WO2017070903A1

WO2017070903A1 - Scheduling method, device and system

Info

Publication number: WO2017070903A1
Application number: PCT/CN2015/093255
Authority: WO
Inventors: 栗忠峰; 李华; 吴宁; 郭房富
Original assignee: 华为技术有限公司
Priority date: 2015-10-29
Filing date: 2015-10-29
Publication date: 2017-05-04
Also published as: CN107113813A

Abstract

An embodiment of the present invention relates to the technical field of communications and discloses a scheduling method, device and system, for reducing network system overheads. The method comprises: determining, by a first node, first scheduling information, the first scheduling information comprising the scheduling information of each timeslot of specific timeslots, the specific timeslots comprising a first downlink timeslot and at least one timeslot after the first downlink timeslot; transmitting, by the first node, the first scheduling information to a second node in the first downlink timeslot; wherein, the coherence time of the channel between the first node and the second node is greater than or equal to a preset threshold, and the time length between a starting time of the first downlink timeslot and the ending time of the timeslot of the specific timeslots having the latest ending time is less than or equal to the preset threshold.

Description

Scheduling method, device and system

Technical field

The present invention relates to the field of communications technologies, and in particular, to a scheduling method, apparatus, and system.

Background technique

In a Long Term Evolution (LTE) system, a base station schedules resources used by a user by transmitting scheduling information to a user on a Physical Downlink Control Channel (PDCCH). The scheduling information includes Downlink Control Information (DCI), and the DCI corresponding to the user in the downlink subframe is used to indicate which modulation and coding modes the user uses to receive information on the time-frequency resources, and on the uplink subframe. The DCI corresponding to the user is used to indicate which modulation and coding modes the user uses to transmit information on which time-frequency resources.

Under the condition of Time-Division Duplex (TDD), the base station sends scheduling information in each downlink subframe, and the scheduling information sent in one downlink subframe includes the DCI corresponding to the user in the downlink subframe, and The DCI corresponding to the user on one or more uplink subframes subsequent to the downlink subframe may be included. As shown in FIG. 1 , it is a schematic diagram of a TDD frame configuration in an LTE system, where D represents a downlink subframe, U represents an uplink subframe, and S represents a special subframe (usually used as a downlink subframe). In FIG. 1 , the scheduling of the uplink subframe is as indicated by the arrow in FIG. 1 . For example, the scheduling information sent by the base station on the downlink subframe 4 includes the DCI corresponding to the user in the downlink subframe 4, and includes the uplink subframe. The DCI corresponding to the user on frame 8 is the same as the indications of the remaining arrows.

The base station needs to transmit scheduling information in each downlink subframe, and in some channels, in an application scenario in which the channel changes rapidly between the base station and the user, in a scenario in which the base station determines how to schedule the resource according to the speed of the channel change. Under the application scenario with relatively simple changes (for example, wireless backhaul scenario), the overhead of the network system is larger when the above method is adopted.

Summary of the invention

Embodiments of the present invention provide a scheduling method, apparatus, and system for reducing overhead of a network system.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

In a first aspect, a scheduling method is provided. When a coherence time of a channel between a first node and a second node is greater than or equal to a preset threshold, the method includes:

The first node determines the first scheduling information and sends the first scheduling information to the second node in the first downlink time slot;

The first scheduling information includes scheduling information of each time slot in a specific time slot, where the specific time slot includes a first downlink time slot and at least one time slot after the first downlink time slot; The length of time between the start time of the slot and the end time of the latest slot of the end time in the specific slot is less than or equal to a preset threshold.

With reference to the first aspect, in a first possible implementation manner, in an uplink hybrid automatic repeat request HARQ process, when the first node fails to determine whether the first data is correctly received in the first downlink time slot, and When a node can determine whether the first data is correctly received in the second downlink time slot, the method further includes:

The first node sends the second scheduling information to the second node in the second downlink time slot, where the second scheduling information includes scheduling information of the second time slot, and the scheduling information of the second time slot is that the second node is in the second time slot. The scheduling information on which the second data is sent;

When the first node determines that the first data is correctly received in the second downlink time slot, the scheduling information of the second time slot included in the second scheduling information is that the first node reserves the second time slot in the first scheduling information. Information of the scheduling resource; or, when the first node determines that the first data is not correctly received in the second downlink time slot, the scheduling information of the second time slot included in the second scheduling information and the scheduling information of the first time slot the same;

The specific time slot includes a second time slot, the second node sends the first data to the first node in the first time slot, the second data is the first data sent by the second node after sending the first data, and the second The downlink time slot is before the second time slot.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, in a downlink HARQ process, when the first node cannot determine the second node in the first downlink time slot If the third data is correctly received, and the first node can determine whether the second node correctly receives the third data in the third downlink time slot, the method further includes:

The first node sends third scheduling information to the second node in the third downlink time slot, where the third scheduling information includes scheduling information of the fourth time slot, and the scheduling information of the fourth time slot is that the second node is in the fourth time slot. The scheduling information on which the fourth data is received;

When the first node determines that the second node correctly receives the third data in the third downlink time slot, the scheduling information of the fourth time slot included in the third scheduling information is that the first node is the fourth time in the first scheduling information. The information of the scheduling resource reserved by the slot; or, when the first node determines that the second node does not correctly receive the third data in the third downlink time slot, the scheduling information of the fourth time slot included in the third scheduling information is The scheduling information of the three slots is the same;

The specific time slot includes a fourth time slot, and the first node sends the third data to the second node in the third time slot, where the fourth data is the first data sent after the first node sends the third data, and the third downlink The time slot is before the fourth time slot or the third downlink time slot is the fourth time slot.

With reference to the first aspect, the first possible implementation manner of the first aspect, or the second possible implementation manner, in a third possible implementation manner, the method further includes:

The first node sends a downlink reference signal to the second node in the fourth downlink time slot.

With reference to the first aspect, the first possible implementation of the first aspect, and the third possible implementation manner, in a fourth possible implementation, the method further includes:

The first node receives the uplink reference signal sent by the second node in the first uplink time slot, and sends the data sent by the second node to the at least one uplink time slot after the first uplink time slot and the first uplink time slot according to the uplink reference signal. Perform demodulation;

The time length between the start time of the first uplink time slot and the end time of the latest time slot of the end time in at least one uplink time slot after the first uplink time slot is small. Or equal to the preset threshold.

With reference to the first possible implementation manner of the first aspect, in a fifth possible implementation, the scheduling information of the second time slot included in the second scheduling information is indicated by an identifier; When the first identifier is used, the scheduling information of the second time slot included in the second scheduling information is a scheduling resource reserved by the first node for the second time slot in the first scheduling information. If the identifier is the second identifier, the scheduling information of the second time slot included in the second scheduling information is the same as the scheduling information of the first time slot.

With reference to the second possible implementation of the first aspect, in a sixth possible implementation, the scheduling information of the fourth time slot included in the third scheduling information is indicated by an identifier; When the first identifier is used, the scheduling information of the fourth time slot included in the third scheduling information is a scheduling resource reserved by the first node for the fourth time slot in the first scheduling information. The information of the fourth time slot included in the third scheduling information is the same as the scheduling information of the third time slot.

With reference to the first possible implementation manner of the first aspect or the fourth possible implementation manner, in a seventh possible implementation manner, when the first node determines that the second downlink time slot is correctly received, In the first data, the first node demodulates the second data by using an uplink reference signal of the second time slot, and the uplink reference signal of the second time slot is the second node in the a last uplink reference signal transmitted before the first time slot after the second time slot; when the first node determines that the first data is not correctly received in the second downlink time slot, the first node The second data is demodulated by using an uplink reference signal used when demodulating the first data.

In a second aspect, a scheduling method is provided. When a coherence time of a channel between a first node and a second node is greater than or equal to a preset threshold, the method includes:

Receiving, by the second node, the first scheduling information that is sent by the first node in the first downlink time slot, and according to the scheduling information of the specific time slot included in the first scheduling information, in a specific time slot Transmitting or receiving data on the slot; the specific time slot includes the first downlink time slot and at least one time slot after the first downlink time slot;

The length of time between the start time of the first downlink time slot and the end time of the latest time slot of the end time in the specific time slot is less than or equal to a preset threshold.

In combination with the second aspect, in a first possible implementation manner, the method further includes:

The second node receives the second scheduling information that is sent by the first node in the second downlink time slot, and sends the second data on the second time slot according to the scheduling information of the second time slot included in the second scheduling information;

The specific time slot includes a second time slot, and the second downlink time slot is before the second time slot. When the first node determines that the first data is correctly received in the second downlink time slot, the second scheduling information includes the first The scheduling information of the second time slot is information of the scheduling resource reserved by the first node for the second time slot in the first scheduling information; or, when the first node determines that the first data is not correctly received in the second downlink time slot The scheduling information of the second time slot included in the second scheduling information is the same as the scheduling information of the first time slot, and the second node sends the first data in the first time slot.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner, the method further includes:

The second node receives the third scheduling information that is sent by the first node in the third downlink time slot, and receives the fourth data on the fourth time slot according to the scheduling information of the fourth time slot included in the third scheduling information;

The specific time slot includes a fourth time slot, the third downlink time slot is before the fourth time slot or the third downlink time slot is the fourth time slot, and the first node determines that the second node correctly receives the third downlink time slot. When the third data is used, the scheduling information of the fourth time slot included in the third scheduling information is information of the scheduling resource reserved by the first node for the fourth time slot in the first scheduling information; or, when the first node is in When the third downlink time slot determines that the second node does not correctly receive the third data, the scheduling information of the fourth time slot included in the third scheduling information is the same as the scheduling information of the third time slot, and the first node is in the third time slot. Send a third to the second node data.

With reference to the second aspect, the first possible implementation manner of the second aspect, or the second possible implementation manner, in a third possible implementation manner, the method further includes:

The second node receives the downlink reference signal sent by the first node in the fourth downlink time slot, and performs, according to the downlink reference signal, data sent by the first node in the at least one downlink time slot after the fourth downlink time slot and the fourth downlink time slot. demodulation;

The length of time between the start time of the fourth downlink time slot and the end time of the latest time slot of the end time in the at least one downlink time slot after the fourth downlink time slot is less than or equal to a preset threshold.

With reference to the second aspect, the first possible implementation manner of the second aspect, and the third possible implementation manner, in a fourth possible implementation manner, the method further includes:

The second node sends an uplink reference signal to the first node in the first uplink time slot.

With reference to the first possible implementation manner of the second aspect, in a fifth possible implementation, the scheduling information of the second time slot included in the second scheduling information is indicated by an identifier; When the first identifier is used, the scheduling information of the second time slot included in the second scheduling information is a scheduling resource reserved by the first node for the second time slot in the first scheduling information. If the identifier is the second identifier, the scheduling information of the second time slot included in the second scheduling information is the same as the scheduling information of the first time slot.

With reference to the second possible implementation manner of the second aspect, in a sixth possible implementation, the scheduling information of the fourth time slot included in the third scheduling information is indicated by an identifier; When the first identifier is used, the scheduling information of the fourth time slot included in the third scheduling information is a scheduling resource reserved by the first node for the fourth time slot in the first scheduling information. The information of the fourth time slot included in the third scheduling information is the same as the scheduling information of the third time slot.

Combining the second possible implementation of the second aspect or the third possible implementation In a seventh possible implementation manner, when the second node correctly receives the third data, the second node demodulates the fourth by using a downlink reference signal of the fourth time slot. Data, the downlink reference signal of the fourth time slot is the last downlink reference signal sent by the first node before the first time slot after the fourth time slot; when the second node is not correctly received And when the third data is used, the second node demodulates the fourth data by using a downlink reference signal used when demodulating the third data.

In a third aspect, a first node is provided, where the first node includes: a determining unit and a first sending unit, where

a determining unit, configured to determine first scheduling information, where the first scheduling information includes scheduling information of each time slot in a specific time slot, where the specific time slot includes at least a first downlink time slot and a first downlink time slot One time slot;

a first sending unit, configured to send first scheduling information to the second node in the first downlink time slot;

The coherence time of the channel between the first node and the second node is greater than or equal to a preset threshold, and the start time of the first downlink time slot and the end time of the latest time slot of the end time in the specific time slot. The length of time between is less than or equal to the preset threshold.

