WO2018149280A1

WO2018149280A1 - Data receiving method and device

Info

Publication number: WO2018149280A1
Application number: PCT/CN2018/074087
Authority: WO
Inventors: 邹伟
Original assignee: 中兴通讯股份有限公司
Priority date: 2017-02-17
Filing date: 2018-01-25
Publication date: 2018-08-23
Also published as: CN108463000B; CN108463000A

Abstract

A data receiving method, comprising: a user equipment in an inactive state acquires downlink control information of downlink data from a downlink control channel by means of a wireless network temporary identifier; the user equipment receives, according to the downlink control information, a data packet sent by a base station over a downlink shared channel, wherein the user equipment keeps the inactive state after receiving the data packet. Also disclosed is a data receiving device.

Description

Data receiving method and device

Technical field

The present disclosure relates to a wireless communication technology, for example, to a data reception method and apparatus in a Long-Term Evolution (LTE) system.

Background technique

In the Third Generation Partnership Project (the 3rd Generation Partnership Project, 3GPP ) working on the fifth generation of mobile communications technology (5 ^th Generation, 5G) control plane delay made high demands to the user equipment (User Equipment , UE) can enter the connected state within 10ms time range and start to send data. However, in the LTE system, switching from the idle state to the connected state requires a process of initial random access, connection establishment, registration authentication, etc., which makes it difficult for the UE to switch from the idle state to the connected state within 10 ms.

To overcome this problem, 3GPP introduced a new UE state, inactive state. When the UE enters the inactive state from the connected state, the anchor eNB and the core network that the user initially connects will maintain all the connection configurations of the user and process the uplink, so that the user only needs to pass the random access on the air interface. A similar simple process completes the air interface configuration and can directly enter the connected state.

At the same time, in order to save power, the UE does not configure the Physical Uplink Control Channel (PUCCH) and the sounding resources in the inactive state, and adopts a measurement and cell selection strategy similar to the idle state. Therefore, the inactive user may lose the uplink synchronization during the macro cell movement, that is, the Timing advance used for the uplink transmission may not be used again due to the movement, and must be re-executed by random access or the like. Time advance measurement.

In addition to a large amount of data transmission in a short time, many applications also have a background business flow. The background type service flow generally has a relatively low frequency of transmitting data packets, and the data packets are relatively small. For these background services, if the UE in the inactive state can support direct data transmission, that is, a small amount of data transmission can be performed without transferring to the connection state, the signaling overhead and power consumption of the UE can be saved. Therefore, how to support direct data transmission of inactive users in LTE systems is a problem worth studying.

Summary of the invention

A data receiving method includes:

The user equipment in the inactive state uses the wireless network temporary identifier to obtain downlink control information of the downlink data from the downlink control channel;

And the user equipment receives, according to the downlink control information, a data packet sent by the base station in a downlink shared channel, where the user equipment remains in the inactive state after receiving the data packet.

In an embodiment, the downlink control information carries user state information of the user equipment.

In an embodiment, the user status information includes at least one of the following:

Whether the user equipment is in an inactive state; and

Whether the user equipment is in a connected state.

In an embodiment, the wireless network temporary identifier is dedicated to a single user equipment that is in an inactive state.

In an embodiment, the wireless network temporary identifier is at least one of the following:

a temporary identifier of a cell wireless network used by the user equipment in a connected state for the previous time;

All or part of the inactive state user identity of the user equipment.

In an embodiment, the inactive state user identity is allocated by the base station and sent to the user equipment when the user equipment enters an inactive state.

In an embodiment, the inactive state user identity includes information of an anchor base station and information of the user equipment, wherein the anchor base station is a base station that stores a user context.

In an embodiment, the information of the user equipment includes at least one of the following:

The identity identifier stored in the user equipment, the user equipment identifier assigned by the mobility management function entity, and the temporary identifier of the cell wireless network used by the user equipment in the previous connection state.

In an embodiment, the method further includes:

The user equipment monitors the downlink control channel by using the wireless network temporary identifier within a preset time range.

In an embodiment, the user equipment performs periodic sleep in the preset time range, and listens to the downlink control channel in at least one transmission time interval after the user equipment wakes up.

