CN107645779B

CN107645779B - data sending and transmitting method and device

Info

Publication number: CN107645779B
Application number: CN201610589351.XA
Authority: CN
Inventors: 刘佳敏; 谌丽
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2016-07-22
Filing date: 2016-07-22
Publication date: 2019-12-13
Anticipated expiration: 2036-07-22
Also published as: WO2018014741A1; CN107645779A

Abstract

the invention discloses a data sending and transmitting method and a device, comprising the following steps: and when sending the uplink data, sending the data to the current service base station through a radio bearer in an inactive state. Receiving data sent by inactive UE through a radio bearer on a base station, wherein the base station is a currently serving base station of the UE; the data is sent to the core network node. And when sending the downlink data, sending the data to a currently serving base station of the UE on the anchor base station. And sending the data to the UE in the inactive state through a radio bearer on a serving base station. And the UE in the inactive state receives data sent by the current serving base station through a radio bearer. By adopting the scheme, the complexity of the signaling process in the scene of sparse data transmission can be reduced, and the resource utilization rate of operators is improved. Besides, the complexity of the signaling process is reduced, and data transmission can be carried out faster because the data is sent without carrying out state transition in the signaling process and then sending.

Description

data sending and transmitting method and device

Technical Field

the present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for transmitting and transmitting data.

background

the following introduces UE (User Equipment) status and behavior based on LTE (Long Term Evolution) system.

1) the RRC (Radio Resource Control) state in the LTE system is defined as follows:

Actions that can be performed in RRC _ IDLE (RRC IDLE state):

-PLMN (Public Land Mobile Network) selection;

NAS (Non Access Stratum ) configures DRX (Discontinuous Reception);

-system information broadcast;

-paging;

Mobility in Cell reselection mode;

-the UE is assigned an identity unique within a certain tracking area;

-eNB (evolved base station) does not save UE context (UE context information);

-transmit-receive (D2D (Device-to-Device) communication procedures) where sidelink (direct link) communication is possible;

Notification and listening of sildelink discovery (D2D discovery procedure).

RRC _ CONNECTED (RRC connection):

-the UE has a connection of E-UTRAN-RRC (E-UTRAN: Evolution-Universal Radio Access Network, evolved Global Terrestrial Radio Access Network);

-context information of the UE on the E-UTRAN side;

-the E-UTRAN knows the Cell to which the UE belongs and allocates an intra-Cell UE identity C-RNTI (Cell-Radio Network Temporary identity);

The Network and the UE can send and receive data by using the C-RNTI;

-Network controlled mobility;

-neighbor cell measurements;

-enabling transmission and reception of sidelink communications (D2D communications);

-notification and listening of sildelink discovery (D2D discovery);

PDCP/RLC/MAC (PDCP: Packet Data Convergence Protocol, RLC: Radio Link Control, MAC: Media Access Control) layer:

-transceiving data between the UE and the network;

-the UE listening to a control signalling channel on the shared data channel to see if there is a transmission on the shared data channel allocated to the UE.

-the UE reporting channel quality information and feedback information to the eNB;

The DRX cycle is controlled by the eNB, configured according to the UE power saving and activity level of resource utilization.

The currently supported state transition procedure is:

from IDLE to CONNECTED state, the terminal needs to perform an access or reestablishment procedure. From the CONNECTED state, the IDLE state may be entered by a release procedure.

in the existing terminal state, except that the RRC connection state is allocated with a terminal air interface transmission unique identifier C-RNTI and a corresponding DRB (Data Radio Bearer) is established, Data transmission and reception can be directly performed, when uplink Data needs to be transmitted in other states, the terminal first initiates connection establishment, enters the RRC connection state, establishes RRC connection, establishes the DRB, and can perform subsequent Data transmission.

in the existing terminal state, except that the RRC connection state is allocated with the terminal air interface transmission unique identifier C-RNTI, data can be directly received and transmitted, when data needs to be transmitted in other states, the terminal enters the RRC connection state first, establishes RRC connection, and acquires the terminal air interface transmission unique identifier for data transmission, such as the C-RNTI, so as to perform subsequent data transmission.

In other words, the prior art is also deficient in that: data transmission can be performed only after the RRC connection is established after the RRC connection state is entered.

disclosure of Invention

The invention provides a data sending and transmitting method and device, which are used for solving the problem that UE (user equipment) in an inactive state cannot send and transmit data.

the embodiment of the invention provides a data sending method, which comprises the following steps:

determining data which needs to be sent to a currently serving base station by the inactive UE;

and sending the data to the current service base station through a radio bearer in an inactive state.

Preferably, the radio bearer is a data radio bearer established according to a preset configuration;

or, the radio bearer is a data radio bearer determined by determining a service to which data to be sent to a currently serving base station belongs according to a mapping relationship between the service and a data radio bearer reserved by the UE.

Or, the radio bearer is a signaling radio bearer established according to a preset configuration;

alternatively, the radio bearer is a signaling radio bearer reserved by the UE.

preferably, the preset configuration is configured by a network-side dedicated signaling, or is configured in advance on the UE, and when the data radio bearer or the signaling radio bearer is established according to the preset configuration, the configuration for establishing the data radio bearer or the signaling radio bearer is selected according to the type and/or the service type of the UE;

or, the preset configuration is determined according to the notification of the current serving base station, or a data radio bearer or a signaling radio bearer determined according to subscription information of the UE.

preferably, when the data is transmitted to the currently serving base station using the data radio bearer, the method further comprises:

the base station UE is notified of the inactive ID.

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

Receiving data sent by inactive UE through a radio bearer on a base station, wherein the base station is a currently serving base station of the UE;

the data is sent to the core network node.

preferably, the radio bearer is a data radio bearer established according to a preset configuration, the anchor base station of the UE acquires data radio bearer related information of the UE, processes the data according to the related information, and sends the processed data to the core network node;

or, the radio bearer is a data radio bearer established according to a preset configuration, and after the data is handed over to the anchor base station of the UE for processing, the anchor base station of the UE sends the processed data to the core network node;

or, the radio bearer is a data radio bearer reserved by an anchor base station of the UE, and the base station processes the data according to the configuration of the data radio bearer and then sends the processed data to the core network node;

or, the radio bearer is a signaling radio bearer established by the base station according to a preset configuration, acquires signaling radio bearer related information of the UE from an anchor base station of the UE, processes the data according to the related information, and sends the processed data to a core network node;

or, the radio bearer is a signaling radio bearer established by the base station according to a preset configuration, and the anchor base station of the UE sends the processed data to the core network node after handing the data to the anchor base station of the UE;

or, the radio bearer is a signaling radio bearer reserved by the anchor base station of the UE, acquires signaling radio bearer related information of the UE from the anchor base station of the UE, processes the data according to the related information, and sends the processed data to the core network node;

or, the radio bearer is a signaling radio bearer reserved by the anchor base station of the UE, and the anchor base station of the UE sends the processed data to the core network node after handing the data to the anchor base station of the UE.

Preferably, the anchor base station of the UE is determined according to inactive ID notified by the UE.

Preferably, the data radio bearer related information includes one or a combination of the following information:

configuration information of data radio bearer, data radio bearer state information, UE safety related parameter information and core network user plane access information.

Preferably, the signaling radio bearer related information includes one or a combination of the following information:

Configuration information of signaling radio bearer, signaling radio bearer state information, UE safety related parameter information and core network user plane access information.

preferably, further comprising:

when data is transmitted using the reserved radio bearer, previous state variable information that changes due to the data transmission is updated to the anchor base station.

Preferably, further comprising:

when the PDCP layer is processed, the SN and/or Count obtained from the anchor base station are continuously maintained.

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

Determining data needing to be sent to inactive UE on a base station, wherein the base station is a currently serving base station of the UE;

and sending the data to the UE in the inactive state through a radio bearer.

Preferably, the data to be sent to the inactive UE is sent by the core network via the anchor base station of the UE;

or, when the currently serving base station of the UE is the anchor base station of the UE, the data that needs to be sent to the inactive UE is sent by the core network.

Preferably, the radio bearer is a data radio bearer established according to a preset configuration, and further includes:

receiving related information of a data radio bearer established according to preset configuration sent by an anchor point base station of the UE, and sending the data to the UE in an inactive state through the data radio bearer established according to the preset configuration according to the related information, wherein the related information of the data radio bearer established according to the preset configuration comprises one or the combination of the following information:

Preferably, when data is sent through the data radio bearer established according to the preset configuration, the ID of the data radio bearer established this time is different from the ID of the data radio bearer deleted after the last establishment.