With reference to the third aspect, in a first possible implementation manner, in an uplink hybrid automatic repeat request HARQ process, when the first node fails to determine whether the first data is correctly received in the first downlink time slot, and When a node can determine whether the first data is correctly received in the second downlink time slot,

The first sending unit is further configured to send second scheduling information to the second node in the second downlink time slot, where the scheduling information of the second time slot included in the second scheduling information is sent by the second node on the second time slot. The scheduling information on which the second data is based;

When the first node determines that the first data is correctly received in the second downlink time slot, the scheduling information of the second time slot included in the second scheduling information is that the first node reserves the second time slot in the first scheduling information. Information of the scheduling resource; or, when the first node determines that the first data is not correctly received in the second downlink time slot, the second information included in the second scheduling information The scheduling information of the time slot is the same as the scheduling information of the first time slot;

With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner, in a downlink HARQ process, when the first node cannot determine the second node in the first downlink time slot Whether the third data is correctly received, and the first node can determine whether the second node correctly receives the third data in the third downlink time slot,

The first sending unit is further configured to send third scheduling information to the second node in the third downlink time slot, where the scheduling information of the fourth time slot included in the third scheduling information is that the second node receives the fourth time slot. The scheduling information on which the four data is based;

With reference to the third aspect, the first possible implementation manner of the third aspect, or the second possible implementation manner, in a third possible implementation manner, the first node further includes:

The second sending unit is configured to send a downlink reference signal to the second node in the fourth downlink time slot.

With reference to the third aspect, the first possible implementation manner of the third aspect, and the third possible implementation manner, in the fourth possible implementation manner, the first node further includes:

a receiving unit, configured to receive an uplink reference signal sent by the second node in the first uplink time slot;

a demodulation unit, configured to demodulate data sent by the second node in the at least one uplink time slot after the first uplink time slot and the first uplink time slot according to the uplink reference signal;

The length of time between the start time of the first uplink time slot and the end time of the latest time slot of the end time in the at least one uplink time slot after the first uplink time slot is less than or equal to a preset threshold.

With reference to the first possible implementation manner of the third aspect, in a fifth possible implementation, the scheduling information of the second time slot included in the second scheduling information is indicated by an identifier; When the first identifier is used, the scheduling information of the second time slot included in the second scheduling information is a scheduling resource reserved by the first node for the second time slot in the first scheduling information. If the identifier is the second identifier, the scheduling information of the second time slot included in the second scheduling information is the same as the scheduling information of the first time slot.

With reference to the second possible implementation manner of the third aspect, in a sixth possible implementation, the scheduling information of the fourth time slot included in the third scheduling information is indicated by an identifier; When the first identifier is used, the scheduling information of the fourth time slot included in the third scheduling information is a scheduling resource reserved by the first node for the fourth time slot in the first scheduling information. The information of the fourth time slot included in the third scheduling information is the same as the scheduling information of the third time slot.

With reference to the first possible implementation manner of the third aspect, or the fourth possible implementation manner, in the seventh possible implementation manner, when the first node determines that the second downlink time slot is correctly received, In the first data, the first node demodulates the second data by using an uplink reference signal of the second time slot, and the uplink reference signal of the second time slot is the second node in the a last uplink reference signal transmitted before the first time slot after the second time slot; when the first node is determined in the second downlink time slot When the first data is not correctly received, the first node demodulates the second data by using an uplink reference signal used when demodulating the first data.

In a fourth aspect, a second node is provided, where the second node includes: a first receiving unit and a transceiver unit, where

a first receiving unit, configured to receive first scheduling information that is sent by the first node in the first downlink time slot;

a transceiver unit, configured to send or receive data on a time slot in a specific time slot according to scheduling information of a specific time slot included in the first scheduling information, where the specific time slot includes a first downlink time slot and a first downlink At least one time slot after the time slot;

In combination with the fourth aspect, in a first possible implementation manner,

The first receiving unit is further configured to receive second scheduling information that is sent by the first node in the second downlink time slot;

The transceiver unit is further configured to send the second data on the second time slot according to the scheduling information of the second time slot included in the second scheduling information;

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner,

The first receiving unit is further configured to receive, by the first node, the third downlink time slot Three scheduling information;

The transceiver unit is further configured to receive the fourth data on the fourth time slot according to the scheduling information of the fourth time slot included in the third scheduling information;

The specific time slot includes a fourth time slot, the third downlink time slot is before the fourth time slot or the third downlink time slot is the fourth time slot, and the first node determines that the second node correctly receives the third downlink time slot. When the third data is used, the scheduling information of the fourth time slot included in the third scheduling information is information of the scheduling resource reserved by the first node for the fourth time slot in the first scheduling information; or, when the first node is in When the third downlink time slot determines that the second node does not correctly receive the third data, the scheduling information of the fourth time slot included in the third scheduling information is the same as the scheduling information of the third time slot, and the first node is in the third time slot. Sending third data to the second node.

With reference to the fourth aspect, the first possible implementation manner of the fourth aspect, or the second possible implementation manner, in a third possible implementation manner, the second node further includes:

a second receiving unit, configured to receive a downlink reference signal that is sent by the first node in the fourth downlink time slot;

a demodulation unit, configured to demodulate data sent by the first node in the at least one downlink time slot after the fourth downlink time slot and the fourth downlink time slot according to the downlink reference signal;

With reference to the fourth aspect, the first possible implementation manner of the fourth aspect, and the third possible implementation manner, in the fourth possible implementation manner, the second node further includes:

And a sending unit, configured to send an uplink reference signal to the first node in the first uplink time slot.

With reference to the first possible implementation manner of the fourth aspect, in a fifth possible implementation, the scheduling information of the second time slot included in the second scheduling information is indicated by an identifier; When the first identifier is used, the second scheduling information is included in the packet The scheduling information of the second time slot is information of the scheduling resource reserved by the first node for the second time slot in the first scheduling information; when the identifier is the second identifier, The scheduling information of the second time slot included in the second scheduling information is the same as the scheduling information of the first time slot.

With reference to the second possible implementation manner of the fourth aspect, in a sixth possible implementation, the scheduling information of the fourth time slot included in the third scheduling information is indicated by an identifier; When the first identifier is used, the scheduling information of the fourth time slot included in the third scheduling information is a scheduling resource reserved by the first node for the fourth time slot in the first scheduling information. The information of the fourth time slot included in the third scheduling information is the same as the scheduling information of the third time slot.

With reference to the second possible implementation manner or the third possible implementation manner of the fourth aspect, in a seventh possible implementation manner, when the second node correctly receives the third data, the foregoing The second node demodulates the fourth data by using a downlink reference signal of the fourth time slot, where the downlink reference signal of the fourth time slot is the first time of the first node after the fourth time slot The last downlink reference signal sent before the slot; when the second node does not correctly receive the third data, the second node demodulates the downlink reference signal used when demodulating the third data Fourth data.

A fifth aspect provides a first node, including: a processor and a transmitter; wherein

a processor, configured to determine first scheduling information, where the first scheduling information includes scheduling information of each time slot in a specific time slot, where the specific time slot includes at least a first downlink time slot and a first downlink time slot One time slot;

a transmitter, configured to send first scheduling information to the second node in the first downlink time slot;

In combination with the fifth aspect, in a first possible implementation, in an upstream mix In the automatic retransmission request HARQ process, when the first node cannot determine whether the first data is correctly received in the first downlink time slot, and the first node can determine whether the first data is correctly received in the second downlink time slot,

The transmitter is further configured to send the second scheduling information to the second node in the second downlink time slot, where the scheduling information of the second time slot included in the second scheduling information is that the second node sends the second data in the second time slot. Scheduling information on which to base;

With reference to the fifth aspect, or the first possible implementation manner of the fifth aspect, in a second possible implementation manner, in a downlink HARQ process, when the first node cannot determine the second node in the first downlink time slot Whether the third data is correctly received, and the first node can determine whether the second node correctly receives the third data in the third downlink time slot,

The transmitter is further configured to send third scheduling information to the second node in the third downlink time slot, where the scheduling information of the fourth time slot included in the third scheduling information is that the second node receives the fourth data in the fourth time slot. Scheduling information on which to base;

Wherein, the specific time slot includes the fourth time slot, and the first node is in the third time slot to the second time slot The third data is sent by the point, and the fourth data is the first data sent after the first node sends the third data, and the third downlink time slot is before the fourth time slot or the third downlink time slot is the fourth time slot.

With reference to the fifth aspect, the first possible implementation manner of the fifth aspect, or the second possible implementation manner, in a third possible implementation manner,

The transmitter is further configured to send a downlink reference signal to the second node in the fourth downlink time slot.

With reference to the fifth aspect, the first possible implementation manner of the fifth aspect, and the third possible implementation manner, in the fourth possible implementation manner, the first node further includes:

a receiver, configured to receive an uplink reference signal sent by the second node in the first uplink time slot;

The processor is further configured to perform demodulation on the data sent by the second node in the first uplink time slot and the at least one uplink time slot after the first uplink time slot according to the uplink reference signal;

With reference to the first possible implementation manner of the fifth aspect, in a fifth possible implementation, the scheduling information of the second time slot included in the second scheduling information is indicated by an identifier; When the first identifier is used, the scheduling information of the second time slot included in the second scheduling information is a scheduling resource reserved by the first node for the second time slot in the first scheduling information. If the identifier is the second identifier, the scheduling information of the second time slot included in the second scheduling information is the same as the scheduling information of the first time slot.

With reference to the second possible implementation manner of the fifth aspect, in a sixth possible implementation, the scheduling information of the fourth time slot included in the third scheduling information is indicated by an identifier; When the first identifier is used, the scheduling information of the fourth time slot included in the third scheduling information is that the first node is in the first scheduling information. The information of the scheduling resource reserved for the fourth time slot; when the identifier is the second identifier, the scheduling information of the fourth time slot included in the third scheduling information is related to the third time slot The scheduling information is the same.

With reference to the first possible implementation manner of the fifth aspect, or the fourth possible implementation manner, in a seventh possible implementation manner, when the first node determines that the second downlink time slot is correctly received, In the first data, the first node demodulates the second data by using an uplink reference signal of the second time slot, and the uplink reference signal of the second time slot is the second node in the a last uplink reference signal transmitted before the first time slot after the second time slot; when the first node determines that the first data is not correctly received in the second downlink time slot, the first node The second data is demodulated by using an uplink reference signal used when demodulating the first data.

In a sixth aspect, a second node is provided, where the second node includes: a transceiver and a processor;

a transceiver, configured to receive first scheduling information that is sent by the first node in the first downlink time slot;

a processor, configured to determine scheduling information of a specific time slot included in the first scheduling information;

The transceiver is further configured to send or receive data on a time slot in a specific time slot according to scheduling information of a specific time slot included in the first scheduling information determined by the processor; wherein the specific time slot includes the first downlink time slot And at least one time slot subsequent to the first downlink time slot;

In combination with the sixth aspect, in a first possible implementation manner,

The transceiver is further configured to receive second scheduling information that is sent by the first node in the second downlink time slot;

The processor is further configured to determine scheduling information of the second time slot included in the second scheduling information;

The transceiver is further configured to send the second data on the second time slot according to the scheduling information of the second time slot included in the second scheduling information determined by the processor;

With reference to the sixth aspect or the first possible implementation manner of the sixth aspect, in a second possible implementation manner,

The transceiver is further configured to receive third scheduling information that is sent by the first node in the third downlink time slot;

The processor is further configured to determine scheduling information of a fourth time slot included in the third scheduling information;

The transceiver is further configured to receive the fourth data on the fourth time slot according to the scheduling information of the fourth time slot included in the third scheduling information determined by the processor;

With reference to the sixth aspect, the first possible implementation manner of the sixth aspect, or the second possible implementation manner, in a third possible implementation manner,

The transceiver is further configured to receive a downlink reference signal that is sent by the first node in the fourth downlink time slot;

The processor is further configured to perform demodulation on the data sent by the first node in the at least one downlink time slot after the fourth downlink time slot and the fourth downlink time slot according to the downlink reference signal;

With reference to the sixth aspect, the first possible implementation manner of the sixth aspect, and the third possible implementation manner, in a fourth possible implementation manner,

The transceiver is further configured to send an uplink reference signal to the first node in the first uplink time slot.

With reference to the first possible implementation manner of the sixth aspect, in a fifth possible implementation, the scheduling information of the second time slot included in the second scheduling information is indicated by an identifier; When the first identifier is used, the scheduling information of the second time slot included in the second scheduling information is a scheduling resource reserved by the first node for the second time slot in the first scheduling information. If the identifier is the second identifier, the scheduling information of the second time slot included in the second scheduling information is the same as the scheduling information of the first time slot.

