital assistants
  • portable computers tablets, wearable devices, internet of things (IoT) devices, Internet of Everything (IoE) devices, machine type communication (MTC) devices, device on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure/network, devices for Integrated
  • the “core network device” or “CN device” may include a network element or elements that may include core network functionality, and which provides connectivity with a further network, such as a telephone network and/or a data communications network (e.g., the Internet) .
  • a further network such as a telephone network and/or a data communications network (e.g., the Internet) .
  • core network functionality for the fifth generation (5G) may include access and mobility management function (s) (AMF (s) ) and/or user plane functions (UPF (s) ) and/or session management function (s) (SMF (s) ) .
  • AMF access and mobility management function
  • UPF user plane functions
  • SMF session management function
  • Such core network functionality for LTE may include MME (Mobility Management Entity) /SGW (Serving Gateway) functionality.
  • MME Mobility Management Entity
  • SGW Serving Gateway
  • circuitry used herein may refer to hardware circuits and/or combinations of hardware circuits and software.
  • the circuitry may be a combination of analog and/or digital hardware circuits with software/firmware.
  • the circuitry may be any portions of hardware processors with software including digital signal processor (s) , software, and memory (ies) that work together to cause an apparatus, such as a terminal device or a network device, to perform various functions.
  • the circuitry may be hardware circuits and or processors, such as a microprocessor or a portion of a microprocessor, that requires software/firmware for operation, but the software may not be present when it is not needed for operation.
  • the term circuitry also covers an implementation of merely a hardware circuit or processor (s) or a portion of a hardware circuit or processor (s) and its (or their) accompanying software and/or firmware.
  • the location of the RAN device (for example, a gNB) is static.
  • a specific cell ID used by a RAN device for example, the cell identity broadcasted over the air interface, corresponds to a fixed geographical area on earth.
  • the RAN device report the UE’s location as a cell identity to the core network, so that the CN device can perform the management, for example, Quality of Service (QoS) control, or policy control, or charging control, etc., based on the UE’s location.
  • QoS Quality of Service
  • UE user equipment
  • RAN radio access network
  • RAN radio access network
  • LEO Low-Earth Orbit
  • a specific cell ID used by an NTN RAN device, for example, the cell ID broadcasted over the air interface, may not correspond to a fixed geographical area on earth.
  • the RAN device performs a mapping to determine a cell ID (also referred to as “mapped cell identity” or “mapped cell ID” hereafter) that corresponds to a fixed geographical area on earth.
  • a cell ID also referred to as “mapped cell identity” or “mapped cell ID” hereafter
  • the RAN device determines a cell ID corresponds to a geographical area on the earth, based on the location information of the UE, and the RAN device transmits the mapped cell ID to a CN device for policy control and charging of the UE.
  • FIG. 1 illustrates a conventional cell identity mapping in new radio (NR) NTN.
  • a UE 120 transits from a RRC_IDLE state to a RRC_CONNECTED state.
  • the UE 120 sends UE location information to a RAN device 140 during or after a RRC establishment procedure.
  • the RAN device 140 determines a mapped cell ID corresponds to a fixed geographical area on earth, for the UE 120 based on the UE location information.
  • the RAN device 140 transmits the determined cell ID to the CN device 150.
  • the CN device 150 Upon the reception of the determined cell ID, the CN device 150 applies the management, for example, QoS control, policy control and charging control based on this cell ID. Without knowing the UE’s location, it is not possible for the CN device 150 to apply the location-based management. Thus, the mapped cell identity is very important in the NTN system.
  • the UE 120 needs to provide its location information to the RAN device 140 whenever it transits to the RRC_CONNECTED state.
  • the location information may occupy about 70 bits. This is not neglectable considering that the NB-IOT/eMTC device usually transmits a small size of application data (for example, 50 bytes) at a transition to the RRC_CONNECTED state.
  • an energy efficient approach is needed to support the mapped cell identity determination, especially, in a NB-IOT/eMTC NTN system.
  • Example embodiments of the present disclosure provide an efficient scheme to support the mapped cell identity determination.
  • the scheme will be described below by taking a terminal device, a RAN device and a CN device as examples.
