CN110139365B - Method and device for transmitting data in inactive state and user equipment - Google Patents

Method and device for transmitting data in inactive state and user equipment Download PDF

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Publication number
CN110139365B
CN110139365B CN201810128077.5A CN201810128077A CN110139365B CN 110139365 B CN110139365 B CN 110139365B CN 201810128077 A CN201810128077 A CN 201810128077A CN 110139365 B CN110139365 B CN 110139365B
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data
base station
inactive state
resource
threshold
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CN110139365A (en
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韩传华
邓云
范伟
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Spreadtrum Communications Shanghai Co Ltd
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Spreadtrum Communications Shanghai Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/563—Allocation or scheduling criteria for wireless resources based on priority criteria of the wireless resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a method and a device for transmitting data in an inactive state and user equipment. The method comprises the following steps: after sending a random access preamble to the base station and receiving a random access response returned by the base station, sending MSG3 to the base station; receiving MSG4 sent by a base station after judging that UE can send data in an INACTIVE state, wherein the MSG4 carries resource allocation information, and resources corresponding to the resource allocation information are Grant Free resources or UL Grant resources; and transmitting data to a base station by using the Grant Free resource or the UL Grant resource. The invention can ensure data transmission in an inactive state under the condition of reasonably utilizing resources.

Description

Method and device for transmitting data in inactive state and user equipment
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for transmitting data in an inactive state, and a user equipment.
Background
With the development of wireless communication technology, the 3GPP (3rd Generation Partnership Project) introduced NR (New Radio) technology. In NR, RRC (Radio Resource Control) supports 3 states: RRC _ IDLE, RRC _ INACTIVE, and RRC _ CONNECTED. In the RRC _ INACTIVE state, the UE is still CM-CONNECTED and can move within the RNA (RAN-based Notification Area) configured by the base station without notifying the base station. And the last serving base station maintains the context of the UE and the NG connection (connection of base station to AMF/UPF) associated with the UE. The AMF provides the base station with assistance information to assist the base station in deciding whether the UE can enter RRC _ INACTIVE. When the UE in RRC _ INACTIVE state moves outside the configured RNA, the UE triggers an RNA update procedure.
When the UE wants to send data, one way is that the UE first enters RRC _ CONNECTED state and then performs data transmission. This method is suitable for large data volume. However, if the UE needs to transmit a small amount of data, there are some disadvantages, such as large signaling overhead, in this method.
Currently, how the UE transmits uplink data in the INACTIVE state is a problem under discussion. Several methods have been proposed by some companies for sending upstream data in INACTIVE state.
One approach is for the UE to carry small uplink data in MSG 3. However, the data size of MSG3 (determined by the uplink grant of the base station in the RAR) is very limited, and may not accommodate the pending data. In addition, the base station cannot know in advance how large grant the UE needs, and if the UE always allocates a large grant, resources will be wasted.
Another method is to use the resource of grant free for the UE in advance in the INACTIVE state (i.e. the uplink transmission resource does not need to be allocated by downlink control signaling), and the resource is pre-allocated in the CONNECTED state. But since the UE may move and the UE may not know its uplink advance ta (timing advance) while in idle state, the previously allocated resources may not be available.
Disclosure of Invention
The method, the device and the user equipment for transmitting data in the inactive state can ensure data transmission in the inactive state under the condition of reasonably utilizing resources.
In a first aspect, the present invention provides a method for transmitting data in an inactive state, including:
after sending a random access preamble to the base station and receiving a random access response returned by the base station, sending MSG3 to the base station;
receiving MSG4 sent by a base station after judging that UE can send data in an INACTIVE state, wherein the MSG4 carries resource allocation information, and resources corresponding to the resource allocation information are Grant Free resources or UL Grant resources;
and transmitting data to a base station by using the Grant Free resource or the UL Grant resource.
Optionally, the MSG3 carries an INACTIVE data transmission flag, and the base station determines that the UE can send data in an INACTIVE state according to the INACTIVE data transmission flag.
Optionally, the MSG3 carries a data volume to be transmitted, and when the data volume to be transmitted is smaller than a preset threshold, the base station determines that the UE can send data in the INACTIVE state; or, the MSG3 also carries a DRB ID for triggering data transmission, and when the QoS of the DRB for triggering transmission has a very low delay value or a high priority, the base station determines that the UE can send data in the INACTIVE state.
