CN108616880B

CN108616880B - Data transmission method, device and system

Info

Publication number: CN108616880B
Application number: CN201710036362.XA
Authority: CN
Inventors: 牛丽; 吴昱民
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2017-01-17
Filing date: 2017-01-17
Publication date: 2022-07-29
Anticipated expiration: 2037-01-17
Also published as: WO2018133607A1; CN108616880A

Abstract

The invention discloses a method, a device and a system for data transmission; the data transmission method comprises the following steps: and the UE processes the sending data in a preset state by adopting a preset configuration mode, wherein the preset state refers to a state that an interface between the UE and the base station is disconnected and the interface between the base station and the core network is kept connected. The invention provides a processing mode of the UE for the transmitted data in the preset state, thereby realizing the convenience for adapting to the mobility of the UE in the preset state when the preset state adopts an unauthorized transmission mode.

Description

Data transmission method, device and system

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a method, an apparatus, and a system for data transmission.

Background

The Long Term Evolution system (LTE) mainly includes the following three parts: user Equipment (UE), a Core Network (CN), and a base station (eNB). Among them, a Mobility Management Entity (MME) in the core network is mainly responsible for transmission of signaling, and a Serving GateWay (SGW) is mainly responsible for transmission of data. The interface between the UE and the eNB is Uu port, the enbs are connected to each other through X2 port, and the interface between the eNB and the core network is S1 port, as shown in fig. 1. The E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) includes a plurality of enbs.

The protocol architecture of the UE, eNB and MME is shown in fig. 2. For the UE, a Protocol Layer RRC (Radio Resource Control), PDCP (Packet Data Convergence Protocol), RLC (Radio Link Control), MAC (Medium Access Control), and PHY (Physical Layer) belong to an AS (Access Stratum), and an upper Layer of the AS is an NAS (Non Access Stratum).

According to the current protocol, a UE needs to communicate with an eNB, and first accesses the eNB, that is, initiates a random access procedure. As shown in fig. 3, the Random Access (Random Access) procedure includes the following four steps:

step 301: the UE acquires an available Preamble sequence (Preamble) for random access and a time-frequency position for sending the Preamble sequence through system information or RRC signaling, randomly selects the Preamble sequence and the time-frequency position for sending the Preamble sequence in available resources, and sends the Preamble sequence to the eNB;

step 302: the eNB deduces RA-RNTI (Random Access Radio Network Temporary Identity) which is possibly adopted by the UE through a time-frequency position adopted by the Random Access preamble sequence, decodes the preamble sequence by using the RA-RNTI, and replies a Random Access response to the UE after the eNB successfully decodes the preamble sequence, wherein the Random Access response carries information such as uplink authorization and the like;

step 303: the UE sends uplink data on the uplink authorized resource and carries information such as the identification of the UE;

step 304: the eNB analyzes the uplink data on the uplink authorized resource, confirms the UE, resolves the conflict and sends a competition resolution identifier to the UE.

However, the above process is delayed for a long time, and the non-orthogonal technology is currently approved by various companies, so the random access process is also technically updated, and can be simplified to a two-step process. The UE may send data to the eNB without authorization. As shown in fig. 4, the procedure of unlicensed uplink transmission includes the following two steps:

step 401: the UE selects resources from the unauthorized resources and transmits uplink data;

step 402: and the eNB resolves the uplink data and replies a response or data.

Wherein, this scheme can include two kinds of modes: one is that the UE transmits a preamble sequence while transmitting uplink data; the other is that the UE transmits only uplink data.

It can be seen that, compared to the random access procedure shown in fig. 3, the procedure of sending uplink data without authorization shown in fig. 4 has smaller delay and is more flexible. When the UE is in the inactive state, the Uu port connection between the UE and the base station is already disconnected, but the S1 port connection of the UE is still maintained, the UE may use this unauthorized method for sending uplink data, so as to reduce the delay of the data packet and reduce the signaling load.

However, the data sent by the UE in the inactive state in the unauthorized transmission mode is different from the data sent by the UE in the conventional connected state, and the UE is mobile in the inactive state and can reselect to another cell, and the data sent by the UE in the other cell in the unauthorized mode is different from the data sent by the UE in the connected state. In addition, the UE sends many packets, which may maximize the COUNT value used by the PDCP layer of the service, causing the key to be updated.

Disclosure of Invention

The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

The embodiment of the invention provides a method, a device and a system for data transmission, and provides a processing mode of UE (user equipment) on transmitted data in a preset state.

The embodiment of the invention provides a data transmission method, which comprises the following steps: the UE processes the sending data in a preset state by adopting a preset configuration mode; the preset state refers to a state that an interface between the UE and the base station is disconnected and the interface between the base station and the core network is kept connected.

The processing, by the UE, of the transmission data in the preset state in the preset configuration mode may include: and the UE processes the sending data on the user plane according to the stored configuration mode of the radio bearer in the connection state in a preset state.

Wherein, in the preset state, the UE processes the transmission data in the user plane according to the stored configuration mode of the radio bearer in the connection state, and the processing may include:

the UE performs at least one of the following operations on the radio bearer capable of supporting transmission:

resetting the MAC layer; maintaining a PDCP layer state; keeping the state of an RLC layer; suspending the radio bearer; default configuration parameters are applied at the MAC layer and PHY.

Wherein the maintaining of the PDCP layer state may include: maintaining a PDCP SN, a COUNT value, a Next hop Link COUNT (NCC), a robust header compression (ROHC) status, and PDCP configuration information;

the maintaining the RLC state may include: RLC SN, RLC mode, and RLC configuration information is maintained.

The processing, by the UE, of the transmission data in the preset state in the preset configuration mode may include: and the UE processes the sending data according to a preset radio bearer configuration mode on a user plane in a preset state.

Wherein, in a preset state, the UE processes the transmission data in a user plane according to a predetermined configuration mode of a radio bearer, and the processing may include:

resetting the MAC layer; reconstructing an RLC layer; rebuilding a PDCP layer; suspending the radio bearer; updating the key; applying configuration parameters of a non-acknowledgement (UM) mode at the PDCP layer; applying configuration parameters of UM mode in RLC layer; default configuration parameters are applied at the MAC layer and PHY.