With reference to the second possible implementation manner of the sixth aspect, in a sixth possible implementation, the scheduling information of the fourth time slot included in the third scheduling information is indicated by an identifier; When the first identifier is used, the scheduling information of the fourth time slot included in the third scheduling information is a scheduling resource reserved by the first node for the fourth time slot in the first scheduling information. The information of the fourth time slot included in the third scheduling information is the same as the scheduling information of the third time slot.

With reference to the second possible implementation manner or the third possible implementation manner of the sixth aspect, in a seventh possible implementation manner, when the second node correctly receives the third data, the foregoing The two nodes adopt the downlink reference signal demodulation of the fourth time slot The fourth data, the downlink reference signal of the fourth time slot is the last downlink reference signal sent by the first node before the first time slot after the fourth time slot; when the second When the node does not correctly receive the third data, the second node demodulates the fourth data by using a downlink reference signal used when demodulating the third data.

The seventh aspect provides a scheduling system, comprising: any one of the first node provided by the third aspect, and any one of the second nodes provided by the fourth aspect, or any one of the fifth aspects provided by the fifth aspect A node and any of the second nodes as provided by the sixth aspect.

The node in the embodiment of the present invention refers to an entity involved in air interface transmission in the network access side.

The method, device and system provided by the embodiments of the present invention can be applied in an application scenario in which the channel changes smoothly. For example, in a wireless backhaul scenario, the relative position between the macro base station and the small base station is fixed, so that the channel change between the macro base station and the small base station is gentle, and the channel is in a stable state for a long period of time. The first node may schedule more time slots at a time, that is, the scheduling information sent by the first node to the second node may include scheduling information of multiple time slots, so that in one frame, the first node only needs to The time slot in one frame can be scheduled by sending a small amount of scheduling information. Compared with the prior art, the first node does not need to send scheduling information in each downlink time slot, which greatly reduces the overhead of the network system.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic diagram of a TDD frame configuration in the prior art;

2 is a schematic diagram of a TDD frame configuration of a 0.5 ms TTI according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a TDD frame configuration of a 0.5 ms TTI according to an embodiment of the present invention. intention;

Figure 3-b is a schematic diagram of an uplink process configuration corresponding to the frame configuration shown in Figure 3-a.

Figure 3-c is a schematic diagram of a downlink process configuration corresponding to the frame configuration shown in Figure 3-a;

FIG. 4 is a flowchart of a scheduling method according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a wireless backhaul scenario according to an embodiment of the present invention;

6-a is a schematic diagram of a TDD frame configuration of a 0.5 ms TTI according to an embodiment of the present invention;

6-b is a schematic diagram of a configuration of an uplink process corresponding to the frame configuration shown in FIG. 6-a and a scheduling diagram thereof;

6-c is a schematic diagram of a downlink process configuration and a scheduling diagram corresponding to the frame configuration shown in FIG. 6-a;

7-a is a schematic diagram of a TDD frame configuration of a 0.5 ms TTI according to an embodiment of the present invention;

FIG. 7-b is a schematic diagram of a configuration of an uplink process corresponding to the frame configuration shown in FIG. 7-a and a scheduling diagram thereof;

FIG. 7-c is a schematic diagram of a downlink process configuration and a scheduling diagram corresponding to the frame configuration shown in FIG. 7-a;

FIG. 8-a is a schematic diagram of a TDD frame configuration of a 0.5 ms TTI according to an embodiment of the present invention;

FIG. 8-b is a schematic diagram of a configuration of an uplink process corresponding to the frame configuration shown in FIG.

FIG. 8-c is a schematic diagram of a downlink process configuration and a scheduling diagram corresponding to the frame configuration shown in FIG. 8-a;

9-a is a schematic diagram of a TDD frame configuration of a 0.5 ms TTI according to an embodiment of the present invention;

9-b is a schematic diagram of a configuration of an uplink process corresponding to the frame configuration shown in FIG. 9-a and a scheduling diagram thereof;

9-c is a schematic diagram of a downlink process configuration and scheduling diagram corresponding to the frame configuration shown in FIG. 9-a;

FIG. 10-a is a schematic diagram of a TDD frame configuration of a 0.5 ms TTI according to an embodiment of the present invention;

FIG. 10-b is a schematic diagram of a configuration of an uplink process corresponding to the frame configuration shown in FIG. 10-a and a scheduling diagram thereof;

FIG. 10-c is a schematic diagram of a downlink process configuration and a scheduling diagram corresponding to the frame configuration shown in FIG. 10-a;

11-a is a schematic diagram of a TDD frame configuration of a 0.5 ms TTI according to an embodiment of the present invention;

11-b is a schematic diagram of a configuration of an uplink process corresponding to the frame configuration shown in FIG. 11-a and a scheduling diagram thereof;

11-c is a schematic diagram of a downlink process configuration and a scheduling diagram corresponding to the frame configuration shown in FIG. 11-a;

FIG. 12 is a schematic structural diagram of a first node according to an embodiment of the present disclosure;

FIG. 13 is a schematic structural diagram of still another first node according to an embodiment of the present disclosure;

FIG. 14 is a schematic structural diagram of still another first node according to an embodiment of the present disclosure;

FIG. 15 is a schematic structural diagram of still another first node according to an embodiment of the present disclosure;

FIG. 16 is a schematic structural diagram of a second node according to an embodiment of the present disclosure;

FIG. 17 is a schematic structural diagram of still another second node according to an embodiment of the present disclosure;

FIG. 18 is a schematic structural diagram of still another second node according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The term "and/or" in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, W and / or Z, which may indicate that W exists separately, while W and Z exist, respectively. Z these three situations. "Multiple" as used herein refers to two or more.

The technical solution provided by the embodiment of the present invention is exemplified in the embodiment of the present invention by using a TDD frame configuration of a 0.5 ms Transmission Time Interval (TTI) compatible with the LTE system. Illustratively, a TDD frame configuration of a 0.5 ms TTI in the embodiment of the present invention may be as shown in FIG. 2. In the frame configuration provided by the embodiment of the present invention, D represents a downlink time slot, U represents an uplink time slot, and S represents Special time slot. In the embodiment of the present invention, the first node and the second node use a Hybrid Automatic Repeat ReQuest (HARQ) process to transmit information in parallel transmission mode. It should be noted that the node in the embodiment of the present invention refers to an entity that is involved in the air interface transmission in the network access side, and may be, for example, a base station or a user equipment (User Equipment, UE for short).

Specifically, as shown in FIG. 3, FIG. 3-a in FIG. 3 is a schematic diagram of a TDD frame configuration of a 0.5 ms TTI, and FIG. 3B in FIG. 3 is a configuration diagram of an uplink process in the case of the frame configuration, and FIG. 3 Figure 3-c is a configuration diagram of the downlink process in the case of the frame configuration. For the configuration method of the HARQ process, refer to the prior art. The relevant meanings in the other figures are similar and will not be described below.

In FIG. 3, T _x represents transmission data, R represents a transmission reply, and R may be an Acknowledgement (ACK), or may be a Negative Acknowledgement (NACK). The uplink process has a total of six, which are respectively labeled as 0, 1, 2, 3, 4, and 5. The T _x on the time slot 4 in the uplink process 0 indicates that the second node sends data to the first node in the time slot. R on time slot 11 indicates that the first node sends a reply to the second node in the time slot, the reply being a reply of the last data sent by the second node to the first node before time slot 11, the reply being used to inform Whether the first node of the second node correctly receives the data, and after receiving the reply, if the second node determines that the reply is an ACK, the second node determines that the first node correctly receives the data, and if the response is determined to be NACK When the second node determines that the first node does not correctly receive the data, the interpretation of the remaining processes is similar.

There are four downlink processes, which are labeled as 0, 1, 2, and 3. The downlink process 0 in the slot 0 T _x indicates that the first node sends data to the second node in the slot, and the R in slot 4 indicates The two nodes send a reply to the first node in the time slot, and the reply is a reply of the last data sent by the first node to the second node before the time slot 4. After the first node receives the reply, if the response is determined to be In the case of ACK, the first node determines that the second node correctly receives the data. If it is determined that the reply is a NACK, the first node determines that the second node does not correctly receive the data, and the interpretation of the remaining processes is similar. The relevant meanings in the remaining figures are similar and will not be described below.

It should be noted that when receiving the data sent by the Node B, the node A needs a certain time to process to determine whether the data is correctly received. When it is determined that the data is correctly received, the node sends an ACK to the Node B. When the data is correctly received, a NACK is sent to the Node B. When receiving the reply sent by the Node B for one data, the node A needs a certain time to process to determine whether to retransmit the data or the newly transmitted data. When it is determined that the reply is an ACK, the new data is determined, and when the response is determined to be When NACK, it is determined to retransmit the data. The node A may be the first node. In this case, the node B is the second node; the node A may also be the second node. In this case, the node B is the first node, and the node A and the node need to be described. The processing time required by B after receiving data or reply may be the same or different.

In the embodiment of the present invention, the processing time required for the first node and the second node to receive data or reply is as follows: the first node needs at most 1.5 ms processing time when receiving the data sent by the second node; The node needs at most 1.5 ms processing time when receiving the data sent by the first node; the first node needs at most 1.5 ms processing time when receiving the reply sent by the second node; the second node sends the first node to receive the response. The response time can take up to 1ms of processing time.

The embodiment of the present invention provides a scheduling method. As shown in FIG. 4, when the coherence time of the channel between the first node and the second node is greater than or equal to a preset threshold, the method includes:

401. The first node determines first scheduling information.

Specifically, the first scheduling information includes scheduling information of each time slot in a specific time slot, where the specific time slot includes at least one time slot after the first downlink time slot and the first downlink time slot.

The method provided by the embodiment of the present invention can be applied to a wireless backhaul scenario. Specifically, as shown in FIG. 5, in the scenario, the first node is a macro base station, and the second node is a small base station, because the macro base station and the small base station The relative position is fixed, and therefore, the coherence time of the channel between the macro base station and the small base station is long (that is, the channel change between the macro base station and the small base station is stable). The method provided by the embodiment of the present invention can also be applied to other scenarios in which the channel changes are stable and the spectrum efficiency is high. For example, if the channel change between the small base station and the small base station is stable, the first node and the second node in the method may also be small base stations. If the channel change between the base station and the UE is stable, the method The first node in the middle node may be a base station, and the second node is a UE. Specifically, the channel change speed between the first node and the second node may be determined by using a statistically obtained coherence time of the channel between the first node and the second node, and the longer the coherence time, the first node and the second node The slower the channel change between. It should be noted that the first node may perform scheduling on the resources used by the multiple second nodes. In the embodiment of the present invention, the first node uses the resources used by the second node to perform scheduling.

Specifically, the multiple time slots in the “specific time slot” may be a plurality of consecutive time slots, or may be a plurality of time slots that are not consecutive. For the convenience of description, in the embodiment of the present invention, “specific time slots” are used. The plurality of slots in the middle are described as an example of a plurality of consecutive slots. Uplink slots and/or downlink slots may be included in a particular time slot. The scheduling information of the uplink time slot is used to indicate on which time-frequency resources the second node uses the modulation and coding mode on the uplink time slot, and the scheduling information of the downlink time slot is used to indicate that the second node is in the downlink. What modulation and coding methods are used on the time slots to receive data on which time-frequency resources.

Specifically, the scheduling information of one time slot may be indicated by the DCI corresponding to the second node on the time slot. The scheduling information of one slot includes at least a frequency domain resource and a modulation and demodulation method.

The preset threshold in the embodiment of the present invention may be determined according to an actual application scenario, which is not limited by the embodiment of the present invention.

402. The first node sends the first scheduling information to the second node in the first downlink time slot.

Specifically, the first downlink time slot may be any one of the downlink time slots in a frame.

403. The second node receives the first scheduling information that is sent by the first node in the first downlink time slot, and sends or receives the time slot in the specific time slot according to the scheduling information of the specific time slot included in the first scheduling information. data.

Specifically, after receiving the first scheduling information, the first node sends data on the uplink time slot according to the scheduling information of the uplink time slot in the specific time slot, according to the scheduling information of the downlink time slot in the specific time slot. Receive data on the downlink time slot.

