WO2019024545A1 - Procédé permettant à un ue de communiquer des informations pour aider une station de base à effectuer un changement d'état de rrc d'ue, terminal d'utilisateur et station de base - Google Patents

Procédé permettant à un ue de communiquer des informations pour aider une station de base à effectuer un changement d'état de rrc d'ue, terminal d'utilisateur et station de base Download PDF

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Publication number
WO2019024545A1
WO2019024545A1 PCT/CN2018/084016 CN2018084016W WO2019024545A1 WO 2019024545 A1 WO2019024545 A1 WO 2019024545A1 CN 2018084016 W CN2018084016 W CN 2018084016W WO 2019024545 A1 WO2019024545 A1 WO 2019024545A1
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rrc
state
base station
random access
auxiliary information
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PCT/CN2018/084016
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English (en)
Chinese (zh)
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李小龙
江鹏
王俊
刘永飘
余刚
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武汉虹信通信技术有限责任公司
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Publication of WO2019024545A1 publication Critical patent/WO2019024545A1/fr

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    • 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

  • the present invention relates to the field of 5G wireless communication technologies, and in particular, to a UE (User Equipment) reporting information to assist a base station to perform a UE RRC (Radio Resource Control) state transition.
  • UE User Equipment
  • RRC Radio Resource Control
  • a new UE RRC state that is, RRC INACTIVE, is defined relative to 4G LTE.
  • RRC INACTIVE For a UE in RRC inactive state, it has the following characteristics:
  • Mobility is achieved through cell reselection
  • the control plane and user plane connection of the UE's radio access network side to core network has been established (ie, there is a user plane and control plane connection similar to LTE S1);
  • At least one base station stores the context information of the access layer of the UE, that is, at least the control plane of the radio access network side to the core network (CN-NR RAN) of the UE and the base station connected to the user plane store the UE.
  • Access layer context information the UE also stores context information of the access layer;
  • a network side notification area is defined, and the NR RAN can initialize to send a paging (paging message) to the UE, so the network side notification area is managed by an NRRAN (Radio Access Network), and the NR RAN knows which network the UE belongs to. Side notification area.
  • NRRAN Radio Access Network
  • the UE listens to RAN paging and core network paging
  • the UE needs to perform a RAN side notification area and a CN (Core Network) tracking area update.
  • CN Core Network
  • the 5G has three RRC states, namely, RRC IDLE (RRC idle state), RRC Connected (RRC connected state), and RRC Inactive (RRC inactive state), and the corresponding RRC state transition also becomes more complicated.
  • RRC IDLE RRC idle state
  • RRC Connected RRC connected state
  • RRC Inactive RRC inactive state
  • the UE When the UE is in the RRC Inactive and RRC Idle states, the UE can save power, but the UE is more power-saving when it is in the RRC idle state.
  • the UE When the UE is in the RRC Inactive state, the UE can switch to the RRC Connected state more quickly than the UE is in the RRC Idle state. Therefore, the Inactive UE can reduce the delay of sending data and meet the requirements of different services.
  • the network requirements are higher because the network needs to save the access layer context of the UE and the control plane and user plane of the radio access network side to the core network (CN-NR RAN) that maintains the UE. connection.
  • 5G supports three RRC states, namely RRC IDLE, RRC Connected and RRC Inactive. And the RRC state of 5G supports mutual conversion between RRC Connected and RRC Inactive, and RRC Idle and RRC Connected are mutually converted.
  • RRC inactivity timer For LTE, for each RRC connected UE, the base station runs an RRC inactivity timer. If the timer expires, the base station can switch the UE to the RRC Idle state. However, for 5G, an RRC state is added, that is, RRC Inactive.
  • the timer base station still needs to determine whether to change the UE from the RRC Connected state to the RRC Inactive or RRC Idle state, but the base station is not currently sufficient. Information to determine whether to transition the UE from the RRC Connected state to the RRC Inactive or RRC Idle state.
  • An object of the present invention is to provide a technical solution for a UE to report information to assist a base station to perform UE RRC state transition.