The processing, by the UE, of the transmission data in the preset state in the preset configuration mode may include: the UE processes the sending data on the user plane according to the configuration mode of the wireless bearer of the target base station in a preset state; and the target base station is a base station which is possibly reselected by the UE.

Wherein, in a preset state, the UE processes the transmission data in a user plane according to a configuration mode of a radio bearer of a target base station, and the processing may include:

resetting the MAC layer; reconstructing an RLC layer; rebuilding a PDCP layer; suspending the radio bearer; updating the key; applying configuration parameters of a target base station on a PDCP layer; applying configuration parameters of a target base station on an RLC layer; default configuration parameters are applied at the MAC layer and PHY.

Wherein the radio bearer may include at least one of: DRB, SRB.

The data transmission method may further include:

and when the UE is in the preset state and the COUNT value used by the PDCP layer of any DRB or SRB reaches the COUNT value triggering the UE to apply for updating the key, the UE initiates a key updating process.

The COUNT value triggering the UE to apply for key update is preset, or is broadcasted by the base station through system information, or is configured by the base station through RRC signaling.

Wherein, the UE initiates a key update procedure, which may include:

and the UE sends RRC signaling, wherein the RRC signaling carries a key updating request.

Wherein the RRC signaling may include one of: RRC connection reestablishment request message (rrcconnectionresemblingrequest), RRC connection resume request message (rrcconnectionresumerrequest), and a new message defined by a user.

The data transmission method may further include:

UE receives a paging message carrying key updating indication information;

after receiving the paging message, the UE performs at least one of the following operations:

resetting the MAC layer; reconstructing an RLC layer; updating the key; setting a COUNT value used by the PDCP layer to 1; configuring a PDCP layer and an RLC layer according to a configuration mode stored in a preset state; applying default configuration parameters at the MAC layer and PHY;

after performing the above operations, the UE remains in a preset state.

The data transmission method may further include:

the UE receives an RRC connection reconfiguration message carrying key updating indication information;

after receiving the RRC connection reconfiguration message, the UE performs at least one of the following operations:

after the above operations are performed, the UE sends an RRC connection reconfiguration complete message to the base station in an unauthorized transmission manner, and keeps in a preset state.

The data transmission method may further include:

resetting the MAC layer; reconstructing an RLC layer; rebuilding a PDCP layer; updating the configuration mode of the preset state according to the configuration information carried in the RRC connection reconfiguration message;

after the above operations are executed, the UE sends an RRC connection reconfiguration complete message to the base station of the target cell in an unauthorized transmission manner, switches to the target cell, and enters a connected state.

After the sending data is processed in the preset configuration mode, the data transmission method may further include: and the UE transmits the sending data by adopting an unauthorized transmission mode.

The embodiment of the invention also provides a data transmission method, which comprises the following steps:

the method comprises the steps that a base station indicates a configuration mode of a preset state to UE so that the UE processes and sends data in the preset state by adopting the configuration mode, wherein the preset state refers to a state that an interface between the UE and the base station is disconnected and the interface between the base station and a core network is kept connected.

The data transmission method may further include: and the base station indicates the UE to enter a preset state.

The data transmission method may further include:

the base station sends a COUNT value triggering the UE to apply for the key update through system information broadcasting or RRC signaling, so that the UE in a preset state initiates a key update process when the COUNT value used by the PDCP layer of any DRB or SRB reaches the COUNT value triggering the UE to apply for the key update.

The data transmission method may further include:

after receiving the key update request sent by the UE, the base station judges whether the COUNT value used by any DRB or PDCP layer of the SRB of the UE reaches the COUNT value for triggering the UE to apply for the key update, if so, the base station sends a reply response message to the UE, wherein the reply response message carries key update indication information.

The data transmission method may further include:

the base station monitors a COUNT value used by a PDCP layer of any DRB or SRB of the UE;

when monitoring that a COUNT value used by a PDCP layer of any DRB or SRB of the UE in a preset state reaches a COUNT value triggering the UE to apply for key updating, the base station informs the UE of updating the key through a paging message, wherein the paging message carries key updating indication information; or the base station informs the UE of updating the key through an RRC connection reconfiguration message, wherein the RRC connection reconfiguration message carries key updating indication information.

The embodiment of the invention also provides a data transmission device, which is applied to the UE and comprises the following steps:

the first processing module is used for processing the sending data by adopting a preset configuration mode when the UE is in a preset state; the preset state refers to a state that an interface between the UE and the base station is disconnected and the interface between the base station and the core network is kept connected.

The first processing module is configured to process the transmission data in a preset configuration manner by at least one of the following manners:

processing the sending data on the user plane according to the stored configuration mode of the radio bearer in the connection state;

processing the sending data according to a preset radio bearer configuration mode on a user plane;

and processing the sending data in the user plane according to the configuration mode of the radio bearer of the target base station.

Wherein the apparatus for data transmission may further include:

and the second processing module is used for initiating the key updating process when the UE is in the preset state and the COUNT value used by the PDCP layer of any DRB or SRB reaches the COUNT value triggering the UE to apply for the key updating.

Wherein the apparatus for data transmission may further include:

a receiving module, configured to receive a paging message carrying key update indication information, or receive an RRC connection reconfiguration message carrying key update indication information;

a third processing module, configured to, after the receiving module receives the paging message, perform at least one of the following operations: resetting the MAC layer; reconstructing an RLC layer; updating the key; setting a COUNT value used by the PDCP layer to 1; configuring a PDCP layer and an RLC layer according to a configuration mode stored in a preset state; applying default configuration parameters at the MAC layer and PHY; and after the above operation is performed, maintaining the state in a preset state;

or, after the receiving module receives the RRC connection reconfiguration message, perform at least one of the following operations: resetting the MAC layer; reconstructing an RLC layer; updating the key; setting a COUNT value used by the PDCP layer to 1; configuring a PDCP layer and an RLC layer according to a configuration mode stored in a preset state; applying default configuration parameters at the MAC layer and PHY; and after the operation is executed, sending an RRC connection reconfiguration completion message to the base station by adopting an unauthorized transmission mode, and keeping the RRC connection reconfiguration completion message in a preset state.