_{_1,} P ₁ (shown in FIG. 19 specific time, a first node may transmit scheduling information to the second node P 6 in slot 0 of each frame (the first downlink slot) comprises a slot 0 to slot gap) in each time slot corresponding to the DCI second node, the second node after receiving the P _1, depending on each slot 19 in the P ₁ slot comprises time slot 1 to the second node The scheduling resources indicated in the corresponding DCI transmit or receive data on slot 1 to slot 19. In this case, the first node may re-allocate scheduling resources for each of slot 0 to slot 19 in slot 0 of each frame, the method may be applied to the channel between the first node and the second node. The coherence time is greater than or equal to 10ms (ie, the channel changes very slowly).

The first downlink time slot may also be another downlink time slot. In this case, the scheduling information of the time slot before the first downlink time slot may be included in the previous frame sent by the first node. In the dispatch information sent.

Certainly, when the coherence time of the channel between the first node and the second node is short, the first node may send multiple scheduling information to the second node in one frame, and may include time in the scheduling information sent by the time slot x. The slot x and the scheduling information of the slot between the slot x and the slot y, the scheduling information sent by the first node to the second node in the slot x and the scheduling information sent to the second node in the slot y are two phases. Neighbor scheduling information.

The method provided by the embodiment of the present invention can be applied to an application scenario in which channel variation is stable. For example, in a wireless backhaul scenario, the relative position between the macro base station and the small base station is fixed, so that the channel change between the macro base station and the small base station is gentle, and the channel is in a stable state for a long period of time. The first node may schedule more time slots at a time, that is, the scheduling information sent by the first node to the second node may include scheduling information of multiple time slots, so that in one frame, the first node only needs to The time slot in one frame can be scheduled by sending a small amount of scheduling information. Compared with the prior art, the first node does not need to send scheduling information in each downlink time slot, which greatly reduces the overhead of the network system.

Optionally, in an uplink HARQ process, when the first node cannot determine whether the first data is correctly received in the first downlink time slot, and the first node is determined in the second downlink time slot, When the first data is correctly received, the method further includes:

11) The first node sends second scheduling information to the second node in the second downlink time slot;

12) The second node receives second scheduling information that is sent by the first node in a second downlink time slot;

13) The second node sends the second data on the second time slot according to the scheduling information of the second time slot included in the second scheduling information.

The scheduling information of the second time slot included in the second scheduling information is the first when the first node determines that the first data is correctly received in the second downlink time slot. a tone reserved by the node for the second time slot in the first scheduling information Information of the resource; or, when the first node determines that the first data is not correctly received in the second downlink time slot, scheduling of the second time slot included in the second scheduling information The information is the same as the scheduling information of the first time slot; the second time slot belongs to the specific time slot, and the first data is sent by the second node to the first node in the first time slot. Data, the second data is the first data sent by the second node after sending the first data, and the second downlink time slot is before the second time slot.

It should be noted that the correct receiving of the data by the base station includes: the base station receives the data and can successfully decode the data; the base station does not correctly receive the data, the base station does not receive the data, or the base station receives the data but does not successfully decode the data. .

Specifically, the first time slot and the second time slot are both uplink time slots.

Optionally, in an uplink HARQ process, when the first node is able to determine whether the first data is correctly received in the first downlink time slot, the scheduling information of the second time slot included in the first scheduling information is first. The information of the scheduling resource re-allocated by the node for the second time slot; when the first node cannot determine whether the first data is correctly received in the first downlink time slot, the scheduling information of the second time slot included in the first scheduling information Information about the scheduling resource reserved for the second time slot by the first node.

Specifically, in an uplink HARQ process, when the time interval between the first time slot and the first downlink time slot is smaller than the processing time required by the first data (ie, 1.5 ms), the first node is first. The time slot cannot determine whether the first data is correctly received, and thus the acknowledgment of the first data sent to the second node is ACK or NACK, and the second node cannot determine whether the retransmitted data or the newly transmitted data is used. The first node may reserve scheduling resources for the second time slot, so that the second node uses the reserved scheduling resource in the second time slot whether it is newly transmitted data or retransmitted data.

When the time interval between the first time slot and the first downlink time slot is not less than the processing time of the first data, it is indicated that the first node can determine whether the first data is correctly received in the first downlink time slot, in this case, The first node can directly allocate the appropriate scheduling for the second time slot. The resource is used by the second node to retransmit data or newly transmitted data on the second time slot. For example, when the first node does not correctly receive the first data, in order to ensure that the first node can correctly receive the data after the second node retransmits the data, the first node may allocate a relatively large scheduling resource for the second time slot.

Exemplarily, as shown in FIG. 7, when the preset threshold is 5 ms, in the process of scheduling the time slot 10 to the time slot 19 by the first node, the first node may send the first node to the second node in the time slot 10. A scheduling information P ₁ , P ₁ includes the DCI corresponding to the second node in each of the time slots 10 to 19 . In uplink process 0, the second node transmits data (first data) to the first node in time slot 4 (first time slot), and the time interval between time slot 4 and time slot 10 is greater than 1.5 ms, then the first node 10 is able to determine whether a slot receiving the data correctly, in this case, P ₁ included in the time slot 14 (the second slot) scheduling information to the scheduling node 14 resource reallocation information slots . Similarly, the scheduling information and the uplink time slots 15 1 P ₁ in the process in the process 2 includes an uplink time slot of the first node 16 are information resource scheduling slot 15 and slot 16 newly assigned.

In the uplink process 3, the second node transmits data (first data) to the first node in time slot 7 (first time slot), and the time interval between time slot 7 and time slot 10 is less than 1.5 ms, then the first node slot 10 can not determine whether the data is correctly received, in this case, the first node 17 reserved for the time slot scheduling resources, P ₁ slot scheduling information included in the first node 17 to pre-slot 17 Information about the scheduled resources left. Similarly, the scheduling information in the slot 19 of the slot 4 P ₁ upstream processes included in the process 18 and upstream of the first node 5 are the information resource scheduling slot 18 and slot 19 reserved. In the optional method, when the first node is able to determine whether the first data is correctly received in the first downlink time slot, the scheduling information of the second time slot may be determined according to a specific situation.

Specifically, based on the example described in FIG. 7, as shown in FIG. 8, the first node performs scheduling for the time slot 10 to the time slot 19, and for the uplink process 3, the time slot 11 and the time slot 12 And the time interval between slot 13 and slot 7 is not less than 1.5 ms and slot 11, slot 12 and slot 13 are both downlink slots, and therefore, the first node is in slot 11, slot 12 or slot. 13 can determine whether the data sent by the second node in the time slot 7 is correctly received, then the second downlink time slot can be time slot 11, time slot 12 or time slot 13, for the same reason, for the uplink process 4, the second The downlink time slot may be time slot 12 or time slot 13, and for the uplink process 5, the second downlink time slot may be time slot 13. In this case, in order to reduce the number of times of scheduling information to be transmitted, the first node may send the second scheduling information P ₂ to the second node in the time slot 13, and the P ₂ may include the time slot 17 in the uplink process 3 and the uplink process 4 Scheduling information for time slot 18 in time slot 18 and time slot 19 in uplink process 5. Wherein, when the first node is received correctly at the second node when the first node determines the time slot 13 during the data transmission time slot 7, P ₂ included in the time slot schedule information 17 is included in the P ₁ slot is 17 information of the reserved scheduling resource, when the first node determines in the time slot 13 that the data sent by the second node in the time slot 7 is not correctly received, the scheduling information of the time slot 17 included in P ₂ and the time slot 7 The scheduling information is the same. Similarly, the scheduling information of the time slot 18 and the time slot 19 included in P ₂ can be determined.

It should be noted that the frames shown in FIG. 6, FIG. 7 and FIG. 8 are configured in the same frame configuration, and based on the examples described in FIG. 7 and FIG. 8, both are channels between the first node and the second node. The coherence time is greater than or equal to 5 ms as an example.

Optionally, the scheduling information of the second time slot included in the second scheduling information is indicated by an identifier; when the identifier is the first identifier, the second information included in the second scheduling information The scheduling information of the time slot is information of the scheduling resource reserved by the first node for the second time slot in the first scheduling information; when the identifier is the second identifier, the second scheduling information The scheduling information of the second time slot included in the same is the same as the scheduling information of the first time slot.

The scheduling information of the second time slot included in the second scheduling information is: scheduling information that is the same as the scheduling information of the first time slot, or information of the scheduling resource reserved for the second time slot in the first scheduling information. Therefore, the second scheduling information may directly indicate which scheduling information is used by the second time slot by using the identifier. Exemplarily, based on the example described in FIG. 8, the first node in the process of scheduling time slot 10 to time slot 19, the above process 3 is taken as an example, when the first node is in time slot 13, it is determined that it is correctly received. when the data transmission node on the slot 7, the first node determines the time slot scheduling information included in the 17 P ₂ is the first node P ₁ comprises 17 time slots reserved for the scheduling information resources, the In the case, the identifier for the time slot 17 included in the second scheduling information is the first identifier; when the first node determines in the time slot 13 that the data sent by the second node on the time slot 7 is not correctly received, the first P ₂ node determines scheduling information included in the slot 17 and the slot 7 is the same as the scheduling information, in this case, included in the second scheduling information for identifying a second slot 17 for identification.

When the scheduling information of the n timeslots is included in the second scheduling information, the value of the n bits can be indicated, and one bit corresponds to one time slot. In this case, the first identifier can be 0 (1). The second identifier may be 1 (0), n ≥ 1, and n is an integer.

The optional method is such that the scheduling information of the time slot in the second scheduling information sent by the first node is not directly indicated, but is indicated by the value of the bit, so that the second scheduling information includes only a few bits. The value of the information reduces the transmission overhead.

Optionally, in a downlink HARQ process, when the first node is in the first downlink time slot, it is not determined whether the second node correctly receives the third data, and the first node is in the third When the downlink time slot is capable of determining whether the second node correctly receives the third data, the method further includes:

21) The first node sends third scheduling information to the second node in the third downlink time slot;

22) The second node receives third scheduling information that is sent by the first node in a third downlink time slot;

23) The second node receives fourth data on the fourth time slot according to scheduling information of a fourth time slot included in the third scheduling information.

The scheduling information of the fourth time slot included in the third scheduling information, when the first node determines that the second node correctly receives the third data in the third downlink time slot. The fourth node is the fourth in the first scheduling information. The information of the scheduling resource reserved by the time slot; or, when the first node determines that the second node does not correctly receive the third data in the third downlink time slot, in the third scheduling information The scheduling information of the fourth time slot included is the same as the scheduling information of the third time slot; the fourth time slot belongs to the specific time slot, and the first node is in the third time slot to the first time slot The second node sends the third data, where the fourth data is the first data sent after the first node sends the third data, and the third downlink time slot is before the fourth time slot or The third downlink time slot is the fourth time slot.

Specifically, the third time slot and the fourth time slot are both downlink time slots.

Optionally, in a downlink HARQ process, when the first node is able to determine, in the first downlink time slot, whether the second node correctly receives the third data, the first scheduling information The scheduling information of the fourth time slot included in the information is information about the scheduling resource that the first node re-allocates for the fourth time slot; when the first node cannot determine the first downlink time slot When the second node correctly receives the third data, the scheduling information of the fourth time slot included in the first scheduling information is a scheduling resource reserved by the first node for the fourth time slot. Information.

Specifically, in a downlink HARQ process, after the first node sends the third data on the third time slot, the second node sends a reply of the third data on the preset time slot, when the first node receives the first When the two nodes send a reply on the preset time slot and the time interval between the preset time slot and the first downlink time slot is less than the processing time of the reply, the first node cannot determine whether the second node correctly receives the first time. Three data; when the time interval between the preset time slot and the first downlink time slot is not less than the processing time of the reply, the first node can determine whether the second node correctly receives the third data. Specifically, when the first node receives the reply of the third data sent by the second node on the preset time slot and determines that the reply is an ACK, the first node determines that the second node correctly receives the third data; When the node does not receive the reply of the third data sent by the second node on the preset time slot or receives the reply but determines that the reply is NACK, the first node determines that the second node does not correctly receive the third data.

Exemplarily, as shown in FIG. 7, in the process of scheduling the time slot 10 to the time slot 19 by the first node, in the downlink process 0, the second node sends a reply to the first node on the time slot 4, Responding to the reply of the data (third data) sent by the first node to the second node on slot 0 (third time slot), the time between slot 4 and time slot 10 (the first downlink time slot) The interval is greater than 1.5 ms, the first node can determine whether the reply is an ACK or a NACK, that is, the first node can determine whether the second node correctly receives the data sent by the first node in slot 0. In this case, the first node can directly A suitable scheduling resource is allocated for time slot 10 (fourth time slot) for the first node to retransmit data or newly transmitted data on time slot 10. Similarly, the first node may determine the scheduling information in the second slot in slot 1 P ₁ transmitted in the slot 10 includes a downstream process 11 and processes the downlink 12 by the above method.