  • the technical solution of the present invention provides a method for a UE to report a RRC state transition of a UE in a RRC idle state or an RRC inactive state, and an RRC state transition in an RRC idle state or an RRC inactive state to an RRC connected state.
  • the auxiliary information is reported to the base station in the process; the UE in the RRC connected state reports the auxiliary information to the base station in the RRC connected state; when the base station needs to switch the UE in the RRC connected state to the RRC idle state or the RRC inactive state, according to the UE
  • the previously reported auxiliary information is used to assist in deciding to transition the UE to the RRC idle state or the RRC inactive state.
  • the UE in the RRC idle state or the RRC inactive state reports the auxiliary information through the random access message 3MSG3 or the random access message 5MSG5 in the process of transitioning to the RRC connected state.
  • the auxiliary information is reported by the MSG3, and the implementation manner is as follows.
  • Step 1 If the UE in the RRC idle state or the RRC inactive state is to be switched to the RRC connected state, the UE initiates a random access procedure, including the UE sending a random access message 1MSG1 and the base station transmitting a random access message 2MSG2;
  • Step 2 The UE sends a random new access message 3MSG3, and reports the auxiliary information in the random access message 3MSG3.
  • Step 3 The base station sends a random access message 4MSG4, and the UE sends a random access message 5MSG5 and the UE successfully transits to the RRC connected state.
  • Step 4 After the UE transitions to the RRC connected state, when the base station needs to switch the UE in the RRC connected state to the RRC idle state or the RRC inactive state, the base station assists the base station to decide to convert the UE to the RRC according to the auxiliary information reported by the UE in the MSG3. Idle state or RRC inactive state.
  • the implementation manner is as follows.
  • Step 1 If the UE in the RRC idle state or the RRC inactive state is to be switched to the RRC connected state, the UE initiates a random access procedure, including the interaction between the UE and the base station, the random access message 1, the random access message 2, and the random access Access message 3 and random access message 4;
  • Step 2 The UE sends a random access message 5, and reports the auxiliary information in the random new access message 5.
  • Step 3 After the UE transitions to the connected state, when the base station needs to switch the UE in the RRC connected state to the RRC idle state or the RRC inactive state, the base station assists the base station to decide to convert the UE to the RRC idle according to the auxiliary information reported by the UE in the MSG5. State or RRC inactive state.
  • the UE in the RRC connected state reports the auxiliary information to the base station in the connected state, including reporting the auxiliary information through RRC or MAC or PHY signaling.
  • the UE in the RRC connected state reports the auxiliary information by using RRC or MAC or PHY signaling.
  • the UE reports the auxiliary information to the base station through RRC or MAC or PHY signaling.
  • the base station is assisted to decide to convert the UE to the RRC idle state or the RRC inactive state according to the auxiliary information reported by the UE in the RRC or MAC or PHY signaling. .
  • the auxiliary information reported by the UE includes some or all of the following contents.
  • the RRC state includes an RRC inactive state or an RRC idle state
  • the auxiliary information reported by the UE is accompanied by other reference messages, including the duration of the RRC inactivity timer recommended by the UE.
  • the state of the base station is prioritized, and then the UE is decided to switch to the RRC idle state or the RRC is inactive according to the auxiliary information reported by the UE. state.
  • the base station ignores the auxiliary information reported by the UE and switches the UE to the RRC idle state.
  • the present invention also provides a UE terminal, including the following modules,
  • the first auxiliary information reporting module is configured to report the auxiliary information to the base station in an RRC idle state or an RCC inactive state to an RRC connected state transition process when the RRC idle state or the RRC inactive state is used;
  • the second auxiliary information reporting module is configured to report the auxiliary information to the base station in the RRC connected state when the RRC connected state is used, and the receiving module is configured to: when the base station needs to switch the UE in the RRC connected state to the RRC idle state or the RRC inactive In the state, after the UE is assisted to decide to switch the UE to the RRC idle state or the RRC inactive state according to the auxiliary information reported by the UE, the indication of the base station is received, and the corresponding RRC state transition processing is performed.