Wherein the apparatus for data transmission may further include: and the transmitting module is used for transmitting the sending data in an unauthorized transmission mode.

The embodiment of the invention also provides a data transmission device, which is applied to a base station and comprises the following components:

the first indication module is configured to indicate a configuration mode of a preset state to User Equipment (UE) so that the UE processes transmission data in the preset state by using the configuration mode, where the preset state refers to a state where an interface between the UE and a base station is disconnected and an interface between the base station and a core network is kept connected.

Wherein the apparatus for data transmission may further include:

and the second indicating module is used for indicating the UE to enter a preset state.

Wherein the apparatus for data transmission may further include:

a first transmission module, configured to send, through system information broadcast or RRC signaling, a COUNT value triggering UE to apply for key update, so that when the COUNT value used by a PDCP layer of any DRB or SRB reaches the COUNT value triggering UE to apply for key update, the UE in a preset state initiates a key update process.

Wherein the apparatus for data transmission may further include:

a request receiving module, configured to receive a key update request sent by the UE;

a determining module, configured to determine, after the request receiving module receives the key update request sent by the UE, whether a COUNT value used by a PDCP layer of any DRB or SRB of the UE reaches a COUNT value that triggers the UE to apply for key update;

and a second transmission module, configured to send a reply response message to the UE when the result of the determining module is yes, where the reply response message carries key update indication information.

Wherein, the apparatus for data transmission may further include:

a monitoring module, configured to monitor a COUNT value used by a PDCP layer of any DRB or SRB of the UE;

a notification module, configured to notify, when the monitoring module monitors that a COUNT value used by any DRB or PDCP layer of an SRB of the UE in a preset state reaches a COUNT value that triggers the UE to apply for key update, the UE of a key update through a paging message, where the paging message carries key update indication information; or notifying the UE to update the key through an RRC connection reconfiguration message, wherein the RRC connection reconfiguration message carries key update indication information.

An embodiment of the present invention further provides a system for data transmission, including: a UE and a base station;

the base station is used for indicating a preset configuration mode to the UE;

the UE is used for processing the sending data in a preset state by adopting the configuration mode;

the preset state refers to a state that an interface between the UE and the base station is disconnected and the interface between the base station and the core network is kept connected.

In addition, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, the computer-executable instructions implement a method applied to data transmission on a UE side.

An embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, the computer-executable instructions implement a method for data transmission applied to a base station side.

In this embodiment, the UE processes the transmission data in a preset state by using a preset configuration mode, where the preset state refers to a state where an interface between the UE and the base station is disconnected and an interface between the base station and the core network is kept connected. The embodiment provides a processing mode of the UE for the sent data in the preset state, and further realizes that the UE is convenient to adapt to the mobility of the UE in the preset state when the preset state adopts an unauthorized transmission mode.

In some implementation manners, when the UE is in a preset state and a COUNT value used by a PDCP layer of any DRB or SRB reaches a COUNT value that triggers the UE to apply for key update, a key update process is performed, thereby implementing timely key update.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the claimed subject matter and are incorporated in and constitute a part of this specification, illustrate embodiments of the subject matter and together with the description serve to explain the principles of the subject matter and not to limit the subject matter.

Fig. 1 is an architecture diagram of LTE;

FIG. 2 is a protocol architecture diagram of a UE, eNB and MME;

fig. 3 is a flow chart of random access in LTE;

FIG. 4 is a flow chart of an unlicensed uplink transmission;

fig. 5 is a flowchart of a method for data transmission according to an embodiment of the present invention;

fig. 6 is a flowchart of another data transmission method according to an embodiment of the present invention;

fig. 7 is a schematic diagram of an apparatus for data transmission according to an embodiment of the present invention;

fig. 8 is a first schematic diagram of another apparatus for data transmission according to an embodiment of the present invention;

fig. 9 is a second schematic diagram of another data transmission apparatus according to an embodiment of the present invention.

Detailed Description

The embodiments of the present application will be described in detail below with reference to the accompanying drawings, and it should be understood that the embodiments described below are only for illustrating and explaining the present application and are not intended to limit the present application. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.

An embodiment of the present invention provides a method for data transmission, as shown in fig. 5, including:

step 501: the UE processes the sending data in a preset state by adopting a preset configuration mode;

the preset state refers to a state that an interface between the UE and the base station is disconnected and the interface between the base station and the core network is kept connected. For example, in LTE, the interface between the UE and the base station is Uu port, and the interface between the base station and the core network is S1 port, that is, when the UE is in the preset state, the Uu port of the UE is disconnected and the S1 port remains connected.

In some implementations, step 501 may include:

and the UE processes and sends data on the user plane according to the stored configuration mode of the radio bearer in the connection state in a preset state.

In this implementation, for a radio bearer that can support transmission, the UE may perform at least one of the following operations:

In this implementation manner, maintaining the PDCP layer state may include: maintaining a PDCP Sequence Number (SN), a COUNT value, a next hop link COUNT (NCC), a Robust Header Compression (ROHC) state, and PDCP configuration information;

maintaining the RLC state may include: RLC SN, RLC mode, and RLC configuration information are maintained.

In this implementation, the radio bearer may include at least one of: data Radio Bearer (DRB), Signaling Radio Bearer (SRB).

In some implementations, step 501 may include:

and the UE processes and sends data according to a preset radio bearer configuration mode on a user plane in a preset state.

In this implementation, the radio bearer may include at least one of: DRB, SRB.

In some implementations, step 501 may include:

the UE processes and sends data on a user plane according to the configuration mode of the wireless bearer of the target base station in a preset state; the target base station is a base station which is possibly reselected by the UE.

