RU2789775C1 - Method for increasing terminal response rate to page messages and terminal - Google Patents

Abstract

FIELD: wireless communication.

SUBSTANCE: invention relates to wireless communication. The method comprises: camping by a UE in a first cell of a first communication network, where the UE is in an RRC connected state; when the first predetermined condition is satisfied, transmitting by the access network device a first message to the UE, where the first message is used to indicate that the UE should transition to an RRC sleep state; registering by the access network device that the UE is in an RRC idle state; and in response to the received first message, transition by the UE to the RRC sleep state; and when the second predetermined condition is satisfied, camping by the UE in the second cell of the first communication network where the UE is in the RRC dormant state.

EFFECT: increasing the user equipment (UE) response rate to the paging message.

11 cl, 10 dwg

Description

The field of technology to which the invention relates

The present invention relates to the field of terminal technology and, in particular, to a method for increasing the speed of a terminal's response to paging messages and a terminal with such an accelerated response.

State of the art

In systems using New Radio (NR) technology, to reduce signaling overhead and power consumed by user equipment (User equipment, UE), a state intermediate between the “inactive” state of radio resource control control (Radio Resource Control) has been introduced. , RRC) (in other words, the RRC_IDLE state) and the connected RRC state (in other words, the RRC_CONNECT state), i.e. RRC inactive state (in other words, RRC_INACTIVE).

When the UE is in the RRC_INACTIVE state, from the point of view of the core communication network (CoreNetwork, CN), the UE maintains a connection management connected state (CM-CONNECTED) with respect to the core communication network. In this case, the gNB with which the UE last connected saves the UE context and new generation (NG) connections with the access and mobility management function (AMF)/user plane function (UPF) . The gNB with which the UE last connected belongs to the fifth generation (5G) access network (NG-RAN). Therefore, when the UE switches from the RRC_INACTIVE state to the RRC_CONNECT state, only the connection between the UE and the gNB needs to be restored without involving the core communication network, so that the amount of signaling between the UE and the CN can be significantly reduced.

Similar to the RRC_IDLE state, the UE has low power consumption when the UE is in the RRC_INACTIVE state. However, it should be noted that when the UE is in the RRC_IDLE state, the communication network side stores the Tracking Area Identity (TAI) of the UE, but does not store the serving cell ID for this UE, so that when the network side needs to deliver service data to the UE, the side the network needs to send a core network paging message (CN Paging) to find the UE in the TA. Similarly, when the UE is in the RRC_INACTIVE state, the NG-RAN stores a RAN-based notification area (RNA) identifier for the UE, but does not store a serving cell identifier for the UE. When the network side needs to transmit the service data of the UE, the network side first sends a paging message to the radio access network (RAN), i.e. (RAN Paging) using NG-RAN to search for UEs in the RNA region. This RNA region is included in the TA region, which means the fact that the RNA region is smaller than the TA region.

In some scenarios, the actual state of the UE may be inconsistent with the state of the UE registered on the network side. For example, the state of the UE registered on the network side is the RRC_INACTIVE state, but this UE may enter the idle mode (hereinafter, camp) in the NR cell again after disconnecting from the communication network or selecting another system and switch to the RRC_IDLE state. When the UE needs to transmit uplink data, based on the registered state of the UE (RRC_INACTIVE state), the network side needs to first send a RAN Paging message using the NG-RAN network. Since the UE is very likely to be outside the RAN Paging RNA region, the UE may not respond to the RAN Paging message. The network side transmits the CN Paging network paging message only after the NG-RAN has timed out the delivery of the RAN Paging message or after a predetermined number of attempts have been made. The UE may then switch from the RRC_IDLE state to the RRC_CONNECT state in response to the CN Paging message and receive data delivered by the network side. Therefore, when the actual state of the UE is not consistent with the state of the UE registered by the network side, the UE reacts slowly to the paging message from the network side, resulting in poor quality of service for the user.

The essence of the invention

The present application proposes a method for increasing the speed of a terminal's response to paging messages and a terminal with such an accelerated response that can avoid inconsistency between the actual state of the UE and the state of the UE stored on the network side, and increase the speed of the terminal's response to page messages from the network side.

In order to achieve the above objectives, the embodiments of the present invention offer the following technical solutions.

According to a first aspect, a method is provided for increasing a UE's response rate to paging messages. The method comprises: camping, by a UE, in a first cell of a first communication network, where the UE is in an RRC connected state; when the first predetermined condition is met, transmission, by the device from the access network, of the first message to the equipment of the specified UE, where this first message is used to indicate to that UE that it should enter the RRC sleep state; registering, by said access network device, that the UE is in an RRC idle state; and in response to receiving the first message, transitioning that UE to the RRC sleep state; and when the second predetermined condition is met, camping by the UE, in the second cell of the first network, where the UE is in the RRC idle state, and the first cell and the second cell are the same cell or different cells.

For example, the first predetermined condition is that no data transmission between the UE and the access network is detected. For example, the second predetermined condition is that: it is determined that the signal from the first cell does not meet the cell stick condition; or the UE has restarted; or the UE activates the flight mode and then exits this mode.

This means that after the access network device indicates to the UE that it should transition to the RRC idle state, that UE does not automatically transition to the RRC idle state, or immediately transitions to the RRC idle state after transitioning to the RRC idle state. In such a case, the actual state of the UE is consistent with the state of that UE registered with the access network device. Then, when the device initiates RAN paging based on the registered state of the UE, the UE can also respond quickly. This avoids the situation in which, when the access network device initiates a RAN paging message based on the registered state of the UE, the UE has to wait to respond until the CN paging message is initiated after a predetermined timeout or a predetermined number of attempts has elapsed. Therefore, the method provided by the embodiments of the present application helps to increase the UE's response rate to a paging message and improve the user's quality of service.

In one possible implementation, the procedure for camping by the UE in the second cell of the first communication network, when the second predetermined condition is met, and while the UE is in the RRC idle state, comprises: after the second predetermined condition is met, camping by the UE, first in the third cell the second communication network and then in the second cell of the first communication network where the UE is in the RRC dormant state.

In the conventional technique, when a UE detaches from the first cell of the communication network and camps on the third cell of the second communication network, that UE automatically enters the RRC idle state. When the UE camps on the second cell of the first communication network again, the UE is still in the RRC idle state. However, in embodiments of the present application, when the UE camps in the second cell of the first communication network again, that UE is in the RRC dormant state, which is consistent with the state of this UE registered by the access network device at that time.

In one possible implementation, the camping procedure by the UE in the second cell of the first communication network, when the second predetermined condition is met, where the UE is in the RRC idle state, further comprises: when the UE determines that the first cell signal satisfies the cell reselection criterion, this UE reselects first the third cell of the second communication network and then the second cell of the first communication network, where the UE is in the RRC dormant state and the type of the second communication network is different from that of the first communication network.

In the conventional technique, when the UE reselects the third cell of the second communication network, that UE automatically enters the RRC idle state. When the UE camps in the second cell of the first communication network again, the UE is still in the RRC idle state. However, in embodiments of the present application, when the UE camps in the second cell of the first communication network again, that UE is in an RRC dormant state that is consistent with the state of this UE registered with the access network device at that time.

In one possible implementation, the procedure for camping by the UE in the second cell of the first communication network when the second predetermined condition is met, where the UE is in the RRC idle state, comprises: when the second predetermined condition is met, camping by the UE in the second cell of the first communication network where this UE does not transition to the RRC idle state; or when this second predetermined condition is met, camping by the UE in the second cell of the first communication network and transitioning to the RRC idle state and then to the RRC idle state. Thus, two methods have been proposed to keep the UE in the RRC idle state.

In one possible implementation, after the UE has camped in the second cell of the first communication network and while the UE is in an RRC idle state, the method further comprises: in response to the first RAN paging message sent by the access network device and received by the UE, resuming, by the UE, the RRC connection with the access network device, and switching from the RRC dormant state to the RRC connected state.

In the RRC dormant state, the UE may quickly respond to the first RAN paging message. However, in the conventional technique, after automatically transitioning to the RRC idle state, the UE cannot respond to the first RAN paging message until the network side transmits the CN paging message. Therefore, embodiments of the present application increase the speed of the UE's response to a paging message.

In one possible implementation, the method further comprises: when the UE camps on the second cell of the first communication network and the UE is in an RRC dormant state, transmitting, by the UE, a registration request to the access network device; and responding to receiving a registration success response received from the access network device, erasing, by the UE, the UE context related to that UE in the RRC idle state and transitioning to the RRC idle state.

In other words, when the UE is in the RRC dormant state in the first communication network, after receiving a response indicating that the UE has successfully registered with the first communication network again, said UE may not remain in the RRC dormant state, but enter the RRC idle state. This creates a way for the UE to wake up from the RRC dormant state in the first communication network.

In one possible implementation, the method further comprises: when the UE camps on the second cell of the first communication network and the UE is in the RRC idle state, receiving, by the UE, a second message transmitted by the access network device, where this second message is used to indicate the UE go to RRC waiting state; and erasing, by the UE, the UE context related to that UE in the RRC idle state and switching to the RRC idle state.

In other words, when the UE is in the RRC dormant state in the first communication network, after receiving an instruction from the network side to enter the RRC idle state, the UE may not remain in the RRC dormant state, but enter the RRC idle state. This creates another way to allow the UE to wake up from the RRC dormant state in the first communication network.

In one possible implementation, the indication for entering the RRC idle state comprises a cancel signaling and a paging message from the core communication network, where the cancel signaling does not contain a suspend configuration.