Preferably, the radio bearer is a data radio bearer reserved by an anchor base station of the UE, further comprising:

Receiving the relevant information of the reserved data radio bearer sent by the anchor base station of the UE, and sending the data to the UE in an inactive state through the reserved data radio bearer according to the relevant information, wherein the relevant information of the reserved data radio bearer comprises one or a combination of the following information:

preferably, further comprising:

After the data transmission is finished, explicit reset processing is carried out in a layer two signaling mode.

preferably, further comprising:

When UE initiates a corresponding service on a data radio bearer reserved by an anchor point base station of the UE, continuous security layer state variables are adopted, and the state variables of other layers start from initial values each time.

preferably, further comprising:

and informing the anchor base station of the UE of the security layer state variable.

preferably, the radio bearer is a signaling radio bearer established by the base station according to a preset configuration, and the data is sent from the signaling radio bearer to the inactive UE through NAS signaling or RRC signaling according to the signaling radio bearer related information of the UE;

or, the radio bearer is a signaling radio bearer reserved by the anchor base station of the UE, and the data is sent from the signaling radio bearer to the inactive UE through NAS signaling or RRC signaling according to the signaling radio bearer related information of the UE.

Determining data to be sent to inactive UE on a base station, wherein the base station is an anchor base station of the UE;

And sending the data to a current serving base station of the UE.

preferably, the data to be sent to the inactive UE is sent by the core network.

Preferably, further comprising:

Sending related information of the data radio bearer reserved by an anchor base station of the UE to a current serving base station of the UE, wherein the related information of the reserved data radio bearer comprises one or a combination of the following information:

preferably, further comprising:

sending related information of the data radio bearer established according to the preset configuration to a current serving base station of the UE, wherein the related information of the data radio bearer established according to the preset configuration comprises one or the combination of the following information:

determining a radio bearer between the UE in the inactive state and a currently serving base station;

and receiving data sent by the current service base station through a radio bearer in an inactive state.

Preferably, the radio bearer is a data radio bearer established according to a preset configuration, and after processing the data according to the preset configuration of the data radio bearer on the UE, the processed data is sent to a higher layer.

Preferably, when receiving data through the data radio bearer established according to the preset configuration, the ID of the data radio bearer established this time is different from the ID of the data radio bearer deleted after the last establishment.

Preferably, the radio bearer is a data radio bearer reserved at an anchor base station of the UE, and the data is processed on the UE according to configuration of the data radio bearer and then sent to a higher layer.

preferably, further comprising:

Preferably, further comprising:

when a corresponding service is initiated on a data radio bearer reserved by an anchor point base station of the UE, continuous security layer state variables are adopted, and the state variables of other layers start from initial values each time.

preferably, the radio bearer is a signaling radio bearer established by the base station according to a preset configuration, and receives data sent by the base station from the signaling radio bearer to the inactive UE through NAS signaling or RRC signaling according to the signaling radio bearer related information of the UE;

Or, the radio bearer is a signaling radio bearer reserved by the anchor base station of the UE, and receives data sent by the base station from the signaling radio bearer to the UE in the inactive state through NAS signaling or RRC signaling according to the signaling radio bearer related information of the UE.

an embodiment of the present invention provides a data transmission apparatus, including:

an uplink determining module, configured to determine data that the inactive UE needs to send to a currently serving base station;

and the uplink sending module is used for sending the data to the currently serving base station through a wireless bearer in an inactive state.

Alternatively, the radio bearer is a signaling radio bearer reserved by the UE.

preferably, the uplink data sending module is further configured to notify the inactive ID of the base station UE when sending the data to the currently serving base station using the data radio bearer.

an embodiment of the present invention provides a data receiving apparatus, including:

an uplink data receiving module, configured to receive data sent by an inactive UE through a radio bearer on a base station, where the base station is a currently serving base station of the UE;

And the uplink data sending module is used for sending the data to the core network node.

Preferably, the uplink data sending module is further configured to update, when data is transmitted using the reserved radio bearer, previous state variable information that changes due to data transmission to the anchor base station.

preferably, the uplink data sending module is further configured to continuously maintain the SN and/or Count obtained from the anchor base station when the PDCP layer performs processing.

a downlink data determining module, configured to determine, on a base station, data that needs to be sent to an inactive UE, where the base station is a currently serving base station of the UE;

And the downlink data sending module is used for sending the data to the UE in the inactive state through a wireless bearer.

Preferably, the downlink data sending module is further configured to, when sending data through the data radio bearer established according to the preset configuration, determine that the ID of the data radio bearer established this time is different from the ID of the data radio bearer deleted after the last establishment.

preferably, the downlink data sending module is further configured to perform explicit reset processing in a layer two signaling manner after data transmission is finished.

Preferably, the downlink data sending module is further configured to adopt continuous security layer state variables when the UE initiates a corresponding service on a data radio bearer reserved by an anchor base station of the UE, where the state variables of other layers start from initial values each time.

Preferably, the downlink data sending module is further configured to notify the anchor base station of the UE of the security layer state variable.

A downlink determining module, configured to determine, on a base station, data that needs to be sent to an inactive UE, where the base station is an anchor base station of the UE;

And a downlink sending module, configured to send the data to a currently serving base station of the UE.

preferably, the data to be sent to the inactive UE is sent by the core network.

Preferably, the downlink sending module is further configured to send information about a data radio bearer reserved by an anchor base station of the UE to a currently serving base station of the UE, where the information about the reserved data radio bearer includes one or a combination of the following information:

preferably, the downlink sending module is further configured to send information related to the data radio bearer established according to the preset configuration to a currently serving base station of the UE, where the information related to the data radio bearer established according to the preset configuration includes one or a combination of the following information:

a downlink bearer determining module, configured to determine a radio bearer between an inactive UE and a currently serving base station;

and the downlink receiving module is used for receiving data sent by the currently serving base station through the wireless bearer in an inactive state.

Preferably, the downlink receiving module is further configured to, when the radio bearer is a data radio bearer established according to a preset configuration, process the data on the UE according to the preset configuration of the data radio bearer, and then send the processed data to a higher layer.

preferably, the downlink receiving module is further configured to, when receiving data through a data radio bearer established according to a preset configuration, determine that an ID of the data radio bearer established this time is different from an ID of the data radio bearer deleted after the last establishment.

preferably, the downlink receiving module is further configured to, when the radio bearer is a data radio bearer reserved by an anchor base station of the UE, process the data on the UE according to configuration of the data radio bearer, and send the processed data to a higher layer.

preferably, the downlink receiving module is further configured to perform explicit reset processing in a layer two signaling manner after data transmission is finished.

Preferably, the downlink receiving module is further configured to adopt continuous security layer state variables when initiating a corresponding service on a data radio bearer reserved by an anchor base station of the UE, where the state variables of other layers start from initial values each time.

preferably, the downlink receiving module is further configured to receive, when the radio bearer is a signaling radio bearer established by the base station according to a preset configuration, data sent by the base station from the signaling radio bearer to the UE in an inactive state through NAS signaling or RRC signaling according to the signaling radio bearer related information of the UE; or, when the radio bearer is a signaling radio bearer reserved by the anchor base station of the UE, receiving data sent by the base station from the signaling radio bearer to the UE in an inactive state through NAS signaling or RRC signaling according to the signaling radio bearer related information of the UE.

The invention has the following beneficial effects:

in the technical scheme provided by the embodiment of the invention, when sending the uplink data, determining the data which needs to be sent to the currently serving base station by the inactive UE; and sending the data to the current service base station through a radio bearer in an inactive state. Receiving data sent by inactive UE through a radio bearer on a base station, wherein the base station is a currently serving base station of the UE; the data is sent to the core network node.

When sending downlink data, determining data needing to be sent to inactive UE on a base station, wherein the base station is an anchor base station of the UE; and sending the data to a current serving base station of the UE. Determining data needing to be sent to inactive UE on a base station, wherein the base station is a currently serving base station of the UE; and sending the data to the UE in the inactive state through a radio bearer. Determining a radio bearer between the UE in the inactive state and a currently serving base station; and receiving data sent by the current service base station through a radio bearer in an inactive state.

The technical scheme for the UE to send and transmit data in the inactive state is provided through the scheme.

it is easy to see that, after the scheme is adopted, the complexity of the signaling process in a scene of sparse data transmission can be particularly reduced, and the resource utilization rate of an operator is improved. Besides, the complexity of the signaling process is reduced, and the data is transmitted without the need of performing state transition in the signaling process and then transmitting the data, so that the data transmission can be performed faster, the quality of service transmission can be guaranteed, and the electric quantity of the UE can be saved.