  • a UE needs to exchange data and/or signaling with the CN device, for example, a UE transmits or receives data/signaling with the CN device upon or after transition to RRC_CONNECTED state, or a UE transmits or receives data/signaling to or from the CN device without entering a RRC_CONNECTED state
  • the terminal device determines whether a location of the terminal device is changed. If it is determined that the location of the terminal device is unchanged, the terminal device transmits an indication that the location of the terminal device is unchanged to a RAN device, for example, in a Radio Resource Control (RRC) message.
  • RRC Radio Resource Control
  • the RAN device receives the indication that the location of the terminal device is unchanged from the terminal device, and transmits an indication that the location of the terminal device is unchanged and/or a stored cell ID for the terminal device is to be used to a CN device.
  • the CN device receives the indication that the stored cell identity for the terminal device is to be used from the RAN device. Then, the CN device performs management of the terminal device based on the stored cell ID.
  • signaling overhead between the devices may be reduced, and the energy consumption of the devices may be reduced.
  • FIG. 2 illustrates an example environment 200 in which example embodiments of the present disclosure can be implemented.
  • the environment 200 which may be a part of a communication network, comprises three devices, referred to as a first device 210 and a second device 220 and a third device 230, respectively.
  • the first device 210 operates as a RAN device and comprises a ground station 212 having baseband functionality part and a satellite 214 having radio frequency (RF) functionality part.
  • the satellite 214 may be a drone or other aviation devices and other aerospace devices.
  • the functionalities of the RAN device can also be arbitrarily divided between the satellite 214 and the ground station 212 as demanded.
  • the ground station 212 may host the non-NTN infrastructure functionality part of a RAN device
  • the satellite 214 may host the RF functionality part of a RAN device.
  • the ground station 212 may host the functionality part of a Central Unit of a RAN device (for example, a gNB-CU, or a ng-eNB CU)
  • the satellite 214 may host the functionality part of a Distributed Unit of a RAN device (for example, a gNB-DU, or a ng-eNB-DU)
  • the satellite 214 may host the whole functionality of a RAN device (for example, a gNB or a ng-eNB) .
  • the second device 220 is stationary and thus may observe IDs of different Uu cells 245 and 246 over the air at different time with the movement of the satellite 214.
  • a cell ID (or a mapped cell ID) corresponds to a fixed geographical area 255
  • another cell ID or another mapped cell ID) corresponds to a different geographical area 256.
  • first, second and third devices 210, 220 and 230 may be implemented by any other suitable devices and in any other suitable structures.
  • the first and second devices 210 and 220 may both implemented by terminal devices that can communicate directly from each other, and the third device 230 may operate as a RAN device.
  • the communications in the environment 200 may follow any suitable communication standards or protocols, which are already in existence or to be developed in the future, such as Universal Mobile Telecommunications System (UMTS) , long term evolution (LTE) , LTE-Advanced (LTE-A) , the fifth generation (5G) New Radio (NR) , Wireless Fidelity (Wi-Fi) and Worldwide Interoperability for Microwave Access (WiMAX) standards, and employs any suitable communication technologies, including, for example, Multiple-Input Multiple-Output (MIMO) , Orthogonal Frequency Division Multiplexing (OFDM) , time division multiplexing (TDM) , frequency division multiplexing (FDM) , code division multiplexing (CDM) , Bluetooth, ZigBee, and machine type communication (MTC) , enhanced mobile broadband (eMBB) , massive machine type communication (mMTC) , ultra-reliable low latency communication (URLLC) , Carrier Aggregation (CA) , Dual Connection (DC) , and
  • the second device 220 determines whether a location of the second device 220 is changed. If it is determined that its location is unchanged, the second device transmits to the first device 210 an indication that the location of the second device 220 is unchanged.
  • the first device 210 then transmits to the third device 230 an indication that the location of the second device 220 is unchanged and/or a stored cell identity for the second device 220 is to be used for management of the second device 220.
  • the stored cell identity for the second device 220 may be a mapped cell ID corresponds to the fixed geographical area 255. In this way, the location related signaling overhead may be reduced significantly.
  • FIG. 3 illustrates a signaling process 300 between the first, second and third devices 210, 220 and 230 according to example embodiments of the present disclosure.
  • the second device 220 determines (305) whether its location is changed. For example, the second device 220 may need to transmit or receive data and/or signaling to or from the third device 230 upon or after transition to a connected state.
  • the transition to the connected state may be a transition from a RRC_IDLE state to a RRC_CONNECTED state.
  • the transition to the connected state may be a transition from a RRC_INACTIVE state to the RRC_CONNECTED state.