In one possible implementation, when the UE camps in the second cell of the first communication network and the UE is in the RRC dormant state, receiving, by the UE, user operations; transmitting, by the UE, an RRC connection resumption request to the access network device; switching, this UE, from the idle RRC state to the connected RRC state; and transmitting, by the UE, the uplink data to the access network device.

In other words, when UE is in an inactive state of RRC in the first communication network, after receiving the user to go to the combined state of RRC, this UE may not remain in an inactive state of RRC, but go to the combined state of RRC. This creates another other way to allow UE to get out of an inactive state of RRC in the first communication network.

According to a second aspect, a method for increasing a UE's response rate to paging messages is provided, comprising: camping by a user equipment, a UE, in a first cell of a first communication network where the UE is in an RRC connected state; in response to the RRC inactive state indication received from the access network device, transition by the UE to the RRC inactive state; and when the predetermined condition is satisfied, camping by the UE in the second cell of the first communication network, where the UE is in the RRC dormant state and the first cell and the second cell are the same cell or different cells.

In one possible implementation, the procedure for camping by the UE in the second cell of the first communication network, when a predetermined condition is satisfied, where the UE is in the RRC idle state, comprises: after the predetermined condition is satisfied, camping by the UE first in the third cell of the second communication network, and then in the second cell of the first communication network where the UE is in the RRC dormant state.

In one possible implementation, said predetermined condition comprises: the UE determines that the signal in the first cell does not satisfy the persistence condition; either this UE has restarted; or the UE activates the flight mode and then exits the flight mode.

In one possible implementation, the camping procedure by the UE in the second cell of the first communication network, when a predetermined condition is satisfied, where the UE is in the RRC idle state, further comprises: when the UE determines that the signal from the first cell satisfies the cell reselection criteria, said UE reselecting a third cell in the second communication network and then a second cell of the first communication network, where the UE is in the RRC dormant state and the type of the second communication network is different from that of the first communication network.

In one possible implementation, the procedure for camping by the UE in the second cell of the first communication network, when a predetermined condition is satisfied, where the UE is in the RRC idle state, comprises: when the predetermined condition is satisfied, camping by the UE in the second cell of the first communication network, where it is The UE does not enter the RRC idle state; or when a predetermined condition is satisfied, camping by the UE in the second cell of the first communication network and transitioning to the RRC idle state and then to the RRC idle state.

In one possible implementation, after the UE camps on the second cell of the first communication network and the UE is in the RRC dormant state, the method further comprises: in response to the first RAN paging message sent by the access network device and received by the UE, resuming the considered UE RRC connection with the specified access network device and switch from RRC idle state to RRC connected state.

In one possible implementation, the method further comprises: when the UE camps on the second cell of the first communication network and the UE is in an RRC dormant state, sending said UE a registration request to the access network device; and in response to receiving a registration success response received from said access network device, erasing by the UE the UE context related to that UE in the RRC idle state and entering the RRC idle state.

In one possible implementation, the method further comprises: when the UE camps on the second cell of the first communication network and the UE is in an RRC idle state, receiving said UE a second message transmitted by the access network device, where this second message is used to indicate the UE in question. that it should transition to the RRC pending state; and erasing, by said UE, the UE context related to that UE in the RRC idle state, and switching to the RRC idle state.

In one of the possible implementation options, the indication for the transition to the RRC waiting state contains the abnormal alarm and the paging communication of the base network, where this cancellation alarm does not contain a suspension configuration.

In one possible implementation, the method further comprises: when the UE camps on the second cell of the first communication network and when the UE is in an RRC dormant state, receiving a user operation by said UE; transmitting, by the UE in question, an RRC connection resumption request to the access network device; switching said UE from the idle RRC state to the connected RRC state; and transmitting the UE uplink data to the access network device.

According to a third aspect, a communication system is provided, comprising an access network device and a user equipment, a UE, where the UE is configured to camp in a first cell of a first communication network, where said UE is in an RRC connected state; said access network device is configured to: when the first predetermined condition is satisfied, send a first message to the UE in question, where the first message is used to indicate to the UE that it should enter the RRC sleep state; and register that this UE is in the RRC dormant state; and the UE is further configured to: in response to receiving said first message, transition to an RRC sleep state; and when the second predetermined condition is satisfied, camp in the second cell of the first communication network where the UE is in the RRC dormant state and the first cell and the second cell are the same cell or different cells.

In one possible implementation, the procedure for camping by the UE in the second cell of the first communication network, when the second predetermined condition is met, where the UE is in the RRC idle state, comprises: after the second predetermined condition is satisfied, camping by the UE first in the third cell of the second communication network and then in the second cell of the first communication network where the UE is in the RRC dormant state.

In one possible implementation, said second predetermined condition comprises: the UE determines that the signal from the first cell does not satisfy the persistence condition; either this UE has restarted; or the specified UE activates the flight mode and then exits the flight mode.

In one possible implementation, the camping procedure by the UE in the second cell of the first communication network, when the second predetermined condition is met, where the UE is in the RRC dormant state, further comprises: when the specified UE determines that the signal in the first cell satisfies the reselection criteria cells, reselection by the UE in question first of the third cell in the second communication network and then of the second cell in the first communication network, where the UE is in the RRC dormant state, and the type of the second communication network is different from that of the first communication network.

In one possible implementation, the procedure for camping by the UE in the second cell of the first communication network, when the second predetermined condition is met, where the UE is in the RRC idle state, comprises: when the second predetermined condition is satisfied, camping by the UE in the second cell of the first communication network where this UE does not transition to the RRC idle state; or when the second predetermined condition is satisfied, camping by the UE in the second cell of the first communication network, and transitioning to the RRC idle state and then to the RRC idle state.

In one possible implementation, the UE is further configured to: in response to the first RAN paging message received from the access network device, resume the RRC connection with the access network device and switch from the RRC dormant state to the RRC connected state.

According to a fourth aspect, a computer-readable information storage medium is provided, containing computer instructions, such that when executing these computer instructions in a UE, the UE implements the method described in the above aspects, and in any possible implementation of this method.

According to a fifth aspect, a computer program product is provided such that, when the computer product is running on a computer, such computer implements the method described in the above aspects and any possible embodiment of the method.

According to a sixth aspect, there is provided a system on a chip comprising a processor such that when the processor executes an instruction, the processor performs the method described in the above aspects and any possible embodiment of the method.

According to a seventh aspect, a device is provided, where the device enters a UE and has the function of implementing the behavior of that UE in accordance with the method described in the above aspects, and in any possible implementation of this method. Such a function may be implemented in the hardware, or in the associated software executed by the hardware. Said hardware or software comprises at least one module or block corresponding to the function mentioned above, such as a receiving module or block, a transmitting module or block, a decision module or block, and a switching module or block.

Brief description of the drawings

Fig. 1A is a simplified block diagram of a communication system according to one embodiment of the present application;

fig. 1B is a simplified diagram illustrating switching between different state machines in a UE in a known NR system;

fig. 1C is a simplified diagram illustrating switching between different state machines in known NR systems and an LTE system;

fig. 2 is a simplified block diagram of an electronic device according to one embodiment of the present application;

fig. 3A is a simplified flow diagram of a method for increasing the paging response rate in a UE according to one embodiment of the present application;

fig. 3B is a simplified diagram of some graphical user interfaces in known UEs;

fig. 3C is a simplified diagram of some graphical user interfaces in a UE according to one embodiment of the present application;

fig. 4 represents a simplified paging logic in known UEs;

fig. 5 is a simplified logic diagram of another method for increasing the paging response rate in a UE according to one embodiment of the present application; And

fig. 6 is a simplified block diagram of a system on a chip according to one embodiment of the present application.

Description of options

In the description of the options of this application, unless otherwise specified, the "/" sign represents a function of "or". For example, A/B may represent A or B. The term “and/or” in this description denotes only an associative ratio for describing associated objects, indicating that three ratios may exist. For example, A and/or B can represent the following three cases: only A, and A and B and only B.

In the following description, the terms "first" and "second" are used merely for description and should not be construed as indicating or implying relative importance, or as implicitly indicating the number of technical features recited. Therefore, features defined as "first" and "second" may explicitly or implicitly cover one or more of these features. In the descriptions of variants of the present application, unless otherwise specified, "several of" means at least two.

In embodiments of the present application, words such as "example" or "for example" are used to illustrate or describe. Any examples or designs described as "example" or "for example" in embodiments of this application should not be interpreted as preferring or advantageous over other options or designs. In particular, words such as "example" or "for example" are intended to present the concepts to which they refer in a specific way.

For example, the method proposed in the embodiments of the present application is applicable to fifth generation (5G) systems, the LTE system, or other communication systems that allow the UE to switch to the RRC_INACTIVE state. Communication networks to which the technical solutions proposed in this application are applicable are not limited to the options of this application. In the following, the technical solutions proposed in the embodiments of the present application are discussed using the 5G communication network as an example.

In FIG. 1A is a simplified diagram of a 5G communication network architecture according to one embodiment of the present application. The 5G communication network comprises a 5G core communication network (5GC) and a 5G access network (NG-RAN).

The 5G core communications network (5G core, 5GC) includes, but is not limited to, an access and mobility management function (AMF)/user plane function (UPF). The AMF function is responsible for encryption and message integrity protection of the Non-access stratum (NAS) and implements functions such as UE registration, attachment, mobility, and SMS transparent messaging. The UPF function, as an anchor point of intra-system/inter-system mobility, is responsible for routing and forwarding data packets, inspecting data packets, and implementing policy rules in the user plane part; as an uplink classifier, supports the routing of flows to the data network; and as a branching point, supports multiple host protocol data unit (PDU) sessions, user-plane QoS processing, downlink packet buffering, downlink data alert triggering, and other such functions.

