CN110267352B - User terminal scheduling method and device - Google Patents
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Abstract
A method and a device for scheduling a user terminal are provided, the method comprises the following steps: receiving a signal in a subframe issued by a base station; acquiring a downlink control signaling corresponding to the user terminal in a first time slot of the subframe; acquiring a time slot indication cell from the downlink control signaling, wherein the time slot indication cell is used for indicating a time slot to which the downlink control signaling is applied; when the downlink control signaling indicates to execute downlink data reception, receiving downlink data in the time slot applying the downlink control signaling and on the resource indicated by the downlink control signaling; and when the downlink control signaling indicates to execute uplink data transmission, transmitting uplink data at the ith time slot after receiving the downlink control signaling. By adopting the method and the device, the time delay of the base station for scheduling the UE can be effectively shortened.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a method and an apparatus for scheduling a user equipment.
Background
In the existing scheme of a Long Term Evolution (LTE) system, a User Equipment (UE) receives signaling and data transmitted by a base station as follows: firstly, a Physical Downlink Control Channel (PDCCH) located in a first symbol to a third symbol of a subframe is received, and a Downlink Control signaling belonging to the PDCCH is detected from the PDCCH. Then, according to a Modulation and Coding Scheme (MCS), Resource Block (RB) Resource allocation information, and the like indicated by the Downlink control signaling, data belonging to the subframe is received in a Physical Downlink Shared Channel (PDSCH) of the subframe. When the receiving is successful, the UE feeds back ACKnowledgement information (ACK) to the base station at least in a fourth subframe after the subframe receiving the data; when the reception fails, a Negative ACKnowledgement (NACK) is fed back to the base station.
In the prior art, a ue receives signaling and data transmitted by a base station in units of one subframe (length is 1ms), that is, in units of 1ms, and a Transmission Time Interval (TTI) is 1 ms. Accordingly, the base station schedules the UE also in units of 1 ms. This scheduling mechanism is adequate for non-real-time traffic, but for some real-time traffic (requiring end-to-end delay within 30 ms), it does not meet the delay requirement.
Disclosure of Invention
The technical problem solved by the invention is how to shorten the time delay of the base station for scheduling the UE.
To solve the foregoing technical problem, an embodiment of the present invention provides a user equipment scheduling method, including:
receiving a signal in a subframe issued by a base station;
acquiring a downlink control signaling corresponding to the user terminal in a first time slot of the subframe;
acquiring a time slot indication cell from the downlink control signaling, wherein the time slot indication cell is used for indicating a time slot to which the downlink control signaling is applied;
when the downlink control signaling indicates to execute downlink data reception, receiving downlink data in the time slot applying the downlink control signaling and on the resource indicated by the downlink control signaling;
and when the downlink control signaling indicates to execute uplink data transmission, transmitting uplink data at the ith time slot after receiving the downlink control signaling.
Optionally, the timeslot indicator cell is a 1-bit cell.
Optionally, when the timeslot indicator cell is valid, the timeslot indicator cell is used to indicate that the timeslot to which the downlink control signaling is applied is the first timeslot of the subframe.
Optionally, the timeslot indicator cell is a multi-bit cell.
Optionally, the timeslot indicator cell is configured to indicate that the timeslot of the downlink control signaling is: the xth slot after the first slot of the subframe, x being the value of the slot indication information element.
Optionally, the method for scheduling a user equipment further includes: and when the time slot indication cell is invalid or the time slot indication cell is not acquired from the downlink control signaling, receiving downlink data at a subframe receiving the downlink control signaling according to the resource indicated by the downlink control signaling, or sending uplink data at an Nth subframe after the subframe receiving the downlink control signaling.
Optionally, when the user terminal is in an FDD system, the value of i is any one of 3, 4, 5, and 6; and when the user terminal is in a TDD mode, i is more than or equal to 3.