In the downlink process 3, the first node receives a reply sent by the second node in the time slot 7, and the reply is data (the third data) sent by the first node to the second node on the time slot 3 (third time slot). The reply, because the time interval between the time slot 7 and the time slot 10 is less than 1.5 ms, in this case, the first node cannot determine whether the reply is an ACK or a NACK at the time slot 10, that is, the first node is in the time slot 10 had not been made to determine whether the second node data transmitted in time slot 3 to the first node correctly received, therefore, the first node 13 reserved for the time slot scheduling resources, including the first point in the transmission time slot 10 ₁ P The scheduling information of the time slot 13 is information of the scheduling resource reserved by the first node for the time slot 13.

It should be noted that the third downlink time slot and the second downlink time slot may be the same time slot or different time slots, and the third scheduling information and the second scheduling information may be the same scheduling information, or may be different scheduling information. The embodiments of the present invention are not limited.

Exemplarily, based on the example described in FIG. 7, as shown in FIG. 8, the first node is in the process of scheduling time slot 10 to time slot 19, in the downlink process 3, due to time slot 11, time slot 12 And the time interval between the time slot 13 and the time slot 7 is not less than 1.5 ms, that is, the first node can determine whether the second node correctly receives the first node on the time slot 3 in the time slot 11, the time slot 12 or the time slot 13. The transmitted data, and the time slot 11, the time slot 12, and the time slot 13 are all downlink time slots. Therefore, the third downlink time slot may be time slot 11, time slot 12, or time slot 13, in which case, in order to reduce transmission The scheduling information of the time slot 13 in the downlink process 3 may also be included in the P ₂ , that is, in this case, the third downlink time slot and the second downlink time slot are the same time slot, and the third scheduling information is The second scheduling information is the same scheduling information. Wherein, when the first node when the second node determines the time slot 13 to the first node correctly receives data transmitted during slot 3, P ₂ scheduling information included in the time slot 13 is included in the first node P ₁ resource scheduling information for the reserved slot 13, when the first node when the second node determines the time slot 13 is not received correctly to the first node in the data transmission time slot 3, the P ₂ comprises slots 13 The scheduling information is the same as the scheduling information of slot 3.

Optionally, the scheduling information of the fourth time slot included in the third scheduling information is indicated by an identifier; when the identifier is the first identifier, the fourth information included in the third scheduling information The scheduling information of the time slot is information of the scheduling resource reserved by the first node for the fourth time slot in the first scheduling information; when the identifier is the second identifier, the third scheduling information The scheduling information of the fourth time slot included in the same is the same as the scheduling information of the third time slot.

For a detailed description of the first identifier and the second identifier, reference may be made to the above, and details are not described herein again.

Optionally, the method further includes:

31) The first node sends a downlink reference signal to the second node in a fourth downlink time slot;

32) The second node receives a downlink reference signal that is sent by the first node in a fourth downlink time slot;

33. The second node demodulates data sent by the first node in the at least one downlink time slot after the fourth downlink time slot and the fourth downlink time slot according to the downlink reference signal.

The start time of the fourth downlink time slot and the fourth downlink time slot The length of time between the end time of the latest time slot in the at least one downlink time slot is less than or equal to the preset threshold.

Optionally, the method further includes:

41) The second node sends an uplink reference signal to the first node in a first uplink time slot.

42) The first node receives an uplink reference signal sent by the second node in a first uplink time slot;

43) The first node demodulates data sent by the second node in the first uplink time slot and at least one uplink time slot after the first uplink time slot according to the uplink reference signal.

The length of time between the start time of the first uplink time slot and the end time of the latest time slot of the end time in the at least one uplink time slot after the first uplink time slot is less than or equal to the Preset threshold.

In the prior art, the first node carries the downlink reference signal when transmitting data, and the second node carries the uplink reference signal when transmitting the data. Therefore, the reference signal is in each uplink and downlink subframe. In the foregoing two optional methods, the downlink reference signal sent by the first node may be used by the second node to demodulate the multiple data sent by the first node, and the uplink reference signal sent by the second node may be used by the first node pair. The plurality of data sent by the second node are demodulated, thereby greatly reducing the number of downlink reference signals sent by the first node and the uplink reference signals sent by the second node, saving resources, increasing network throughput, and improving Spectral efficiency.

When the foregoing optional method is implemented, the downlink reference signal DRS _x sent by the first node on the downlink time slot _x may be used by the second node to the first node in the downlink time slot x and the downlink time slot x and the downlink time slot. The data sent on the downlink time slot between y is demodulated, and the first node sends the downlink reference signal DRS _y in the downlink time slot _y , and the DRS _y is the first downlink reference signal sent after the first node sends the DRS _x ; The uplink reference signal URS _p sent by the two nodes on the uplink time slot p can be used for data sent by the first node to the uplink time slot of the second node in the uplink time slot p and the uplink time slot p and the uplink time slot q. Demodulation, the second node sends an uplink reference signal URS _q in the uplink time slot q, and the URS _q is the first uplink reference signal sent after the first node sends the URS _p .

Exemplarily, as shown in FIG. 6, the first node may send a downlink reference signal DRS ₁ to the second node in slot 0 of each frame, and DRS ₁ may be used for the second node to the first node at time slot 0 to The data sent by the downlink time slot in the slot 19 is demodulated, and the second node may send the uplink reference signal URS ₁ to the first node in the time slot 4 of each frame, and the URS ₁ may be used for the first node to the second node at the time. The data transmitted from the slot 4 to the uplink slot in slot 4 of the next frame is demodulated.

For another example, as shown in FIG. 7, in the time slot 10 to the time slot 19, the downlink reference signal DRS ₁ sent by the first node to the second node in the time slot 10 can be used for the second node to the first node in the time slot. The data transmitted by the downlink time slot in the time slot 10 is demodulated; the uplink reference signal URS ₁ transmitted by the second node to the first node in the time slot 14 can be used for the first node to the second node in the time slot 14 to The data transmitted in the uplink slot in slot 4 of the next frame is demodulated.

As shown in FIG. 7, since each frame and the next frame are consecutive, in the frame configuration in FIG. 7, the frame configuration is periodically repeated in the frame configuration of slot 0 to slot 9, and the first node is also in The scheduling information and the reference signal are periodically transmitted. Although the scheduling information sent in each period is different from the information contained in the reference signal, for the convenience of description, the same scheduling information and reference signal are used, for example, in In one frame shown in FIG. 7, the scheduling information transmitted by the first node in slot 0 and slot 10 is represented as P ₁ . The same is true in Figure 8.

Optionally, when the first node determines that the first data is correctly received in the second downlink time slot, the first node demodulates the first node by using an uplink reference signal of the second time slot. Two data, the uplink reference signal of the second time slot is a last uplink reference signal sent by the second node before the first time slot after the second time slot; when the first node is in the Determining that the second downlink time slot does not correctly receive the first When a data is used, the first node demodulates the second data by using an uplink reference signal used when demodulating the first data.

It should be noted that when the first node determines that the first data is correctly received in the second downlink time slot, and the second node determines that the first node correctly receives the first data, the second node newly transmits data in the second time slot. That is, the first data and the second data are different data. In this case, the first node demodulates the second data by using the uplink reference signal of the second time slot; when the first node determines that the second downlink time slot is not correctly received. When the first data is determined, and the second node determines that the first node does not correctly receive the first data, the second node retransmits the data in the second time slot, that is, the first data and the second data are substantially the same data, In the case, the first node demodulates the second data by using an uplink reference signal used when demodulating the first data.

Optionally, the method further includes: when the second node correctly receives the third data, the second node demodulates the fourth data by using a downlink reference signal of the fourth time slot, The downlink reference signal of the fourth time slot is the last downlink reference signal sent by the first node before the first time slot after the fourth time slot; when the second node does not correctly receive the When the third data is described, the second node demodulates the fourth data by using a downlink reference signal used when demodulating the third data.

It should be noted that when the second node correctly receives the third data, and the first node determines that the second node correctly receives the third data, the first node newly transmits data in the fourth time slot, that is, the third data and the third data. The fourth data is different data. In this case, the second node demodulates the fourth data by using the downlink reference signal of the fourth time slot, when the second node does not correctly receive the third data, and the first node determines that the second node is not When the third data is correctly received, the first node retransmits the data in the fourth time slot, that is, the third data and the fourth data are substantially the same data. In this case, the second node adopts the method of demodulating the third data. The downlink reference signal demodulates the fourth data.

The method provided by the embodiment of the present invention is exemplarily described below by using several different TDD frame configurations. Specifically, based on the examples described in FIG. 9 to FIG. 11 , the coherence of the channel between the first node and the second node is used. The time is greater than or equal to 5ms as an example for explanation.

As shown in FIG. 9 , which is a schematic diagram of scheduling in the case of another TDD frame configuration of 0.5 ms TTI, the first frame and the second frame are shown. In each frame, the first node is in slot 0. The two nodes send scheduling information P ₁ , and send scheduling information P ₂ to the second node in time slot 10, where P ₁ includes scheduling information of slot 0 to slot 9, and P ₂ includes slot 10 to slot 19 Scheduling information.

In this case, since the time slot 10 to the time slot 19 are both downlink time slots, P ₂ includes only the scheduling information of the downlink time slot. In the uplink process 0, the time interval between the time slot 0 in the second frame and the time slot 4 in the first frame is greater than 1.5 ms, and therefore, the first node transmits the P ₁ in the time slot 0 in the second frame. The scheduling information of the slot 4 in the second frame included in the information is the information of the scheduling resource that the first node reassigns for the slot 4. The same information, in a first frame slot scheduling information in the first node P ₁ in a first frame slot 0 transmits 4 may comprise a slot 4 for the reallocated resources scheduled for the first node . The other upstream processes are the same.

In the downlink process 0, the time interval between the time slot 0 in the second frame and the time slot 8 in the first frame is greater than 1.5 ms, and therefore, the first node transmits the P ₁ in the time slot 0 in the second frame. The scheduling information of the slot 0 in the second frame included in the second frame is the information of the scheduling resource that the first node reassigns for the slot 0. Similarly information, schedule information of the first slot in the first frame P ₁ point in a first frame slot 0 included in the transmission may be 0 slot 0 for scheduling resources reallocated to the first node . Downstream process 1 to downlink process 3 are the same.

In the downlink process 4, the time interval between the time slot 10 in the first frame and the time slot 4 in the first frame is greater than 1.5 ms, and therefore, the first node transmits the P ₂ in the time slot 10 in the first frame. The scheduling information of the time slot 10 in the first frame included in the first frame may be information of the scheduling resource that the first node re-allocates for the time slot 10. Downstream process 5 to downlink process 13 are the same.

In addition, in the first frame, the second node may send an uplink reference signal URS ₁ to the first node in the time slot 4, and the URS _{1 is} used by the first node to perform data sent by the second node in the time slot 4 to the time slot 9. demodulation. The first node may send a downlink reference signal DRS ₁ to the second node at time slot 0, and send a downlink reference signal DRS ₂ to the second node at time slot 10, where DRS _{1 is} used for the second node to the first node in the time slot. The data transmitted from 0 to time slot 3 is demodulated, and the DRS _{2 is} used by the second node to demodulate the data transmitted by the first node in time slot 10 to time slot 19, and other frames are similar. It should be noted that the scheduling information sent by the first node on the same time slot of different frames may be the same or different. The embodiment of the present invention is called the same scheduling information for the convenience of description. For example, P ₁ and first nodes in a first frame slot 0 slot 0 transmitted in the second frame P ₁ of the transmission may be the same or different. The reference signal sent by the first node or the second node is the same.

In the frame configuration, if a method in the prior art is used, in a frame, the first node needs to send scheduling information on 14 downlink time slots, and send an uplink reference signal on each uplink time slot, in each frame. The downlink reference signal is sent on the downlink time slot. After the method provided by the embodiment of the present invention, the first node only needs to send scheduling information on two downlink time slots, and only needs to send an uplink reference signal on one uplink time slot and send downlink on two downlink time slots. The reference signal shows that the method provided by the embodiment of the present invention can greatly reduce the overhead.