The 5G access network (NG-RAN) contains a device with radio transceiver functions, either an integrated circuit chip (system on a chip), or a component or assembly installed on the device. An NG-RAN network may contain a gNB node or a transmission point (TRP or TP) in a 5G system (e.g., in an NR system) and one antenna panel or one antenna panel group (including multiple antenna panels) of a base station in a 5G system. , or it can be a communication network node that forms a gNB node or transmitting point, for example, a baseband unit (BBU), a distributed unit (DU), or a road side unit (RSU) with a base station function . The gNB node represents the user plane end node of the NR system and the control plane protocol for the UE, and is also connected to the 5GC network using the NG interface.

In some examples, the NG-RAN may further comprise an ng-eNB node. In the non-standalone (NSA) Option 4 network architecture, the base station of the 4G system needs to be upgraded to support the eLTE system and interoperate with the 5G core network. The upgraded base station of the 4G system is called the ng-eNB node. Due to the dual connectivity (DC) of the 5G NR (N) system and the 4G eNB (E) base station with the 5G NR system as anchor point, this architecture is called NE-DC (NR eNB Dual Connection). Similarly, in a non-autonomous (NSA) network architecture according to Option 7, a base station of a 4G system communicates with a 5G core communication network. The updated base station of the 4G system is also called ng-eNB. However, with the anchor point at the ng-eNB node, this architecture is called NGEN-DC (NG-Enb NR Dual Connection). The ng-eNB node represents the user plane end node of the E-UTRA system and the control plane protocol for the UE, and is connected to the 5GC network using the NG interface.

The base stations (gNB, ng-eNB, and the like) in the NG-RAN can be connected to one another via Xn interfaces for communication.

For ease of understanding, the state machine and UE state switching in the NR system will be discussed first. The state machine determines the behavior and states of the UE in various cases.

As shown in FIG. 1B, a UE state machine in an NR system has an RRC connected state (in other words, an RRC_CONNECT state), an RRC inactive state (in other words, an RRC_INACTIVE state or an idle state), and an RRC idle state (in other words, an RRC_IDLE state).

For example, upon startup, the UE searches for a cell, selects a suitable cell, and camps on that selected cell. In this case, UE is in a state of RRC_IDLE. At this time or later, the UE transmits an RRC connection establishment request to the network side and registers. After the UE has established an RRC connection with the network side, the UE switches from the RRC_IDLE state to the RRC_CONNECT state. In this case, the UE may communicate with the network side via this RRC connection, such as transmitting control plane data and/or user plane data. If there is no data transmission between the UE and the network side for a period of time (eg, time period 1), the network side may send a release signaling to directly release the connection between the core communication network and the UE. Then UE switches from the state of RRC_Connect to the RRC_IDLE state. In this case, the UE is disconnected from the access network, and the access network is disconnected from the core communication network.

Alternatively, if there is no data transmission between the UE and the network side for a period of time (eg, time period 1), the network side may send a cancel signaling carrying a suspend configuration to directly cancel the connection between the core communication network and the UE. . The UE then switches from the RRC_CONNECT state to the RRC_INACTIVE state. In this case, the access network that the UE joined for the last time remains still connected to the core communication network. When it is necessary to transfer data between the UE and the network side, the connection between the UE and the access network can be quickly resumed (resume). In other words, the UE can quickly switch from the RRC_INACTIVE state back to the RRC_CONNECT state.

Alternatively, if there was still no data transmission between the UE and the network side for a certain period of time (for example, time period 2), after the UE has entered the RRC_INACTIVE state, the network side may completely cancel the connection between the core communication network and access network. Then UE switches from the state of RRC_INACTIVE to the RRC_IDLE state. In this case, when the UE is in the RRC_IDLE state, if it is necessary to transmit data between such UE and the network side, the UE needs to re-establish a connection with the network side.

In some embodiments, when a predetermined condition is met (eg, no data is being received or transmitted, or flight mode is activated), the UE may also actively initiate RRC connection release and other such functions.

It can be understood that in the NR system, the UE may switch between the RRC_INACTIVE state, the RRC_INACTIVE state, and the RRC_IDLE state. In addition to this, the UE may also interact with another system (eg, LTE/UMTS/GSM) to change the RRC state. In FIG. 1C is a simplified diagram illustrating interaction state switching between an NR system and an LTE system. For example, from the RRC_INACTIVE state or the RRC_IDLE state in the NR system, the UE may reselect the LTE system and switch to the RRC_IDLE state of the LTE system. From the RRC_IDLE state of the LTE system, the UE may switch to the RRC_IDLE state of the NR system through reselection, but not to the RRC_INACTIVE state of the NR system.

In some scenarios, the state of the UE registered on the network side may be inconsistent with the actual state of that UE. For example, when the network side instructs the UE to enter the RRC_INACTIVE state, the network side registers that the UE is in the RRC_INACTIVE state, and the UE enters the RRC_INACTIVE state according to the indication of the network side. When the UE detects that the current cell where it is camped does not satisfy the camping condition, the UE disconnects from the communication network. The UE searches the network again, finds another cell that satisfies the camping condition, and camps in that cell. In this case, the UE switches to the RRC_IDLE state. It should be noted that at this point, the UE state registered by the network side remains unchanged and is still the RRC_INACTIVE state.

When the UE is in the NR system, if there is no data transmission between the UE and the network side for a certain period of time, the network side instructs such a UE to enter the RRC_INACTIVE state. When the UE is in the RRC_INACTIVE state, if the signal from the current serving cell does not satisfy the camping condition, that UE disconnects from the communication network. This UE performs a cell search. If the cell that satisfies the camping condition and found during the cell search is an LTE system cell, the UE camps on that LTE cell. In this case, the UE switches to the RRC_IDLE state in the LTE system. However, on the network side in the NR system, it is still registered that this UE is in the RRC_INACTIVE state in the NR system. In some examples, the UE successfully registers with a cell of the LTE system. Thereafter, if data needs to be transmitted, the UE establishes an RRC connection with the LTE communication network and switches from the RRC_IDLE state of the LTE system to the RRC_CONNECT state of the LTE system. In some other examples, if the UE fails to successfully register with an LTE system cell, or if that LTE system cell does not satisfy the camping condition, that UE searches for the cell again, finds an NR system cell, and camps in that NR system cell. In this case, the UE transitions to the RRC_IDLE state in the NR system. However, on the network side in the NR system, it is registered that this UE is in the RRC_INACTIVE state.

Alternatively, when the UE is in the RRC_INACTIVE state and the UE detects that the current cell where it is docked satisfies the cell reselection criteria, the UE reselects the cell. The UE may reselect a cell from another system (eg, from an LTE system), but reselect a cell from an NR system due to unsuccessful registration with the other system. When a UE reselects a cell from another system, that UE switches from the RRC_INACTIVE state in the NR system to the RRC_IDLE state in the other system. When the UE reselects a cell again in the NR system, the UE again switches from the RRC_IDLE state of the other system back to the RRC_IDLE state of the NR system. It should be noted that at this time, the state of the UE registered on the network side remains unchanged and is still the RRC_INACTIVE state.

As described above, when the state of the UE registered on the network side differs from the actual state of that UE, such a UE responds slowly to the paging message from the network side, resulting in degradation of the user experience. Therefore, according to the method of increasing the success rate of responding to paging messages by a UE according to embodiments of the present application, when the UE is in the RRC_INACTIVE state, such a UE does not automatically transition to the RRC_IDLE state, but remains in the RRC_INACTIVE state in some specific scenario, or automatically transitions to the RRC_INACTIVE state. RRC_IDLE and then rapidly transitions to the RRC_INACTIVE state in a particular scenario. This particular scenario includes, but is not limited to, the following: the UE in the RRC_INACTIVE state disconnects from the communication network and then reattaches to the cells of the original system; or the UE in the RRC_INACTIVE state disconnects from the communication network, camps in the cell of the other system, and then camps in the cell of the home system again when the UE is not registered and failed to register successfully in the cell of the other system; or the UE in the RRC_INACTIVE state reselects a cell of the other system, but camps on the cell of the home system again when the UE is not registered and failed to successfully register with the cell of the other system. Thus, the method proposed in the embodiments of the present application keeps the actual state of the UE consistent with the state of that UE registered on the network side, increasing the UE's response rate to the paging message from the network side, so as to improve the service for the user.

For example, in one embodiment of the present application, the UE may be, for example, a mobile phone, a tablet computer, a personal computer (PC), a personal digital assistant (PDA), a smart watch, a netbook, a wearable device, augmented reality (AR) device, virtual reality (VR) device, car device, smart screen, smart car, smart pickup, robot, etc. The specific shape of the UE in the present application is not particularly limited.

In FIG. 2 is a simplified block diagram of UE 100.

This UE 100 may include a processor 110, an external storage interface 120, an internal storage 121, a universal serial bus (USB) interface 130, a charge control module 140, a power control module 141, a battery 142, an antenna 1, an antenna 2 , mobile module 150, radio module 160, audio module 170, loudspeaker 170A, telephone receiver 170B, microphone 170C, headphone jack 170D, touch module 180, button 190, motor 191, indicator 192, camera lens 193, display 194, a subscriber identification module (SIM) interface 195, and the like. It can be understood that the structure of embodiments of the present invention does not constitute any particular limitation on UE 100. In some other embodiments of the present application, UE 100 may contain more or fewer components than shown in the drawing, some components are combined, some components are split, or some components are arranged differently. The components shown in the drawing may be implemented in the form of hardware, software, or a combination of hardware and software.