In this implementation, the UE performs at least one of the following operations on a radio bearer capable of supporting transmission:

resetting the MAC layer; reconstructing an RLC layer; rebuilding a PDCP layer; suspending the radio bearer; updating the key; applying configuration parameters of a target base station at a PDCP layer; applying configuration parameters of a target base station on an RLC layer; default configuration parameters are applied at the MAC layer and PHY.

In this implementation, the radio bearer may include at least one of: DRB, SRB.

In some implementations, the method for data transmission provided by this embodiment may further include:

and when the UE is in a preset state and the COUNT value used by the PDCP layer of any DRB or SRB reaches the COUNT value triggering the UE to apply for updating the key, the UE initiates a key updating process.

In this implementation, the COUNT value triggering the UE to apply for the key update may be preset, or may be broadcasted by the base station through system information, or configured by the base station through RRC signaling.

In this implementation, the UE initiating the key update process may include:

the UE sends Radio Resource Control (RRC) signaling, where the RRC signaling carries a key update request.

UE receives a paging message carrying key updating indication information;

after receiving the paging message carrying the key updating indication information, the UE performs at least one of the following operations:

after performing the above operations, the UE remains in the preset state.

after receiving the RRC connection reconfiguration message carrying the key updating indication information, the UE performs at least one of the following operations:

resetting the MAC layer; reconstructing an RLC layer; updating the key; setting a COUNT value used by the PDCH layer to 1; configuring a PDCP layer and an RLC layer according to a configuration mode stored in a preset state; applying default configuration parameters at the MAC layer and PHY;

In some implementations, after step 501, the method for data transmission provided in this embodiment may further include:

step 502: and the UE transmits the processed sending data in an unauthorized transmission mode.

The present application is illustrated below by means of a number of examples. It should be noted that, in the following embodiment, it is assumed that the UE is in a preset state, in which the Uu port of the UE is disconnected and the S1 port is kept connected.

Example one

In this embodiment, when the UE performs unauthorized transmission in the preset state, the user plane may process the data packet according to the configuration of the DRB and the SRB in the original connection state.

When the base station indicates the UE to enter the preset state, the base station configures which services of the UE can support unauthorized transmission according to the capability of the UE and the type of the services. For example, for a certain UE, the base station indicates the UE to enter a preset state through an RRC message, and the RRC message carries a DRB list and an SRB list (list) that can support unlicensed transmission, where the RRC message may include one of: RRC connection release message (RRCConnectionRelease), RRC connection reconfiguration message (RRCConnectionReconfiguration), RRC connection reestablishment message (RRCConnectionReestablishment), and a customized new message.

When the UE is in the preset state, the UE may save the context in the original connection state and the configuration modes of the DRB and the SRB. When the base station configures certain DRBs and SRBs of the UE to support unauthorized transmission, the UE performs operations of resetting the MAC layer and maintaining the states of the RLC layer and the PDCP layer on the DRBs and SRBs. For example, for a certain UE, after receiving an RRC message from a base station, the UE performs the following operations on a DRB and an SRB that can support unauthorized transmission according to a stored configuration mode in a connected state: resetting the MAC layer; maintaining a PDCP layer state; keeping the state of an RLC layer; suspending the DRB and SRB; default configuration parameters are applied at the MAC layer and PHY, etc. Wherein maintaining the PDCP layer state may include: maintaining PDCP Sequence Numbers (SNs), COUNT values, NCCs (next Hop Chaining COUNTs), ROHC (Robust Header Compression) states, PDCP configuration information, etc.; maintaining the RLC layer state may include: RLC SN, RLC mode, RLC configuration information, etc. are maintained.

Example two

In this embodiment, when the UE performs unauthorized transmission in the preset state, the user plane packet may be processed according to the predetermined configuration manner of the DRB and the SRB.

When the base station configures the UE to enter a preset state, the base station configures which services of the UE can support unauthorized transmission according to the capability and the service type of the UE, and configures a processing mode of a data packet in an unauthorized state. In the course of unauthorized transmission, a specific processing method, such as UM mode, can be used to reduce complexity. For example, for a certain UE, the base station configures the UE to enter a preset state through an RRC message, where the RRC message carries a DRB and an SRB list that can support unauthorized transmission, and configuration modes of the DRB and the SRB, where the configuration modes may include a PDCP configuration mode in an UM mode and an RLC configuration mode in an UM mode, and may also carry key update information ncc (nexthopchainingcount); wherein the RRC message may include one of: RRC connection release message (RRCConnectionRelease), RRC connection reconfiguration message (RRCConnectionReconfiguration), RRC connection reestablishment message (RRCConnectionReestablishment), and a customized new message.

When the UE is in the preset state and some DRBs and SRBs of the UE configured by the base station support unauthorized transmission, the UE may perform operations of resetting the MAC layer, re-establishing the RLC layer, re-establishing the PDCP layer, and applying new configuration parameters to the DRBs and SRBs. For example, for a certain UE, the UE receives an RRC connection reconfiguration message from the base station, and performs the following operations on the DRBs and SRBs capable of supporting unauthorized transmission according to the configuration mode carried in the RRC connection reconfiguration message: resetting the MAC layer; reconstructing an RLC layer; rebuilding a PDCP layer; suspending the DRB and SRB; updating the key; applying configuration parameters of the UM mode at the PDCP layer; applying configuration parameters of UM mode in RLC layer; default configuration parameters are applied at the MAC layer and PHY, etc.

EXAMPLE III

In this embodiment, when the UE performs unauthorized transmission in the preset state, the user plane may process the data packet according to the configuration mode of the target base station.

And the original base station judges a target base station to which the UE possibly moves according to the measurement report of the UE, and acquires the configuration mode of the UE in the target base station. And the original base station is reconfigured to the UE through RRC signaling.

The target base station configures which services of the UE can support unauthorized transmission according to the characteristics of the UE and the self condition, and configures a processing mode of a data packet in an unauthorized state. For example, for a certain UE, the original base station configures the UE to enter a preset state through an RRC message, where the RRC message carries a target base station list that can support the preset state, and the configuration parameters of each target base station may include: DRB and SRB list which can support unauthorized transmission, and the configuration of these DRB and SRB, and can also carry key update information ncc (nexthopchainingcount). Wherein the RRC message may include one of: RRC connection release message (RRCConnectionRelease), RRC connection reconfiguration message (RRCConnectionReconfiguration), RRC connection reestablishment message (RRCConnectionReestablishment), and a customized new message.