  • the transition to the connected state may be a transition from any idle/un-active state to a connected state.
  • the transmission or reception of data and/or signaling may not require a transition to RRC_CONNECTED state.
  • the second device 220 may transmit or receive data and/or signaling to or from the third device 230 without entering a RRC_CONNECTED state.
  • the early data transmission EDT
  • the EDT enables (for mobile-originated data) a UE to transfer a small amount of data in msg3 of the Random Access procedure. If the transmission is successful, the UE will not move to RRC Connected mode, but return to RRC Idle (sleep) .
  • the second device 220 may initiate EDT without entering a RRC_CONNECTED state. In this situation, the second device 220 may determine whether its location is changed.
  • the second device 220 may determine a change of its location in any suitable rules or criteria. For example, if the second device 220 does not move and remains at the same location, the location of the second device 220 may be determined to be unchanged. Alternatively or in addition, if the current location of the second device 220 is very close to the previous location, the location of the second device 220 may be determined to be unchanged. For example, if the distance between the current and previous locations is very small, for example, below a threshold distance, it may be determined that the location of the second device 220 is not changed.
  • the threshold distance may be predefined or adjusted adaptively as needed. The threshold distance may be preconfigured in the second device 220, or received from the first device 210 via RRC message, or received from the third device 230.
  • the previous location is the location where the second device 220 performed the last transmission of data (for example, the second device 220 performed transmission of data upon or after transitioned to RRC_CONNECTED state, or the second device 220 performed transmission of data without entering RRC_CONNECTED state) , or the location where the second device 220 performed the last transmission of signaling without the transmission of data (for example, the second device 220 performed registration with the third device 230, without transmission of data) , or the location where the second device 220 performed the last transmission of signaling and data.
  • the location of the second device 220 may be determined to be unchanged.
  • the same geographic area may be the area which employs the same QoS control, policy control or policy charging.
  • the information of the geographic area may be predefined or adjusted adaptively as needed.
  • the information of the geographic area may be preconfigured in the second device 220, or received from the first device 210 via RRC message, or received from the third device 230.
  • the second device 220 determines that the location of second device 220 is unchanged, the second device 220 transmits to first device 210 in a RRC message an indication (referred to as a first indication) that the location of second device 220 is unchanged.
  • the second device 220 may inform the first device 210 of the first indication in other messages or in other explicit and implicit manners.
  • the second device 220 may provide its location information to the first device 210 using only one bit. For example, bit “1” indicates that the location of the second device 220 is unchanged, and bit “0” indicates that the location of the second device 220 is changed, or vice versa. Thus, the second device 220 only need to provide the one-bit indication, rather the full location information (for example, 70 bits) to the first device 210. This is big air interface resource saving for a second device 220 when it is stationary or does not move frequently. In some embodiments, if the second device 220 determines that its location is changed, the second device 220 may not transmit the one-bit indication, but transmit its current location information to implicitly indicate that its location is changed, so as to further decrease signaling overhead.
  • the first device 210 receives (315) the first indication that the location of second device 220 is unchanged.
  • the first indication may be received by the first device 210 from the second device 220 in a Radio Resource Control message, or other messages, or in other explicit and implicit manners.
  • the first device 210 transmits an indication (referred to as a second indication) to third device 230 that the location of the second device 220 is unchanged and/or stored cell identity for the second device 220 is to be used. Thereby, the first device 210 may directly skip the mapped cell identity determination procedure based on the received first indication. Therefore, with the first indication indicating the location of the second device 220 is unchanged, the first device 210 may save the computing and storage resources for determining the mapped cell ID.
  • an indication referred to as a second indication
  • the third device 230 receives (335) the second indication from the first device 210, and performs (345) management of the second device 220 based on the stored cell identity for the second device 220.
  • the management of the second device 220 comprises policy control, charging control, or any other control or management.
  • the third device 230 may perform (345) the management of the second device 220 by the steps of: the third device 230 retrieves the stored cell ID from a stored context for the second device 220, and use the retrieved cell ID for the management of the second device 220.
  • the context may be created and stored by the third device 230 locally for the second device 220 during a previous (or last) transmission related to the second device 220, for example, during the previous transmission of data and/or signaling between the second device 220 and the third device 230, during the previous registration (or registration update) procedure of the second device 220 with the third device 230, during the previous attach or tracking area update procedure of the second device 220 with the third device 230, during the last transition to RRC_CONNECTED state for data or signaling transmission, etc.