Processor 110 may include one or more processor modules. For example, processor 110 may be an application processor (AP), a modem processor module, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor ( digital signal processor (DSP), video processor and/or neural network processing unit (NPU) or other similar processor. The various processor modules may be separate devices or may be integrated into one or more processors.

The controller may generate an operation control signal based on the instruction operating code and the time sequence signal to control the fetch instructions and the instructions to be executed.

The processor 110 may also include a storage device configured to store instructions and data. In some embodiments, the storage device in processor 110 is a cache device. This storage device may store instructions or data recently used or used cyclically by the processor 110. If an instruction or data needs to be used again, the processor may directly recall the instructions or data from the storage device. This avoids repetitive access and reduces processor 110 latency, thereby improving system efficiency.

It can be understood that the interface connections between modules shown in FIG. 2 are described here merely by way of example and do not constitute limitations of the design of UE 100. In some other embodiments of the present application, UE 100 may alternatively use a different interface connection method than the above, or a combination of different interface connection methods.

The charge control module 140 is configured to receive charge from the charger. The charger may be a wireless charger or a wired charger. In some cable-based charging embodiments, the charge control module 140 may receive an input charge from a wired charger using the USB interface 130. In some wireless charging embodiments, the charge control module 140 may receive a charge wirelessly using the UE 100 wireless charging coil. battery 142, the charge control module 140 may also transmit power to the UE using the power control module 141 .

Power control module 141 is configured to couple to battery 142, charge control module 140, and processor 110. Power control module 141 receives power from battery 142 and/or charge control module 140 and transfers power to processor 110, internal storage 121, display 194, lens video camera 193, radio module 160, etc. The power management module 141 may also be configured to monitor parameters such as battery capacity, battery cycles, and battery health (leakage and resistance). In some other embodiments, power management module 141 may alternatively be located in processor 110. In some other embodiments, power management module 141 and charge management module 140 may alternatively be located in the same device.

The radio communication function of UE 100 may be implemented using antenna 1, antenna 2, mobile communication module 150, radio communication module 160, modem processor module, video band processor, and the like.

Antenna 1 and antenna 2 are configured to transmit and receive an electromagnetic wave signal. Each antenna in UE 100 may be configured to cover one or more communication bands. The antenna can also be used for various purposes in order to increase the utilization of the antenna. For example, antenna 1 can be reused as a diversity antenna in a radio local area network. In some other embodiments, the antenna may be used in conjunction with a tuning switch.

Mobile communication module 150 may provide radio communication solutions including 2G/3G/4G/5G generations for application to UE 100. Mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier (LNA ) and other similar devices. The mobile communication unit 150 can receive electromagnetic waves using the antenna 1, perform filtering, amplification and other processing of the received electromagnetic waves, and transmit the processed electromagnetic waves to the modem processing unit for demodulation. The mobile communication module 150 may also amplify the signal modulated by the modem processor module and convert the amplified signal into electromagnetic waves for radiation using antenna 1. In some embodiments, at least a portion of the functional modules from the mobile communication module 150 may be located in the processor 110. In some embodiments, at least a portion of the functional modules from the mobile communications module 150 and at least a portion of the processor modules 110 may be located in the same device.

The modem processor module may include a modulator and a demodulator. The modulator is configured to modulate a low frequency video band signal to be transmitted and convert it to a mid or high frequency signal. The demodulator is configured to demodulate the received electromagnetic wave signal and convert it into a low frequency video band signal. The demodulator then passes the low frequency videoband signal obtained by demodulation to the videoband processor for processing. After processing in the video band processor, the low frequency video band signal is transmitted to the application processor. This application processor outputs an audio signal using an audio device (not limited to speaker 170A, telephone receiver 170B, etc.), or presents an image or video using display 194. In some embodiments, the modem processor module may be a separate device. In some other embodiments, the modem processor module may be independent of the processor 110 and located on the same device as the mobile communications module 150 or other functional module.

The (wireless) radio module 160 can provide radio solutions applicable to the UE 100 equipment, including local radio networks (wireless local area network, WLAN) (for example, a network of "wireless fidelity" (wireless fidelity, Wi-Fi)), Bluetooth ( bluetooth, BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared communication (infrared, IR) and others similar solutions. The radio communication module 160 may be implemented as one or more devices integrating at least one communication processor module. The radio communication module 160 receives electromagnetic waves using the antenna 2, performs frequency modulation and filtering of the electromagnetic wave signal, and transmits the processed signal to the processor 110. This radio communication module 160 may also receive the signal to be transmitted from the processor 110, perform frequency modulation and amplification of this signal, and convert the processed signal signal into electromagnetic waves for radiation using an antenna 2.

In some embodiments, antenna 1 of UE 100 is connected to mobile communication module 150 and antenna 2 is connected to radio communication module 160 so that UE 100 can communicate with the communication network and with another device using radio technology. Such a radio technology can be a global system for mobile communications (GSM), a general packet radio service (GPRS), a code division multiple access (CDMA) system, a broadband a wideband code division multiple access (WCDMA) system, a time-division code division multiple access (TD-SCDMA) system, a long-term evolution (LTE) system , BT, GNSS, WLAN, NFC, FM and/or IR technology, or other similar technology. A GNSS system can be a global positioning system (GPS), a global navigation satellite system (GLONASS), a beidou navigation satellite system (BDS), a quasi-anti-aircraft satellite system ( quasi-zenith satellite system, QZSS) and/or satellite based augmentation systems (SBAS).

UE 100 performs a display function using a GPU processor, a display 194, an application processor, and the like. The GPU is an image processing microprocessor and is connected to the display 194 and the application processor. The GPU processor is configured to perform mathematical and geometrical calculations to display graphics. The processor 110 may include one or more GPU processors and executes software instructions to generate or modify the information presented on the display.

The display 194 is configured to present an image, video, or other such information. This display 194 contains a display panel. The display panel can use liquid crystal display (LCD), organic light-emitting diode (OLED), active-matrix organic light emitting diode (AMOLED), flexible LED panels (flex light- emitting diode, FLED), Miniled, MicroLed, Micro-oLed LED panels, quantum dot light emitting diodes (QLED), or other similar elements. In some embodiments, UE 100 may contain 1 or N displays 194, where N is a positive integer greater than 1.

The external storage interface 120 may be configured to connect to an external memory card, such as a Micro SD card, to expand the recording and storage capacity of the UE 100. The external memory card communicates with the processor 110 using the external storage interface 120 to implement a data storage function. For example, files such as music and videos are stored on this external memory card.

The internal storage device 121 may be configured to store computer-executable program code, where the program code being executed contains instructions. The internal storage device 121 may have a program storage area and a data storage area. The program storage area may store an operating system, an application program necessary for performing at least one function (eg, a sound reproduction function and a picture reproduction function), and other such programs. The data storage area may store data (eg, audio data and a phone book) created during use of the UE 100 and other such information. In addition, the internal storage device 121 may comprise a fast random access storage device and may further comprise a non-volatile storage device, such as at least one disk storage device, a flash memory device, or a universal flash storage (UFS ). The processor 110 executes instructions stored in the internal storage 121 and/or instructions stored in the processor's own storage to execute various functional applications and data processing in the UE 100.

In embodiments of the present application, after receiving an indication from the network side to enter the RRC_INACTIVE state, the processor 110 (which may in particular be a video band processor) may store, in the internal storage 121, a context (denoted as the first UE context) of the UE, transitioning to the RRC_INACTIVE state, so that after network disconnection/cell reselection, the UE remains in the RRC_INACTIVE state based on the stored first UE context. In some examples, upon determining that the UE has successfully re-registered with the network side, or upon receiving an indication (e.g., cancel signaling or CN Paging) from the network side to cancel the RRC connection, processor 110 (which may in particular be a video band) may erase the first UE context from the internal storage 121.

UE 100 may implement an audio function using an audio module 170, a speaker 170A, a telephone receiver 170B, a microphone 170C, a headphone jack 170D, an application processor, and other such components, for example, for playing music or for sound recording.

The audio module 170 is configured to convert the digital audio information into an analog audio signal for output and convert the input analog audio signal into a digital audio signal. This audio module 170 may also be configured to encode and decode an audio signal. In some embodiments, audio module 170 may reside within processor 110, or a portion of functional modules from audio module 170 may reside within processor 110.

Speaker 170A is configured to convert an electrical audio signal into an audio signal. The user can listen to music or answer a phone call in hands-free mode using this 170A UE 100 speaker.

The telephone receiver 170B, also referred to as a "receiver", is configured to convert an electrical audio signal into an audio signal. When answering a call or listening to a voice message, the user can listen to the speech by holding the telephone receiver 170B of the UE 100 close to the ear.

Microphone 170C, also referred to as "mike" or "sound transmitter", is configured to convert an audio signal into an electrical signal. When making a phone call or sending a voice message, the user may speak close to the microphone 170C to input an audio signal into the microphone 170C. UE 100 may be equipped with at least one microphone 170C. In some other embodiments, UE 100 may have two microphones 170C to provide noise cancellation functionality in addition to audio signal collection. In some other embodiments, UE 100 may alternatively have three, four, or more microphones 170C to collect audio, implement noise cancellation, audio source recognition, directional audio recording, and other such functions.

The 170D headphone jack is configured to connect to a wired headset. This headphone jack 170D may be a USB interface 130, or may be an open mobile terminal platform (OMTP) or cellular telecommunications industry association 3.5 mm interface. of the USA, CTIA).