  • the UE in the RRC idle state or the RRC inactive state reports the auxiliary information through the random access message 3MSG3 or the random access message 5MSG5 in the process of transitioning to the connected state.
  • the auxiliary information is reported by the random access message 3MSG3, and the implementation manner is as follows.
  • Step 1 the UE in the RRC idle state or the RRC inactive state is to be switched to the RRC connected state, and the UE initiates a random access procedure, including the UE transmitting the random access message 1MSG1 and the random access message 2MSG2 sent by the receiving base station;
  • Step 2 The UE sends a random new access message 3MSG3, and reports the auxiliary information in the random access message 3MSG3.
  • Step 3 Receive a random access message 4MSG4 sent by the base station, and the UE sends a random access message 5MSG5 and the UE successfully transits to the RRC connected state.
  • the auxiliary information is reported by the random access message 5MSG5, and the implementation manner is as follows.
  • Step 1 If the UE in the RRC idle state or the RRC inactive state is to be switched to the RRC connected state, the UE initiates a random access procedure, including the interaction between the UE and the base station, the random access message 1MSG1, the random access message 2MSG2, and the random access message. Access message 3MSG3 and random access message 4MSG4;
  • Step 2 The UE sends a random access message 5MSG5, and reports the auxiliary information in the random new access message 5MSG5.
  • the UE in the RRC connected state reports the auxiliary information to the base station in the RRC connected state, including reporting the auxiliary information through RRC or MAC or PHY signaling.
  • the auxiliary information reported by the UE includes some or all of the following contents.
  • the RRC state includes an RRC inactive state or an RRC idle state
  • the auxiliary information reported by the UE is accompanied by other reference messages, including the duration of the RRC inactivity timer recommended by the UE.
  • the invention also provides a base station, comprising the following modules,
  • a receiving module configured to receive auxiliary information reported by the UE to the base station, including the auxiliary information reported by the UE in the RRC idle state or the inactive state, and reported to the base station in the RRC idle state or the RRC inactive state to the RRC connected state transition process;
  • a state transition determining module configured to, when the base station needs to switch the UE in the RRC connected state to the RRC idle state or the RRC inactive state, to assist in determining to switch the UE to the RRC idle state or the RRC inactive according to the auxiliary information reported by the UE state.
  • the receiving of the auxiliary information reported by the random access message 3MSG3 in the process of the UE in the RRC idle state or the RRC inactive state is as follows:
  • Step 1 Receive a random access message 1MSG1 sent by the UE in the RRC idle state or the RRC inactive state during the transition to the RRC connected state;
  • Step 2 the base station sends a random access message 2MSG2;
  • Step 2 Receive a random new access message 3MSG3 sent by the UE, and the random access message 3MSG3 includes auxiliary information.
  • Step 3 The base station sends a random access message 4MSG4, receives the random access message 5MSG5 sent by the UE, and the UE successfully transits to the RRC connected state;
  • Step 4 After the UE transitions to the RRC connected state, when the base station needs to switch the UE in the RRC connected state to the RRC idle state or the RRC inactive state, the base station determines to assist the base station according to the auxiliary information reported by the UE in the random access message 3MSG3. The UE transitions to the RRC idle state or the RRC inactive state.
  • the method of receiving the auxiliary information reported by the random access message 5MSG5 in the process of the UE in the RRC idle state or the RRC inactive state is as follows:
  • Step 1 If the UE in the RRC idle state or the RRC inactive state is to be switched to the RRC connected state, the UE initiates a random access procedure, including the interaction between the UE and the base station, the random access message 1MSG1, the random access message 2MSG2, and the random access message. Access message 3MSG3 and random access message 4MSG4;
  • Step 2 Receive a random access message 5MSG5 sent by the UE, and the random new access message 5MSG5 includes auxiliary information.