  • the third device 230 may perform policy control or policy charging for the second device 220.
  • the stored cell ID may be the cell ID of the last known mapped cell for the second device 220.
  • the first device 210 may determine the mapped cell ID based on the location received from the second device 220, and inform the third device 230 of the mapped cell ID. Then, the third device 230 may store the cell ID for the second device 220 in the context for the second device 220.
  • the third device 230 transmits (355) the stored cell ID to the first device 210 for use in location related processing or for other purposes.
  • the transmission of the stored cell ID may be triggered (355) by a request (referred to as a first request) for the stored cell ID from first device 210.
  • the third device 230 may receive the first request for the stored cell ID from first device 210, and in response to the first request, the third device 230 transmits (355) the stored cell ID to first device 210.
  • the first request may be transmitted when the first device 210 transmit the second indication to the third device 230.
  • the third device 230 may not have store cell ID for second device 220.
  • the second device 220 may be registered with the third device 230, but there is no communication between the second device 220 and the third device 230 for a long period of time.
  • the third device 230 may implicitly de-register the second device 220.
  • it may the first time that the second device 220 initiate the communication with the third device 230, and the third device 230 does not have a stored context for the second device 220.
  • the third device 230 may determine that the stored cell identity is unavailable. Accordingly, the third device 230 may transmit (365) a request (referred to as a second request) for a new cell identity for the second device 220.
  • the first device 210 may transmit (375) to the second device 220 a request for location information of the second device 220 (referred to as a third request) to the second device 220.
  • the first device 210 informs (375) the second device 220 to provide the location information.
  • the first device 210 may generate a mapped cell ID based on the location information from the second device 210 and send the mapped cell ID to the third device 230, as discussed above with reference to FIG. 1.
  • FIG. 4 illustrates a flowchart of an example method 400 implemented at the second device 220 in accordance with some example embodiments of the present disclosure.
  • the second device 220 determines whether a location of the second device 220 is changed.
  • the second device 220 may determine a change of its location in any suitable rules or criteria.
  • the second device 220 may determine that the location of the second device 220 is unchanged.
  • the second device 220 transmits, to the first device 210, in a Radio Resource Control message, a first indication that the location of the second device 220 is unchanged.
  • the information on whether the location of the second device 220 is changed may be provided to the first device 210 explicitly and flexibility.
  • FIG. 5 illustrates a flowchart of an example method 500 implemented at the first device 210 in accordance with some example embodiments of the present disclosure.
  • the first device 210 receives a first indication that a location of the second device 220 is unchanged from second device 220.
  • the first indication may only have a one-bit size which is much smaller than a size of the full location information (such as 70 bits) .
  • the first device 210 receives the first indication from the second device 220 in a Radio Resource Control message. In this way, the overhead of signaling is reduced significantly.
  • the first device 210 transmits to the third device 230 a second indication that the location of the second device 220 is unchanged and/or a stored cell ID for the second device 220 is to be used.
  • the stored cell ID for the second device 220 may be the last known mapped cell identity for the second device 220.
  • this stored cell ID may be the last known mapped ID reported by the first device 210 during the previous registration procedure or data/signaling exchange with the second device 220.
  • the first device 210 may directly skip the mapped cell ID determination procedure, and send the second indication to the third device 230. Thereby, the first device 210 may save the computing and storage resources for determining the mapped cell ID.
  • the first device 210 may receive the stored cell ID for the second device 220 from the third device 230.
  • the stored cell ID may be received in response to a first request for the stored cell identity from the first device 210 to the third device 230.
  • the third device 230 may de-register the second device 220 implicitly and clear the stored context for the second device 220, due to there is no communication from the second device 220 for a long period of time.
  • the first device 210 may receive from the third device 230 a second request for a new cell ID for the second device 220. Then, the first device 210 transmits to the second device 220 a third request for location information of the second device 220. Then, the first device 210 may generate a mapped cell ID based on the location information from the second device 210 and send the mapped cell ID to the third device 230.
  • FIG. 6 illustrates a flowchart of an example method 600 implemented at the third device 230 in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the method 600 will be described with reference to FIG. 2.
  • the third device 230 receives from the first device 210 a second indication that the location of the second device 220 is unchanged and/or a stored cell ID for the second device 220 is to be used.