The 190 button can be a power button, volume button or another button. This button 190 may be a mechanical button or a touch button. UE 100 can accept the input from the button and generate the input signal of the button associated with the user settings and control the Functions UE 100.

Motor 191 may generate a vibration prompt. This motor 191 can be used to vibrate an incoming call and can also be used for sensory vibratory feedback. For example, different vibration feedback effects may correspond to touch operations (touches) in different applications (eg, photographing and playing audio programs). The motor 191 can also create different vibration feedback effects corresponding to touch operations (touches) in different areas of the display 194. Different vibration feedback effects can alternatively correspond to different application scenarios (e.g., time remaining timer, receiving information, alarm clock, and games) . The vibrational effects of sensory feedback can also be specialized.

The indicator 192 may be an indicator light, may be configured to indicate the state of charge and battery level changes, and may also be configured to indicate the receipt of messages, missed call, alerts, and other such events.

The SIM card interface 195 is configured to connect to the SIM card. Such a SIM card may be inserted into SIM card interface 195 to bring it into contact with UE 100, or removed from SIM card interface 195 to separate from UE 100. UE 100 may support 1 or N SIM card interfaces, where N is a positive integer greater than 1. This 195 SIM card interface can support Nano SIM card, Micro SIM card, SIM card, etc. In the same interface of 195 SIM cards, multiple cards can be inserted at the same time. These multiple cards may be of the same type or different types. The SIM interface 195 may also support different types of SIM cards. Such a SIM card interface 195 may also support an external memory card. UE 100 communicates with a communication network using a SIM card to perform functions such as sending/receiving (telephone) calls and data transmission. In some embodiments, UE 100 uses an eSIM card, in other words, an embedded SIM card. Such an eSIM may be embedded in UE 100 and cannot be separated from that UE 100.

The UE 100 with the above hardware architecture may implement the technical solutions in accordance with the following options. In the following, the technical solutions offered by the variants of the present application will be described in detail.

To facilitate understanding of the technical solutions proposed in this application, the similarities and differences between the RRC_INACTIVE state and the RRC_CONNECT state, as well as the similarities and differences between the RRC_INACTIVE state and the RRC_IDLE state, will first be considered.

1. Similarities and differences between the RRC_INACTIVE state and the RRC_CONNECT state.

Similarities: (1) Both the UE and the NR-RAN store an access stratum (AS) context for the UE.

(2) A connection has already been established to the CN and to the NG-RAN in the control plane/user plane. From the point of view of the core communication network, the UE is in a state of connection with this communication network CM-CONNECT.

Differences: (1) In the RRC_CONNECT state, the NG-RAN stores the identity of the serving cell where the UE is located. In the RRC_INACTIVE state, the NR-RAN does not store the ID of the serving cell where the UE resides, but stores the RNA where the UE resides, so that the paging message to that UE needs to be sent in that RNA. In addition, the NG-RAN configures the discontinuous reception (DRX) cycle used by the UE.

In the DRX UE administration mechanism, it periodically goes into sleep mode, during which the PDCC canal is not monitored, and “awakens” from this sleep mode when monitoring is required, thereby saving energy for UE.

(2) In the RRC_INACTIVE state, Public Land Mobile Network (PLMN) selection, cell reselection, broadcast system message reception procedure, and RNA domain related procedures can be performed.

(3) In the RRC_CONNECT state, uplink/downlink bearers, network-controlled mobility, measurements, switching, and the like can be performed.

2. Similarities and differences between the RRC_INACTIVE state and the RRC_IDLE state

Similarities: PLMN selection, cell reselection, and broadcast system message reception procedure can be performed in both states.

Differences: (1) In the RRC_IDLE state, the CN stores the TA where the UE is located, but does not store the ID of the serving cell where the UE is located, so the network side sends a paging message to the UE in the TA (in other words, delivers the CN message paging).

In the RRC_INACTIVE state, the NR-RAN does not store the identity of the serving cell where the UE resides, but stores the RNA where the UE resides, so that the network side sends a paging message to the UE in the RNA (in other words, delivers a RAN Paging message).

(2) The DRX receive cycle in the RRC_IDLE state is configured as UE-specific by the NAS layer or is configured as cell-wide, and the DRX receive cycle in the RRC_INACTIVE state may be configured in the RRC connection suspended by the NG-RAN.

(3) In the RRC_INACTIVE state, both the UE and the NG-RAN maintain the AS context of the UE.

(4) In the RRC_INACTIVE state, a connection can be established with the CN and the NG-RAN in the control plane/user plane.

In FIG. 3A is a flow diagram of a method for increasing the paging response rate in a UE according to one embodiment of the present invention. This method specifically comprises the following steps.

S301. The UE camps in cell A of the first communication network.

The first communication network is, for example, a 5G system (eg, an NR system), an LTE system (eg, a narrowband Internet of Things (NB-IoT) system), or another communication system allowing the UE to switch to the RRC_INACTIVE state.

S302. The UE receives an indication from the first communication network and transitions to the RRC_INACTIVE state. In this case, the UE state registered by the first communication network is the RRC_INACTIVE state.

After the UE camps on the first communication network and registers successfully, the UE may request to establish an RRC connection with the first communication network. After UE sets the RRC connection with the first communication network, according to the installed connection, RRC can be transmitted (data planes/control data/data planes). In this case, the UE is in the RRC_CONNECT state in the first communication network. If there is no data transmission between the UE and the first communication network for the first predetermined period of time, the first communication network may indicate to the UE that it should transition to the RRC_INACTIVE state in the first communication network.

In one specific implementation, the core communication network device (eg, AMF) in the first communication network may have RRC INACTIVE ASSISTANCE INFORMATION (RRC INACTIVE ASSISTANCE INFORMATION) information carried in an INITIAL CONTEXT SETUP REQUEST message, or in a UE CONTEXT MODIFICATION REQUEST message and deliver the message to the NG-RAN to be used by the NG-RAN to determine if the UE can enter the RRC_INACTIVE state. The auxiliary information for the RRC inactive state contains: an indication of the registration area configured for the UE (UE identify index value), a UE specific DRX reception mode (UE specific DRX), a periodic registration update timer, a MICO mode indicator (MICO mode indication), UE ID index value, and other such information. The UE ID index value is used as a reference for configuring the RAN-based notification area (RNA) of the UE for the gNB. The specified UE-specific DRX reception mode and UE ID index value are used for UE paging. The periodic registration update timer is used as a reference for configuring the RNA region update timer for the gNB. Thereafter, the NG-RAN from the first communication network can specifically determine, based on the type of UE, the application in that UE, the configuration of the communication network, or the like, when to indicate to the UE to enter the to RRC_INACTIVE state.

S303. The UE stores the first UE context.

After transitioning to the RRC_INACTIVE state in the first communication network, the UE retains the current context of that UE, namely the first UE context, so that the RRC_CONNECT state in the first communication network can be quickly restored from the RRC_INACTIVE state in this first communication network, or then remain in the RRC_INACTIVE state in this first communication network. The UE context contains, but is not limited to, the AS layer context of the UE, such as the UE security algorithm capabilities, the aggregated maximum data rate for the UE, the generated session PDU information list, the RRC context, the mobility restriction list, and other characteristics. The Mobility Restriction List contains a UE Denied RAT, a TA Denied Area List, a TA Serving Area List, a PLMN, and an ELPLMN. The list of information about the created PDU sessions contains the index index and the type of session, the selected layer (cut), the aggregated maximum speed of data transfer for the session, the quality of the service (QOS) for the stream installed in the session, and other similar information.

In addition, after the UE enters the RRC_INACTIVE state in the first communication network, the NG-RAN, which in particular can be represented by the gNB to which this UE last joined, saves that UE's context and the NG connection. between the UE in question and the AMF/UDP function so that the NG-RAN can quickly resume the RRC connection, allowing the UE to quickly switch from the RRC_INACTIVE state in the first communication network back to the RRC_CONNECT state in this first communication network.

In some versions of this application, when UE is in a state of RRC_INACTIVE in the first communication network, if it is found that the cell in which this equipment is currently fixed, does not satisfy the fixing condition, this UE searches for the cell. In other words, after step S303, step S304 and step S305 are carried out, or step S304 and step S306 are carried out.

S304. If cell A does not satisfy the sticky condition, the UE searches for the cell.

When the UE is in the RRC_INACTIVE state in the first communication network, if cell A where this equipment is currently camped in the first communication network is found to not satisfy the camping condition, the UE disconnects from the communication network and searches for the cell. For example, when the user brings the UE into an environment with poor signal quality from the first communication network (for example, an elevator car or a basement), either the user activated the flight mode by mistake and then canceled this flight mode, or an abnormal restart of the UE occurred if it turned out that that cell A where this equipment is currently camped in the first communication network does not satisfy the camping condition, the UE searches for a cell to find a cell that satisfies the given condition and camps in that cell.

For example, the procedure for determining whether cell A of the first communication network satisfies the sticky condition contains the following content:

(1) Cell A's PLMN is a PLMN selected by the NAS layer, the cell's PLMN is a registered PLMN, or the cell's PLMN is a PLMN from the list of equivalent PLMNs;

(2) Cell A is not a prohibited cell;

(3) The tracking area identifier (TAI) for cell A is not a TAI for forbidden tracking areas for roaming; And

(4) Cell A satisfies the cell selection criteria, where the set of these cell selection criteria contains: Srxlev > 0, and Squal > 0, where Srxlev represents the cell selection RX level value (dB)), and Squal represents the cell selection quality value (dB). Specific methods for calculating Srxlev and Squal can be found in the relevant art.