When the UE is in the preset state and the original base station configures that some DRBs and SRBs of the UE in the target base station support unauthorized transmission, the UE may perform operations of resetting the MAC layer, reconstructing the RLC layer, reconstructing the PDCP layer, and applying the configuration parameters of the target base station on the DRBs and SRBs. For example: for a certain UE in a preset state, if the UE has data transmission and the UE selects a certain target base station, the UE performs the following operations on the DRB and the SRB that can support unauthorized transmission according to the configuration mode of the target base station: resetting the MAC layer; reconstructing an RLC layer; rebuilding a PDCP layer; suspending the DRB and SRB; updating the key; applying configuration parameters of a target base station at a PDCP layer; applying configuration parameters of a target base station on an RLC layer; default configuration parameters are applied at the MAC layer and PHY, etc.

Example four

In this embodiment, when the UE is in the preset state, the COUNT value used by the PDCP layer of a certain DRB or SRB may reach the maximum value, and needs to be turned, where the turning of the COUNT value may cause the key to be updated. At this time, the UE may apply for an update key from the base station.

The base station can trigger the UE to apply for the COUNT value of the key updating through system information broadcasting or RRC signaling configuration, and when the COUNT value used by a certain DRB or PDCP layer of the SRB of the UE reaches the COUNT value triggering the UE to apply for the key updating, the UE applies for the updating key from the base station. Or, determining a COUNT value triggering the UE to apply for the key update in a predefined manner, and when the COUNT value used by the PDCP layer of a certain service of the UE reaches the COUNT value triggering the UE to apply for the key update, the UE applies for the update key from the base station.

The UE applies for an update key from the base station. The UE sends an RRC signaling to the base station, where the RRC signaling may carry a key update request. Wherein the RRC signaling may include one of: RRC connection reestablishment request message (RRCConnectionReestablishmentRequest), RRC connection resumption request message (rrcconnectionresumerrequest), and a custom new message.

After receiving a key updating request sent by the UE, the base station judges whether a COUNT value used by a certain DRB or PDCP layer of the SRB of the UE is about to be turned over, if so, initiates a response message to the UE, and indicates a new NCC in the response message.

EXAMPLE five

In this embodiment, the base station may also initiate a key update in view of the fact that the COUNT values of the base station and the UE are synchronized.

When the base station monitors that a COUNT value used by a certain DRB or PDCP layer of the SRB of the UE is about to be turned over and the UE is in a preset state, the base station may prompt the UE to update the key through a paging message. The base station adds the identity of the UE that needs to update the key to the paging message, and the paging message may also add key update indication information, such as NCC.

If the UE in the preset state receives the paging message belonging to the UE and the paging message carries the key updating indication information, the RRC layer of the UE indicates the PDCP layer to update the key. For example, the UE may perform the following operations: resetting the MAC layer, rebuilding the RLC layer, updating the key, and setting the COUNT value used by the PDCP layer to 1; configuring a PDCP layer and an RLC layer according to a configuration mode stored in a preset state; applying default configuration parameters at the MAC layer and PHY; also, the UE continues to remain in the preset state after performing the above-described operations.

EXAMPLE six

In this embodiment, when the UE performs unauthorized transmission in the preset state, the COUNT value used by the PDCP layer of a certain DRB or SRB may reach the maximum value and needs to be turned over, and the base station may update the key through RRC signaling and instruct the UE to continue to remain in the preset state.

For a certain UE, when the access is in a preset state, a cell is selected and unauthorized transmission is carried out, and when the COUNT value used by the PDCP layer of a certain DRB or SRB is about to reach the maximum value, the base station can decide to update the key, send RRC signaling (such as RRC connection reconfiguration message) to the UE and inform the UE of updating the key.

After receiving the RRC connection reconfiguration message, the UE may perform the following operations: resetting the MAC layer; reconstructing an RLC layer; updating the key; setting a COUNT value used by the PDCP layer to 1; configuring a PDCP layer and an RLC layer according to a configuration mode stored in a preset state; applying default configuration parameters at the MAC layer and PHY; subsequently, the UE may send an RRC connection reconfiguration complete message to the base station by using an unauthorized transmission method, and continue to maintain the RRC connection reconfiguration complete message in the preset state.

EXAMPLE seven

In this embodiment, when the UE is in the preset state, the UE performs cell reselection, selects a new cell, and performs unauthorized transmission. The target cell receives the uplink data packet of the UE, finds the original cell of the UE according to the information such as the UE identifier carried in the uplink data packet, and transmits the uplink data packet of the UE to the original cell through an X2 port.

If the original cell determines that the COUNT value used by a DRB or PDCP layer of an SRB of the UE may reach the maximum value, and needs to be turned over, the original cell may initiate a handover procedure of X2. Firstly, an original cell sends a switching request to a target cell; if the target cell agrees to switch, returning a switching confirmation message to the original cell; the original cell generates an RRC connection reconfiguration message for indicating switching to the target cell for the UE, and transmits the RRC connection reconfiguration message to the target cell through an X2 port; and the target cell sends the RRC connection reconfiguration message to the UE through downlink feedback sent by the unauthorized uplink.

After receiving the RRC connection reconfiguration message, the UE performs a handover procedure to the target cell, and may perform the following operations: resetting the MAC layer; an RLC layer is reestablished; rebuilding a PDCP layer; updating the configuration mode of a preset state according to configuration information carried in the RRC connection reconfiguration message; then, the UE may send an RRC connection reconfiguration complete message to the base station of the target cell by using an unauthorized transmission method, and enter a connected state.

In summary, the present embodiment proposes a processing method for sending data when the UE adopts an unauthorized transmission method in the preset state, so as to adapt to the mobility of the UE in the active state and update the key in time.