Drawings

the accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of a network deployment structure according to an embodiment of the present invention;

FIG. 2 is a diagram of a second network deployment architecture in an embodiment of the present invention;

fig. 3 is a schematic diagram of an implementation flow of an uplink data transmission method on a UE side in an embodiment of the present invention;

Fig. 4 is a schematic diagram of an implementation flow of an uplink data transmission method at a base station side in an embodiment of the present invention;

fig. 5 is a schematic diagram of an implementation flow of a downlink data transmission method at an anchor base station side in an embodiment of the present invention;

fig. 6 is a schematic flow chart illustrating an implementation of a downlink data transmission method at a current serving base station side in an embodiment of the present invention;

fig. 7 is a schematic diagram of an implementation flow of a downlink data receiving method on a UE side in an embodiment of the present invention;

Fig. 8 is a schematic structural diagram of a data transmission apparatus on the UE side according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a data receiving apparatus on the base station side according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a data transmission apparatus on the current serving base station side according to an embodiment of the present invention;

Fig. 11 is a schematic structural diagram of a data transmission apparatus on the anchor base station side in the embodiment of the present invention;

Fig. 12 is a schematic structural diagram of a data receiving apparatus on the UE side according to an embodiment of the present invention;

Fig. 13 is a schematic structural diagram of an uplink UE in the embodiment of the present invention;

Fig. 14 is a schematic structural diagram of a base station in uplink according to an embodiment of the present invention;

fig. 15 is a schematic structural diagram of a current serving base station in downlink in the embodiment of the present invention;

fig. 16 is a schematic structural diagram of an anchor base station in downlink in the embodiment of the present invention;

fig. 17 is a schematic structural diagram of a UE in downlink in the embodiment of the present invention.

Detailed Description

The inventor notices in the process of invention that:

the currently supported state transition procedure is:

however, there are other special conditions as follows:

Newly introduced terminal state: inactive connected state (inactive state) in which the following behavior is allowed:

-the core network sees the UE in a connected state;

Mobility is UE-performed, within a network-side pre-configured RAN tracking area, by cell reselection, instead of a handover procedure;

the terminal is assigned a unique user identity within a RAN tracking area pre-configured on the network side.

In the Inactive state, the network side allocates an effective RAN identifier in a certain area for the terminal, and the identifier is used for identifying the terminal in the Inactive state, and can be used for the network side to search for the terminal or to use the identifier as an identity to identify and enter a connection state when the terminal actively initiates uplink access. May be referred to as inactive UE ID or resume UE ID. The identifier is different from a globally unique IMSI (International Mobile Subscriber Identity) or a connected terminal identifier C-RNTI, the length of the identifier is between the International Mobile Subscriber Identity (International Mobile Subscriber Identity) and the International Mobile Subscriber Identity (International Mobile Subscriber Identity) (for example, the length of an inactive UE ID is 40 bits, and the length of the C-RNTI is 16 bits), the identifier is only valid in a certain area including a plurality of cells or a plurality of enbs, and if the area is exceeded, the terminal needs to update the inactive UE ID.

In the existing terminal state, except that the RRC connection state allocates the terminal air interface transmission unique identifier C-RNTI and establishes the corresponding DRB to directly perform data transceiving, when uplink data needs to be transmitted in other states, the terminal initiates connection establishment first, enters the RRC connection state, establishes the RRC connection, establishes the DRB, and then can perform subsequent data transmission.

However, with the development of wireless communication systems, terminal types and service types are diversified, and the requirements of saving power, saving network resources, and satisfying various service types coexist. For example, in order to ensure power saving and fast data transmission of the terminal at the same time, an inactive state of the terminal is introduced, and in this state, the terminal maintains core network connection, but does not perform conventional operations (such as handover, uplink timing update, radio link monitoring, and the like) in an air interface connection state, and does not allocate a terminal identifier (such as C-RNTI) directly used for air interface transmission, so that the processes of entering the RRC connection state first, establishing RRC connection, acquiring the identifier, and performing subsequent data transmission cannot directly perform air interface scheduling transmission.

It can be seen that the above-mentioned procedures of entering the RRC connection state, establishing the RRC connection, obtaining the identifier, and performing subsequent data transmission are not favorable for fast transmission when data arrives, and if only a small burst data packet needs to be sent, such as a typical MTC (Machine Type Communication) service, the terminal enters the connection state and needs to enter an idle or inactive state in order to save power after sending a small data packet, and this state transition will cause signaling overhead, and if the number of terminals is large (such as an MTC, active MTC scenario), this signaling overhead is almost unacceptable.

based on this, the embodiment of the invention will solve how to perform fast data transmission in the inactive state. The following describes embodiments of the present invention with reference to the drawings.

In the description process, the UE and the implementation of the currently serving base station side of the UE and the anchor base station side of the UE will be described separately, and then an example of the implementation of the cooperation of the UE and the anchor base station will be given to better understand the implementation of the scheme provided in the embodiment of the present invention. Such an explanation does not mean that the three must be implemented in cooperation or individually, and actually, when the UE is implemented separately from the currently serving base station side of the UE and the anchor base station side of the UE, it solves the problems of the UE side, the currently serving base station side of the UE, and the anchor base station side of the UE, respectively, and when the three are used in combination, a better technical effect is obtained.

In the embodiment of the invention, for UE in an inactive state, when the UE has uplink and downlink data to be sent, the UE and the current service base station adopt recovery or configuration of a specific radio bearer to transmit the data, and the current service base station needs to perform information interaction with an anchor base station storing UE context so as to be convenient for acquiring and updating UE information.

Wherein the specific radio bearer may include: a data radio bearer and a signaling radio bearer, wherein the data radio bearer will be described by taking DRB as an example in the specific embodiment, and the signaling radio bearer will be described by taking SRB1 and SRB2 as examples, that is, the following bearers:

1. Default DRB;

2. UE transmits an original DRB corresponding to the service;

3. SRB2 (SRB: Signal Radio Bear, Signaling Radio bearer) for NAS signaling or a default SRBj;

4. SRB1 or default SRBi for RRC signaling;

Where the i, j subscripts are used only to identify the different SRBs 1 and SRBs 2, SRBj is still a radio bearer in SRB2, and SRBi is still a radio bearer in SRB 1.

in the implementation, there are two kinds of radio bearers, one is newly established, and for convenience, when it is called as default radio bearer, it means radio bearer established according to preset configuration; the other is a radio bearer that may have been previously reserved between the base station and the UE, i.e., the UE is reserved.

In the description process, uplink data transmission from the UE to the core network and downlink data transmission from the core network to the UE will be described separately, and specific implementation will be described with examples, and meanwhile, when the description is performed with examples, the description will be performed according to default classification of DRBs, reserved DRBs, SRBs 2, and SRBs 1, which are established according to preset configuration.

First, a structure of an implementation environment RAN (Radio Access Network) side of the technical solution provided in the embodiment of the present invention is briefly described below. Two possible network deployment architectures for future mobile communications will be described.

fig. 1 is a schematic diagram of a network deployment structure, as shown, the architecture in the diagram is: base station + terminal, is a typical LTE architecture. The eNB is provided with a plurality of cells (cells), the terminal UE and the cells perform air interface data transceiving under a connection state, and the connection state UE is allocated with a unique UE identifier C-RNTI in the cells.

Fig. 2 is a schematic diagram of a network deployment structure, as shown in the figure, the architecture in the diagram is: the network side nodes are divided into CUs (Central Unit) and DUs (Distributed Unit), and the user side nodes are terminals.

Fig. 2 is a structure that may be adopted in future mobile communication 5G, where a network side node includes a central unit and a distributed unit, where one central unit controls multiple distributed units deployed in a certain area, and these distributed units perform air interface Transmission with a terminal specifically through a Transmission Reception Point (TRP). One or more transmission points can serve the terminal at the same time to transmit data, and no matter which mode is adopted, data scheduling and transmission are carried out by a terminal air interface unique identifier distributed to the terminal by a network side, wherein the identifier can be C-RNTI or TRP-RNTI.

The technical solution provided in the embodiments of the present invention is applicable to at least the two RAN architectures. In the following, a unified description is given, in which a terminal unique identifier used for terminal connection state transmission is referred to as a terminal air interface transmission unique identifier, and specifically, the identifier is a C-RNTI in the conventional LTE. The terminal in the Inactive state uniquely identifies the Inactive UE ID in the area. And the network side wireless signaling and data transceiving nodes are all referred to as base stations regardless of being enbs in the first deployment structure or CUs/DUs (specifically, TRPs) in the second deployment structure. The technical scheme provided in the embodiment of the invention is as follows:

Uplink and downlink data transmission

fig. 3 is a schematic flowchart of an implementation flow of an uplink data transmission method on a UE side, as shown in the figure, the implementation flow may include:

step 301, determining data that the inactive UE needs to send to the currently serving base station;

step 302, sending the data to the currently serving base station through a radio bearer in an inactive state.

in the implementation, the DRB is established according to the preset configuration;

Or, the radio bearer is a DRB determined by determining a service to which data to be transmitted to the currently serving base station belongs according to a mapping relationship between the service and the DRB reserved by the UE.

Or, the radio bearer is SRB2 established according to a preset configuration;

alternatively, the radio bearer is the UE-reserved SRB 2;

or, the radio bearer is SRB1 established according to a preset configuration;

alternatively, the radio bearer is the UE-reserved SRB 1.

In specific implementation, the preset configuration is configured by network side dedicated signaling or is configured on the UE in advance, and when the DRB or SRB2 or SRB1 is established according to the preset configuration, the configuration of the DRB or SRB2 or SRB1 is selected and established according to the type and/or service category of the UE;

Or, the preset configuration is determined according to the notification of the current serving base station, or the DRB or SRB2 or SRB1 determined according to the subscription information of the UE.