S305. If the UE chooses camping in cell B of the first communication network, that UE remains in the RRC_INACTIVE state in the first communication network based on the first UE context.

In the conventional technique, the UE finds a cell B in the first communication network that satisfies the camping condition and selects a camping in that cell B, this UE clears the first context of this UE and switches from the RRC_INACTIVE state in the first communication network to the RRC_IDLE state in the first communication network. However, in this embodiment of the present application, after the UE camps in cell B, the UE does not erase the first UE context (in other words, retains the first UE context), and remains in the RRC_INACTIVE state in the first communication network based on the first UE context. It should be noted that at this time, the state of the UE registered by the first communication network is still the state of RRC_INACTIVE.

It should be noted that the situation where the UE remains in the RRC_INACTIVE state in the first communication network based on the first UE context comprises: the UE does not enter the RRC_IDLE state and still remains in the RRC_INACTIVE state after camping in a new cell (including the original cell); and the UE first transitions to the RRC_IDLE state and then transitions to the RRC_INACTIVE state based on the first UE context after camping in a new cell (including the original cell). This is not limited to embodiments of the present application.

Therefore, when using the method proposed by the embodiments of the present invention, the actual state of the UE remains consistent with the state of this UE registered on the side of the first communication network. Thus, when the first communication network is transmitting downlink data and the first communication network is paging using the RAN Paging message, the UE can quickly respond to the RAN Paging message to quickly switch from the RRC_INACTIVE state to the RRC_CONNECT state, and receive the downlink data and send uplink data. In addition, when the UE is in the RRC_INACTIVE state, the UE may also respond to the user's operation to actively and quickly resume the RRC connection and switch from the RRC_INACTIVE state to the RRC_CONNECT state. However, in the conventional technique, when the UE is in the RRC_IDLE state, if a user operation is detected, the UE needs to re-establish an RRC connection with the first communication network and switch from the RRC_IDLE state to the RRC_CONNECT state, which is slow.

It should be noted that cell B and cell A may be the same cell or different cells. If cell B and cell A are the same cell, the UE directly remains in the RRC_INACTIVE state based on the first UE context. If cell B and cell A are different cells, but cell B and cell A belong to the same RNA, the UE may still remain in the RRC_INACTIVE state based on the first UE context. If cell B and cell A are different and cell B and cell A do not belong to the same RNA area, the UE needs to initiate an RNA Update (RNAU) procedure so that cell B obtains the UE context from cell A and updates the data path. Upon completion of the RNA region update procedure, the access network device corresponding to cell B transmits a cancel configuration signaling to the UE, indicating to the UE that it should transition to the RRC_INACTIVE state. In addition, the UE updates, based on the pause configuration, the parameter configuration regarding the RRC idle state, including the configuration information of the RNA region. In this case, the UE stores the UE context (denoted as the second UE context) obtained after updating the RNA region. Thereafter, the UE may remain in the RRC_INACTIVE state based on the second UE context. Optionally, the UE erases the first UE context.

S306. If the UE chooses to camp in cell C of the second communication network, and then camp in cell D of the first communication network, that UE remains in the RRC_INACTIVE state in the first communication network based on the first UE context.

In a conventional technique, if the UE detects that a cell C of the second communication network satisfies the camping condition and selects a camping in that cell C, that UE clears the first UE context and switches from the RRC_INACTIVE state in the first communication network to the RRC_IDLE state in the second communication network. However, in some embodiments of the present application, after a UE camps in cell C, that UE does not erase the first UE context (in other words, retains the first UE context), and remains in the RRC_INACTIVE state in the first communication network based on the first UE context. It should be noted that at this time the state of UE, registered by the first communication network, is still the state of RRC_inactive this first communication network.

In some examples, the UE initiates a registration procedure in cell C after camping in that cell C. If the UE successfully registers in cell C in the second communication network, that UE clears the first UE context and switches from the RRC_INACTIVE state in the first communication network to the RRC_IDLE state in the second network connections. Thereafter, when data transmission occurs between the UE and the second communication network, the UE may switch from the RRC_IDLE state in the second communication network to the RRC_CONNECT state of the second communication network.

In some other examples, if the UE does not initiate the registration procedure in cell C after camping in that cell C, or if the UE initiates the registration procedure but fails to register, that UE camps in the first communication network again (e.g., camps in cell D the first communication network), and that UE may still remain in the RRC_INACTIVE state in the first communication network based on the first UE context. Cell D and cell A can be the same cell or different cells. Similarly, if cell D and cell A are the same cell, or if cell D and cell A are different cells, but cell D and cell A belong to the same RNA region, the UE may still remain in the RRC_INACTIVE state. based on the first UE context. If cell D and cell A are different cells, and cell D and cell A do not belong to the same RNA area, the UE needs to initiate the RNA Update (RNAU) procedure. Before completing the RNAU update procedure, this UE remains in the RRC_INACTIVE state based on the first UE context. After completing the RNAU update procedure, the UE updates the RNA area and generates a new UE context. This UE may remain in the RRC_INACTIVE state based on the new UE context. Optionally, the specified UE erases the first UE context. It should be noted that in the conventional technique, when a UE camps on the second communication network, that UE is in the RRC_IDLE state on the second communication network. When the UE switches from the second communication network to the first communication network, the UE switches in the RRC_IDLE state of the first communication network.

It should be noted that in some other embodiments, after the UE camps in cell C, that UE does not erase the first UE context (in other words, retains the first UE context) and may first transition to the RRC_INACTIVE state in the first communication network and then switch to the RRC_IDLE state second communication network. After the UE camps in cell D of the first communication network again, the UE transitions to the RRC_INACTIVE state from the RRC_IDLE state based on the first UE context.

As described above, during the procedure in which the UE is detached from the communication network, camped on the second communication network, and then camps on the first communication network again, the UE remains in the RRC_INACTIVE state of the first communication network consistent with the state of the UE in question registered with the first network. connections. Thus, when the first communication network is transmitting downlink data and the first communication network is paging using the RAN Paging message, the UE can quickly respond to the RAN Paging message to quickly switch from the RRC_INACTIVE state to the RRC_CONNECT state and receive the downlink data and transmit uplink data.

In still another group of some other options, the graphical user interface in the UE may present on the display the identifier of the communication network in which the UE is currently anchored. For example, this ID of the communication network in which the UE is currently camped may be shown in the status bar of the graphical user interface in that UE. In the conventional technique, when a UE is camped on a 5G communication network (in other words, the first communication network is a 5G communication network) and enters the RRC_INACTIVE state, the UE displays the screen (1) shown in FIG. 3B, and the identifier "5G" appears in the status bar on the display of the UE. If the UE disconnects from the communication network, the screen (2) shown in FIG. 3B, and no communication network ID appears in the UE status bar on this screen. When the UE camps on the 4G communication network (in other words, the second communication network is a 4G communication network), the screen (3) shown in FIG. 3B, and the identifier "4G" will appear in the status bar of the UE in question. If the UE failed to successfully register with the 4G communication network or did not initiate registration with the 4G communication network and camped in the 5G communication network again, the screen (4) shown in FIG. 3B, and the identifier "5G" is presented in the status bar of the UE. Frequent changes in the communication network ID on the screen of the UE inform the user that the communication network is highly unstable, which degrades the user's quality of service.

If the method according to the embodiments of the present application is used, when the UE camps on a 5G communication network (in other words, the first communication network is a 5G communication network) and enters the RRC_INACTIVE state, the UE displays the screen (1) shown in FIG. 3C, and the status bar of the UE in question represents the "5G" identifier. If the UE disconnects from the communication network, this UE still remains in the RRC_INACTIVE state of the 5G network, this UE may display the screen (2) shown in FIG. 3C, where the status bar shows the identifier "5G" or the UE status bar does not show any communication network ID. When a UE camps in a 4G communication network (in other words, the second communication network is a 4G communication network), that UE still remains in the RRC_INACTIVE state of the 5G network and can display the screen (3) shown in FIG. 3C, and the status bar of the UE in question shows the identifier "5G". If the UE failed to successfully register with the 4G communication network, or did not initiate registration with the 4G communication network and camped in the 5G communication network again, the UE displays the screen (4) shown in FIG. 3C, and the status bar of the UE in question shows the identifier "5G". With this method, the communication network ID displayed on the display screen of the UE, namely the "5G" ID, rarely changes, so that the user is not notified of the instability of the communication network, thereby improving the quality of service for the user.

In some other embodiments of the present application, when the UE is in the RRC_INACTIVE state of the first communication network, if cell A of the first communication network where the UE is currently camped satisfies the cell reselection condition, the UE performs a cell reselection procedure. In other words, after step S303, steps S307 and step S308 can be further executed.

S307. If cell A satisfies the cell reselection criteria, the UE performs cell reselection.

When the UE is in the RRC_INACTIVE state in the first communication network, the UE searches for a cell with a higher signal quality according to the cell reselection criteria. For example, based on the priority information configured by the network side, the cell reselection criteria may cover the following three scenarios (a) to (c).

In scenario (a), if the priority level of the target cell is higher than the priority level of the serving cell, the conditions for triggering the cell reselection procedure are as follows:

(1) Within a predetermined time period, the value of the Srxlev parameter for the target cell is greater than the first threshold value; And

(2) The UE is camped on the serving cell for at least 1 s.