In addition, an embodiment of the present invention further provides a data transmission method, as shown in fig. 6, including:

step 601: the base station indicates the configuration mode of the preset state to the UE so that the UE adopts the configuration mode to process and send data in the preset state;

The data transmission method provided by this embodiment may further include:

step 600: and the base station indicates the UE to enter a preset state.

the base station sends a COUNT value triggering the UE to apply for the key update through system information broadcast or RRC signaling, so that the UE in a preset state initiates a key update process when the COUNT value used by the PDCP layer of any DRB or SRB reaches the COUNT value triggering the UE to apply for the key update.

after receiving a key updating request sent by the UE, the base station judges whether the COUNT value used by any DRB or PDCP layer of the SRB of the UE reaches the COUNT value for triggering the UE to apply for key updating, if so, a reply response message is sent to the UE, wherein the reply response message carries key updating indication information.

when monitoring that a COUNT value used by any DRB or PDCP layer of SRB of the UE in a preset state reaches a COUNT value triggering the UE to apply for updating a key, a base station informs the UE to update the key through a paging message, wherein the paging message carries key updating indication information; or the base station informs the UE of updating the key through an RRC connection reconfiguration message, wherein the RRC connection reconfiguration message carries key updating indication information.

In addition, for a detailed description of the data transmission method provided in this embodiment, reference may be made to the first to seventh embodiments, and therefore, the detailed description is not repeated herein.

In addition, an embodiment of the present invention further provides a data transmission apparatus, as shown in fig. 7, which is applied to a UE, and includes:

a first processing module 701, configured to process, when the UE is in a preset state, data to be sent in a preset configuration mode;

In some implementations, the first processing module 701 may be configured to process the sending data in a preset configuration manner by at least one of the following manners:

processing the sending data in the user plane according to the configuration mode of the preset radio bearer;

In some implementations, the apparatus for data transmission provided in this embodiment may further include:

the second processing module 702 is configured to initiate a key update process when the UE is in a preset state and a COUNT value used by a PDCP layer of any DRB or SRB reaches a COUNT value that triggers the UE to apply for key update.

The COUNT value triggering the UE to apply for key update may be preset, or broadcasted by the base station through system information, or configured by the base station through RRC signaling.

a receiving module 703, configured to receive a paging message carrying key update indication information, or receive an RRC connection reconfiguration message carrying key update indication information;

a third processing module 704, configured to perform, after the receiving module 703 receives the paging message carrying the key update indication information, at least one of the following operations: resetting the MAC layer; reconstructing an RLC layer; updating the key; setting a COUNT value used by the PDCP layer to 1; configuring a PDCP layer and an RLC layer according to a configuration mode stored in a preset state; applying default configuration parameters at the MAC layer and PHY; and after the above operation is performed, maintaining the state in a preset state;

or, after the receiving module 703 receives the RRC connection reconfiguration message carrying the key update indication information, perform at least one of the following operations: resetting the MAC layer; an RLC layer is reestablished; updating the key; setting a COUNT value used by the PDCP layer to 1; configuring a PDCP layer and an RLC layer according to a configuration mode stored in a preset state; applying default configuration parameters at the MAC layer and PHY; and after the operation is executed, sending an RRC connection reconfiguration completion message to the base station by adopting an unauthorized transmission mode, and keeping the RRC connection reconfiguration completion message in a preset state.

In some implementations, the apparatus for data transmission provided in this embodiment may further include: the transmitting module 705 is configured to transmit the sending data processed by the first processing module 701 in an unauthorized transmission manner.

In addition, for the related description of the data transmission apparatus provided in this embodiment, reference may be made to the method embodiment on the UE side, and therefore, the description thereof is not repeated herein.

In addition, an embodiment of the present invention further provides a data transmission apparatus, as shown in fig. 8 or fig. 9, which is applied to a base station, and includes:

a first indication module 801, configured to indicate a configuration mode of a preset state to the UE, so that the UE processes transmission data in the preset state in the configuration mode;

a second indicating module 802, configured to indicate the UE to enter a preset state.

In some implementations, as shown in fig. 8, the apparatus for data transmission provided in this embodiment may further include:

a first transmission module 803, configured to send, through system information broadcast or RRC signaling, a COUNT value triggering UE to apply for key update, so that when the COUNT value used by the PDCP layer of any DRB or SRB reaches the COUNT value triggering UE to apply for key update, the UE in a preset state initiates a key update process.

a request receiving module 804, configured to receive a key update request sent by a UE;

a determining module 805, configured to determine, after the request receiving module 804 receives the key update request sent by the UE, whether a COUNT value used by a PDCP layer of any DRB or SRB of the UE reaches a COUNT value that triggers the UE to apply for key update;

a second transmission module 806, configured to send a reply response message to the UE when the result of the determining module 805 is yes, where the reply response message carries the key update indication information.

In some implementations, as shown in fig. 9, the apparatus for data transmission provided in this embodiment may further include:

a monitoring module 807 for monitoring a COUNT value used by a PDCP layer of any DRB or SRB of the UE;

a notifying module 808, configured to notify the UE of updating the key through a paging message when the monitoring module 807 monitors that the COUNT value used by any DRB of the UE or the PDCP layer of the SRB in the preset state reaches the COUNT value that triggers the UE to apply for key updating, where the paging message carries key updating indication information; or notifying the UE to update the key through an RRC connection reconfiguration message, wherein the RRC connection reconfiguration message carries key update indication information.

In addition, for the related description of the data transmission apparatus provided in this embodiment, reference may be made to the method embodiment on the base station side, and therefore, the description thereof is not repeated herein.

In addition, an embodiment of the present invention further provides an apparatus for data transmission, which includes a processor and a memory storing processor-executable instructions, where the instructions, when executed by the processor, perform the following operations:

when the UE is in a preset state, processing the sending data by adopting a preset state configuration mode; the preset state refers to a state that an interface between the UE and the base station is disconnected and the interface between the base station and the core network is kept connected.

When the UE is in the preset state, the sending data is processed in a preset configuration mode, which may include at least one of the following:

when the UE is in a preset state, processing the sending data on the user plane according to the stored configuration mode of the radio bearer in the connection state;

when the UE is in a preset state, processing and sending data on a user plane according to a preset radio bearer configuration mode;

and when the UE is in a preset state, processing and sending data in a user plane according to the configuration mode of the radio bearer of the target base station.