Optionally, the MSG4 also carries an indication that the UE is still in INACTIVE state.
Optionally, before the sending the MSG3 to the base station, the method further comprises:
receiving a data volume threshold, a time delay requirement threshold or a data priority threshold configured by a base station;
and judging whether to transmit data in the INACTIVE state or not according to the data volume threshold, the time delay requirement value threshold or the data priority threshold.
Optionally, the determining whether to send data in the INACTIVE state according to the data amount threshold, the delay requirement threshold, or the data priority threshold includes:
when the data volume to be sent is smaller than the data volume threshold, judging that the data is sent in the INACTIVE state; or,
when the time delay value of the data to be transmitted is lower than the time delay requirement value threshold, judging that the data is transmitted in the INACTIVE state; or,
and when the priority of the data to be transmitted is higher than the data priority threshold, judging that the data is transmitted in the INACTIVE state.
Optionally, the resource size corresponding to the resource allocation information carried in the MSG4 is allocated to the base station according to the implicit data size.
Optionally, the MSG3 also carries a BSR; and the resource size corresponding to the resource allocation information carried in the MSG4 is allocated to the base station according to the BSR.
Optionally, the MSG4 is RRC release signaling or RRC recovery rejection signaling.
Optionally, when the resource corresponding to the resource allocation information is a Grant Free resource, the sending data to the base station using the Grant Free resource includes: and transmitting data to the base station by using the Grant Free resource within a preset time period, wherein the preset time period is configured in the MSG4 by the base station or is a period of time when the uplink timing advance timer is not overtime.
Optionally, the method further comprises: after completing data transmission using the Grant Free resource, the Grant Free resource is released.
In a second aspect, the present invention provides an apparatus for transmitting data in an inactive state, comprising:
a first sending unit, configured to send a random access preamble to the base station and receive a random access response returned by the base station, and then send MSG3 to the base station;
a first receiving unit, configured to receive MSG4 sent by a base station after determining that a UE can send data in an INACTIVE state, where MSG4 carries resource allocation information, and a resource corresponding to the resource allocation information is a Grant Free resource or an UL Grant resource;
and a second transmitting unit, configured to transmit data to the base station using the Grant Free resource or the UL Grant resource.
Optionally, the MSG3 carries an INACTIVE data transmission flag, and the base station determines that the UE can send data in an INACTIVE state according to the INACTIVE data transmission flag.
Optionally, the MSG3 carries a data volume to be transmitted, and when the data volume to be transmitted is smaller than a preset threshold, the base station determines that the UE can transmit data in an INACTIVE state; or, the MSG3 also carries a DRB ID for triggering data transmission, and when the QoS of the DRB for triggering transmission has a very low delay value or a high priority, the base station determines that the UE can send data in the INACTIVE state.
Optionally, the MSG4 also carries an indication that the UE is still in INACTIVE state.
Optionally, the apparatus further comprises:
a second receiving unit, configured to receive a data amount threshold, a delay requirement threshold, or a data priority threshold configured by a base station before the first sending unit sends the MSG3 to the base station;
and the judging unit is used for judging whether to transmit data in the INACTIVE state according to the data quantity threshold, the time delay requirement value threshold or the data priority threshold.
Optionally, the determining unit is configured to determine to send data in an INACTIVE state when the data amount to be sent is smaller than the data amount threshold; or, when the time delay value of the data to be transmitted is lower than the time delay requirement value threshold, judging that the data is transmitted in the INACTIVE state; or, when the priority of the data to be sent is higher than the data priority threshold, judging that the data is sent in the INACTIVE state.
Optionally, the resource size corresponding to the resource allocation information carried in the MSG4 is allocated by the base station according to an implicit data size.
Optionally, the MSG3 also carries a BSR; and the resource size corresponding to the resource allocation information carried in the MSG4 is allocated to the base station according to the BSR.
Optionally, the MSG4 is RRC release signaling or RRC recovery rejection signaling.
Optionally, when the resource corresponding to the resource allocation information is a Grant Free resource, the second sending unit is configured to send data to the base station using the Grant Free resource within a predetermined time period, where the predetermined time period is configured in MSG4 by the base station or is a time period when the uplink timing advance timer is not overtime.
Optionally, the apparatus further comprises:
and the releasing unit is used for releasing the Grant Free resource after the second sending unit completes data transmission by using the Grant Free resource.