  • Step 3 After the UE transitions to the connected state, when the base station needs to switch the UE in the RRC connected state to the RRC idle state or the RRC inactive state, the base station assists the base station to determine the UE according to the auxiliary information reported by the UE in the random access message 5MSG5. Switch to RRC idle state or RRC inactive state.
  • auxiliary information reported by the UE in the RRC connected state through RRC or MAC or PHY signaling is received.
  • the base station when the base station needs to switch the UE in the RRC connected state to the RRC idle state or the RRC inactive state, the base station is assisted by the base station to decide to switch the UE to the RRC idle state or according to the auxiliary information reported by the UE in the RRC or MAC or PHY signaling. RRC inactive state.
  • the auxiliary information reported by the received UE includes some or all of the following contents,
  • the RRC state includes an RRC inactive state or an RRC idle state
  • the auxiliary information reported by the UE is accompanied by other reference messages, including the duration of the RRC inactivity timer recommended by the UE.
  • the state of the base station is prioritized, and then the UE is decided to switch to the RRC idle state or the RRC is inactive according to the auxiliary information reported by the UE. state.
  • the base station ignores the auxiliary information reported by the UE and switches the UE to the RRC idle state.
  • the technical solution provided by the present invention enables the base station to have sufficient information to determine whether to convert the RRC connected state UE to the empty RRC idle state or the RRC inactive state; and the base station can fully consider the situation of the UE, thereby selecting to convert the UE to more Conducive to the RRC state of the UE.
  • the present invention is applicable to a UE that reports related information in a 5G NR and other communication systems, and assists the base station to perform RRC state transition on the UE.
  • the invention is based on the newly defined RRC state "RRC Inactive" of the 3GPP 5G standard, and solves the problem of determining the basis for determining whether to change the UE from the RRC Connected state to the RRC Inactive state or the RRC Idle state, and is important for China to lead the implementation of the 5G technical standard in the world. Practical significance, with significant market value.
  • FIG. 1 is a schematic view of a first embodiment of the present invention
  • Embodiment 2 is a schematic diagram of Embodiment 2 of the present invention.
  • FIG. 3 is a schematic diagram of Embodiment 3 of the present invention.
  • the technical solution of the present invention provides that the UE may report the auxiliary information to the base station in the RRC idle state/inactive state to the RRC connection state transition process, and the RRC connected state UE may report the auxiliary information to the base station in the RRC connected state.
  • the base station may assist the decision to switch to the RRC idle state or the RRC inactive state according to the information reported by the UE.
  • the present invention proposes that when the base station needs to switch the UE in the RRC connected state to the RRC idle state or the RRC inactive state, the state of the base station is prioritized, and then the UE is decided to switch to the RRC idle according to the auxiliary information reported by the UE. State or RRC inactive state.
  • the invention proposes the design of the reporting method of auxiliary information:
  • the RRC idle state/inactive state UE reports information through MSG3 (Random Access Message 3) or MSG5 (Random Access Message 5) in the process of transitioning to the RRC connected state;
  • the connected state UE reports information through RRC/MAC/PHY signaling
  • the base station When the base station needs to convert the RRC connected state UE to the RRC idle state or the RRC inactive state, the base station determines the RRC state of the UE according to the information reported by the UE or the base station according to the information reported by the UE and the load of the base station.
  • the present invention further proposes the design of the reported content, see the detailed description of the following embodiments.
  • Embodiment 1 is as follows:
  • the UE If the UE is in the RRC idle state or the RRC inactive state is to be switched to the RRC connected state, the UE initiates a random access procedure, including the UE transmitting the random access message 1 (MSG 1) and the base station transmitting the random access message 2 (MSG). 2).
  • the UE sends a random new access message 3 (MSG3), and reports the auxiliary information in the random access message 3.
  • the auxiliary information may include:
  • the RRC state recommended by the UE may be identified by 1 bit, 1 indicates that RRC Inactive is recommended, and 0 indicates that RRC Idle is recommended;
  • the target service type of the UE for example, the UE can report the service type of the target service type: URLLC (Ultra Reliable Low Latency Communication), eMBB (Enhance Mobile Broadband), and the like.