In an embodiment, before the user equipment enters the inactive state, the anchor base station negotiates the sleep and wake time by signaling, where the anchor base station is a base station that saves the user context.

A data receiving device is applied to user equipment, including:

The downlink control information acquiring unit is configured to: when the user equipment is in an inactive state, use the wireless network temporary identifier to obtain downlink control information of the downlink data from the downlink control channel;

And a data receiving unit, configured to receive, according to the downlink control information, a data packet sent by the base station in the downlink shared channel, where the user equipment remains in the inactive state after receiving the data packet.

Whether the user equipment is in an inactive state; and

Whether the user equipment is in a connected state.

All or part of the inactive state user identity of the user equipment.

In an embodiment, the device further includes:

The notification obtaining unit is configured to receive the inactive state user identity assigned by the base station when the user equipment enters an inactive state.

In an embodiment, the device further includes:

The monitoring unit is configured to monitor the downlink control channel by using the wireless network temporary identifier within a preset time range when the user equipment is in an inactive state.

In an embodiment, the device further includes:

a control unit, configured to control the user equipment in the inactive state to perform periodic sleep within the preset time range;

The listening unit is configured to listen to the downlink control channel at least one transmission time interval after the user equipment wakes up.

In an embodiment, the device further includes:

The negotiating unit is configured to negotiate the sleep and wake time by the anchor base station before the user equipment enters the inactive state, where the anchor base station is a base station that saves the user context.

A computer readable storage medium storing computer executable instructions arranged to perform the method of any of the above.

DRAWINGS

1 is a schematic flow chart of a data receiving method according to an embodiment;

2 is a schematic diagram of a process in which an inactive UE performs uplink data transmission and receives a downlink ACK or data using a dedicated RNTI value in an embodiment;

3 is an illustration of a dedicated new DCI format including user status information in an embodiment;

4 is a schematic flowchart of performing uplink data retransmission by a UE in an inactive state in an embodiment;

5 is a flow chart of signaling interaction of a UE in a connected state entering an inactive state in an embodiment;

Fig. 6 is a block diagram showing the structure of a data receiving apparatus in an embodiment.

detailed description

The technical solutions in the embodiments are explained below in conjunction with the accompanying drawings, and the accompanying drawings are for reference only.

In the discussion of the 3GPP, the uplink direct data transmission may use unlicensed transmission, that is, the base station directly allocates a part of the wireless resources to specifically send the uplink small data, and the part of the wireless resources may be allocated to one UE, or may be allocated to multiple The UE shares and multiple UEs perform uplink data transmission. Downlink direct data transmission may employ a mode in which small data is carried in a paging message. The small data may be a data packet transmitted during one transmission, and the small data may be regarded as a data packet of 50 bytes or less, or may be a data packet of 200 to 300 bytes or less.

In some cases, for unlicensed uplink direct data transmission, the base station needs to return an Acknowledgement (ACK) message to inform the user that the uplink data has been successfully received. In addition, corresponding to some applications, the receiving end may return some data packets immediately after receiving the uplink data of the UE. Therefore, downlink direct data transmission in an inactive state caused by uplink data transmission is very common. In this case, since the base station has received the uplink data packet before the downlink data transmission, the base station knows that the UE is within its coverage. In this case, some methods can be used to send downlink data. The following embodiments discuss downlink direct data transmission caused by uplink data transmission in an inactive state.

FIG. 1 is a schematic flowchart of a data receiving method in an embodiment. As shown in FIG. 1, the method includes the following steps.

In step 101, the UE in the inactive state obtains downlink control information (Downlink Control Information, DCI) of the downlink data from the downlink control channel (Physical Downlink Control Channel, PDCCH) using the Radio Network Temporary Identity (RNTI). .

In an embodiment, the downlink control information carries user state information of the UE.

In an embodiment, the downlink control information carries user status information of the UE, including at least one of the following:

The downlink control information carries information about whether the UE is in an inactive state;

The downlink control information carries information about whether the UE is in a connected state.

In an embodiment, the RNTI is dedicated to a single UE in an inactive state.