Fig. 4 is a schematic flow chart of an implementation process of an uplink data transmission method at a base station side, as shown in the figure, the implementation process may include:

step 401, receiving data sent by inactive UE through radio bearer on a base station, where the base station is a currently serving base station of the UE;

Step 402, the data is sent to the core network node.

correspondingly, in various corresponding radio bearer implementations on the base station, the radio bearer is a DRB established according to a preset configuration, and the base station processes the data according to the preset configuration of the DRB and then sends the processed data to the core network node;

or, the radio bearer is a DRB established according to a preset configuration, acquires DRB related information of the UE from an anchor base station of the UE, processes the data according to the related information, and sends the processed data to a core network node;

or, the radio bearer is a DRB established according to a preset configuration, and after handing the data over to the anchor base station of the UE for processing, the anchor base station of the UE sends the processed data to the core network node;

Or, the radio bearer is a DRB reserved by the anchor base station of the UE when the base station is the anchor base station of the UE, and the base station processes the data according to the configuration of the DRB and then sends the processed data to the core network node;

or, the radio bearer is SRB2 established by the base station according to a preset configuration, acquires SRB2 related information of the UE from an anchor base station of the UE, processes the data according to the related information, and sends the processed data to a core network node;

Or, the radio bearer is SRB2 established by the base station according to a preset configuration, and the data is processed by the anchor base station of the UE and then sent to the core network node by the anchor base station of the UE;

or, the radio bearer is the SRB2 reserved by the anchor base station of the UE, acquires the SRB2 related information of the UE from the anchor base station of the UE, processes the data according to the related information, and sends the processed data to the core network node;

or, the radio bearer is SRB2 reserved by the anchor base station of the UE, and the anchor base station of the UE sends the processed data to the core network node after handing the data to the anchor base station of the UE;

Or, the radio bearer is SRB1 established by the base station according to a preset configuration, acquires SRB1 related information of the UE from an anchor base station of the UE, processes the data according to the related information, and sends the processed data to a core network node;

Or, the radio bearer is SRB1 established by the base station according to a preset configuration, and the data is processed by the anchor base station of the UE and then sent to the core network node by the anchor base station of the UE;

or, the radio bearer is the SRB1 reserved by the anchor base station of the UE, acquires the SRB1 related information of the UE from the anchor base station of the UE, processes the data according to the related information, and sends the processed data to the core network node;

or, the radio bearer is SRB1 reserved by the anchor base station of the UE, and the anchor base station of the UE sends the processed data to the core network node after handing the data to the anchor base station of the UE.

second, downlink data transmission

fig. 5 is a schematic flow chart of an implementation flow of a downlink data transmission method at an anchor base station side, and as shown in the figure, the implementation flow may include:

step 501, determining data to be sent to inactive UE on a base station, wherein the base station is an anchor base station of the UE;

Step 502, the data is sent to the currently serving base station of the UE.

it should be noted that the flow of fig. 5 illustrates a case where the anchor base station of the UE is not the same base station as the currently serving base station, but the anchor base station of the UE may be the same base station as the currently serving base station.

In the implementation, the data to be transmitted to the inactive UE is transmitted by the core network.

in an implementation, the method further comprises the following steps:

In an implementation, the method further comprises the following steps:

Fig. 6 is a schematic flow chart of an implementation of a downlink data transmission method at a current serving base station side, as shown in the figure, the implementation may include:

Step 601, determining data to be sent to inactive UE on a base station, wherein the base station is a currently serving base station of the UE;

step 602, sending the data to the UE in inactive state through radio bearer.

in the implementation, the data to be sent to inactive UE is sent by the core network through the anchor base station of the UE;

In an implementation, the radio bearer is a data radio bearer established according to a preset configuration, and further includes:

Receiving related information of a data radio bearer which is sent by an anchor point base station of the UE and is established according to preset configuration, and sending the data to the UE under an inactive state through a DRB which is established according to the preset configuration according to the related information, wherein the related information of the DRB which is established according to the preset configuration comprises one or the combination of the following information:

in an implementation, the radio bearer is a data radio bearer reserved by an anchor base station of the UE, further comprising:

In implementation, the radio bearer is SRB2 established by the base station according to a preset configuration, and the data is sent from SRB2 to the UE in an inactive state through NAS signaling according to the SRB2 related information of the UE;

or, the radio bearer is the SRB2 reserved by the anchor base station of the UE, and the data is sent from the SRB2 to the UE in the inactive state through NAS signaling according to the information related to the SRB2 of the UE;

or, the radio bearer is SRB1 established by the base station according to a preset configuration, and the data is sent from SRB1 to the UE in an inactive state through RRC signaling according to the SRB1 related information of the UE;

or, the radio bearer is the SRB1 reserved by the anchor base station of the UE, and the data is sent from the SRB1 to the UE in the inactive state through RRC signaling according to the information related to the SRB1 of the UE.

fig. 7 is a schematic flow chart of an implementation of a downlink data receiving method on a UE side, as shown in the figure, the implementation may include:

Step 701, determining a radio bearer between an inactive UE and a currently serving base station;

step 702, receiving data sent by the currently serving base station through the radio bearer in an inactive state.

in implementation, the radio bearer is a DRB established according to a preset configuration, and after processing the data according to the preset configuration of the DRB on the UE, the processed data is sent to a higher layer.

In the implementation, the radio bearer is a DRB reserved at an anchor base station of the UE, and the data is processed at the UE according to the configuration of the DRB and then sent to a higher layer.

In implementation, the radio bearer is SRB2 established by the base station according to a preset configuration, and receives data sent by the base station from SRB2 to the UE in an inactive state through NAS signaling according to the SRB2 related information of the UE;

or, the radio bearer is the SRB2 reserved by the anchor base station of the UE, and receives data sent by the base station from the SRB2 to the UE in the inactive state through NAS signaling according to the information related to the SRB2 of the UE;

or, the radio bearer is SRB1 established by the base station according to a preset configuration, and receives data sent by the base station from SRB1 to the UE in an inactive state through an RRC signaling according to the SRB1 related information of the UE;

Or, the radio bearer is the SRB1 reserved by the anchor base station of the UE, and receives data sent by the base station from the SRB1 to the UE in the inactive state through the RRC signaling according to the information related to the SRB1 of the UE.

in the following description, the default classification of the DRB, the reserved DRB, the SRB2, and the SRB1, which is established according to the preset configuration, is described, and in each classification, the implementation of uplink data transmission from the UE to the core network is described first, and then the implementation of downlink data transmission from the core network to the UE is described.

example 1:

The present embodiment is a scheme for data transmission using a default DRB.

Firstly, uplink transmission.

after the UE enters the power-saving Inactive state due to no data transmission for a long time, if the UE moves out of the coverage of its anchor base station, it is currently attached under a new serving base station.

if the UE has uplink data to send at this time, it may be as follows:

1. The UE needs to send uplink data, the UE first needs to determine whether the current serving base station is its anchor base station, and if the current serving base station is another base station other than the anchor base station, the UE needs to newly establish a default DRB for the uplink data, the ID of the DRB is preconfigured, and the related configuration of layer 1 and layer 2 related to the DRB is also preconfigured, and the preconfigured manner may be as follows:

(1) The method is characterized in that the method is defined by using a standard, one mode is to define a set of default DRB configuration and ID by using the standard, all services of UE use the configuration and ID, or define different configuration tables and IDlist for different services/different UE types, the UE selects according to the type and service type of the UE, and the selection mode can be standardized;

before the UE enters an inactive state, the UE is configured by a network side dedicated signaling, which can be a set of configuration and ID for all services, or a plurality of sets of configuration and ID, and the selection is different according to different service types, and the selection mode can be carried while the configuration is carried.

(2) other modes are adopted, such as notification of the current serving base station, or UE subscription information specification, etc.

2. the state variables of layer two are started from initial values when the DRB is used to transmit the data to the currently serving base station.

Specifically, the UE uses the default DRB for transmitting the service data, since this is a newly established DRB, the various state variables of layer two are all started from initial values, for example, 0. The transmission mode can be that the UE requests the network side to give a dedicated resource, or the UE sends the dedicated resource on an uplink competitive resource, and the UE needs to carry an inactive ID of the UE in the uplink information; that is, when the DRB established according to the preset configuration is used to transmit the data to the currently serving base station, the method may further include:

The base station UE is notified of the inactive ID. .

Specifically, there may be many implementation manners, for example, the inactive ID of the UE may be carried in the transmitted uplink information, the first uplink information carries the ID, after the two parties confirm the identities, the subsequent possibly interacting with other IDs, or the ID may be continuously used.