  • URLLC Ultra Reliable Low Latency Communication
  • eMBB Enhance Mobile Broadband
  • the power of the UE for example, the UE may indicate a low battery
  • One or more of the information may be provided during implementation.
  • the base station determines the RRC state of the UE according to the state of the base station and the state of the UE.
  • the random access message MSG3 may be an RRC Connection Request message and the like; if the UE transitions from the RRC inactive state to the RRC connection
  • the random access message MSG3 may be an RRC Connection Resume Request message and the like.
  • the base station transmits a random access message 4 (MSG4), and the UE transmits a random access message 5 (MSG5) and successfully transitions to the RRC connected state.
  • MSG4 random access message 4
  • MSG5 random access message 5
  • the base station may assist the base station to switch the UE to the RRC idle state or the RRC inactive state according to the information reported by the UE on the MSG3.
  • the base station converts the UE to the RRC inactive state, and if the RRC state recommended by the UE is the RRC idle state, the base station transits the UE to the RRC idle state;
  • the base station converts the UE to the RRC inactive state, and if the target service type reported by the UE is eMBB, the base station converts the UE to the RRC idle state;
  • the base station converts the UE to the RRC idle state, otherwise the base station converts the UE to the RRC inactive state;
  • the base station switches the UE to the RRC idle state, otherwise the base station switches the UE to the RRC inactive state.
  • the base station may randomly select the RRC state transition of the UE according to some auxiliary information, or the base station may preferentially perform the RRC state transition of the UE according to some auxiliary information.
  • the base station can preferentially consider the state of the base station, and then determine to switch the UE to the RRC idle state or the RRC inactive state according to the information reported by the UE in the MSG3; for example, the base station preferentially considers the load of the base station, and if the load is low, the UE reports the signal according to the UE.
  • the information is determined to convert the UE to the RRC idle state or the RRC inactive state; if the load is high, the base station may ignore the information reported by the UE and switch the UE to the RRC idle state.
  • a person skilled in the art may preset a load-related threshold to determine whether the load of the base station is lower or higher.
  • the base station instructs the UE to switch to the RRC idle state or the RRC inactive state, and the UE enters the RRC idle state or the RRC inactive state according to the indication of the base station.
  • the implementation of the second embodiment is as follows:
  • the UE If the UE is in the idle state or the inactive state, the UE initiates a random access procedure, including the interaction between the UE and the base station, the random access message, the random access message 2, and the random access message. And random access message 4;
  • the UE sends a random access message 5, and reports the auxiliary information in the random new access message 5 (MSG5).
  • the information may include:
  • the RRC state recommended by the UE may be identified by 1 bit, 1 indicates that RRC Inactive is recommended, and 0 indicates that RRC Idle is recommended;
  • the target service type of the UE for example, the UE can report the service type of the target service type: URLLC (Ultra Reliable Low Latency Communication), eMBB (Enhance Mobile Broadband), and the like.
  • URLLC Ultra Reliable Low Latency Communication
  • eMBB Enhance Mobile Broadband
  • the power of the UE for example, the UE may indicate a low battery
  • One or more of the information may be provided during implementation.
  • the base station determines the RRC state of the UE according to the state of the base station and the state of the UE.
  • the random access message MSG5 may be an RRC Connection Setup Complete message and the like; if the UE is in the RRC inactive state and transitions to the RRC connected state The random access message MSG5 may be an RRC Connection Resume Complete message and the like;
  • the base station may assist the base station to switch the UE to the RRC idle state or the RRC inactive state according to the information reported by the UE on the MSG5.
  • the base station may perform state transition of the UE according to the method as described in the first embodiment
  • the base station can preferentially consider the state of the base station, and then determine to convert the UE to the RRC idle state or the RRC inactive state according to the information reported by the UE on the MSG5; for example, the base station preferentially considers the load of the base station, and if the load is low, the UE reports the signal according to the UE.
  • the information is determined to convert the UE to the RRC idle state or the RRC inactive state; if the load is high, the base station may ignore the information reported by the UE and switch the UE to the RRC idle state.