The Srxlev parameter represents the cell selection (reception, RX) reception level value, and the first threshold value represents the threshold condition that the Srxlev parameter must satisfy when the UE reselects a RAT technology/frequency with a higher priority than the current service frequency. For example, this first threshold may be represented as Thresh _{X, High} , in units of decibels (dB). Optionally, in embodiments of the present application, the length of said predetermined time period may be defined in accordance with standards, and this predetermined time period may be represented as Treselection _RAT . In different cases, the duration of the specified specified period of time may vary. For example, the length of the predetermined time period may be different in cases where the candidate cell and the serving cell are intra-frequency and inter-frequency cells.

In the scenario (b), if the level of priority of the target cell is the same as the level of priority of the service cell, the condition for starting to re -choose the cell is as follows:

During the specified specified time period, for the target cell, Rs is greater than Rs.

Criteria for re-choosing a cell in this scenario can be called the Cell-Ranking Criteria ranks, or R-criteria for brevity. The Rs and Rn values represent the cell ranking criteria for the serving cell and the cell ranking criteria for the candidate cell, respectively. In this example, the quantities Rs and Rn can be represented by the following equations:

Rs = Qmeas _,s + _Qhyst – Qoffset _temp … (1)

Rn = Q _meas,n -Qoffset – Qoffset _temp … (2)

Here, the values Q _meas,s and Q _meas,n represent the measured quality of the reference signal receiving power (RSRP) used by the serving cell and the candidate cell, respectively, in the cell selection process, Q _hyst represents the hysteresis value of the cell ranking criterion , Qoffset represents the offset of the cell, and Qoffset _temp represents the offset temporarily applied to the cell. As an option, the parameters used in equation (1) and in equation (2) can be obtained from system messages.

In scenario (c), if the priority level of the target cell is lower than the priority level of the serving cell, the conditions for reselecting the triggering cell are as follows:

(1) Within a predetermined time period, the target cell Srxlev is greater than the second threshold and the serving cell Srxlev is less than the third threshold; And

(2) The UE is camped on the serving cell for at least 1 s.

The Srxlev parameter represents the RX level value of the cell selection, and the second threshold value and the third threshold value set the conditions that the Srxlev parameter for the target cell and the Srxlev parameter for the serving cell must satisfy when the UE reselects a RAT technology/frequency with a lower priority level than the current serving frequency. For example, the second threshold may be represented as Thresh _{Serving, LowP} , and the third threshold may be represented as Thresh _{X, LowP} , in units of dB (dB). Optionally, in embodiments of the present application, the length of said predetermined time period may be defined in accordance with standards, and this predetermined time period may be represented as Treselection _RAT . In different cases, the duration of the specified specified period of time may vary. For example, the length of the predetermined time period may be different in cases where the candidate cell and the serving cell are intra-frequency and inter-frequency cells.

Optionally, the cell reselection criteria is not limited to the above examples, so a number of conditions can also be added or deleted based on the cell reselection criteria in the above examples. As an option, in scenario (a) and scenario (c), the Squal parameter can replace the Srxlev parameter to serve as a condition for cell reselection.

S308. If the UE reselects cell E in the second communication network and then reselects cell F in the first communication network, that UE remains in the RRC_INACTIVE state based on the first UE context.

In a conventional technique, if the UE reselects cell E in the second communication network, that UE clears the first UE context and switches from the RRC_INACTIVE state in the first communication network to the RRC_IDLE state in the second communication network. However, in some embodiments of the present application, after a UE camps in cell E, that UE does not erase the first UE context (in other words, retains the first UE context), and remains in the RRC_INACTIVE state of the first communication network based on this first UE context.

Thereafter, the UE initiates a registration procedure in cell E in the second communication network. If this UE has successfully registered with the second communication network, such UE switches from the RRC_INACTIVE state of the first communication network to the RRC_IDLE state in the second communication network. In other words, in embodiments of the present application, the UE remains in the first communication network from performing the cell reselection procedure in the first communication network until successfully registering with the second communication network.

In some other examples, if the UE reselects a cell (i.e., cell F) in the first communication network before initiating the registration procedure in the second communication network, or if the UE fails to successfully register with the second communication network and reselects cell F in the first communication network, such a UE still remains in the RRC_INACTIVE state in the first communication network based on the first UE context. It should be noted that in the conventional technique, when a UE camps on the second communication network, that UE is in the RRC_IDLE state on the second communication network. When the UE switches from the second communication network to the first communication network, the UE switches to the RRC_IDLE state in the first communication network. Cell F and cell A can be the same cell or different cells. Other content is to be found in the description regarding cell B. Details will not be re-described here.

In addition, for the graphical user interfaces in the UE in this case, refer to the previous description where the UE detaches from the communication network, camps on the second communication network, and then camps on the first communication network again. The details will not be re-described here.

It should be noted that in some other embodiments, when the UE reselects cell E in the second communication network, that UE does not erase the first UE context (in other words, retains this first UE context), and may transition to the RRC_IDLE state in the second communication network. After the UE reselects cell F in the first communication network, the UE may transition to the RRC_INACTIVE state from the RRC_IDLE state based on the first UE context.

Therefore, when the UE first reselects the second communication network and then reselects the first communication network, this UE remains in the RRC_INACTIVE state consistent with the state of this UE registered by the first communication network. In this way, when the first communication network transmits data from the descending line, as well as this first communication network, paging using the Ran Paging message, UE can quickly respond to this Ran Paging message to quickly switch from RRC_INACTIVE to RRC_ConNECT, and then accepts data downlink and transmits uplink data.

The above examples detail scenarios in which the UE remains in the RRC_INACTIVE state in the first communication network. The following examples consider scenarios in which the UE switches from the RRC_INACTIVE state of the first communication network to another state.

In some scenarios, when the UE needs to transmit uplink data to the first communication network, the UE may actively transition to the RRC_CONNECT state from the RRC_INACTIVE state to resume the RRC connection. Alternatively, when the downlink data of the UE needs to be transmitted, the first communication network may page the UE using a RAN Paging message to resume the RRC connection, and the UE will transition to the RRC_CONNECT state from the RRC_INACTIVE state.

In some other scenarios, after the UE disconnects from the communication network and camps on the first communication network again, or after that UE reselects the second communication network but does not register with the second communication network or fails to register and camps again in the first communication network, this UE remains in the RRC_CONNECT state in the first communication network. In FIG. 4 is a flow chart of another method for increasing the UE's response rate to a paging message, according to one embodiment of the present application. In this embodiment of the present application, after step S305 or step S306 or step S308, step S401 and step S402 or step S403 are then carried out. These stages, in particular, are as follows.

S401. When the UE is in the RRC_INACTIVE state, the UE initiates a registration procedure with the first communication network.

S402. After UE accepts a message denoting successful registration in the first communication network, this UE erases the first UE context and switches from the RRC_ConNECT state in the first communication network to the RRC_IDLE state in this first communication network.

In some embodiments, when the UE is in the RRC_INACTIVE state in the first communication network, if the location of the cell in which the UE is camped changes (for example, the TA in which the UE is located has changed), then that UE initiates a registration procedure in the updated location in the first communication networks. Alternatively, the UE periodically initiates a registration procedure at the updated location. Alternatively, when the capabilities of the UE have changed or the user operates the UE (eg, the user shuts down and then restarts the UE, or the user activates the flight mode and then cancels the flight mode), the UE again initiates the registration procedure in the first communication network. After the UE successfully registers with the first communication network again, the UE clears the first UE context (or the second UE context) and switches from the RRC_CONNECT state to the RRC_IDLE state.

S403. After the UE receives an indication from the first communication network to enter the RRC_IDLE state, the UE clears the first UE context and switches from the RRC_CONNECT state of the first communication network to the RRC_IDLE state.

If, in one group of some other cases, when the UE is in the RRC_INACTIVE state in the first communication network, and there is no data transmission between the UE and the first communication network for a second predetermined period of time, the first communication network releases (cancels) the NG connection between the considered UE and the core communication network side, and sends to that UE an indication that it should transition to the RRC_IDLE state (eg, cancel signaling or CN Paging signaling). After the UE receives an indication to enter the RRC_IDLE state, the UE clears the first UE context (or the second UE context) and switches from the RRC_INACTIVE state to the RRC_IDLE state.

In other words, after UE has passed into the RRC_INACTIVE state, even if it has disconnected from the communication network, or this UE makes a re -choice, UE remains in a state of RRC_INACTIVE. The UE switches from the RRC_INACTIVE state to the RRC_CONNECT state only after the UE has successfully registered with the first communication network again. Compared with the conventional technique, embodiments of the present application extend the time period during which the UE is in the RRC_INACTIVE state in a network disconnect or reselection scenario, reduce the slowdown in response to a page message from the communication network due to the inconsistency between the actual state of the UE and the state of this UE registered on the network side and increase the UE's response rate to the paging message from the communication network side.

In yet another group of some other scenarios, it can be understood from the above description that after the UE disconnects from the communication network or reselects the cell and camps in another communication network, for example, in the second communication network, this UE can initiate the registration procedure in the second communication network in order to establish a connection between the UE and the second communication network. In FIG. 5 is a flow chart of another method for increasing the success rate of UE responses to paging messages according to one embodiment of the present application. This method specifically comprises the following steps.

S500. The UE establishes an RRC connection with the first communication network. In this case, the UE is in the RRC_CONNECT state, and the state of this UE registered with the first communication network is also the RRC_CONNECT state. This first communication network is, for example, a 5G communication network.

S501. The first communication network determines that the UE should be instructed to enter the RRC_INACTIVE state.

When there is no data transmission between the UE and the first communication network within the first predetermined time period, the first communication network (which may specifically be, for example, a gNB node network) determines to instruct the UE to enter the RRC_INACTIVE state.