3. For the network side, when receiving the data and inactive ID of the UE, the current serving base station knows that the current serving base station is an inactive UE, if the default DRB configuration is known to the current serving base station, for example, the standard specification or the current base station configuration, the current serving base station may directly establish a corresponding DRB for processing the data of the UE, and if the default DRB configuration is unknown to the current serving base station, the current serving base station may request the anchor base station of the UE for context data of the UE, so as to obtain related information.

In specific implementation, the inactive ID of the UE carries ID information of the anchor base station and part of the UE ID information, so that the current serving base station can accurately find the anchor base station and further acquire the UE information, and the UE information to be acquired mainly includes:

the configuration information of the DRB is established according to preset configuration, specifically, the DRB configuration is defaulted, and if the service base station of the default DRB information is unclear, the relevant configuration needs to be acquired from the anchor base station;

UE security-related parameter information, specifically, UE security-related content, if security such as encryption is enabled, security parameters such as a key and an encryption algorithm need to be obtained;

The core network bearer information corresponding to the UE related service, specifically, the core network bearer information corresponding to the UE related service, for example, Serving Gateway (SGW) information, and the pipe information, for example, a Tunnel End Identifier (TEID) corresponding to an Evolved Packet System (EPS) bearer.

After the current serving base station acquires the UE information, the data of the UE may be processed, and the UE information is sent to a corresponding core network user plane node or an anchor base station of the UE for subsequent transmission. Namely:

One is that the service base station acquires detailed UE information, and the service base station analyzes UE data and directly sends the UE data to the core network node;

and the service base station directly sends the bottom layer data of the UE to the anchor base station, and the bottom layer data is analyzed by the anchor base station and then sent to the core network node.

And II, downlink transmission.

If the inactive UE has downlink data to send, it may be as follows:

For the core network, it considers that inactive UE is attached to the anchor base station, so the data of the UE will be sent to the anchor base station first, then the anchor base station will initiate a paging process for the UE to obtain the current serving base station address of the UE, the anchor base station sends the downlink data of the UE to the current serving base station of the UE, and meanwhile, the downlink data of the UE may carry context information of some UEs, and the context information may include:

default DRB configuration, if the default DRB is not specified by a standard or serving base station, but agreed between the anchor base station and the UE, the information needs to be transferred, otherwise it is not needed;

UE security related content, if security such as encryption needs to be opened, security parameters such as a secret key and an encryption algorithm need to be acquired;

after the current serving base station acquires the UE information and data, it sends its downlink data to the UE with the configuration of the default DRB.

the UE receives the downlink data, processes the downlink data according to the configuration of the default DRB, analyzes the user data and sends the user data to a high layer.

in implementation, when data is transmitted through a DRB established according to a preset configuration, the ID of the DRB established this time is different from the ID of the DRB deleted after the DRB was established last time.

specifically, if a default newly-built DRB needs to be adopted for sending uplink and downlink data of the UE and security is started, the ID of the DRB needs to be different every time. For example, DRBs 0-29 are the ID ranges used by the normally connected DRBs. The DRB30-100 is the default DRB used by inactive UEs, so when the UE transmits data for the first time, the DRB30 is used, and after the data transmission is finished, the DRB is deleted. For the next use, DRB31 is used, and so on.

example 2:

the embodiment is a scheme for performing data transmission by using a DRB corresponding to a service.

firstly, uplink transmission.

if the UE has uplink data to send at this time, it may be as follows:

If the UE has uplink data to be sent, the UE directly selects a DRB corresponding to the service to transmit;

after the UE enters inactive, the DRBs in the connected state of the UE may be all reserved, because the service is not ended, and therefore the DRBs corresponding to the service are all reserved. Or, there is no data for a long time, before the inactive, only one or several DRBs are reserved, and the mapping rule of the service to the DRBs is configured to a certain extent, if it is a DRB, all data of the UE are mapped to the DRB, if several DRBs may have different priorities and configurations, data meeting what characteristics are configured to be mapped to a DRB with high priority or high configuration, and the rest services are mapped to a DRB with low priority or low configuration.

It is easy to know that before the UE enters the Inactive, the network determines that both the UE and the anchor base station will keep certain DRB configuration and entity and mapping rules of DRBs and services, and the states of both sides about these DRBs are synchronous.

for the current service base station of the network side UE, when receiving the data and the inactive ID of the UE, the current service base station learns that the UE is in an inactive state, if the current service base station is exactly the anchor base station of the UE, all DRB information of the UE is also reserved, at this time, the data of the UE can be processed by related DRB configuration and then transmitted to a core network user plane entity. If the current serving base station is not the anchor base station of the UE, the current serving base station needs to send the underlying data of the UE to the anchor base station for processing, or request the anchor base station for the information of the UE.

the inactive ID of the UE carries the ID information of the anchor base station and part of the ID information of the UE, so that the current service base station can accurately find the anchor base station and further find the UE information, and the UE information to be acquired can include:

relevant DRB configuration and state information, configuration of DRBs used by the UE to send data, and all transmission state information, such as values of transmission variables;

UE security related content, if security such as encryption is started, security parameters such as a secret key and an encryption algorithm need to be obtained;

The core network corresponding to the UE related service carries information, such as SGW information and pipe information (TEID corresponding to EPS bearer).

After the current serving base station acquires the UE information, the current serving base station may process the data of the UE, and then send the UE information to the corresponding core network user plane node for subsequent transmission.

The UE may update the previous state variable information during transmission at the current serving base station, because in the case of bearer reservation, the current state variable information of the UE needs to be obtained first, added and updated on the information, and after the transmission is completed, the anchor base station needs to be updated to store the latest state of the UE. Therefore, the method can further comprise the following steps: when data is transmitted using the reserved radio bearer, previous state variable information that changes due to the data transmission is updated to the anchor base station.

specifically, for example, if the UE is in AM (Acknowledged Mode), the UE has previously sent data with SN (Sequence Number) of 1 to 5, and currently sends data with SN of 6, and this data sending will adopt a timely feedback acknowledgement manner, for example, the last data packet carries a P bit, which requires to acknowledge all the data sent this time, and an L2 signaling interaction process may also be introduced, so as to ensure that both sides acknowledge that this data sending has ended and all acknowledgements have been correctly received.

In the implementation, one or a combination of the following processes can be further included:

When the PDCP layer is processed, the SN and/or the Count obtained from the anchor point base station are continuously maintained;

resetting the transmission state when entering an inactive state when a layer which ensures transmission is processed;

When the layer which ensures transmission is processed, resetting the transmission state after the data transmission is finished each time;

when the layer for which transmission is guaranteed is processed, the transmission state is reset after the serving base station is replaced.

Specifically, for the layer responsible for security, for example, PDCP, for security, its SN needs to be continuous, that is, when the UE enters inactive state, the PDCP Count is 500, and then the subsequent packet transmission Count value is continuously increased and continuously maintained. The states of other layers, such as RLC and MAC, which only guarantee transmission may be reset each time, for example, when an Inactive UE is in the serving base station 1, data needs to be transmitted, the serving base station 1 is different from the anchor base station, the RLC state variable is assumed to start from an initial value, for example, 0, after the transmission is completed, the RLC peer confirms that all data are successfully transmitted and received, and the RLC layer peer may interact with signaling, reset the RLC, and start from the initial value again, for example, 0. Or when the UE comes to a new serving base station, the RLC is reset.

The replacement base station is a case when the UE moves to another base station and the serving base station changes.

and II, downlink transmission.

if the inactive UE has downlink data to send, it may be as follows:

For the core network, it is considered that inactive UE is attached to an anchor base station, so data of the UE is first sent to the anchor base station, and then the anchor base station initiates a paging process for the UE to obtain an address of a current serving base station of the UE, and the anchor base station sends downlink data of the UE to the current serving base station of the UE, and simultaneously carries some context information of the UE, which may include:

Data radio bearer configuration and status information, the data radio bearer should be a data radio bearer corresponding to the service;

after the current serving base station acquires the UE information and data, the downlink data of the current serving base station is sent to the UE according to the configuration and the state variable of the data radio bearer.