As shown in FIG. 10, it is a scheduling diagram in the case of another TDD frame configuration of 0.5 ms TTI, in which the first node sends scheduling information P ₁ to the second node in slot 0, and to the second node in slot 10. The scheduling information P _{4 is} transmitted, wherein P ₁ includes scheduling information of slot 0 to slot 9 , and P ₄ includes scheduling information of slot 10 to slot 19 .

In the process of scheduling the time slot 0 to the time slot 9 by the first node, in the uplink process 0, the time interval between the time slot 0 and the time slot 14 in the previous frame is greater than 1.5 ms, therefore, in P ₁ The scheduling information of the time slot 4 included is the information of the scheduling resource re-allocated by the first node for the time slot 4, and the uplink process 1 and the uplink process 2 are the same.

In the uplink process 3, the time interval between the time slot 0 and the time slot 17 in the previous frame is less than 1.5 ms, and the first node cannot determine whether the second node is correctly received in the time slot of the previous frame in the time slot 0. 17 transmits the data, therefore, P ₁ included in the time slot schedule information 7 is the information node 7 time slots reserved resource scheduling. Since the time interval between slot 1, slot 2 and slot 3 and slot 17 in the previous frame is not less than 1.5 ms, that is, in slot 1, slot 2 or slot 3, the first node can determine Whether the data sent by the second node in the time slot 17 of the previous frame is correctly received, therefore, the first node may send P ₂ to the second node in time slot 1, time slot 2 or time slot 3, and P ₂ includes uplink Scheduling information for slot 7 of process 3. Specifically, when the first node sends P ₂ to the second node in slot 1, if the first node determines in slot 1 that the data sent by the second node in slot 17 of the previous frame is correctly received, then P ₂ scheduling information included in the slot 7 of the slot 7 P ₁ is information reserved resource scheduling; if the first node determines a time slot to the second node is not received correctly in the time slot of a frame 17 The transmitted data, the scheduling information of slot 7 included in P ₂ is the same as the scheduling information of slot 17 in the previous frame.

In the downlink process 0, the time interval between the time slot 0 and the time slot 15 in the previous frame is greater than 1.5 ms, and the first node can determine in the time slot 0 whether the second node correctly receives the first node in the previous frame. The time slot 10 in the data transmitted to the second node, therefore, the scheduling information of the time slot 0 included in the P ₁ is the information of the scheduling resource re-allocated by the first node for the time slot 0, and the downlink process 1 and the downlink process 2 are the same. Reason.

In the downlink process 3, the time interval between the time slot 0 and the time slot 17 in the previous frame is less than 1.5 ms, and the first node cannot determine in the time slot 0 whether the second node correctly receives the first node in the previous frame. data slots transmitted to the second node 13, and therefore, P ₁ included in the time slot schedule information for the node 3 is 3 slot information reserved resource scheduling. Since the time interval between the time slot 1 and the time slot 17 in the previous frame is not less than 1.5 ms, the information of the scheduling resource of the time slot 3 may also be included in the P ₂ , specifically, if the first node is in the time slot. a second node for receiving a correctly transmitted data slot 13 on a first node of the P time slot scheduling information included in the ₂ to 3 in slot 3 P ₁ is reserved resource scheduling Information; if the first node determines in slot 1 that the second node does not correctly receive the data sent by the first node in the slot 13 in the previous frame, the scheduling information of the slot 3 included in P ₂ is the same as the previous frame. The scheduling information of the slot 13 in the same is the same.

In the downlink process 4, since the first node has not received the reply sent by the second node at the time slot 0, the reply is a reply of the data sent by the first node to the second node in the time slot 18 in the previous frame. The first node cannot determine in the time slot 0 whether the second node correctly receives the data sent by the first node in the time slot 18 of the previous frame. Similarly, in the downlink process 5, the first node cannot determine in the slot 0 whether the second node correctly receives the data sent by the first node in the time slot 19 in the previous frame. In this case, P ₁ scheduling information included in a downlink timeslot 4 processes the downlink scheduling information and process slots 5 8 9 point information for the first resource scheduling slot 8 and slot 9 reserved. The first node receives the reply sent by the second node at time slot 4. Since the time interval between time slot 4 and time slot 8 is not less than 1.5 ms, the first node may send the time slot 8 to the second node. P ₃ and P ₃ include scheduling information of the slot 8 of the downlink process 4 and scheduling information of the slot 9 of the downlink process 5.

Specifically, when the first node a second node to the first node correctly receives the data transmitted on a timeslot 18 (slot 19), 8 (9 slots) P ₃ in comprising scheduling a time slot P ₁ is the information 8 (9 slots) reserved resource scheduling information of the time slot, when the first node a second node to the first node is not received correctly in the time slot 18 on one frame (19 slots ) data transmitted, P ₃ in comprising 8 slots (slot 9) of the slot 18 and the scheduling information (slot 19) on one of the same scheduling information.

The scheduling information of the time slots included in P ₂ and P ₃ can be represented by the value of the bit.

In addition, the second node may send an uplink reference signal URS ₁ to the first node in time slot 4, and the URS _{1 is} used by the first node to demodulate the data sent by the second node in the time slot 4 to the time slot 7. The first node may send a downlink reference signal DRS ₁ to the second node in slot 0, and the DRS _{1 is} used by the second node to perform data sent by the first node in slot 0 to slot 3 and slot 8 to slot 9. demodulation.

The process of scheduling the time slot 10 to the time slot 19 by the first node is the same as the process of scheduling the time slot 0 to the time slot 9. For details, refer to the above.

In the frame configuration, if the method in the prior art is adopted, the first node needs to be at 12 The scheduling information is sent on the downlink time slots, the uplink reference signal is sent on each uplink time slot, and the downlink reference signal is sent on each downlink time slot. After the method provided by the embodiment of the present invention, the first node only needs to send scheduling information on six downlink time slots, and only needs to send uplink reference signals on two uplink time slots, and send on two downlink time slots. As shown in the downlink reference signal, the method provided by the embodiment of the present invention can greatly reduce the overhead.

As shown in FIG. 11, the scheduling diagram in the case of another TDD frame configuration of 0.5 ms TTI, the first node sends scheduling information P ₁ to the second node in slot 0, and sends a scheduling to the second node in slot 10. Information P ₃ , wherein P ₁ includes scheduling information of slot 0 to slot 9 , and P ₃ includes scheduling information of slot 10 to slot 19 .

In this case, since the slots 10 are downlink time slot to time slot 19, and therefore, P ₃ only scheduling information includes downlink slot. In the upstream process 0, the time slot between 0 and 4 time slots in the previous frame interval is greater than 1.5ms, therefore, the first node in the scheduling information transmitted in slot 0 P ₁ is included in the time slot 4 The first node is information of the scheduling resource reallocated by the time slot 4. The other upstream processes are the same.

In the downlink process 0, the time slot between 0 and 7 in a 1.5ms interval is greater than one time slot, therefore, the first node scheduling information transmitted in the P 0 slot ₁ slot 0 is included The first node is information of the scheduling resource reallocated by the time slot 0. Downstream process 1 to downlink process 3 are the same.

In the downlink process 4, since the first node does not receive the reply sent by the second node at time slot 0, the reply is a reply of the data sent by the first node in the time slot 8 in the previous frame, therefore, the first The node cannot determine at time slot 0 whether the second node correctly received the data sent by the first node in slot 8 of the previous frame. Similarly, in the downlink process 5, the first node cannot determine at the time slot 0 whether the second node correctly received the data sent by the first node in the time slot 9 in the previous frame. In this case, P ₁ scheduling information included in a downlink timeslot 4 processes the downlink scheduling information and process slots 5 8 9 point information for the first resource scheduling slot 8 and slot 9 reserved. Therefore, the first node may send P ₂ to the second node in time slot 8, and the scheduling information of the time slot 8 of the downlink process 4 and the time slot 9 of the downlink process 5 is included in the P ₂ .

Specifically, when the first node determines that the second node correctly receives the data sent by the first node in slot 8 (slot 9) in the previous frame, the scheduling of slot 8 (slot 9) included in P ₂ P ₁ is the information 8 (9 slots) reserved resource scheduling information of the time slot, when the first node a second node to the first node is not received correctly in the time slot of a frame 8 (slot 9 The transmitted data, the scheduling information of slot 8 (slot 9) included in P ₂ is the same as the scheduling information of slot 8 (slot 9) in the previous frame.

The scheduling information of the time slot 8 of the downlink process 4 and the time slot 9 of the downlink process 5 included in P ₂ can be represented by the value of two bits.

Process 6 In the downlink, time slot 10 between 1.5ms interval is greater than 4 slots, therefore, the first node P ₃ in scheduling information transmitted in the slot 10 includes a slot 10 for the first node The information of the scheduling resource re-allocated in time slot 10. Downstream process 7 to downlink process 15 are the same.

In addition, the second node may send an uplink reference signal URS ₁ to the first node in time slot 4, and the URS _{1 is} used by the first node to demodulate the data sent by the second node in the time slot 4 to the time slot 7. The first node may send a downlink reference signal DRS ₁ to the second node at time slot 0, and send a downlink reference signal DRS ₂ to the second node at time slot 10, where DRS _{1 is} used for the second node to the first node in the time slot. The data transmitted from 0 to 3 and the time slot 8 to time slot 9 are demodulated, and the DRS _{2 is} used by the second node to demodulate the data transmitted by the first node in the time slot 10 to the time slot 19.

In the frame configuration, if the method in the prior art is used, the first node needs to send scheduling information on 16 downlink time slots, send an uplink reference signal on each uplink time slot, and send on each downlink time slot. Downlink reference signal. After the method provided by the embodiment of the present invention, the first node only needs to send scheduling information on three downlink time slots, and only needs to send an uplink reference signal on one uplink time slot and send downlink on two downlink time slots. The reference signal shows that the method provided by the embodiment of the present invention can greatly reduce the opening. pin.

In the above description, if the time slot mentioned is not explicitly indicated as the time slot in which frame, it refers to the time slot in the frame configuration shown in the drawing. Correspondingly, the "previous frame" refers to the drawing. The last frame of a frame shown in .

The method provided by the embodiment of the present invention does not limit the number of the scheduling information, the downlink reference signal, and the uplink reference signal sent by the second node, and may be determined according to the speed of the channel change. When the channel changes rapidly, the number of scheduling information, uplink reference signals, and downlink reference signals may be larger. When the channel changes slowly, the number of scheduling information, uplink reference signals, and downlink reference signals may be smaller.

The embodiment of the present invention further provides a first node 120 for performing the method shown in FIG. 4. As shown in FIG. 12, the first node 120 includes:

a determining unit 1201, configured to determine first scheduling information, where the first scheduling information includes scheduling information of each time slot in a specific time slot, where the specific time slot includes a first downlink time slot and the first At least one time slot after the downlink time slot;

The first sending unit 1202 is configured to send the first scheduling information to the second node in the first downlink time slot;

The coherence time of the channel between the first node and the second node is greater than or equal to a preset threshold, and the start time of the first downlink time slot and the end time of the specific time slot are the most The length of time between the end times of the late time slots is less than or equal to the predetermined threshold.

Optionally, in an uplink hybrid automatic repeat request HARQ process, when the first node fails to determine whether the first data is correctly received in the first downlink time slot, and the first node is in the second The downlink time slot can determine whether the first data is correctly received,

The first sending unit 1202 is further configured to: in the second downlink time slot The second node sends the second scheduling information, where the scheduling information of the second time slot included in the second scheduling information is scheduling information according to the second node sending the second data on the second time slot;

When the first node determines that the first data is correctly received in the second downlink time slot, the scheduling information of the second time slot included in the second scheduling information is that the first node is And the information about the scheduling resource reserved for the second time slot in the first scheduling information; or, when the first node determines that the first data is not correctly received in the second downlink time slot, The scheduling information of the second time slot included in the second scheduling information is the same as the scheduling information of the first time slot;

The second time slot belongs to the specific time slot, the first data is data sent by the second node to the first node in the first time slot, and the second data is The first data that is sent by the second node after sending the first data, and the second downlink time slot is before the second time slot.