S502. The first communication network sends an indication to the UE to enter the RRC_INACTIVE state, such as RRCConnRelsese (Suspend) cancellation signaling.

S503. The UE transitions to the RRC_INACTIVE state.

In addition, the UE state registered by the first communication network is the RRC_INACTIVE state.

S504. The UE stores the first UE context.

S505. The UE reselects the second communication network.

S506. The UE sends a registration request to the second communication network, eg Tau_Request signaling.

For example, the first communication network is a 5G communication network, and the access network device in this first communication network is a gNB. The second communication network is a LTE network, and the device of access in this second communication network is an ENB unit.

S507. The second communication network registers with itself the UE and returns a registration success response to that UE, eg TAU_ACP signaling.

S508. The UE transitions to the RRC_IDLE state.

S509. The UE clears the first UE context.

In other words, after the UE enters the RRC_INACTIVE state, even if the UE disconnects from the network or the UE reselects, the UE remains in the RRC_INACTIVE state. The UE switches from the RRC_INACTIVE state of the first communication network to the RRC_IDLE state of the second communication network only after the UE has successfully registered with the second communication network. When the UE is started by a service from the second communication network, the UE switches from the RRC_IDLE state to the RRC_CONNECT state. Compared with the conventional technique, embodiments of the present application extend the time period during which the UE is in the RRC_INACTIVE state in a network disconnect or reselection scenario, reduce the slowdown in response to a page message from the communication network due to the inconsistency between the actual state of the UE and the state of this UE registered on the network side and increase the UE's response rate to the paging message from the communication network side.

One embodiment of the present application further provides a system on a chip. As shown in FIG. 6, the system-on-a-chip includes at least one processor 1101 and at least one interface circuit 1102. The processor 1101 and interface circuit 1102 may be connected using a circuit. For example, interface circuitry 1102 may be configured to receive a signal from another device (eg, a storage device in UE 100). In another example, interface circuitry 1102 may be configured to signal to another device (eg, processor 1101). For example, interface circuitry 1102 may read instructions stored in memory and transmit those instructions to processor 1101. When processor 1101 executes these instructions, the UE may perform the steps performed by UE 100 (eg, mobile phone) in the above embodiments. Of course, the system on a chip may additionally contain other discrete devices. This is not specifically limited in the embodiments of the present application.

One embodiment of the present application further proposes a device included in the UE, such that this device has the function of implementing the behavior of the UE when implementing any of the methods described in the previously discussed embodiments. Such a function can be implemented through equipment or appropriate software performed by this equipment. This hardware or software includes at least one module or block corresponding to the above function, such as a communication module or block, a decision module or block, and a switching module or block.

One embodiment of the present application further provides a computer-readable storage medium containing computer instructions, upon execution of which by the UE, the UE performs any of the methods according to the above embodiments.

One of the options for this application further offers a computer software product, so during the operation of this computer software product on a computer, this computer carries out any of the methods according to the above options.

One embodiment of the present application further provides a graphical user interface in a UE, where the UE comprises a display, a video camera lens, a storage device, and one or more processors. These one or more processors are configured to execute one or more computer programs stored in the storage device, and the graphical user interface is a graphical interface presented on the display when the UE performs any of the methods according to the above options.

It can be understood that in order to implement the above functions, the terminal or other similar equipment contains appropriate hardware structures and/or software modules to implement all of these functions. One of ordinary skill in the art will readily understand that the modules and steps of the algorithms in the examples discussed with reference to the embodiments presented herein may be implemented by hardware or a combination of hardware and computer software according to the embodiments of the present application. Whether these functions are implemented by hardware or by hardware controlled by computer software depends on the particular applications and design constraints for the technical solutions. A person skilled in the art will be able to use various methods to implement the described functions for each particular application, but he should not consider that such an implementation is outside the scope of the embodiments of the present invention.

In embodiments of the present application, the division of functional modules can be made for a terminal or similar equipment based on the above examples of the method. For example, functional modules may be obtained by a one-to-one split with functions, or two or more functions may be integrated in one processor module. An integrated module may be implemented in the form of hardware, or may be implemented in the form of a functional software module. It should be noted that the partitioning of modules in embodiments of the present invention is only one example and is simply a partitioning of logical functions. In the actual implementation, other partitioning methods are also possible.

From the description of the above embodiments, a person skilled in the art can clearly understand that for convenience and brevity of the description, the above is just an example of a breakdown of functional modules. In a real application, functions can be assigned to other functional modules if desired, in other words, the internal structure of the device can be broken down into different functional modules to perform all or some of the functions discussed above. Detailed descriptions of the operating procedures of systems, devices and modules can be found by referring to the respective procedures in the above embodiments of the method. The details will not be re-described here.

Functional modules in the options of this application can be integrated in one processor module, or each of these modules can exist physically separately, or two or more modules can be integrated in one module. Such an integrated module may be implemented in the form of hardware, or may be implemented in the form of a functional software module.

When implemented as a functional software module and sold or used as a standalone product, the integrated module may be stored on a computer-readable storage medium. Based on such an understanding, a substantial part of the technical solutions of the variants of the present application, or a part of such technical solutions used in the known art, or some or all of such technical solutions can be implemented in the form of a software product. Such a computer software product is saved on a medium for storing information. This product contains a set of instructions that cause a computing device (eg, a personal computer, server, or network device) or processor to perform all or some of the steps of the method discussed in the embodiments of this application above. Such an information storage medium is any medium capable of storing program code, such as a flash memory device, a removable hard disk drive, a read only memory device, a random access memory device, a magnetic disk, or an optical disk.

The material set forth above is merely a description of specific embodiments of the present application and is not intended to limit the scope of protection of the present application. Any variations or substitutions within the technical scope of this application shall fall within the protection scope of this application. Therefore, the volume of protection of this application must correspond to the volume of protection of the invention formula.

Claims (23)

1. A method for maintaining the consistency of the actual state of the user equipment, UE, with the state of this UE registered on the network side, comprising: camping, by the UE, in the first cell of the first communication network, where the UE is in a radio resource control, RRC connected state; in response to an indication of the RRC sleep state that is received from the access network device, transition by the UE to the RRC sleep state; And when a given condition is satisfied, consolidation through UE in the second cell of the first communication network, where UE is in an inactive state of RRC, and the first cell and the second cell are the same cell or different cells in which camping by the UE in the second cell of the first communication network, when a predetermined condition is satisfied and the UE is in the RRC dormant state, comprises: after the predetermined condition is satisfied, camping by the UE first in the third cell of the second communication network, and then in the second cell of the first communication network, in which the UE is in the RRC dormant state; or when the UE determines that the signal from the first cell satisfies the cell reselection criteria, reselection by the UE first of the third cell in the second communication network and then of the second cell in the first communication network, while the UE is in the RRC idle state, and the type of the second communication network different from the type of the first communication network. 2. The method of claim 1, wherein said predetermined condition comprises: the UE determines that the first cell signal does not satisfy the persistence condition; or the UE has restarted; or the UE activates the flight mode and then cancels the flight mode. 3. The method according to any one of paragraphs. 1–2, in which consolidation by means of UE is in the second cell of the first communication network, when a given condition is satisfied, and at the same time UE is in an inactive state of RRC, contains: when the predetermined condition is satisfied, camping by the UE in the second cell of the first communication network without the UE entering the RRC idle state; or When a given condition is satisfied, fixing through UE in the second cell of the first communication network and the transition to the RRC waiting state and then to the inactive state of the RRC. 4. The method according to any one of paragraphs. 1-3, in which, after fixing through UE, in the second cell of the first communication network, and when UE is in an inactive state of RRC, the method additionally contains: in response to the first RAN page message sent by the access network device and received by the UE, resuming, by the UE, an RRC connection with said access network device, and switching from the RRC dormant state to the RRC connected state. 5. The method according to any one of paragraphs. 1-4, wherein the method further comprises: when UE is fixed in the second cell of the first communication network and UE is in an inactive state of RRC, the transfer of UE request for registration to the device of access; And in response to a registration success response received from the access network device, erasing by the UE the UE context related to this UE in the RRC dormant state and entering the RRC idle state. 6. The method according to any one of paragraphs. 1-5, wherein the method further comprises: when the UE camps on the second cell of the first communication network and the UE is in the RRC idle state, receiving by the UE a second message transmitted by the access network device, where the second message is used to indicate to the UE that it should enter the RRC idle state; Washing through UE context UE related to this UE in an inactive state of RRC, and switching to the RRC waiting state. 7. The method of claim 6, wherein the indication for transitioning to the RRC idle state comprises a cancel signaling and a core communications network paging message, where the cancel signaling does not contain a suspend configuration. 8. The method according to any one of paragraphs. 1-7, wherein the method further comprises: when UE is fixed in the second cell of the first communication network and UE is in an inactive state of RRC, taking by UE user operation; transmission by means of UE Request for the renewal of the RRC connection to the device of access; switching this UE from the idle RRC state to the connected RRC state; and transmitting, by the UE, the uplink data to the access network device. 9. User equipment, UE, containing a processor and a memorable device where this memorable device is connected to the processor, the memorable device is configured to save computer software codes, these computer software codes contain computer commands where, when these computer commands, UE operations for UE according to which - either one of paragraphs. 1–8. 10. A carrier readable by the computer for storing information containing computer commands where, when these computer commands are executed by an electronic device, this electronic device provides a method for any one of the paragraphs. 1–10. 11. User equipment, UE containing one or more processors, where, when these one or more command processors are performed, these one or more processors carry out a method for any one of the paragraphs. 1–8.

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