The UE receives the downlink data, processes the downlink data by the configuration and the state variable of the radio bearer of the related data, analyzes the user data and sends the user data to a high layer.

in the implementation, the method can further comprise the following steps:

After the data transmission is finished, explicit reset processing is carried out in a layer two signaling mode. If the transmission end reset needs to be performed on some layers, an explicit reset process can be performed in a layer two signaling manner.

in the implementation, the method can further comprise the following steps:

When UE initiates a corresponding service on a data radio bearer reserved by an anchor point base station of the UE, continuous security layer state variables are adopted, and the state variables of other layers start from initial values each time. The UE initiates the service again at intervals, the state variable of the security layer is continuous, and the state variable of other layers starts from the initial value each time.

in the implementation, the method can further comprise the following steps:

in specific implementation, the UE uses the original DRB configuration and the state variable corresponding to the service to complete the uplink/downlink transmission. It should be noted that, this transmission inevitably updates the value of the state variable, especially the value of the state variable of the continuous security layer, for example, the security layer count value is increased from 500 to 505, which means that 5 data packets are newly transmitted, because the state variable of the security layer needs to be continuous, and therefore after the service is ended, the current serving base station needs to notify the anchor base station of the updated value of the state variable that is kept continuous. The Anchor base station will store and update the variable. The count value is counted from 506 the next time the UE needs to send data. The storage of the continuous state variable may be bidirectional, e.g. for the network side it records downstream sent to 505, upstream received 302, etc. If the state variables of other layers are reset, the anchor base station is not required to be notified, and the anchor base station is required to be notified next time from the initial value if the state variables of other layers also need to be continuous.

example 3:

this embodiment is a scheme of data transmission using NAS signaling SRB 2.

firstly, uplink transmission.

if the UE has uplink data to send, the following steps may be performed:

data may be placed in NAS (Non Access Stratum) signaling, sent with the recovered SRB2 or with the newly created default SRBi;

The recovered SRB2 refers to a signaling bearer maintained by the UE before, and the UE stores all its configuration and state variable values, and can directly send new data in the SRB 2. For the network side, the current serving base station may directly send the received bottom layer data to the anchor base station of the UE for subsequent processing, or may request the anchor base station for context information of the UE, such as SRB2 configuration and state information and core network user plane path information, to analyze NAS signaling information, and send the NAS signaling information to a corresponding core network control entity according to the core network user plane path information, to analyze the NAS signaling, and subsequently analyze data to perform data processing.

The implementation of the newly-established default SRBi can adopt a mode similar to the default DRB, the UE and the current service base station adopt the configuration of the default SRBi to carry out NAS signaling transmission, the subsequent current service base station can forward the data to the Anchor base station for processing, and can also directly acquire the information of the UE, the information is sent to a core network control surface entity after being analyzed, the NAS signaling is analyzed, and the data is analyzed subsequently to carry out data processing.

And II, downlink transmission.

when downlink data is sent, if the downlink data is placed in the NAS signaling, the core network control plane entity sends the NAS signaling and the transmission configuration to the anchor base station of the UE, and the anchor base station sends the NAS signaling and the transmission configuration to the current serving base station and the current serving base station to the UE. The bearer type is also the restored SRB2 or the newly created default SRBi.

Example 4:

this embodiment is a scheme for data transmission using RRC signaling SRB 1.

firstly, uplink transmission.

If the UE has uplink data to send, the following steps may be performed:

data may be placed in RRC (Radio Resource Control) signaling, sent with the recovered SRB1 or with the newly created default SRBj;

The RRC signaling carries UE data, specific information of the data needs to be carried, and a type of the data needs to be explicitly indicated, for example, according to an existing DRB, which DRB the data should correspond to, or according to a flow characteristic, so that after the data is analyzed from the RRC signaling, how to map the data with a data path of the core network can be known.

The recovered SRB1 refers to a signaling bearer maintained by the UE before, and the UE stores all its configuration and state variable values, and can directly send new data in the SRB 1. For the network side, the current serving base station may directly send the received bottom layer data to the anchor base station of the UE for subsequent processing, or may request the anchor base station for context information of the UE, such as SRB1 configuration and state information and core network user plane path information, to analyze data in the RRC signaling, and send the data to a corresponding core network user plane entity according to the core network user plane path information for subsequent data processing.

the newly-established default SRBj can adopt a mode similar to the default DRB in implementation, the UE and the current service base station adopt the configuration of the default SRBj to carry out RRC signaling transmission, the subsequent current service base station can forward the data to the Anchor base station for processing, and can also directly acquire the information of the UE, analyze a data packet from the RRC signaling, and send the data packet to a core network user plane entity after analysis for subsequent data processing.

and II, downlink transmission.

And sending downlink data, namely sending the downlink data to an anchor base station of the UE by a core network user plane entity, sending the data and transmission configuration to the current service base station by the anchor base station, and sending the data and the transmission configuration to the UE by placing the current service base station in an RRC signaling. The bearer type is also the recovered SRB1 or the newly created default SRBj.

Based on the same inventive concept, the embodiment of the present invention further provides a data transmission device, and because the principles of solving the problems of these devices are similar to the data transmission method, the implementation of these devices can refer to the implementation of the method, and the repeated parts are not described again.

fig. 8 is a schematic structural diagram of a data transmitting apparatus on the UE side, which may include:

An uplink determining module 801, configured to determine data that an inactive UE needs to send to a currently serving base station;

an uplink sending module 802, configured to send the data to a currently serving base station through a radio bearer in an inactive state.

in implementation, the radio bearer is a data radio bearer established according to a preset configuration;

Alternatively, the radio bearer is a signaling radio bearer reserved by the UE.

in implementation, the preset configuration is configured by a network-side dedicated signaling or is configured on the UE in advance, and when a data radio bearer or a signaling radio bearer is established according to the preset configuration, the configuration for establishing the data radio bearer or the signaling radio bearer is selected according to the type and/or the service type of the UE;

In an implementation, the uplink data sending module is further configured to notify the inactive ID of the base station UE when sending the data to the currently serving base station using the data radio bearer.

fig. 9 is a schematic structural diagram of a data receiving apparatus on a base station side, as shown in the figure, it may include:

an uplink data receiving module 901, configured to receive data sent by an inactive UE through a radio bearer on a base station, where the base station is a currently serving base station of the UE;

An uplink data sending module 902, configured to send the data to the core network node.

In implementation, the radio bearer is a data radio bearer established according to a preset configuration, acquires data radio bearer related information of the UE from an anchor base station of the UE, processes the data according to the related information, and sends the processed data to a core network node;

In the implementation, the anchor base station of the UE is determined according to the inactive ID notified by the UE.

In an implementation, the data radio bearer related information includes one or a combination of the following information:

in an implementation, the signaling radio bearer related information includes one or a combination of the following information:

In an implementation, the uplink data sending module is further configured to update, to the anchor base station, previous state variable information that changes due to data transmission when the data is transmitted using the reserved radio bearer.

in an implementation, the uplink data sending module is further configured to perform processing including one or a combination of the following:

Fig. 10 is a schematic structural diagram of a data transmission apparatus on the current serving base station side, which may include:

A downlink data determining module 1001, configured to determine, on a base station, data that needs to be sent to an inactive UE, where the base station is a currently serving base station of the UE;

A downlink data sending module 1002, configured to send the data to the inactive UE through a radio bearer.

In an implementation, the downlink data sending module is further configured to, when sending data through a data radio bearer established according to a preset configuration, determine that an ID of the data radio bearer established this time is different from an ID of the data radio bearer deleted after the last establishment.

in implementation, the downlink data sending module is further configured to perform explicit reset processing in a layer two signaling manner after data transmission is finished.

in implementation, the downlink data sending module is further configured to adopt continuous security layer state variables when the UE initiates a corresponding service on a data radio bearer reserved by an anchor base station of the UE, where the state variables of other layers start from initial values each time.

In an implementation, the downlink data sending module is further configured to notify the anchor base station of the UE of the security layer state variable.

In implementation, the radio bearer is a signaling radio bearer established by the base station according to a preset configuration, and the data is sent from the signaling radio bearer to the inactive UE through NAS signaling or RRC signaling according to the signaling radio bearer related information of the UE;

fig. 11 is a schematic structural diagram of a data transmission apparatus on an anchor base station side, as shown in the figure, the data transmission apparatus may include:

A downlink determining module 1101, configured to determine, on a base station, data that needs to be sent to an inactive UE, where the base station is an anchor base station of the UE;

a downlink sending module 1102, configured to send the data to a currently serving base station of the UE.

In an implementation, the downlink sending module is further configured to send, to a currently serving base station of the UE, information related to a data radio bearer reserved by an anchor base station of the UE, where the information related to the reserved data radio bearer includes one or a combination of the following information:

In implementation, the downlink sending module is further configured to send information related to the data radio bearer established according to the preset configuration to a currently serving base station of the UE, where the information related to the data radio bearer established according to the preset configuration includes one or a combination of the following information:

Fig. 12 is a schematic structural diagram of a data receiving apparatus on the UE side, as shown in the figure, the data receiving apparatus may include:

A downlink bearer determining module 1201, configured to determine a radio bearer between an inactive UE and a currently serving base station;

A downlink receiving module 1202, configured to receive, in an inactive state, data sent by a currently serving base station through a radio bearer.

in an implementation, the downlink receiving module is further configured to, when the radio bearer is a data radio bearer established according to a preset configuration, process the data on the UE according to the preset configuration of the data radio bearer, and then send the processed data to a higher layer.

in an implementation, the downlink receiving module is further configured to, when receiving data through a data radio bearer established according to a preset configuration, determine that an ID of the data radio bearer established this time is different from an ID of the data radio bearer deleted after the last establishment.

in an implementation, the downlink receiving module is further configured to, when the radio bearer is a data radio bearer reserved by an anchor base station of the UE, process the data on the UE according to configuration of the data radio bearer, and send the processed data to a higher layer.