  • the base station instructs the UE to switch to the RRC idle state or the RRC inactive state, and the UE enters the RRC idle state or the RRC inactive state according to the indication of the base station.
  • the implementation of the third embodiment is as follows:
  • the UE may report the information to the base station, and the reported information includes the first step in the first embodiment.
  • the UE may report the information by using RRC signaling, MAC layer signaling, and physical layer signaling.
  • the base station may assist the base station to switch the UE to the RRC idle state or the RRC inactive state according to the information reported by the UE in 1.
  • the base station can preferentially consider the state of the base station, and then determine to convert the UE to the RRC idle state or the RRC inactive state according to the information reported by the UE in 1; for example, the base station preferentially considers the load of the base station, and if the load is low, according to the UE The reported information is used to determine that the UE is switched to the RRC idle state or the RRC inactive state; if the load is high, the base station may ignore the information reported by the UE and switch the UE to the RRC idle state.
  • the base station instructs the UE to switch to the RRC idle state or the RRC inactive state, and the UE enters the RRC idle state or the RRC inactive state according to the indication of the base station.
  • computer software technology can be used to realize the automatic operation of each process.
  • the corresponding device can also be provided in a modular manner.
  • the present invention also provides a UE terminal, including the following modules,
  • the first auxiliary information reporting module is configured to report the auxiliary information to the base station in an RRC idle state or an RCC inactive state to an RRC connected state transition process when the RRC idle state or the RRC inactive state is used;
  • the second auxiliary information reporting module is configured to report the auxiliary information to the base station in the RRC connected state
  • the receiving module is configured to: when the base station needs to switch the UE in the RRC connected state to the RRC idle state or the RRC inactive In the state, after the UE is assisted to decide to switch the UE to the RRC idle state or the RRC inactive state according to the auxiliary information reported by the UE, the indication of the base station is received, and the corresponding RRC state transition processing is performed.
  • the invention also provides a base station, comprising the following modules,
  • a receiving module configured to receive auxiliary information reported by the UE to the base station, including the auxiliary information reported by the UE in the RRC idle state or the inactive state, and reported to the base station in the RRC idle state or the RRC inactive state to the RRC connected state transition process;
  • the state transition determining module is configured to, when the base station needs to switch the UE in the RRC connected state to the RRC idle state or the RRC inactive state, to assist in determining to switch the UE to the RRC idle state or the RRC inactive according to the auxiliary information reported by the UE. state.

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Abstract

La présente invention concerne un procédé permettant à un UE de communiquer des informations pour aider une station de base à effectuer un changement d'état de RRC d'UE, un terminal d'utilisateur et une station de base. Un UE dans un état de veille de RRC ou un état inactif de RRC communique des informations d'assistance à la station de base dans un processus de changement d'état de RRC de l'état de veille de RRC ou de l'état inactif de RRC à l'état connecté de RRC ; l'UE dans l'état connecté de RRC communique des informations d'assistance à la station de base dans l'état connecté de RRC ; lorsque la station de base doit faire passer l'UE dans l'état connecté de RRC à l'UE dans l'état de veille de RRC ou dans l'état inactif de RRC, les informations d'assistance communiquées par l'UE précédemment sont utilisées comme base pour aider la décision de faire passer l'UE à l'état de veille de RRC ou l'état inactif de RRC. Selon la solution technique décrite dans la présente invention, la station de base a la possibilité d'avoir des informations suffisantes pour déterminer de faire passer l'UE dans l'état connecté de RRC à l'état de veille de RRC ou à l'état inactif de RRC ; et la station de base peut considérer complètement la situation de l'UE pour choisir de faire passer l'UE à un état RRC plus avantageux pour l'UE.
PCT/CN2018/084016 2017-08-02 2018-04-23 Procédé permettant à un ue de communiquer des informations pour aider une station de base à effectuer un changement d'état de rrc d'ue, terminal d'utilisateur et station de base WO2019024545A1 (fr)

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