Optionally, in a downlink HARQ process, when the first node is in the first downlink time slot, it is not determined whether the second node correctly receives the third data, and the first node is in the third The downlink time slot can determine whether the second node correctly receives the third data,

The first sending unit 1202 is further configured to send third scheduling information to the second node in the third downlink time slot, where scheduling information of the fourth time slot included in the third scheduling information is The scheduling information on which the second node receives the fourth data on the fourth time slot;

When the first node determines that the second node correctly receives the third data in the third downlink time slot, the scheduling information of the fourth time slot included in the third scheduling information is Decoding, by the first node, the scheduling resource reserved for the fourth time slot in the first scheduling information; or, when the first node determines, in the third downlink time slot, the second node is not When the third data is correctly received, the scheduling information of the fourth time slot included in the third scheduling information is the same as the scheduling information of the third time slot;

The fourth time slot belongs to the specific time slot, the first node sends the third data to the second node in the third time slot, and the fourth data is the first time slot. And transmitting, by the node, the first data sent after the third data, where the third downlink time slot is before the fourth time slot or the third downlink time slot is the fourth time slot.

Optionally, as shown in FIG. 13, the first node 120 further includes:

The second sending unit 1203 is configured to send a downlink reference signal to the second node in the fourth downlink time slot.

Optionally, as shown in FIG. 13, the first node 120 further includes:

The receiving unit 1204 is configured to receive an uplink reference signal that is sent by the second node in the first uplink time slot.

The demodulation unit 1205 is configured to demodulate, according to the uplink reference signal, data sent by the second node in the first uplink time slot and at least one uplink time slot after the first uplink time slot;

It should be noted that the first node in this embodiment is a base station, where the receiving unit may be a receiver of the base station, and the sending unit may be a transmitter of the base station; in addition, the receiving unit and the sending unit may also be integrated to form a base station. The transceiver of the base station. The determining unit and the demodulating unit may be separate processors or integrated in one of the base stations. The processor described herein may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated systems configured to implement embodiments of the present invention. Circuit.

The first node provided in the embodiment of the present invention can be applied in an application scenario in which the channel changes smoothly. For example, in a wireless backhaul scenario, the first node is a macro base station, and the relative position between the macro base station and the small base station is fixed, so that the channel change between the macro base station and the small base station is gentle, and the signal is The channel is in a stable state for a long period of time. In this case, the first node can schedule more time slots at a time, that is, the scheduling information sent by the first node to the second node may include multiple time slots. Scheduling information, such that in a frame, the first node only needs to send a small amount of scheduling information to schedule the time slots in one frame. Compared with the prior art, the first node does not need to be in each downlink. The slots all send scheduling information, which greatly reduces the overhead of the network system.

In hardware implementation, each unit in the first node 120 may be embedded in the hardware of the first node 120 in hardware or may be stored in the memory of the first node 120 in software for processing. The device invokes operations corresponding to the various units above, which may be a CPU, an ASIC, or one or more integrated circuits configured to implement embodiments of the present invention.

As shown in Figure 14, the embodiment of the present invention further provides a first node 140 for performing the method shown in Figure 4, the first node 140 includes: a processor 1401 and a transmitter 1402;

The processor 1401 is configured to determine first scheduling information, where the first scheduling information includes scheduling information of each time slot in a specific time slot, where the specific time slot includes a first downlink time slot and the first At least one time slot after the downlink time slot;

The transmitter 1402 is configured to send the first scheduling information to the second node in the first downlink time slot;

The transmitter 1402 is further configured to: in the second downlink time slot, to the second node Transmitting the second scheduling information, where the scheduling information of the second time slot included in the second scheduling information is scheduling information according to the second node sending the second data on the second time slot;

The transmitter 1402 is further configured to send third scheduling information to the second node in the third downlink time slot, where scheduling information of the fourth time slot included in the third scheduling information is the second The scheduling information on which the node receives the fourth data on the fourth time slot;

Optionally, the transmitter 1402 is further configured to send a downlink reference signal to the second node in the fourth downlink time slot.

Optionally, as shown in FIG. 15, the first node 140 further includes:

The receiver 1403 is configured to receive an uplink reference signal that is sent by the second node in the first uplink time slot.

The processor 1401 is further configured to demodulate data sent by the second node in the first uplink time slot and at least one uplink time slot after the first uplink time slot according to the uplink reference signal. ;

The first node provided in the embodiment of the present invention can be applied in an application scenario in which the channel changes smoothly. For example, in a wireless backhaul scenario, the first node is a macro base station, and the relative position between the macro base station and the small base station is fixed, so that the channel change between the macro base station and the small base station is gentle, and the channel is in a long period of time. a steady state, in which case the first node can schedule more time slots at a time, that is, the scheduling information sent by the first node to the second node may include scheduling information of multiple time slots, such that one frame The first node only needs to send a small amount of scheduling information to schedule the time slots in one frame. Compared with the prior art, the first node does not need to send scheduling information in each downlink time slot, which greatly reduces The overhead of the network system.

The embodiment of the present invention further provides a second node 160 for performing the method shown in FIG. 4. As shown in FIG. 16, the second node 160 includes:

The first receiving unit 1601 is configured to receive, by the first node, the first downlink time slot. First scheduling information;

The transceiver unit 1602 is configured to send or receive data on a time slot in the specific time slot according to scheduling information of a specific time slot included in the first scheduling information, where the specific time slot includes the first a downlink time slot and at least one time slot subsequent to the first downlink time slot;

Optionally, the first receiving unit 1601 is further configured to receive second scheduling information that is sent by the first node in a second downlink time slot.

The transceiver unit 1602 is further configured to send, according to the scheduling information of the second time slot included in the second scheduling information, the second data on the second time slot;

The second time slot belongs to the specific time slot, and the second downlink time slot is before the second time slot, when the first node determines that the second downlink time slot is correctly received. When the data is in use, the scheduling information of the second time slot included in the second scheduling information is information about scheduling resources reserved by the first node for the second time slot in the first scheduling information. Or when the first node determines that the first data is not correctly received in the second downlink time slot, scheduling information of the second time slot included in the second scheduling information is first The scheduling information of the time slot is the same, and the second node sends the first data in the first time slot.

Optionally, the first receiving unit 1601 is further configured to receive third scheduling information that is sent by the first node in a third downlink time slot.

The transceiver unit 1602 is further configured to receive fourth data on the fourth time slot according to scheduling information of a fourth time slot included in the third scheduling information;

The fourth time slot belongs to the specific time slot, the third downlink time slot is before the fourth time slot or the third downlink time slot is the fourth time slot, when When the first node determines that the second node correctly receives the third data in the third downlink time slot, the scheduling information of the fourth time slot included in the third scheduling information is that the first node is And the information about the scheduling resource reserved for the fourth time slot in the first scheduling information; or, when the first node determines, in the third downlink time slot, that the second node does not correctly receive the In the third data, the scheduling information of the fourth time slot included in the third scheduling information is the same as the scheduling information of the third time slot, and the first node is in the third time slot to the second time slot. The node transmits the third data.

Optionally, as shown in FIG. 17, the second node 160 further includes:

a second receiving unit 1603, configured to receive a downlink reference signal that is sent by the first node in a fourth downlink time slot;

The demodulation unit 1604 is configured to demodulate data sent by the first node in the at least one downlink time slot after the fourth downlink time slot and the fourth downlink time slot according to the downlink reference signal;

The length of time between the start time of the fourth downlink time slot and the end time of the latest time slot of the end time in the at least one downlink time slot after the fourth downlink time slot is less than or equal to the Preset threshold.

Optionally, as shown in FIG. 17, the second node 160 further includes:

The sending unit 1605 is configured to send an uplink reference signal to the first node in the first uplink time slot.

It should be noted that the second node in this embodiment is a base station or a UE. When the second node is a base station, the receiving unit may be a receiver of the base station, the sending unit may be a transmitter of the base station, and the transceiver unit may be a base station. Transceiver. When the second node is a UE, both the receiving unit and the sending unit may be a radio frequency (RF) circuit of the UE, and the functions of the determining unit and the demodulating unit may be completed by the processor of the UE. The processor described herein can be a CPU, or an ASIC, or one or more integrated circuits configured to implement embodiments of the present invention.

The second node provided by the embodiment of the present invention can be applied to applications with stable channel changes. In the scene. For example, in a wireless backhaul scenario, the second node is a small base station, and the relative position between the macro base station and the small base station is fixed, so that the channel change between the macro base station and the small base station is gentle, and the channel is in a long period of time. a stable state, in which case the first node can schedule more time slots at a time, that is, the scheduling information sent by the first node to the second node may include scheduling information of multiple time slots, and the second node may be configured according to The scheduling information sent by the first node sends or receives data in time slots in multiple time slots, so that in one frame, the first node only needs to send a small amount of scheduling information to schedule the time slots in one frame. Compared with the prior art, the first node does not need to send scheduling information in each downlink time slot, which greatly reduces the overhead of the network system.

In hardware implementation, each unit in the second node 160 may be embedded in hardware or in a processor independent of the second node 160, or may be stored in software in the memory of the second node 160 for processing. The device invokes operations corresponding to the various units above, which may be a CPU, an ASIC, or one or more integrated circuits configured to implement embodiments of the present invention.

As shown in FIG. 18, the embodiment of the present invention further provides a second node 180 for performing the method shown in FIG. 4, the second node 180 includes: a transceiver 1801 and a processor 1802;

The transceiver 1801 is configured to receive first scheduling information that is sent by the first node in the first downlink time slot.

The processor 1802 is configured to determine scheduling information of a specific time slot included in the first scheduling information;

The transceiver 1801 is further configured to send or receive data on a time slot in the specific time slot according to scheduling information of a specific time slot included in the first scheduling information determined by the processor 1802; The specific time slot includes the first downlink time slot and at least one time slot after the first downlink time slot;

The coherence time of the channel between the first node and the second node is greater than or equal to a preset threshold, the start time of the first downlink time slot and the specific time slot. The length of time between the end times of the latest time slots in the end time is less than or equal to the preset threshold.

Optionally, the transceiver 1801 is further configured to receive second scheduling information that is sent by the first node in a second downlink time slot.

The processor 1802 is further configured to determine scheduling information of a second time slot included in the second scheduling information;

The transceiver 1801 is further configured to send, according to the scheduling information of the second time slot included in the second scheduling information determined by the processor 1802, the second data on the second time slot;

Optionally, the transceiver 1801 is further configured to receive third scheduling information that is sent by the first node in a third downlink time slot.

The processor 1802 is further configured to determine scheduling information of a fourth time slot included in the third scheduling information;

The transceiver 1801 is further configured to receive fourth data on the fourth time slot according to scheduling information of a fourth time slot included in the third scheduling information determined by the processor 1802;

The fourth time slot belongs to the specific time slot, the third downlink time slot is before the fourth time slot or the third downlink time slot is the fourth time slot, when the first time slot Determining, by the node, the third node correctly receiving the third number in the third downlink time slot The scheduling information of the fourth time slot included in the third scheduling information is information of the scheduling resource reserved by the first node for the fourth time slot in the first scheduling information. Or, when the first node determines, in the third downlink time slot, that the second node does not correctly receive the third data, scheduling of the fourth time slot included in the third scheduling information The information is the same as the scheduling information of the third time slot, and the first node sends the third data to the second node in the third time slot.

Optionally, the transceiver 1801 is further configured to receive a downlink reference signal that is sent by the first node in a fourth downlink time slot.

The processor 1802 is further configured to demodulate data sent by the first node in the at least one downlink time slot after the fourth downlink time slot and the fourth downlink time slot according to the downlink reference signal. ;

Optionally, the transceiver 1801 is further configured to send an uplink reference signal to the first node in the first uplink time slot.

The second node provided by the embodiment of the present invention can be applied to an application scenario in which the channel changes smoothly. For example, in a wireless backhaul scenario, the second node is a small base station, and the relative position between the macro base station and the small base station is fixed, so that the channel change between the macro base station and the small base station is gentle, and the channel is in a long period of time. a stable state, in which case the first node can schedule more time slots at a time, that is, the scheduling information sent by the first node to the second node may include scheduling information of multiple time slots, and the second node may be configured according to The scheduling information sent by the first node sends or receives data in each of the plurality of time slots, so that in one frame, the first node only needs to send a small amount of scheduling information to be able to time slots in one frame. The scheduling is performed. Compared with the prior art, the first node does not need to send scheduling information in each downlink time slot, which greatly reduces the overhead of the network system.

An embodiment of the present invention further provides a scheduling system, including: the foregoing first node 120 And the second node 160, or the first node 140 and the second node 180.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the modules is only a logical function division. In actual implementation, there may be another division manner, for example, multiple modules or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.

The modules described as separate components may or may not be physically separated. The components displayed as modules may or may not be physical modules, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or two or more modules may be integrated into one module. The above integrated modules can be implemented in the form of hardware or in the form of hardware plus software function modules.