The embodiment of the invention provides a user terminal scheduling device, which comprises:
a first receiving unit, configured to receive a signal in a subframe issued by a base station;
a downlink control signaling obtaining unit, configured to obtain, in a first time slot of the subframe, a downlink control signaling corresponding to the ue;
a time slot indication cell obtaining unit, configured to obtain a time slot indication cell from the downlink control signaling, where the time slot indication cell is used to indicate a time slot to which the downlink control signaling is applied;
a second receiving unit, configured to receive downlink data at the time slot to which the downlink control signaling is applied and at the resource indicated by the downlink control signaling when the downlink control signaling indicates to perform downlink data reception;
and a sending unit, configured to send the uplink data at an ith time slot after receiving the downlink control signaling when the downlink control signaling indicates to execute uplink data sending.
Optionally, the timeslot indicator cell is a 1-bit cell, and is configured to indicate that the timeslot to which the downlink control signaling is applied is the first timeslot of the subframe.
Optionally, the slot indication cell is a multi-bit cell for indicating an xth slot after the first slot of the subframe.
Optionally, the second receiving unit is further configured to receive downlink data in a subframe that receives the downlink control signaling according to the resource indicated by the downlink control signaling when the timeslot indication cell is invalid or the timeslot indication cell is not acquired from the downlink control signaling; the sending unit is further configured to send uplink data in an nth subframe after the subframe receiving the downlink control signaling when the timeslot indication cell is invalid or the timeslot indication cell is not obtained from the downlink control signaling.
Optionally, when the user terminal is in an FDD system, the value of i is any one of 3, 4, 5, and 6; and when the user terminal is in a TDD mode, i is more than or equal to 3.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
after receiving the downlink control signaling, obtaining a time slot indication cell from the downlink control signaling to obtain a time slot applying the downlink control signaling, and sending uplink data or receiving downlink data on a corresponding time slot according to a data transmission type executed by the downlink control signaling indication, thereby realizing scheduling of the user terminal in one time slot and shortening the time delay of the base station for scheduling the user terminal.
Drawings
Fig. 1 is a flowchart of a scheduling method of a user equipment in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a user terminal scheduling apparatus in an embodiment of the present invention.
Detailed Description
In the prior art, the signaling and data transmitted by the base station are received by the user terminal in units of one subframe, that is, in units of 1 ms. Accordingly, the base station schedules the UE also in units of 1 ms. In the prior art, the time delay of the base station for scheduling the UE is long.
In the embodiment of the invention, a base station is allowed to schedule a user terminal according to a time slot unit, and one subframe comprises two time slots: a first time slot and a second time slot, each time slot being 0.5ms in duration. The user terminal obtains the downlink control signaling corresponding to the user terminal in the first time slot of the subframe, obtains the time slot indication cell from the downlink control signaling to obtain the time slot applying the downlink control signaling, and sends uplink data or receives downlink data on the corresponding time slot according to the data transmission type executed by the downlink control signaling indication, thereby realizing the scheduling of the user terminal in one time slot and shortening the time delay of the base station for scheduling the user terminal.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
An embodiment of the present invention provides a user terminal scheduling method, which is described in detail below with reference to fig. 1 through specific steps.
Step S101, receiving a signal in a subframe issued by a base station.
Step S102, in the first time slot of the subframe, acquiring the downlink control signaling corresponding to the user terminal.
In practical applications, the radio frame has a time length of 10ms, each radio frame includes 10 subframes, and each subframe has a time length of 1 ms. Each subframe comprises two slots, each slot having a time length of 0.5 ms. The downlink control signaling allocated by the base station for the user terminal is set in the physical resource of the first time slot of the subframe. In general, downlink control signaling corresponding to a ue is set in the first Symbol (Symbol) to the third Symbol of the first slot.
When receiving data sent by a base station, a user terminal receives downlink control signaling transmitted on a PDCCH (physical downlink control channel) from a first symbol to a third symbol of a first time slot of a subframe. The user terminal detects whether a downlink control signaling scrambled by a Cell Radio Network Temporary Identifier (C-RNTI) of the user terminal exists in the PDCCH. When the downlink control signaling scrambled by the C-RNTI of the user exists, the downlink control signaling of the user can be obtained from the PDCCH.
After acquiring the downlink control signaling of the user terminal, the user terminal may execute step S103.
Step S103, obtaining the time slot indication cell from the downlink control signaling.
In the embodiment of the invention, when the base station sends data to the user terminal, a time slot indicating cell can be newly added in the downlink control signaling corresponding to the user terminal, the newly added time slot indicating cell can be one bit or a plurality of bits, and the time slot indicating cell can indicate which time slot the downlink control signaling is applied to.