In implementation, the downlink receiving module is further configured to perform explicit reset processing in a layer two signaling manner after data transmission is finished.

In implementation, the downlink receiving module is further configured to adopt continuous security layer state variables when initiating a corresponding service on a data radio bearer reserved by the anchor base station of the UE, where the state variables of other layers start from initial values each time.

In implementation, the downlink receiving module is further configured to receive, according to the signaling radio bearer related information of the UE, data sent by the base station from the signaling radio bearer to the UE in an inactive state through NAS signaling or RRC signaling when the radio bearer is the signaling radio bearer established by the base station according to the preset configuration; or, when the radio bearer is a signaling radio bearer reserved by the anchor base station of the UE, receiving data sent by the base station from the signaling radio bearer to the UE in an inactive state through NAS signaling or RRC signaling according to the signaling radio bearer related information of the UE.

for convenience of description, each part of the above-described apparatus is separately described as being functionally divided into various modules or units. Of course, the functionality of the various modules or units may be implemented in the same one or more pieces of software or hardware in practicing the invention.

when the technical scheme provided by the embodiment of the invention is implemented, the implementation can be carried out as follows.

fig. 13 is a schematic diagram of a UE structure in uplink, as shown in the figure, a UE includes:

A processor 1300, for reading the program in the memory 1320, for executing the following processes:

a transceiver 1310 for receiving and transmitting data under the control of the processor 1300, performing the following processes:

alternatively, the radio bearer is a signaling radio bearer reserved by the UE.

in an implementation, when the data is transmitted to the currently serving base station using the data radio bearer, the method further includes: the base station UE is notified of the inactive ID.

In fig. 13, among other things, the bus architecture may include any number of interconnected buses and bridges with various circuits being linked together, particularly one or more processors represented by processor 1300 and memory represented by memory 1320. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1310 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. User interface 1330 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1300 is responsible for managing the bus architecture and general processing, and the memory 1320 may store data used by the processor 1300 in performing operations.

Fig. 14 is a schematic structural diagram of a base station in uplink, and as shown in the figure, the base station includes:

The processor 1400 is used for reading the program in the memory 1420 and executing the following processes:

Processing data according to the requirement of the transceiver;

A transceiver 1410 for receiving and transmitting data under the control of the processor 1400, performing the following processes:

the data is sent to the core network node.

in an implementation, the method further comprises the following steps: when data is transmitted using the reserved radio bearer, previous state variable information that changes due to the data transmission is updated to the anchor base station.

In an implementation, the method further comprises the following steps: when the PDCP layer is processed, the SN and/or Count obtained from the anchor base station are continuously maintained.

Where in fig. 14 the bus architecture may include any number of interconnected buses and bridges, in particular one or more processors, represented by the processor 1400, and various circuits of memory, represented by the memory 1420, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1410 may be a number of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 1400 is responsible for managing the bus architecture and general processing, and the memory 1420 may store data used by the processor 1400 in performing operations.

fig. 15 is a schematic structural diagram of a currently serving base station in downlink, where as shown in the figure, the base station includes:

The processor 1500, which is used to read the program in the memory 1520, executes the following processes:

a transceiver 1510 for receiving and transmitting data under the control of the processor 1500, performing the following processes:

and sending the data to the UE in the inactive state through a radio bearer.

in the implementation, when data is sent through the data radio bearer established according to the preset configuration, the ID of the data radio bearer established this time is different from the ID of the data radio bearer deleted after the last establishment.

In an implementation, the method further comprises the following steps:

in an implementation, the method further comprises the following steps:

in fig. 15, among other things, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1500 and various circuits of memory represented by memory 1520 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1510 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 1500 is responsible for managing the bus architecture and general processing, and the memory 1520 may store data used by the processor 1500 in performing operations.

fig. 16 is a schematic structural diagram of an anchor base station in downlink, and as shown in the figure, the base station includes:

The processor 1600, which is used to read the program in the memory 1620, executes the following processes:

a transceiver 1610 configured to receive and transmit data under the control of the processor 1600, the following processes being performed:

And sending the data to a current serving base station of the UE.

In an implementation, the method further comprises the following steps:

in an implementation, the method further comprises the following steps:

In fig. 16, among other things, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by the processor 1600 and various circuits of the memory represented by the memory 1620 linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1610 can be a plurality of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 1600 is responsible for managing the bus architecture and general processing, and the memory 1620 may store data used by the processor 1600 in performing operations.

fig. 17 is a schematic structural diagram of a UE in downlink, where as shown, a user equipment includes:

a processor 1700 configured to read the program in the memory 1720 and execute the following processes:

a transceiver 1710 for receiving and transmitting data under the control of the processor 1700, performing the following processes:

In implementation, the radio bearer is a data radio bearer established according to a preset configuration, and after the data is processed on the UE according to the preset configuration of the data radio bearer, the processed data is sent to a higher layer.

in the implementation, when receiving data through a data radio bearer established according to a preset configuration, the ID of the data radio bearer established this time is different from the ID of the data radio bearer deleted after the last establishment.

in implementation, the radio bearer is a data radio bearer reserved at an anchor base station of the UE, and after processing the data on the UE according to configuration of the data radio bearer, the processed data is sent to a higher layer.

in an implementation, the method further comprises the following steps:

In implementation, the radio bearer is a signaling radio bearer established by the base station according to a preset configuration, and receives data sent by the base station from the signaling radio bearer to the inactive UE through NAS signaling or RRC signaling according to the signaling radio bearer related information of the UE;

in fig. 17, among other things, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1700 and various circuits of memory represented by memory 1720 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1710 may be a number of elements including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium. The user interface 1730 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1700 is responsible for managing the bus architecture and general processing, and the memory 1720 may store data used by the processor 1700 in performing operations.

in summary, in the technical solution provided in the embodiment of the present invention, when sending uplink and downlink data for a UE in an Inactive state, a manner of recovering an existing DRB or SRB may be adopted, or a manner of creating a default SRB or DRB may be adopted, so as to complete air interface transmission. The current serving base station needs to request the bearer configuration and state variable value from the anchor base station of the UE to recover the existing bearer mode, update the bearer configuration and state variable value on the basis of the existing state variable, and after the transmission is completed, the current serving base station needs to send the updated state variable to the anchor base station.

it is easy to see that, by adopting the scheme, the UE can complete data transmission without state transition, thereby reducing the complexity of the signaling process, ensuring the quality of service transmission and saving the electric quantity of the UE.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

these computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

it will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. a data transmission method, comprising:

sending the data to a currently serving base station by recovering or configuring a specific radio bearer in an inactive state, wherein the specific radio bearer comprises a data radio bearer and a signaling radio bearer;

The specific radio bearer is a data radio bearer established according to a preset configuration;

or, the specific radio bearer is a data radio bearer determined by determining a service to which data to be sent to a currently serving base station belongs according to a mapping relationship between the service and a data radio bearer reserved by the UE;

Or, the specific radio bearer is a signaling radio bearer established according to a preset configuration;

alternatively, the specific radio bearer is a signaling radio bearer reserved by the UE.

2. the method of claim 1, wherein the preset configuration is configured by network-side dedicated signaling or is pre-configured on the UE, and when the data radio bearer or the signaling radio bearer is established according to the preset configuration, the configuration for establishing the data radio bearer or the signaling radio bearer is selected according to a type and/or a service category of the UE;

3. the method of claim 1, wherein in transmitting the data to a currently serving base station using a data radio bearer, further comprising:

the base station UE is notified of the inactive ID.

4. A data receiving method, comprising:

Receiving data sent by inactive UE through recovering or configuring a specific radio bearer on a base station, wherein the base station is a currently serving base station of the UE, and the specific radio bearer comprises a data radio bearer and a signaling radio bearer;

sending the data to a core network node;

the specific radio bearer is a data radio bearer established according to preset configuration, acquires data radio bearer related information of the UE from an anchor point base station of the UE, processes the data according to the related information, and sends the processed data to a core network node;

Or, the specific radio bearer is a data radio bearer established according to a preset configuration, and after the data is handed to the anchor point base station of the UE for processing, the anchor point base station of the UE sends the processed data to the core network node;

Or, the specific radio bearer is a data radio bearer reserved by an anchor base station of the UE, and the base station processes the data according to the configuration of the data radio bearer and then sends the processed data to the core network node;

Or, the specific radio bearer is a signaling radio bearer established by the base station according to a preset configuration, acquires signaling radio bearer related information of the UE from an anchor base station of the UE, processes the data according to the related information, and sends the processed data to a core network node;

or, the specific radio bearer is a signaling radio bearer established by the base station according to a preset configuration, and after the data is handed to the anchor point base station of the UE for processing, the anchor point base station of the UE sends the processed data to the core network node;

Or, the specific radio bearer is a signaling radio bearer reserved by the anchor base station of the UE, acquires signaling radio bearer related information of the UE from the anchor base station of the UE, processes the data according to the related information, and sends the processed data to the core network node;

Or, the specific radio bearer is a signaling radio bearer reserved by the anchor base station of the UE, and the anchor base station of the UE sends the processed data to the core network node after handing the data to the anchor base station of the UE.