In a third aspect, the present invention provides a user equipment, where the user equipment includes the above apparatus for transmitting data in an inactive state.
According to the method, the device and the user equipment for transmitting data in the non-activated state provided by the embodiment of the invention, the UE sends the MSG3 to the base station, when the base station judges that the UE can send the data in the INACTIVE state, the MSG4 is sent to the UE, the MSG4 carries resource allocation information, resources corresponding to the resource allocation information are Grant Free resources or UL Grant resources, and the UE uses the Grant Free resources or the UL Grant resources to send the data to the base station, so that the data transmission in the non-activated state can be ensured under the condition of reasonably utilizing the resources.
Drawings
FIG. 1 is a flow chart of a method for transmitting data in an inactive state according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for transmitting data in an inactive state according to another embodiment of the present invention;
FIG. 3 is a flowchart of a method for transmitting data in an inactive state according to another embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an apparatus for transmitting data in an inactive state according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an apparatus for transmitting data in an inactive state according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a method for transmitting data in an inactive state, as shown in fig. 1, where the method includes:
s11, after sending the random access Preamble (i.e. Preamble) to the base station and receiving the random access response returned from the base station, the UE sends MSG3 to the base station.
The UE is in the inactive state before the step of S11.
S12, the UE receives MSG4 sent by the base station after judging that the UE can send data in the INACTIVE state, the MSG4 carries resource allocation information, and the resource corresponding to the resource allocation information is a Grant Free resource or a UL Grant resource.
Wherein the MSG4 may be RRC release signaling or RRC recovery rejection signaling.
And S13, the UE sends data to the base station by using the Grant Free resource or the UL Grant resource.
According to the method for transmitting data in the non-activated state provided by the embodiment of the invention, the UE sends MSG3 to the base station, after the base station judges that the UE can send data in the INACTIVE state, the base station sends MSG4 to the UE, the MSG4 carries resource allocation information, the resource corresponding to the resource allocation information is a Grant Free resource or a UL Grant resource (uplink Grant resource), and the UE uses the Grant Free resource or the UL Grant resource to send data to the base station, so that the data transmission in the non-activated state can be ensured under the condition of reasonably utilizing the resource.
The method for transmitting data in the inactive state according to the present invention is described in detail with reference to the specific embodiments.
Example 1
The present embodiment provides a method for transmitting data in an inactive state, as shown in fig. 2, the method includes:
s21, the UE performs random access in RRC _ INACTIVE state and sends a random access preamble to the base station (gNB).
S22, after receiving the random access preamble sent by the UE, the base station sends a random access response to the UE.
S23, the UE sends MSG3(RRC message) to the base station according to the resource allocation information in the random access response, wherein the MSG3 carries an INACTIVE data transmission flag for indicating that the purpose of the current request is to perform data transmission in an INACTIVE state.
In addition to the flag indicating data transmission at INACTIVE, the UE may include a BSR (Buffer Status Report) in MSG3 to let the base station know the size of data to be transmitted by the UE. Sometimes, because the number of bits of the BSR is large, the MSG3 may not include the BSR, and the base station allocates resources to the UE according to an implicit data size.
The base station may set some parameters for the UE in advance, so that the UE can determine whether to transmit data at INACTIVE. The base station may configure these parameters when previously triggering the UE to enter the inactive state, the parameters including: a data amount threshold, and when the data amount is greater than or equal to the threshold, the data transmission is considered to be carried out in a connection state; otherwise, data transfer may be enabled in the INACTIVE state. The parameters may also include: when the delay value of the transmitted data is lower than the threshold, that is, the data is transmitted as soon as possible, and the amount of the data to be transmitted is less than a certain value, the UE considers that the data can be transmitted in the INACTIVE state; otherwise, data transmission is carried out in the connection state. The parameters may also include: a data priority threshold, wherein when the priority of the transmitted data is higher than the threshold, the UE considers that the data is to be transmitted preferentially, and the data volume to be transmitted is less than a certain value and can be transmitted in an INACTIVE state; otherwise, data transmission is carried out in the connection state.
S24, after receiving the MSG3 sent by the UE, the base station can know that the UE does not need to enter the CONNECTED state but transmits data in the INACTIVE state according to the INACTIVE data transmission flag carried in the MSG3, and then sends the MSG4 to the UE to allocate resources to the UE.