After acquiring the downlink control signaling, the user terminal can acquire the timeslot indication cell from the downlink control signaling, and further can acquire the timeslot to which the downlink control signaling is applied. When the time slot indication cell is a 1-bit cell, the time slot indication cell can be set to be valid when set to be 1, and the time slot indication cell can be set to be invalid when set to be 0.
When the time slot indication cell is a 1-bit cell, the time slot of the downlink control signaling is applied as the first time slot of the currently received subframe; when the timeslot indicator cell is a multi-bit cell, the value x of the multi-bit timeslot indicator cell can be obtained, at this time, the timeslot to which the downlink control signaling is applied is x timeslots after the first timeslot of the currently received subframe (i.e., the xth timeslot after the downlink control signaling is received), and particularly, when x is 0, the timeslot where the downlink control signaling is received is indicated.
After the time slot indication cell is obtained, the time slot to which the downlink control signaling is applied can be obtained. In practical applications, the downlink control signaling received by the ue may be used for receiving downlink data or sending uplink data. For example, if the downlink control signaling corresponding to the ue is obtained as DCI 1A (i.e., the DCI format is 1A), the downlink control signaling is used for receiving downlink data. If the downlink control signaling corresponding to the ue is obtained as DCI 0 (i.e., DCI format is 0), the downlink control signaling is used for uplink data transmission.
Therefore, after acquiring the downlink control signaling and the timeslot to which the downlink control signaling applies, step S104 may be executed to know whether the downlink control signaling is used for uplink data transmission or downlink data reception. If the timeslot indicator cell is not detected in this step, it indicates that the downlink control signaling is applied to a subframe, and the ue performs data reception or transmission using the existing mechanism.
Step S104, judging whether the downlink control signaling indicates to execute downlink data reception. When the downlink control signaling indicates to perform downlink data reception, performing step S105; and when the downlink control signaling indicates to perform uplink data transmission, performing step S106.
Step S105, receiving downlink data in the time slot to which the downlink control signaling is applied and in the resource indicated by the downlink control signaling.
In the embodiment of the present invention, when the timeslot indicator cell is a 1-bit cell and is set to be valid, the timeslot indicated by the timeslot indicator cell and to which the downlink control signaling is applied is the timeslot in which the downlink control signaling is received. That is, when the downlink control signaling is received in the first slot of the subframe n, the slot to which the downlink control signaling is applied is the first slot of the subframe n. Therefore, in the first time slot of the subframe, the data transmitted by the base station is received on the resource indicated by the downlink control signaling.
When the timeslot indicator cell is a multi-bit cell, the value x of the multi-bit timeslot indicator cell can be obtained, and at this time, the data transmitted by the base station can be received at the resource indicated by the downlink control signaling in x timeslots after the downlink control signaling is received.
For example, if the multi-bit slot indicates that the data in the cell is 101, the currently received subframe is subframe n, the first slot of the current subframe is 2n, and the second slot is 2n + 1. At this time, if the value of the multi-bit slot indication information element is x ═ 5, then in the 2n +5 th slot (i.e. the 5 th slot after receiving the downlink control signaling), the data transmitted by the base station is received on the resource indicated by the downlink control signaling.
Step S106, sending uplink data in the ith time slot after receiving the downlink control signaling.
In a specific implementation, when the timeslot indicator cell is a 1-bit cell and is set to be valid, or when the timeslot indicator cell is a multi-bit cell, the indicated transmission timeslot is the ith timeslot after the downlink control signaling is received. Therefore, the uplink data can be transmitted in the ith time slot after the downlink control signaling is received.
In the embodiment of the present invention, the value of i may be related to the network type in which the user terminal is currently located. When the network format in which the user terminal is currently located is FDD (frequency division multiplexing), the value of i may be any one of 3, 4, 5, and 6. When the current network mode of the user terminal is TDD (time division duplex), i is more than or equal to 3.
The i value can also be dynamically configured by the base station according to the processing capability of the user terminal and the load and the processing capability of the base station, the base station can configure the i value for the user terminal through the radio resource control signaling, and can also indicate the i value to the user terminal in the downlink control signaling.