In an embodiment, the RNTI is at least one of the following:

The RNTI is a Cell-Radio Network Temporary Identity (C-RNTI) used by the UE in the connected state for the previous time;

The RNTI is all or part of the inactive state user identity of the UE.

In an embodiment, the inactive state user identity is allocated by the base station and sent to the UE when the UE enters an inactive state.

In an embodiment, the inactive state user identity includes information of an anchor base station and the information of the UE, wherein the anchor base station is a base station that saves a user context.

In an embodiment, the information of the UE includes at least one of the following:

The identity identifier stored in the UE, the UE identity assigned by the Mobility Management Entity (MME), and the C-RNTI used by the UE in the previous connection state.

In an embodiment, the UE in the inactive state uses the RNTI to listen to the downlink control channel within a preset time range.

In an embodiment, the UE in the inactive state performs periodic sleep, and at least one Transmission Time Interval (TTI) listens to the downlink after the user equipment wakes up. Control channel.

In an embodiment, before the UE enters the inactive state, the anchor base station negotiates the sleep and wake time by signaling, where the anchor base station is a base station that saves the user context.

In step 102, the UE in the inactive state receives, according to the downlink control information, a data packet sent by the base station in a Physical Downlink Shared Channel (PDSCH), where the UE after receiving the data packet Stay in the inactive state.

In the technical solution in the foregoing embodiment, the UE in the inactive state can obtain the DCI of the downlink data directly from the PDCCH by using the specific RNTI, and the UE receives the data packet sent by the base station in the PDSCH according to the downlink control information, and remains in the inactive state. When the UE in the inactive state implements downlink data reception, it does not need to frequently switch between the connected state and the inactive state, which saves signaling overhead. Accordingly, the power consumption of the UE in the inactive state is also reduced.

2 is a schematic flow chart of a method for performing uplink data transmission and receiving downlink ACK or data using a dedicated RNTI value in an inactive state UE in an embodiment. As shown in FIG. 2, the method includes the following steps.

In step 201, the UE that enters the inactive state listens to the unlicensed transmission information sent by the base station.

The unlicensed transmission information may include one or more of the following: radio resource location information that is not authorized to be sent, adjustment code selection information that is not authorized to be sent, uplink power control information that is not authorized to be sent, and downlink response that is not authorized to be sent. RNTI value information, retransmission waiting time for unauthorized transmission, and subsequent PDCCH listening time for unauthorized transmission.

In an embodiment, the unlicensed transmission information may be transmitted over a broadcast channel. For example, the unlicensed transmission information may be transmitted through a UE-specific broadcast channel in an inactive state. In addition, the unlicensed transmission information may also be sent to the UE through dedicated Radio Resource Control (RRC) signaling before the UE enters the inactive state.

In step 202, the UE sends the uplink data by using the unlicensed resource according to the unlicensed sending information.

In step 203, the base station transmits a new DCI using the RNTI value of the UE.

In an embodiment, the new DCI may further include information about a user status. For example: The new DCI includes information about whether the user is inactive. For example, the new DCI includes information on whether the user is connected.

In an embodiment, the RNTI may be UE-specific for a single inactive state.

In an embodiment, the RNTI may be a C-RNTI value used by the UE in the previous connection state.

In an embodiment, the RNTI may be all or part of an inactive state user identity.

The inactive state user identity may be allocated and transmitted by the base station when the user enters an inactive state.

The inactive state user identity may include information of an anchor base station (ie, a base station that holds a user context) and information of the UE itself.

The information of the UE itself may include one or more of the following: an identity identifier saved in the UE, a UE identifier allocated by the MME, and a C-RNTI used by the UE in the last connected state.

In step 204, the user receives at least one of the ACK information and the subsequent data of the base station according to the DCI, and still remains in an inactive state.

3 is an example of a dedicated new DCI format including user state information in an embodiment. As shown in FIG. 3, 1 bit is used in the format information to indicate state information of the UE. For example, the bit "0" is used to indicate the connected state, and the bit "1" is the inactive state.

FIG. 4 is a schematic flowchart of a method for performing uplink data retransmission by a UE in an inactive state according to an embodiment. As shown in FIG. 4, the method includes the following steps.