Wherein the instructions, when executed by the processor, are further operable to:

and when the UE is in a preset state and the COUNT value used by the PDCP layer of any DRB or SRB reaches the COUNT value triggering the UE to apply for updating the key, initiating a key updating process.

and indicating a configuration mode of a preset state to the UE so that the UE processes and transmits data in the preset state by adopting the configuration mode, wherein the preset state refers to a state that an interface between the UE and the base station is disconnected and the interface between the base station and the core network is kept connected.

monitoring a COUNT value used by a PDCP layer of any DRB or SRB of the UE;

when the fact that the COUNT value used by any DRB or PDCP layer of the SRB of the UE in the preset state reaches the COUNT value triggering the UE to apply for updating the key is monitored, the UE is informed of updating the key through a paging message, wherein the paging message carries key updating indication information; or notifying the UE to update the key through an RRC connection reconfiguration message, wherein the RRC connection reconfiguration message carries key update indication information.

In addition, an embodiment of the present invention further provides a data transmission system, which may include: a UE and a base station; the UE may refer to the description of the embodiment shown in fig. 7, and the base station may refer to the description of the embodiment shown in fig. 8 or fig. 9, which is not repeated herein.

It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by a program instructing associated hardware (e.g., a processor) to perform the steps, and the program may be stored in a computer readable storage medium, such as a read only memory, a magnetic or optical disk, and the like. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, the modules/units in the above embodiments may be implemented in hardware, for example, by an integrated circuit, or may be implemented in software, for example, by a processor executing programs/instructions stored in a memory to implement the corresponding functions. The present application is not limited to any specific form of hardware or software combination.

The foregoing shows and describes the general principles and features of the present application, together with the advantages thereof. The present application is not limited to the above-described embodiments, which are described in the specification and drawings only to illustrate the principles of the application, but also to provide various changes and modifications within the spirit and scope of the application, which are within the scope of the claimed application.

Claims

1. A method of data transmission, comprising:

the method comprises the steps that User Equipment (UE) processes sending data in a preset state in a preset configuration mode;

the preset state refers to a state that an interface between the UE and the base station is disconnected and the interface between the base station and the core network is kept connected;

after the sending data is processed in the preset configuration mode, the method further includes: and the UE transmits the sending data by adopting an unauthorized transmission mode.

2. The method of claim 1, wherein the UE processes the transmission data in a preset configuration mode in a preset state, and the method includes:

and the UE processes the sending data on the user plane according to the stored configuration mode of the radio bearer in the connection state in a preset state.

3. The method of claim 2, wherein the UE, in a preset state, processes the transmission data in a user plane according to a stored configuration manner of the radio bearer in the connected state, and includes:

the UE performs at least one of the following operations on the radio bearer supporting the transmission:

resetting a Media Access Control (MAC) layer; keeping the state of a PDCP layer; maintaining Radio Link Control (RLC) layer state; suspending the radio bearer; default configuration parameters are applied at the MAC layer and the physical layer PHY.

4. The method of claim 3, wherein maintaining the PDCP layer state comprises: keeping PDCP sequence number SN, COUNT value, next hop link COUNT NCC, robust header compression ROHC state and PDCP configuration information; the maintaining of the RLC layer state includes: RLC SN, RLC mode, and RLC configuration information are maintained.

5. The method of claim 1, wherein the UE processes the transmission data in a preset configuration mode in a preset state, and the method includes:

and the UE processes the sending data according to a preset radio bearer configuration mode on a user plane in a preset state.

6. The method according to claim 5, wherein the UE processes the transmission data in a user plane according to a predetermined radio bearer configuration mode in a preset state, including:

resetting a Media Access Control (MAC) layer; reestablishing a Radio Link Control (RLC) layer; rebuilding a packet data convergence protocol PDCP layer; suspending the radio bearer; updating the key; applying configuration parameters of an unacknowledged UM mode at the PDCP layer; applying configuration parameters of UM mode in RLC layer; default configuration parameters are applied at the MAC layer and the physical layer PHY.

7. The method of claim 1, wherein the UE processes the transmission data in a preset configuration mode in a preset state, and the method includes:

the UE processes the sending data on the user plane according to the configuration mode of the wireless bearer of the target base station in a preset state; and the target base station is a base station reselected by the UE cell.

8. The method of claim 7, wherein the UE processes the transmission data in a user plane according to a configuration mode of a radio bearer of a target base station in a preset state, and the method comprises:

resetting a Media Access Control (MAC) layer; reestablishing a Radio Link Control (RLC) layer; rebuilding a packet data convergence protocol PDCP layer; suspending the radio bearer; updating the key; applying configuration parameters of a target base station at a PDCP layer; applying configuration parameters of a target base station on an RLC layer; default configuration parameters are applied at the MAC layer and the physical layer PHY.

9. The method according to any of claims 2 to 8, wherein the radio bearer comprises at least one of: data radio bearer DRB, signaling radio bearer SRB.

10. The method of claim 1, further comprising: and when the UE is in the preset state and the COUNT value used by the packet data convergence protocol PDCP layer of any data radio bearer DRB or signaling radio bearer SRB reaches the COUNT value triggering the UE to apply for the key update, the UE initiates a key update process.

11. The method of claim 10, wherein the COUNT value triggering the UE to apply for the key update is preset, or is broadcasted by the base station through system information, or is configured by the base station through radio resource control RRC signaling.

12. The method of claim 10, wherein the UE initiates a key update procedure comprising: and the UE sends a Radio Resource Control (RRC) signaling, and the RRC signaling carries a key updating request.

13. The method of claim 12, wherein the RRC signaling comprises one of: an RRC connection reestablishment request message rrcconnectionreseparatrequest, an RRC connection resume request message rrcconnectionresumerrequest, a new self-defined message.