The base station can allocate resource of Grant Free to the UE and can also allocate normal UL Grant resource. The base station may decide to allocate the size of the resource with reference to the BSR of the UE, or allocate the resource by an implicit data amount. The base station carries the resource allocation information in MSG4 and indicates that the UE is still in INACTIVE state, i.e. maintains INACTIVE state.
In addition, the base station may also ignore the flag that the UE sends data at INACTIVE, and at this time, the base station performs a connection recovery procedure through the MSG4, and performs data transmission after connection recovery. The base station can take corresponding measures according to the scheduling decision of the base station.
S25, after receiving the MSG4 transmitted from the base station, the UE transmits data using the resource allocated by the base station in MSG 4.
And if the resource is the Grant Free resource, the UE sends data to the base station by using the Grant Free resource within a preset time period, wherein the preset time period is configured in the MSG4 by the base station or is a time period when the uplink timing advance timer is not overtime. If it is a normal UL Grant resource, it is used once at a designated time according to the allocation information.
Further, the UE releases the Grant Free resource after completing data transmission using the Grant Free resource. At this time, a period of time set by the base station may not be reached, and releasing the resources in advance may enable the resources to be used by other UEs, thereby reducing collisions.
The UE can still request to resume the connection through MSG3 of the random access procedure, and enter CONNECTED data transmission, such as a scenario where a large amount of data is to be transmitted later.
Example 2
The present embodiment provides a method for transmitting data in an inactive state, as shown in fig. 3, the method includes:
s31, the UE performs random access in RRC _ INACTIVE state and sends a random access preamble to the base station (gNB).
S32, after receiving the random access preamble sent by the UE, the base station sends a random access response to the UE.
S33, the UE sends MSG3(RRC message) to the base station, wherein the MSG3 carries some auxiliary information.
The auxiliary information may include a Data amount to be transmitted, and may further include a DRB ID (Data Radio Bearer Identity) for triggering Data transmission.
S34, after receiving the MSG3 sent by the UE, the base station judges whether to transmit data in INACTIVE according to the auxiliary information carried in the MSG3, and after judging that the UE can transmit data in INACTIVE, the base station sends the MSG4 to the UE to allocate resources to the UE.
Specifically, when the base station judges that the data volume to be transmitted is less than a threshold, the base station transmits data at INACTIVE; or, when the base station determines that the QoS (Quality of Service) of the DRB triggering transmission has a very low delay value or a high priority (at this time, the total data amount is still required to be lower than a threshold), the data is transmitted at INACTIVE.
When the base station determines to send data under INACTIVE according to the above-mentioned manner, resources are allocated to the UE in MSG 4. The base station can allocate Grant Free resources to the UE and can also allocate normal UL Grant resources. The base station may decide the size of the allocated resource with reference to the BSR of the UE. The base station carries the resource allocation information in MSG4 and indicates that the UE is still in INACTIVE state. In addition, the base station may also ignore the information carried by the UE in the MSG3, and at this time, the base station performs a connection recovery procedure through the MSG4, and performs data transmission after the connection recovery.
S35, after receiving the MSG4 transmitted from the base station, the UE transmits data using the resource allocated by the base station in MSG 4.
And if the resource is the Grant Free resource, the UE sends data to the base station by using the Grant Free resource within a preset time period, wherein the preset time period is configured in the MSG4 by the base station or is a time period when the uplink timing advance timer is not overtime. If it is a normal UL Grant resource, it is used once at a designated time according to the allocation information.
Further, the UE releases the Grant Free resource after completing the data transmission using the Grant Free resource.
An embodiment of the present invention further provides a device for transmitting data in an inactive state, as shown in fig. 4, the device includes:
a first sending unit 11, configured to send an MSG3 to the base station after sending a random access preamble to the base station and receiving a random access response returned by the base station;
a first receiving unit 12, configured to receive MSG4 sent by a base station after determining that a UE can send data in an INACTIVE state, where the MSG4 carries resource allocation information, and a resource corresponding to the resource allocation information is a Grant Free resource or an UL Grant resource;
and a second transmitting unit 13, configured to transmit data to the base station using the Grant Free resource or the UL Grant resource.