In step 401, the UE entering the inactive state listens to the unlicensed transmission information sent by the base station.

In an embodiment, the unlicensed transmission information may be transmitted over a broadcast channel. For example, the unlicensed transmission information may be transmitted through a UE-specific broadcast channel in an inactive state. In addition, the unlicensed transmission information may also be notified to the UE through dedicated RRC signaling before the UE enters the inactive state.

In step 402, the UE sends the uplink data by using the unlicensed resource according to the unlicensed transmission information.

In step 403, the UE does not receive at least one of the ACK and the subsequent data of the base station within a certain time range, and the UE retransmits the uplink data by using the unlicensed resource according to the unlicensed transmission information.

The time range in step 403 may be a retransmission waiting time for unauthorized transmission or a subsequent PDCCH listening time for unauthorized transmission.

FIG. 5 is a flowchart of signaling interaction of a UE in a connected state entering an inactive state according to an embodiment. As shown in FIG. 5, the signaling interaction process is as follows.

In step 501, the base station sends an "inactive state configuration command" message to the UE entering the connected state.

In an embodiment, the “inactive state configuration command” message may be a new RRC signaling message or included in an existing RRC signaling message.

In an embodiment, the "inactive state configuration command" message may include a sleep and wake time configuration of the UE in an inactive state.

In an embodiment, the "inactive state configuration command" message may include cell selection and reselection information of the UE in an inactive state.

In step 502, the UE sends an "inactive state configuration confirmation" message to the base station, confirms that the UE will immediately enter the inactive state, and performs related actions according to the information in the configuration command message.

FIG. 6 is a schematic structural diagram of a data receiving apparatus according to an embodiment. As shown in FIG. 6, the apparatus includes: a downlink control information acquiring unit 61 and a data receiving unit 62.

The downlink control information acquiring unit 61 is configured to acquire downlink control information of downlink data from the downlink control channel by using the RNTI when the UE is in an inactive state.

The data receiving unit 62 is configured to receive, according to the downlink control information, a data packet sent by the base station in the downlink shared channel, wherein the UE remains in the inactive state after receiving the data packet.

In an embodiment, the RNTI is dedicated to a single UE in an inactive state.

In an embodiment, the RNTI is at least one of the following:

The RNTI is a C-RNTI used by the UE in the connected state for the previous time;

The RNTI is all or part of the inactive state user identity of the UE.

In an embodiment, the apparatus further includes: a notification acquisition unit 63.

The notification obtaining unit 63 is configured to receive the inactive state user identity notified by the base station when the UE enters an inactive state.

In an embodiment, the inactive state user identity includes information of an anchor base station and information of the UE, wherein the anchor base station is a base station that saves a user context.

The identity identifier stored in the UE, the UE identifier allocated by the MME, and the C-RNTI used by the UE in the previous connection state.

In an embodiment, the apparatus further includes: a listening unit 64.

The monitoring unit 64 is configured to use the RNTI to monitor the downlink control channel within a preset time range when the UE is in an inactive state.

In an embodiment, the apparatus further includes: a control unit 65.

The control unit 65 is configured to control the UE in the inactive state to perform periodic sleep within the preset time range.

The listening unit 64 is configured to monitor the downlink control channel at at least one transmission time interval TTI after the user equipment wakes up.

In an embodiment, the apparatus further includes: a negotiating unit 66.

The negotiating unit 66 is arranged to negotiate the sleep and wake time by the anchor base station before the UE enters the inactive state.

The implementation functions of the plurality of units in the data receiving apparatus shown in FIG. 6 can be referred to the aforementioned data receiving method.

At least one of the above-described embodiments may also be stored in a computer readable storage medium if implemented in the form of a software functional module and sold or used as a standalone product.

The technical solution of the above embodiments may be embodied in the form of a software product stored in a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or The network device or the like) performs all or part of the method in the above embodiments. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code. .

An embodiment provides a computer readable storage medium storing a computer program for performing any of the above embodiments.

Industrial applicability

The data receiving method and device save signaling overhead and reduce power consumption of the user equipment.