5. The method of claim 4, wherein the anchor base station of the UE is determined according to an inactive ID notified by the UE.

6. The method of claim 4, wherein the data radio bearer related information comprises one or a combination of:

7. the method of claim 4, wherein the signaling radio bearer related information comprises one or a combination of:

8. the method of claim 4, further comprising:

9. The method of claim 4, further comprising:

10. A method of data transmission, comprising:

sending the data to the UE in an inactive state by recovering or configuring a specific radio bearer, wherein the specific radio bearer comprises a data radio bearer and a signaling radio bearer;

Or, the specific radio bearer is a data radio bearer reserved by an anchor base station of the UE;

Or, the specific radio bearer is a signaling radio bearer established by the base station according to a preset configuration, and the data is sent from the signaling radio bearer to the inactive UE through NAS signaling or RRC signaling according to the signaling radio bearer related information of the UE;

Or, the specific radio bearer is a signaling radio bearer reserved by the anchor base station of the UE, and the data is sent from the signaling radio bearer to the inactive UE through NAS signaling or RRC signaling according to the signaling radio bearer related information of the UE.

11. The method of claim 10, wherein the data to be sent to the inactive UE is sent by a core network via an anchor base station of the UE;

12. The method of claim 11, wherein the specific radio bearer is a data radio bearer established in a preset configuration, further comprising:

13. the method of claim 12, wherein when transmitting data through the data radio bearer established according to the preset configuration, an ID of the data radio bearer established this time is different from an ID of the data radio bearer deleted after the last establishment.

14. the method of claim 11, wherein the particular radio bearer is a data radio bearer reserved by an anchor base station of the UE, further comprising:

15. the method of claim 14, further comprising:

16. The method of claim 14, further comprising:

17. The method of claim 16, further comprising:

18. A data transmission method, comprising:

Sending the data to a currently serving base station of the UE, so that the currently serving base station of the UE sends the data to the UE in an inactive state by recovering or configuring a specific radio bearer, wherein the specific radio bearer comprises a data radio bearer and a signaling radio bearer;

19. The method of claim 18, wherein the data required to be sent to inactive UEs is sent by a core network.

20. The method of claim 18, further comprising:

21. The method of claim 18, further comprising:

22. a data receiving method, comprising:

receiving data sent by a currently serving base station through recovering or configuring a specific radio bearer in an inactive state, wherein the specific radio bearer comprises a data radio bearer and a signaling radio bearer;

or, the specific radio bearer is a data radio bearer reserved at an anchor base station of the UE;

or, the specific radio bearer is a signaling radio bearer established by the base station according to a preset configuration, and receives data sent by the base station from the signaling radio bearer to the inactive UE through NAS signaling or RRC signaling according to the signaling radio bearer related information of the UE;

Or, the specific radio bearer is a signaling radio bearer reserved by the anchor base station of the UE, and receives data sent by the base station from the signaling radio bearer to the UE in an inactive state through NAS signaling or RRC signaling according to the signaling radio bearer related information of the UE.

23. the method of claim 22, wherein the specific radio bearer is a data radio bearer established according to a preset configuration, and wherein the data is processed according to the preset configuration of the data radio bearer at the UE, and then the processed data is sent to a higher layer.

24. The method of claim 23, wherein when receiving data through the data radio bearer established according to the preset configuration, an ID of the data radio bearer established this time is different from an ID of the data radio bearer deleted after the last establishment.

25. The method of claim 22, wherein the specific radio bearer is a data radio bearer reserved at an anchor base station of the UE, and wherein the data is processed at the UE according to a configuration of the data radio bearer and then transmitted to a higher layer.

26. the method of claim 25, further comprising:

27. the method of claim 25, further comprising:

28. A data transmission apparatus, comprising:

an uplink sending module, configured to send the data to a currently serving base station by recovering or configuring a specific radio bearer in an inactive state, where the specific radio bearer includes a data radio bearer and a signaling radio bearer;

29. the apparatus of claim 28, wherein the preset configuration is configured by network-side dedicated signaling or is pre-configured on the UE, and when the data radio bearer or the signaling radio bearer is established according to the preset configuration, the configuration for establishing the data radio bearer or the signaling radio bearer is selected according to a type and/or a service category of the UE;

30. the apparatus of claim 28, wherein the uplink data sending module is further for notifying an inactive ID of a base station UE when sending the data to a currently serving base station using a data radio bearer.

31. a data receiving device, comprising:

An uplink data receiving module, configured to receive data sent by an inactive UE through recovering or configuring a specific radio bearer on a base station, where the base station is a currently serving base station of the UE, and the specific radio bearer includes a data radio bearer and a signaling radio bearer;

an uplink data sending module, configured to send the data to a core network node;

32. the apparatus of claim 31, wherein the anchor base station of the UE is determined according to inactive ID notified by the UE.

33. the apparatus of claim 31, wherein the data radio bearer related information comprises one or a combination of:

34. The apparatus of claim 31, wherein the signaling radio bearer related information comprises one or a combination of:

35. the apparatus of claim 31, wherein the uplink data sending module is further for updating previous state variable information changed for data transmission to the anchor base station when transmitting data using a reserved radio bearer.

36. the apparatus of claim 31, wherein the uplink data sending module is further configured to continuously maintain SNs and/or counts obtained from the anchor base station while the PDCP layer is processing.

37. a data transmission apparatus, comprising:

a downlink data sending module, configured to send the data to the inactive UE by recovering or configuring a specific radio bearer, where the specific radio bearer includes a data radio bearer and a signaling radio bearer;

38. The apparatus of claim 37, wherein the data to be sent to the inactive UE is sent by a core network via an anchor base station of the UE;

39. the apparatus of claim 38, wherein the particular radio bearer is a data radio bearer established in a preset configuration, further comprising:

40. the apparatus of claim 39, wherein the downlink data sending module is further configured to, when sending data through the data radio bearer established according to the preset configuration, the ID of the currently established data radio bearer is different from the ID of the data radio bearer deleted after the previous establishment.

41. The apparatus of claim 38, wherein the particular radio bearer is a data radio bearer reserved by an anchor base station of the UE, further comprising:

42. The apparatus of claim 41, wherein the downlink data sending module is further configured to perform an explicit reset process in a layer two signaling manner after the data transmission is finished.

43. the apparatus of claim 41, wherein the downlink data sending module is further configured to use continuous security layer state variables when the UE initiates a corresponding service on a data radio bearer reserved by an anchor base station of the UE, and the state variables of other layers start from initial values each time.

44. the apparatus of claim 43, wherein the downlink data sending module is further for informing an anchor base station of the UE of the security layer state variable.

45. A data transmission apparatus, comprising:

a downlink sending module, configured to send the data to a currently serving base station of the UE, so that the currently serving base station of the UE sends the data to the UE in an inactive state by recovering or configuring a specific radio bearer, where the specific radio bearer includes a data radio bearer and a signaling radio bearer;

46. The apparatus of claim 45, wherein the data needed to be sent to inactive UEs is sent by a core network.

47. The apparatus of claim 45, wherein the downlink transmitting module is further configured to transmit information related to a data radio bearer reserved by an anchor base station of the UE to a currently serving base station of the UE, wherein the information related to the reserved data radio bearer includes one or a combination of the following information:

48. The apparatus of claim 45, wherein the downlink sending module is further configured to send information related to the data radio bearer established according to the preset configuration to a currently serving base station of the UE, wherein the information related to the data radio bearer established according to the preset configuration includes one or a combination of the following information:

49. A data receiving device, comprising:

A downlink receiving module, configured to receive, in an inactive state, data sent by a currently serving base station through recovery or configuration of a specific radio bearer, where the specific radio bearer includes a data radio bearer and a signaling radio bearer;

50. the apparatus of claim 49, wherein the downlink receiving module is further configured to, when the radio bearer is a data radio bearer established according to a preset configuration, process the data according to the preset configuration of the data radio bearer on the UE, and then send the processed data to a higher layer.

51. The apparatus of claim 50, wherein the downlink receiving module is further configured to, when receiving data through a data radio bearer established according to a preset configuration, an ID of the currently established data radio bearer is different from an ID of a data radio bearer deleted after the previous establishment.

52. The apparatus of claim 49, wherein the downlink receiving module is further configured to send the processed data to a higher layer after processing the data according to the configuration of the data radio bearer at the UE when the specific radio bearer is the data radio bearer reserved at the anchor base station of the UE.

53. the apparatus of claim 52, wherein the downlink receiving module is further configured to perform an explicit reset process in a layer two signaling manner after the data transmission is finished.

54. the apparatus of claim 52, wherein the downlink receiving module is further configured to employ a continuous security layer state variable when initiating corresponding traffic on a data radio bearer reserved by an anchor base station of the UE, the state variables of other layers starting from initial values each time.