14. The method of claim 1, further comprising:

UE receives a paging message carrying key updating indication information;

resetting a Media Access Control (MAC) layer; reestablishing a Radio Link Control (RLC) layer; updating the key; setting a COUNT value used by a packet data convergence protocol PDCP layer to 1; configuring a PDCP layer and an RLC layer according to a configuration mode stored in a preset state; applying default configuration parameters at the MAC layer and the physical layer PHY;

after performing the above operations, the UE remains in a preset state.

15. The method of claim 1, further comprising:

the UE receives a Radio Resource Control (RRC) connection reconfiguration message carrying key updating indication information;

16. The method of claim 1, further comprising:

after receiving the RRC connection reconfiguration message, the UE executes at least one of the following operations:

resetting a Media Access Control (MAC) layer; reestablishing a Radio Link Control (RLC) layer; rebuilding a packet data convergence protocol PDCP layer; updating the configuration mode of the preset state according to the configuration information carried in the RRC connection reconfiguration message;

17. A method of data transmission, comprising:

the method comprises the steps that a base station indicates a configuration mode of a preset state to User Equipment (UE) so that the UE processes sending data in the preset state by adopting the configuration mode and sends the sending data by adopting an unauthorized transmission mode, wherein the preset state refers to a state that an interface between the UE and the base station is disconnected and the interface between the base station and a core network is kept connected.

18. The method of claim 17, further comprising: and the base station indicates the UE to enter a preset state.

19. The method of claim 17, further comprising:

the base station sends a COUNT value triggering UE to apply for key updating through system information broadcasting or Radio Resource Control (RRC) signaling, so that the UE in a preset state initiates a key updating process when the COUNT value used by a Packet Data Convergence Protocol (PDCP) layer of any Data Radio Bearer (DRB) or Signaling Radio Bearer (SRB) reaches the COUNT value triggering UE to apply for key updating.

20. The method of claim 19, further comprising: after receiving the key update request sent by the UE, the base station determines whether a COUNT value used by a PDCP layer of any DRB or SRB of the UE reaches the COUNT value that triggers the UE to apply for key update, and if so, sends a reply response message to the UE, where the reply response message carries key update indication information.

21. The method of claim 17, further comprising:

the base station monitors a COUNT value used by any Data Radio Bearer (DRB) of the UE or a Packet Data Convergence Protocol (PDCP) layer of a Signaling Radio Bearer (SRB);

when monitoring that a COUNT value used by a PDCP layer of any DRB or SRB of the UE in a preset state reaches a COUNT value triggering the UE to apply for key updating, the base station informs the UE of updating the key through a paging message, wherein the paging message carries key updating indication information; or the base station informs the UE of updating the key through a Radio Resource Control (RRC) connection reconfiguration message, wherein the RRC connection reconfiguration message carries key updating indication information.

22. An apparatus for data transmission, applied to a User Equipment (UE), comprising:

the first processing module is used for processing the sending data by adopting a preset configuration mode when the UE is in a preset state; the preset state refers to a state that an interface between the UE and the base station is disconnected and the interface between the base station and the core network is kept connected;

the device further comprises: and the transmitting module is used for transmitting the sending data in an unauthorized transmission mode.

23. The apparatus of claim 22, wherein the first processing module is configured to process the sending data in a preset configuration manner by at least one of:

24. The apparatus of claim 22, further comprising:

and the second processing module is used for initiating the key updating process when the UE is in the preset state and the COUNT value used by the packet data convergence protocol PDCP layer of any data radio bearer DRB or signaling radio bearer SRB reaches the COUNT value triggering the UE to apply for the key updating.

25. The apparatus of claim 22, further comprising:

a receiving module, configured to receive a paging message carrying key update indication information, or receive a radio resource control RRC connection reconfiguration message carrying key update indication information;

a third processing module, configured to, after the receiving module receives the paging message, perform at least one of the following operations: resetting a Media Access Control (MAC) layer; reestablishing a Radio Link Control (RLC) layer; updating the key; setting a COUNT value used by a packet data convergence protocol PDCP layer to 1; configuring a PDCP layer and an RLC layer according to a configuration mode stored in a preset state; applying default configuration parameters at the MAC layer and the physical layer PHY; and after the above operation is performed, maintaining the state in a preset state;

26. An apparatus for data transmission, applied to a base station, comprising:

the first indication module is configured to indicate a configuration mode of a preset state to User Equipment (UE) so that the UE processes transmission data in the preset state by using the configuration mode and transmits the transmission data by using an unauthorized transmission mode, where the preset state refers to a state where an interface between the UE and a base station is disconnected and an interface between the base station and a core network is kept connected.

27. The apparatus of claim 26, further comprising: and the second indicating module is used for indicating the UE to enter a preset state.

28. The apparatus of claim 26, further comprising: a first transmission module, configured to send a COUNT value triggering UE to apply for key update through system information broadcast or radio resource control RRC signaling, so that the UE in a preset state initiates a key update process when the COUNT value used by any data radio bearer DRB or packet data convergence protocol PDCP layer of a signaling radio bearer SRB reaches the COUNT value triggering UE to apply for key update.

29. The apparatus of claim 28, further comprising:

30. The apparatus of claim 26, further comprising:

a monitoring module, configured to monitor a COUNT value used by a packet data convergence protocol PDCP layer of any data radio bearer DRB or signaling radio bearer SRB of the UE;

a notification module, configured to notify, when the monitoring module monitors that a COUNT value used by any DRB or PDCP layer of an SRB of the UE in a preset state reaches a COUNT value that triggers the UE to apply for key update, the UE of a key update through a paging message, where the paging message carries key update indication information; or notifying the UE to update the key through a Radio Resource Control (RRC) connection reconfiguration message, wherein the RRC connection reconfiguration message carries key update indication information.

31. A system for data transmission, comprising: user Equipment (UE) and a base station;

the base station is used for indicating a preset configuration mode to the UE; the UE is used for processing the sending data in a preset state by adopting the configuration mode; the preset state refers to a state that an interface between the UE and the base station is disconnected and the interface between the base station and the core network is kept connected; the UE is used for transmitting the sending data by adopting an unauthorized transmission mode.