Claims

A data receiving method includes:

The user equipment in the inactive state uses the wireless network temporary identifier to obtain downlink control information of the downlink data from the downlink control channel;

And the user equipment receives, according to the downlink control information, a data packet sent by the base station in a downlink shared channel, where the user equipment remains in the inactive state after receiving the data packet.
The method according to claim 1, wherein the downlink control information carries user state information of the user equipment.
The method of claim 2, wherein the user status information comprises at least one of:

Whether the user equipment is in an inactive state; and

Whether the user equipment is in a connected state.
The method of any of claims 1-3, wherein the wireless network temporary identification is dedicated to a single user device that is in an inactive state.
The method of claim 4, wherein the wireless network temporary identification is at least one of:

a temporary identifier of a cell wireless network used by the user equipment in a connected state for the previous time;

All or part of the inactive state user identity of the user equipment.
The method of claim 5, wherein the inactive state user identity is assigned and notified to the user device by the base station when the user device enters an inactive state.
The method of claim 5, wherein the inactive state user identity comprises information of an anchor base station and information of the user equipment, wherein the anchor base station is a base station that holds a user context.
The method of claim 7, wherein the information of the user equipment comprises at least one of the following:

The identity identifier stored in the user equipment, the user equipment identifier assigned by the mobility management function entity, and the temporary identifier of the cell wireless network used by the user equipment in the previous connection state.
The method of any of claims 1-8, further comprising:

The user equipment monitors the downlink control channel by using the wireless network temporary identifier within a preset time range.
The method according to claim 9, wherein the user equipment performs periodic sleep within the preset time range, and listens to the downlink control channel at at least one transmission time interval after the user equipment wakes up.
The method according to claim 10, wherein the time at which the user equipment enters the inactive state and the anchor base station negotiates the sleep and wakeup by signaling, wherein the anchor base station is a base station that holds a user context.
A data receiving device is applied to user equipment, including:

The downlink control information acquiring unit is configured to: when the user equipment is in an inactive state, use the wireless network temporary identifier to obtain downlink control information of the downlink data from the downlink control channel;

And a data receiving unit, configured to receive, according to the downlink control information, a data packet sent by the base station in the downlink shared channel, where the user equipment remains in the inactive state after receiving the data packet.
The device according to claim 12, wherein the downlink control information carries user status information of the user equipment.
The apparatus of claim 13 wherein said user status information comprises at least one of:

Whether the user equipment is in an inactive state; and

Whether the user equipment is in a connected state.
The apparatus of any of claims 12-14, wherein the wireless network temporary identification is dedicated to a single user device that is in an inactive state.
The apparatus of claim 15, wherein the wireless network temporary identifier is at least one of:

a temporary identifier of a cell wireless network used by the user equipment in a connected state for the previous time;

All or part of the inactive state user identity of the user equipment.
The apparatus of claim 16 further comprising:

The notification obtaining unit is configured to receive the inactive state user identity assigned by the base station when the user equipment enters an inactive state.
The apparatus of claim 16, wherein the inactive state user identity comprises information of an anchor base station and information of the user equipment, wherein the anchor base station is a base station that holds a user context.
The apparatus of claim 18, wherein the information of the user equipment comprises at least one of the following:

The identity identifier stored in the user equipment, the user equipment identifier assigned by the mobility management function entity, and the temporary identifier of the cell wireless network used by the user equipment in the previous connection state.
The apparatus of any one of claims 12-19, further comprising:

The monitoring unit is configured to monitor the downlink control channel by using the wireless network temporary identifier within a preset time range when the user equipment is in an inactive state.
The apparatus of claim 20 further comprising:

a control unit, configured to control the user equipment in the inactive state to perform periodic sleep within the preset time range;

The listening unit is configured to listen to the downlink control channel at least one transmission time interval after the user equipment wakes up.
The apparatus of claim 21 further comprising:

The negotiating unit is configured to negotiate the sleep and wake time by the anchor base station before the user equipment enters the inactive state, where the anchor base station is a base station that saves the user context.
A computer readable storage medium storing computer executable instructions arranged to perform the method of any of claims 1-11.