  • the third device 230 may retrieve the stored cell identity from a stored context for second device 220. Then, the third device 230 may use the retrieved cell ID for the management of the second device 220.
  • the context may be created and stored by the third device 230 locally for the second device 220 after a previous RRC establishment procedure of the second device 220.
  • the stored cell ID for second device 220 may be the cell ID of the last known cell for the second device 220.
  • this stored cell ID may be the last known mapped ID reported by the first device 210 during the previous RRC establishment procedure.
  • the third device 230 performs management of second device 220 based on the stored cell ID.
  • the management of the second device 220 comprises QoS control, policy control, charging control, or any other control or management.
  • the third device 230 may transmit the stored cell ID to the first device 210. For example, after receiving the second indication, the third device 230 may transmit the stored cell ID to the first device 210 automatically.
  • the third device 230 may receive a first request for the stored cell ID from the first device 210. As a response to the first request, the third device 230 may transmit the stored cell ID to the first device 210.
  • the third device 230 may transmit to the first device 210 a second request for a new cell identity for the second device 220. Then, the first device 210 will transmit to the second device 220 a third request for current location information of the second device 220. In some example embodiments, the first device 210 informs the second device 220 to provide the location information. Then, the first device 210 may generate a mapped cell ID based on the location information from the second device 210 and send the mapped cell ID to the third device 230, as discussed above with reference to FIG. 1.
  • the methods 400, 500 and 600 may include additional acts not shown and/or may omit some shown acts, and the scope of the present disclosure is not limited in this regard. It is also to be understood that all operations and features as described above with reference to FIGS. 2 and 3 are likewise applicable to the methods 400, 500 and 600 and have similar effects. For the purpose of simplification, the details will be omitted.
  • FIG. 7 is a simplified block diagram of a device 700 that is suitable for implementing example embodiments of the present disclosure.
  • the device 700 can be implemented at the first device 210, the second device 220 or the third device 230 as shown in FIG. 2.
  • the device 700 includes a processor 710, a memory 720 coupled to the processor 710, a communication module 730 coupled to the processor 710, and a communication interface (not shown) coupled to the communication module 730.
  • the memory 720 stores at least a program 740.
  • the communication module 730 is for bidirectional communications, for example, via multiple antennas or via a cable.
  • the communication interface may represent any interface that is necessary for communication.
  • the program 740 is assumed to include program instructions that, when executed by the associated processor 710, enable the device 700 to operate in accordance with the example embodiments of the present disclosure, as discussed herein with reference to FIGS. 1 to 6.
  • the example embodiments herein may be implemented by computer software executable by the processor 710 of the device 700, or by hardware, or by a combination of software and hardware.
  • the processor 710 may be configured to implement various example embodiments of the present disclosure.
  • the memory 720 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 720 is shown in the device 700, there may be several physically distinct memory modules in the device 700.
  • the processor 710 may be of any type suitable to the local technical network, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples.
  • the device 700 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
  • the processor 710 may implement the operations or acts of the first device 210 as described above with reference to FIGS. 2-3 and 5.
  • the processor 710 may implement the operations or acts of the second device 220 as described above with reference to FIGS. 2-3 and 4.
  • the processor 710 may implement the operations or acts of the third device 230 as described above with reference to FIGS. 2-3 and 6. All operations and features as described above with reference to FIGS. 1 to 6 are likewise applicable to the device 700 and have similar effects. For the purpose of simplification, the details will be omitted.
  • various example embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of example embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representations, it is to be understood that the block, apparatus, system, technique or method described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
  • the present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium.
  • the computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the operations and acts as described above with reference to FIGS. 1 to 6.
  • program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types.
  • the functionality of the program modules may be combined or split between program modules as desired in various example embodiments.
  • Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
  • Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowcharts and/or block diagrams to be implemented.
  • the program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
  • the computer program codes or related data may be carried by any suitable carrier to enable the device, apparatus or processor to perform various processes and operations as described above.
  • Examples of the carrier include a signal, computer readable media.
  • the computer readable medium may be a computer readable signal medium or a computer readable storage medium.
  • a computer readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing.
  • the computer readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , Digital Versatile Disc (DVD) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
  • RAM random access memory
  • ROM read-only memory
  • EPROM or Flash memory erasable programmable read-only memory
  • CD-ROM compact disc read-only memory
  • DVD Digital Versatile Disc
  • an optical storage device a magnetic storage device, or any suitable combination of the foregoing.