According to the device for transmitting data in the INACTIVE state, the UE sends the MSG3 to the base station, after the base station judges that the UE can send data in the INACTIVE state, the MSG4 is sent to the UE, the MSG4 carries resource allocation information, the resource corresponding to the resource allocation information is a Grant Free resource or a UL Grant resource, and the UE uses the Grant Free resource or the UL Grant resource to send data to the base station, so that data transmission in the INACTIVE state can be guaranteed under the condition that the resource is reasonably utilized.
Optionally, the MSG3 carries an INACTIVE data transmission flag, and the base station determines that the UE can send data in an INACTIVE state according to the INACTIVE data transmission flag.
Optionally, the MSG3 carries a data volume to be transmitted, and when the data volume to be transmitted is smaller than a preset threshold, the base station determines that the UE can transmit data in an INACTIVE state; or, the MSG3 also carries a DRB ID for triggering data transmission, and when the QoS of the DRB for triggering transmission has a very low delay value or a high priority, the base station determines that the UE can send data in the INACTIVE state.
Optionally, the MSG4 also carries an indication that the UE is still in INACTIVE state.
Optionally, as shown in fig. 5, the apparatus further includes:
a second receiving unit 14, configured to receive a data amount threshold, a delay requirement threshold, or a data priority threshold configured by a base station before the first sending unit 11 sends the MSG3 to the base station;
and the judging unit 15 is configured to judge whether to send data in the INACTIVE state according to the data amount threshold, the delay requirement threshold, or the data priority threshold.
Optionally, the determining unit 15 is configured to determine to send data in an INACTIVE state when the data amount to be sent is smaller than the data amount threshold; or, when the delay value of the data to be transmitted is lower than the delay requirement value threshold, judging that the data is transmitted in the INACTIVE state; or, when the priority of the data to be transmitted is higher than the data priority threshold, judging that the data is transmitted in the INACTIVE state.
Optionally, the resource size corresponding to the resource allocation information carried in the MSG4 is allocated to the base station according to the implicit data size.
Optionally, the MSG3 also carries a BSR; and the resource size corresponding to the resource allocation information carried in the MSG4 is allocated to the base station according to the BSR.
Optionally, the MSG4 is RRC release signaling or RRC recovery rejection signaling.
Optionally, when the resource corresponding to the resource allocation information is a Grant Free resource, the second sending unit 13 is configured to send data to the base station by using the Grant Free resource within a predetermined time period, where the predetermined time period is configured in the MSG4 by the base station, or is a time period when the uplink timing advance timer is not overtime.
Optionally, as shown in fig. 5, the apparatus further includes:
a releasing unit 16, configured to release the Grant Free resource after the second sending unit 13 completes data transmission using the Grant Free resource.
The apparatus of this embodiment may be configured to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
The embodiment of the invention also provides the user equipment which comprises the device for transmitting the data in the non-activated state.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (21)

1. A method for transmitting data in an inactive state, comprising:
after sending a random access preamble to the base station and receiving a random access response returned by the base station, sending MSG3 to the base station;
receiving MSG4 sent by a base station after judging that UE can send data in an INACTIVE state, wherein the MSG4 carries resource allocation information, resources corresponding to the resource allocation information are Grant Free resources or UL Grant resources, and the MSG4 is RRC release signaling or RRC recovery rejection signaling;
and transmitting data to a base station by using the Grant Free resource or the UL Grant resource.
2. The method of claim 1, wherein the MSG3 carries an INACTIVE data transmission flag, and the base station determines that the UE can send data in an INACTIVE state according to the INACTIVE data transmission flag.
3. The method according to claim 1, wherein the MSG3 carries a data volume to be transmitted, and when the data volume to be transmitted is smaller than a preset threshold, the base station determines that the UE can transmit data in an INACTIVE state; or, the MSG3 also carries a DRB ID for triggering data transmission, and when the QoS of the DRB for triggering transmission has a very low delay value or a high priority, the base station determines that the UE can send data in the INACTIVE state.
4. The method according to claim 2 or 3, wherein the MSG4 also carries an indication that the UE is still in INACTIVE state.
5. The method of claim 1, wherein prior to said sending MSG3 to the base station, the method further comprises:
receiving a data quantity threshold, a time delay requirement value threshold or a data priority threshold configured by a base station;
and judging whether to transmit data in the INACTIVE state or not according to the data volume threshold, the time delay requirement value threshold or the data priority threshold.