In the embodiment of the present invention, there may also be a scenario in which no timeslot indication cell exists in the downlink control signaling. When the slot indication cell is a 1-bit cell, there may also be a scenario where the slot indication cell is set to invalid. When the two scenes occur, the existing mechanism is adopted to transmit the uplink data.
In the prior art, when a timeslot indication cell is invalid or a timeslot indication cell is not obtained from a downlink control signaling, downlink data is received in a subframe for receiving the downlink control signaling according to a resource indicated by the downlink control signaling; or sending the uplink data in the Nth subframe after the subframe receiving the downlink control signaling.
The value of N may be related to the network type in which the user terminal is currently located. When the network format in which the user terminal is currently located is FDD (frequency division multiplexing), N is 4. When the current network mode of the user terminal is TDD (time division duplex), N is more than or equal to 4.
For example, if the subframe receiving the downlink control signaling is subframe M, when the timeslot indication cell is invalid, downlink data is received in subframe M according to the resource indicated by the downlink control signaling; the uplink data is transmitted at the 4 th subframe after the subframe M.
As can be seen from the above, in the prior art, the base station schedules the ue in units of one subframe, so that there is a problem of long time delay for scheduling the ue.
In the embodiment of the invention, after the downlink control signaling is received, the time slot indication cell is obtained from the downlink control signaling to obtain the time slot applying the downlink control signaling, and the uplink data transmission or the downlink data reception is carried out on the corresponding time slot according to the data transmission type executed by the downlink control signaling indication, thereby realizing the scheduling of the user terminal in one time slot and shortening the time delay of the base station for scheduling the user terminal.
Referring to fig. 2, a user terminal scheduling apparatus 20 in the embodiment of the present invention is provided, including: a first receiving unit 201, a downlink control signaling obtaining unit 202, a timeslot indication cell obtaining unit 203, a second receiving unit 204 and a sending unit 205, wherein:
a first receiving unit 201, configured to receive a signal in a subframe issued by a base station;
a downlink control signaling obtaining unit 202, configured to obtain, in a first time slot of the subframe, a downlink control signaling corresponding to the ue;
a time slot indication cell obtaining unit 203, configured to obtain a time slot indication cell from the downlink control signaling, where the time slot indication cell is used to indicate a time slot to which the downlink control signaling is applied;
a second receiving unit 204, configured to receive downlink data at the time slot to which the downlink control signaling is applied and at the resource indicated by the downlink control signaling when the downlink control signaling indicates to perform downlink data reception;
a sending unit 205, configured to send uplink data in the ith time slot after receiving the downlink control signaling when the downlink control signaling indicates to perform uplink data sending.
In a specific implementation, the timeslot indicator cell is a 1-bit cell, and is configured to indicate that a timeslot to which the downlink control signaling is applied is a first timeslot of the subframe.
In a specific implementation, the slot indication cell is a multi-bit cell for indicating an xth slot after a first slot of the subframe.
In a specific implementation, the second receiving unit 204 may be further configured to receive downlink data in a subframe receiving the downlink control signaling according to a resource indicated by the downlink control signaling when the timeslot indication cell is invalid or the timeslot indication cell is not acquired from the downlink control signaling;
the sending unit 205 may be further configured to send uplink data in an nth subframe after a subframe receiving the downlink control signaling when the timeslot indication cell is invalid or the timeslot indication cell is not acquired from the downlink control signaling.
In a specific implementation, when the user terminal is in an FDD mode, the value of i is any one of 3, 4, 5 and 6; and when the user terminal is in a TDD mode, i is more than or equal to 3.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (14)
1. A method for scheduling a user terminal, comprising:
acquiring a downlink control signaling corresponding to the user terminal;
acquiring a time slot indication cell from the downlink control signaling, wherein the time slot indication cell is used for indicating a time slot to which the downlink control signaling is applied;
when the downlink control signaling indicates to execute downlink data reception, receiving downlink data in the time slot applying the downlink control signaling and on the resource indicated by the downlink control signaling;
and when the downlink control signaling indicates to execute uplink data transmission, transmitting uplink data at the ith time slot after receiving the downlink control signaling.