  • a second device comprises at least one processor; and at least one memory including computer program code; and the at least one memory and the computer program code configured to, with the at least one processor, cause the second device to upon a need for exchanging data or signaling with a third device, determine whether a location of the second device is changed; and in accordance with a determination that the location of the second device is unchanged, transmit, to a first device, in a Radio Resource Control message, a first indication that the location of the second device is unchanged.
  • a first device comprises at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the first device to receive, from a second device, a first indication that a location of second device is unchanged; and transmit, to a third device, a second indication that the location of the second device is unchanged and/or a stored cell identity for second device is to be used.
  • the first device is caused to receive the first indication by: receiving the first indication from a second device in a Radio Resource Control message.
  • the first device is further caused to receive the stored cell identity from the third device.
  • the first device is caused to receive the stored cell identity from the third device 230 by: transmitting, to the third device, a first request for the stored cell identity; and in response to transmitting the first request, receiving the stored cell identity from the third device.
  • the first device is further caused to receive, from the third device, a second request for a new cell identity for the second device 220; and in response to receiving the second request, transmit, to the second device, a third request for location information of the second device.
  • the stored cell identity for the second device is the cell identity of the last known cell for the second device.
  • a third device comprises at least one processor and at least one memory including computer program code; and the at least one memory and the computer program code configured to, with the at least one processor, cause the third device to receive, from a first device, a second indication that the location of the second device is unchanged and/or a stored cell identity for a second device is to be used; and perform management of the second device based on the stored cell identity.
  • the third device is caused to perform the management of the second device by: retrieving the stored cell identity from a stored context for the second device; and using the retrieved cell identity for management of the second device.
  • the third device is further caused to transmit the stored cell identity to the first device.
  • the third device is caused to transmit the stored cell identity to the second device by: receiving, from the first device, a first request for the stored cell identity; and in response to receiving the first request, transmitting the stored cell identity to the first device.
  • the third device is further caused to in accordance with a determination that the stored cell identity is unavailable, transmit, to the first device, a second request for a new cell identity for the second device.
  • the stored cell identity for the second device is the cell identity of the last known cell for the second device.
  • an apparatus implemented in a second device comprises: means for upon a need for exchanging data or signaling with a third device, determining whether a location of the second device is changed; and means for in accordance with a determination that the location of the second device is unchanged, transmitting, to a first device, in a Radio Resource Control message, a first indication that the location of the second device is unchanged.
  • an apparatus implemented in a first device comprises: means for receiving, from the second device, a first indication that a location of the second device is unchanged; and means for transmitting, to a third device, a second indication that the location of the second device is unchanged and/or a stored cell identity for the second device is to be used.
  • the apparatus further comprises: means for receiving the first indication from the second device in a Radio Resource Control message.
  • the apparatus further comprises: means for receiving the stored cell identity from the third device.
  • the apparatus further comprises: means for transmitting, to the third device, a first request for the stored cell identity; and means for in response to transmitting the first request, receiving the stored cell identity from the third device.
  • the apparatus further comprises: means for receiving, from the third device, a second request for a new cell identity for the second device; and means for in response to receiving the second request, transmitting, to the second device, a third request for location information of the second device.
  • the stored cell identity for the second device is the cell identity of the last known cell for the second device.
  • an apparatus implemented in a third device comprises: means for receiving, from a first device, a second indication that the location of the second device is unchanged and/or a stored cell identity for the second device is to be used; and means for performing management of the second device based on the stored cell identity.
  • the apparatus further comprises: means for retrieving the stored cell identity from a stored context for the second device; and means for using the retrieved cell identity for the management of the second device.
  • the apparatus further comprises: means for transmitting the stored cell identity to the first device.
  • the apparatus further comprises: means for receiving, from the first device, a first request for the stored cell ID; and means for in response to receiving the first request, transmitting the stored cell identity to the first device.
  • the apparatus further comprises: means for in accordance with a determination that the stored cell identity is unavailable, transmitting, to the first device, a second request for a new cell identity for the second device.
  • the stored cell identity for the second device is the cell identity of the last known cell for the second device.
  • a computer-readable storage medium having instructions stored thereon, the instructions, when executed on at least one processor, cause the least one processor to perform the steps of the preceding aspects.

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