6. The method of claim 5, wherein determining whether to send data in an INACTIVE state according to the data volume threshold, the delay requirement threshold, or the data priority threshold comprises:
when the data volume to be sent is smaller than the data volume threshold, judging that the data is sent in the INACTIVE state; or,
when the time delay value of the data to be transmitted is lower than the time delay requirement value threshold, judging that the data is transmitted in the INACTIVE state; or,
and when the priority of the data to be sent is higher than the data priority threshold, judging that the data is sent in the INACTIVE state.
7. The method of claim 1, wherein the resource size corresponding to the resource allocation information carried in the MSG4 is allocated by the base station according to an implicit data size.
8. The method of claim 1, wherein the MSG3 also carries BSR; and the resource size corresponding to the resource allocation information carried in the MSG4 is allocated to the base station according to the BSR.
9. The method according to claim 1, wherein when the resource corresponding to the resource allocation information is a Grant Free resource, the transmitting data to the base station using the Grant Free resource comprises: and transmitting data to the base station by using the Grant Free resource within a preset time period, wherein the preset time period is configured in the MSG4 by the base station or is a period of time when the uplink timing advance timer is not overtime.
10. The method according to claim 1 or 9, characterized in that the method further comprises: after completing data transmission using the Grant Free resource, the Grant Free resource is released.
11. An apparatus for transmitting data in an inactive state, comprising:
a first sending unit, configured to send an MSG3 to the base station after sending a random access preamble to the base station and receiving a random access response returned by the base station;
a first receiving unit, configured to receive an MSG4 sent by a base station after determining that a UE can send data in an INACTIVE state, where the MSG4 carries resource allocation information, a resource corresponding to the resource allocation information is a Grant Free resource or an UL Grant resource, and the MSG4 is an RRC release signaling or an RRC recovery rejection signaling;
and a second transmitting unit, configured to transmit data to the base station using the Grant Free resource or the UL Grant resource.
12. The apparatus of claim 11, wherein the MSG3 carries an INACTIVE data transmission flag, and wherein the base station determines that the UE can send data in an INACTIVE state according to the INACTIVE data transmission flag.
13. The apparatus of claim 11, wherein the MSG3 carries a data volume to be transmitted, and when the data volume to be transmitted is smaller than a preset threshold, the base station determines that the UE can send data in an INACTIVE state; or, the MSG3 also carries a DRB ID for triggering data transmission, and when the QoS of the DRB for triggering transmission has a very low delay value or a high priority, the base station determines that the UE can send data in the INACTIVE state.
14. The apparatus of claim 12 or 13, wherein the MSG4 also carries an indication that the UE is still in INACTIVE state.
15. The apparatus of claim 11, further comprising:
a second receiving unit, configured to receive a data amount threshold, a delay requirement threshold, or a data priority threshold configured by a base station before the first sending unit sends the MSG3 to the base station;
and the judging unit is used for judging whether to transmit data in the INACTIVE state according to the data quantity threshold, the time delay requirement value threshold or the data priority threshold.
16. The apparatus of claim 15, wherein the determining unit is configured to determine to send data in an INACTIVE state when an amount of data to be sent is smaller than the data amount threshold; or, when the delay value of the data to be transmitted is lower than the delay requirement value threshold, judging that the data is transmitted in the INACTIVE state; or, when the priority of the data to be sent is higher than the data priority threshold, judging that the data is sent in the INACTIVE state.
17. The apparatus of claim 11, wherein the resource size corresponding to the resource allocation information carried in the MSG4 is allocated by the base station according to an implicit data size.
18. The apparatus of claim 11, wherein the MSG3 also carries BSR; and the resource size corresponding to the resource allocation information carried in the MSG4 is allocated to the base station according to the BSR.
19. The apparatus of claim 11, wherein when the resource corresponding to the resource allocation information is a Grant Free resource, the second sending unit is configured to send data to a base station using the Grant Free resource within a predetermined time period, where the predetermined time period is configured in MSG4 by the base station, or is a time period when an uplink timing advance timer has not timed out.
20. The apparatus of claim 11 or 19, further comprising:
and the releasing unit is used for releasing the Grant Free resource after the second sending unit completes data transmission by using the Grant Free resource.
21. A user equipment, characterized in that the user equipment comprises an apparatus for transmitting data in an inactive state according to any of claims 11 to 20.
CN201810128077.5A 2018-02-08 2018-02-08 Method and device for transmitting data in inactive state and user equipment Active CN110139365B (en)

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