The above-described integrated modules implemented in the form of software function modules can be stored in a computer readable storage medium. The software functional modules described above are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform some of the steps of the methods described in various embodiments of the present invention. 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, and the program code can be stored. Medium.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not limited thereto; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that Modifications to the technical solutions described in the foregoing embodiments, or equivalent replacement of some of the technical features; The modifications and substitutions of the present invention do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

A scheduling method, wherein when the coherence time of the channel between the first node and the second node is greater than or equal to a preset threshold, the method includes:

Determining, by the first node, first scheduling information, where the first scheduling information includes scheduling information of each time slot in a specific time slot, where the specific time slot includes a first downlink time slot and the first downlink time slot At least one time slot after the time slot;

Sending, by the first node, the first scheduling information to the second node in the first downlink time slot;

The length of time between the start time of the first downlink time slot and the end time of the latest time slot of the end time slot in the specific time slot is less than or equal to the preset threshold.
The method according to claim 1, wherein in the uplink hybrid automatic repeat request HARQ process, when the first node cannot determine whether the first data is correctly received in the first downlink time slot, And the method, when the first node is able to determine whether the first data is correctly received, in the second downlink time slot, the method further includes:

The first node sends second scheduling information to the second node in the second downlink time slot, and the scheduling information of the second time slot included in the second scheduling information is that the second node is in the Scheduling information on which the second data is transmitted on the second time slot;

When the first node determines that the first data is correctly received in the second downlink time slot, the scheduling information of the second time slot included in the second scheduling information is that the first node is And the information about the scheduling resource reserved for the second time slot in the first scheduling information; or, when the first node determines that the first data is not correctly received in the second downlink time slot, The scheduling information of the second time slot included in the second scheduling information is the same as the scheduling information of the first time slot;

The second time slot belongs to the specific time slot, the first data is data sent by the second node to the first node in the first time slot, and the second data is The first data that is sent by the second node after sending the first data, and the second downlink time slot is before the second time slot.
The method according to claim 1 or 2, wherein, in a downlink HARQ process, when the first node fails to determine, in the first downlink time slot, whether the second node correctly receives the third And the method further includes: when the first node is configured to determine whether the second node correctly receives the third data in the third downlink time slot, the method further includes:

The first node sends third scheduling information to the second node in the third downlink time slot, and the scheduling information of the fourth time slot included in the third scheduling information is that the second node is in the Scheduling information on which the fourth data is received on the fourth time slot;

When the first node determines that the second node correctly receives the third data in the third downlink time slot, the scheduling information of the fourth time slot included in the third scheduling information is Decoding, by the first node, the scheduling resource reserved for the fourth time slot in the first scheduling information; or, when the first node determines, in the third downlink time slot, the second node is not When the third data is correctly received, the scheduling information of the fourth time slot included in the third scheduling information is the same as the scheduling information of the third time slot;

The fourth time slot belongs to the specific time slot, the first node sends the third data to the second node in the third time slot, and the fourth data is the first time slot. And transmitting, by the node, the first data sent after the third data, where the third downlink time slot is before the fourth time slot or the third downlink time slot is the fourth time slot.
The method according to any one of claims 1 to 3, wherein the method further comprises:

The first node sends a downlink reference signal to the second node in a fourth downlink time slot.
The method according to any one of claims 1 to 4, wherein the method further comprises:

The first node receives an uplink reference signal sent by the second node in a first uplink time slot;

Determining, by the first node, the second node according to the uplink reference signal Demodulating data sent by an uplink time slot and at least one uplink time slot after the first uplink time slot;

The length of time between the start time of the first uplink time slot and the end time of the latest time slot of the end time in the at least one uplink time slot after the first uplink time slot is less than or equal to the Preset threshold.
A scheduling method, wherein when the coherence time of the channel between the first node and the second node is greater than or equal to a preset threshold, the method includes:

Receiving, by the second node, first scheduling information that is sent by the first node in a first downlink time slot;

The second node sends or receives data on a time slot in the specific time slot according to scheduling information of a specific time slot included in the first scheduling information; wherein the specific time slot includes the first a row slot and at least one slot subsequent to the first downlink slot;

The length of time between the start time of the first downlink time slot and the end time of the latest time slot of the end time slot in the specific time slot is less than or equal to the preset threshold.
The method of claim 6 wherein the method further comprises:

Receiving, by the second node, second scheduling information that is sent by the first node in a second downlink time slot;

The second node sends the second data on the second time slot according to the scheduling information of the second time slot included in the second scheduling information;

The second time slot belongs to the specific time slot, and the second downlink time slot is before the second time slot, when the first node determines that the second downlink time slot is correctly received. When the data is in use, the scheduling information of the second time slot included in the second scheduling information is information about scheduling resources reserved by the first node for the second time slot in the first scheduling information. Or when the first node determines that the first data is not correctly received in the second downlink time slot, scheduling information of the second time slot included in the second scheduling information is first The scheduling information of the time slot is the same, and the second node sends the first data in the first time slot.
The method according to claim 6 or 7, wherein the method further comprises:

Receiving, by the second node, third scheduling information that is sent by the first node in a third downlink time slot;

The second node receives fourth data on the fourth time slot according to scheduling information of a fourth time slot included in the third scheduling information;

The fourth time slot belongs to the specific time slot, the third downlink time slot is before the fourth time slot or the third downlink time slot is the fourth time slot, when the first time slot When the node determines that the second node correctly receives the third data in the third downlink time slot, the scheduling information of the fourth time slot included in the third scheduling information is that the first node is in the Decoding information of the scheduling resource reserved for the fourth time slot in the first scheduling information; or, when the first node determines, in the third downlink time slot, that the second node does not correctly receive the In the case of three data, the scheduling information of the fourth time slot included in the third scheduling information is the same as the scheduling information of the third time slot, and the first node is in the third time slot to the second node. Sending the third data.
The method of any of claims 6-8, wherein the method further comprises:

Receiving, by the second node, a downlink reference signal that is sent by the first node in a fourth downlink time slot;

Decoding, by the second node, data sent by the first node in the at least one downlink time slot after the fourth downlink time slot and the fourth downlink time slot according to the downlink reference signal;

The length of time between the start time of the fourth downlink time slot and the end time of the latest time slot of the end time in the at least one downlink time slot after the fourth downlink time slot is less than or equal to the Preset threshold.
The method of any of claims 6-9, wherein the method further comprises:

The second node sends an uplink reference signal to the first node in a first uplink time slot.
A first node, comprising:

a determining unit, configured to determine first scheduling information, where the first scheduling information includes scheduling information of each time slot in a specific time slot, where the specific time slot includes a first downlink time slot and the first downlink At least one time slot after the time slot;

a first sending unit, configured to send the first scheduling information to the second node in the first downlink time slot;

The coherence time of the channel between the first node and the second node is greater than or equal to a preset threshold, and the start time of the first downlink time slot and the end time of the specific time slot are the most The length of time between the end times of the late time slots is less than or equal to the predetermined threshold.
The first node according to claim 11, wherein in an uplink hybrid automatic repeat request HARQ process, when the first node fails to determine whether the first one is correctly received in the first downlink time slot Data, and the first node can determine whether the first data is correctly received when the second downlink time slot is

The first sending unit is further configured to send second scheduling information to the second node in the second downlink time slot, where scheduling information of the second time slot included in the second scheduling information is the The scheduling information on which the second node transmits the second data on the second time slot;

When the first node determines that the first data is correctly received in the second downlink time slot, the scheduling information of the second time slot included in the second scheduling information is that the first node is And the information about the scheduling resource reserved for the second time slot in the first scheduling information; or, when the first node determines that the first data is not correctly received in the second downlink time slot, The scheduling information of the second time slot included in the second scheduling information is the same as the scheduling information of the first time slot;

The second time slot belongs to the specific time slot, the first data is data sent by the second node to the first node in the first time slot, and the second data is The first data sent by the second node after transmitting the first data, and the second downlink time slot is before the second time slot.
The first node according to claim 11 or 12, wherein in a downlink HARQ process, when the first node fails to determine whether the second node is correctly received in the first downlink time slot a third data, and the first node is capable of determining, in the third downlink time slot, whether the second node correctly receives the third data,

The first sending unit is further configured to send third scheduling information to the second node in the third downlink time slot, where the scheduling information of the fourth time slot included in the third scheduling information is the The scheduling information on which the second node receives the fourth data on the fourth time slot;

When the first node determines that the second node correctly receives the third data in the third downlink time slot, the scheduling information of the fourth time slot included in the third scheduling information is Decoding, by the first node, the scheduling resource reserved for the fourth time slot in the first scheduling information; or, when the first node determines, in the third downlink time slot, the second node is not When the third data is correctly received, the scheduling information of the fourth time slot included in the third scheduling information is the same as the scheduling information of the third time slot;

The fourth time slot belongs to the specific time slot, the first node sends the third data to the second node in the third time slot, and the fourth data is the first time slot. And transmitting, by the node, the first data sent after the third data, where the third downlink time slot is before the fourth time slot or the third downlink time slot is the fourth time slot.
The first node according to any one of claims 11 to 13, wherein the first node further comprises:

The second sending unit is configured to send a downlink reference signal to the second node in the fourth downlink time slot.
The first node according to any one of claims 11 to 14, wherein the first node further comprises:

a receiving unit, configured to receive an uplink reference signal sent by the second node in the first uplink time slot;

a demodulation unit, configured to demodulate data sent by the second node in the first uplink time slot and at least one uplink time slot after the first uplink time slot according to the uplink reference signal;

The length of time between the start time of the first uplink time slot and the end time of the latest time slot of the end time in the at least one uplink time slot after the first uplink time slot is less than or equal to the Preset threshold.
A second node, comprising:

a first receiving unit, configured to receive first scheduling information that is sent by the first node in the first downlink time slot;

a transceiver unit, configured to send or receive data on a time slot in the specific time slot according to scheduling information of a specific time slot included in the first scheduling information, where the specific time slot includes the first a row slot and at least one slot subsequent to the first downlink slot;

The coherence time of the channel between the first node and the second node is greater than or equal to a preset threshold, and the start time of the first downlink time slot and the end time of the specific time slot are the most The length of time between the end times of the late time slots is less than or equal to the predetermined threshold.
A second node according to claim 16 wherein:

The first receiving unit is further configured to receive second scheduling information that is sent by the first node in a second downlink time slot;

The transceiver unit is further configured to send the second data on the second time slot according to the scheduling information of the second time slot included in the second scheduling information;

The second time slot belongs to the specific time slot, and the second downlink time slot is before the second time slot, when the first node determines that the second downlink time slot is correctly received. When the data is in use, the scheduling information of the second time slot included in the second scheduling information is information about scheduling resources reserved by the first node for the second time slot in the first scheduling information. Or when the first node determines that the first data is not correctly received in the second downlink time slot, the second time slot included in the second scheduling information The scheduling information is the same as the scheduling information of the first time slot, and the second node sends the first data in the first time slot.
A second node according to claim 16 or 17, wherein

The first receiving unit is further configured to receive third scheduling information that is sent by the first node in a third downlink time slot;

The transceiver unit is further configured to receive fourth data on the fourth time slot according to scheduling information of a fourth time slot included in the third scheduling information;

The fourth time slot belongs to the specific time slot, the third downlink time slot is before the fourth time slot or the third downlink time slot is the fourth time slot, when the first time slot When the node determines that the second node correctly receives the third data in the third downlink time slot, the scheduling information of the fourth time slot included in the third scheduling information is that the first node is in the Decoding information of the scheduling resource reserved for the fourth time slot in the first scheduling information; or, when the first node determines, in the third downlink time slot, that the second node does not correctly receive the In the case of three data, the scheduling information of the fourth time slot included in the third scheduling information is the same as the scheduling information of the third time slot, and the first node is in the third time slot to the second node. Sending the third data.
The second node according to any one of claims 16 to 18, wherein the second node further comprises:

a second receiving unit, configured to receive a downlink reference signal that is sent by the first node in a fourth downlink time slot;

a demodulation unit, configured to demodulate data sent by the first node in the at least one downlink time slot after the fourth downlink time slot and the fourth downlink time slot according to the downlink reference signal;

The length of time between the start time of the fourth downlink time slot and the end time of the latest time slot of the end time in the at least one downlink time slot after the fourth downlink time slot is less than or equal to the Preset threshold.
A second node according to any of claims 16-19, characterized in that The second node further includes:

And a sending unit, configured to send an uplink reference signal to the first node in the first uplink time slot.