2. The method for scheduling a ue of claim 1, wherein the acquiring the downlink control signaling corresponding to the ue comprises:
receiving a PDCCH issued by a base station; acquiring a corresponding downlink control signaling from the PDCCH according to a cell radio network temporary identifier corresponding to the user terminal; the PDCCH is contained in a time slot in a subframe issued by the base station.
3. The method of claim 2, wherein the slot indication cell is a 1-bit cell.
4. The method of claim 3, wherein when the slot indication cell is valid, the slot indication cell is used to indicate that a slot to which the downlink control signaling is applied is a first slot of the subframe.
5. The method of claim 2, wherein the slot indication cell is a multi-bit cell.
6. The ue scheduling method of claim 5, wherein the timeslot indicator cell indicates the timeslot of the downlink control signaling as: the xth slot after the first slot of the subframe, x being the value of the slot indication information element.
7. The method for scheduling a user terminal of claim 1, further comprising:
and when the time slot indication cell is invalid or the time slot indication cell is not acquired from the downlink control signaling, receiving downlink data in a subframe receiving the downlink control signaling according to the resource indicated by the downlink control signaling, or sending uplink data in an Nth subframe after the subframe receiving the downlink control signaling.
8. The method of claim 1, wherein when the ue is in FDD mode, the value of i is any one of 3, 4, 5, and 6; and when the user terminal is in a TDD mode, i is more than or equal to 3.
9. A user terminal scheduling apparatus, comprising:
a downlink control signaling obtaining unit, configured to obtain a downlink control signaling corresponding to the user equipment;
a time slot indication cell obtaining unit, configured to obtain a time slot indication cell from the downlink control signaling, where the time slot indication cell is used to indicate a time slot to which the downlink control signaling is applied;
a second receiving unit, configured to receive downlink data at the time slot to which the downlink control signaling is applied and at the resource indicated by the downlink control signaling when the downlink control signaling indicates to perform downlink data reception;
and a sending unit, configured to send the uplink data at an ith time slot after receiving the downlink control signaling when the downlink control signaling indicates to execute uplink data sending.
10. The apparatus for scheduling a user equipment according to claim 9, wherein the downlink control signaling obtaining unit is configured to receive a PDCCH sent by a base station; acquiring a corresponding downlink control signaling from the PDCCH according to a cell radio network temporary identifier corresponding to the user terminal; the PDCCH is contained in a time slot in a subframe issued by the base station.
11. The apparatus as claimed in claim 10, wherein the slot indication information element is a 1-bit information element for indicating that the slot to which the downlink control signaling is applied is the first slot of the subframe.
12. The apparatus of claim 10, wherein the slot indication cell is a multi-bit cell indicating an xth slot after the first slot of the subframe.
13. The apparatus as claimed in claim 9, wherein the second receiving unit is further configured to receive downlink data according to the resource indicated by the downlink control signaling in a subframe receiving the downlink control signaling when the timeslot indication cell is invalid or the timeslot indication cell is not obtained from the downlink control signaling;
the sending unit is further configured to send uplink data in an nth subframe after the subframe receiving the downlink control signaling when the timeslot indication cell is invalid or the timeslot indication cell is not obtained from the downlink control signaling.
14. The apparatus of claim 9, wherein when the ue is in FDD mode, the value of i is any one of 3, 4, 5, and 6; and when the user terminal is in a TDD mode, i is more than or equal to 3.
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| CN111867014B (en) * | 2019-04-30 | 2022-06-17 | 大唐移动通信设备有限公司 | Scheduling indication method, terminal and network side equipment |
| CN116963243A (en) * | 2019-09-30 | 2023-10-27 | 大唐移动通信设备有限公司 | Energy-saving information transmission method, terminal and network side equipment |
| CN116633515A (en) | 2019-09-30 | 2023-08-22 | 大唐移动通信设备有限公司 | Energy-saving information transmission method, base station and terminal |
| CN115801111B (en) * | 2023-02-10 | 2023-04-25 | 成都戎星科技有限公司 | Method for realizing MF-TDMA signal user time slot data separation |
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| CN106817773B (en) | 2019-07-19 |
| CN110267352A (en) | 2019-09-20 |
| CN106817773A (en) | 2017-06-09 |
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