CN111865521A

CN111865521A - Data transmission method in relay network and network side equipment

Info

Publication number: CN111865521A
Application number: CN201910353478.5A
Authority: CN
Inventors: 陈喆
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2020-10-30
Anticipated expiration: 2039-04-29
Also published as: CN111865521B

Abstract

The invention provides a data transmission method and network side equipment in a relay network, wherein the method applied to a second node comprises the following steps: when a first preset time after the scheduling time of a first resource is reached, if first target data sent by a first node is not received, interacting with a third node based on indicating the first resource to transmit other data except the first target data and based on indicating the first resource to transmit other data except the first target data, and interacting with the third node; the first resource is a resource scheduled by the third node for the second node, the first node is a downstream node of the second node, and the third node is an upstream node of the second node. Therefore, the scheme of the invention solves the problem of resource waste in the data transfer process between the nodes in the relay network architecture.

Description

Data transmission method in relay network and network side equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a data transmission method in a relay network and a network side device.

Background

In a conventional network, handover of a UE refers to handover from one base station to another base station. In the handover process, a PDCP (Packet Data Convergence Protocol) layer performs Data forwarding. However, in an NR (New Radio, New air interface) relay system, a layer 2 relay is introduced, and the layer 2 relay does not have a PDCP function but introduces an adaptation layer (adaptation layer). Among them, the relay node is called an iab (integrated access backhaul) node.

In conventional networks, the UE is directly connected to the base station. All uplink and downlink of the UE are base station scheduled. When there is data in the L2 Buffer of the UE, as shown in fig. 1, the MAC (Medium Access Control) layer of the UE starts a BSR (Buffer Status Report) procedure. By sending a BSR message to the base station, the report L2 reports the size of the buffered data to assist the network side in allocating resources to the UE. When the network side receives the BSR, the network side sends a PDCCH (Physical Downlink Control channel) including DCI (Downlink Control Information) to the UE to indicate a PUSCH (Physical Uplink shared channel) transmission resource of the UE.

In the IAB system, since there are multiple intermediate IAB nodes, in order to reduce the delay, a method of applying for a BSR in advance may be adopted, as shown in fig. 2. The IAB node 1 sends the BSR to the IAB node 2, and at this time, the data of the IAB node 1 is not received in the buffer of the IAB node 2, so according to the conventional scheme, the IAB node 2 does not send the BSR. However, there has been proposed a scheme that when the IAB node 2 receives the BSR of the IAB node 1, the BSR is directly transmitted to the host base station (Donor gNB) without waiting for the data buffered by the IAB node 1 to be transmitted. The PDCCH is then immediately sent to the IAB node 1 as in the prior art. Next, IAB node 2 receives the PDCCH scheduled resource of Donor gNB. Then, the UL data transmitted by IAB node 1 is received, and at this time, IAB node 2 transmits UL data to Donor gNB.

However, the above optimization scheme has a disadvantage that UL data transmitted from the IAB node 1 may not be successfully transmitted at one time, and then after the Donor gbb schedules resources for the IAB node 2, no data may be transmitted, thereby wasting resources.

Disclosure of Invention

The embodiment of the invention provides a data transmission method in a relay network and network side equipment, and solves the problem of resource waste in the data transfer process between nodes in a relay network architecture.

The embodiment of the invention provides a data transmission method in a relay network, which is applied to a second node, and comprises the following steps:

when first preset time after the scheduling time of a first resource is reached, if first target data sent by a first node is not received, interacting with a third node based on other data except the first target data transmitted by the first resource;

the first resource is a resource scheduled by the third node for the second node, the first node is a downstream node of the second node, and the third node is an upstream node of the second node.

The embodiment of the invention also provides a data transmission method in the relay network, which is applied to a third node, and the data transmission method in the relay network comprises the following steps:

when a first preset time after a first resource is scheduled for a second node arrives, if first target data sent by the second node through the first resource is not received, interacting with the second node based on indicating the first resource to transmit other data except the first target data;

The first target data is data sent by a first node to the second node, the first node is a downstream node of the second node, and the third node is an upstream node of the second node.

An embodiment of the present invention further provides a network side device, including: the network side device is a second node, and the processor executes the computer program to implement the following steps:

An embodiment of the present invention further provides a network side device, including: the network side device is a third node, and the processor implements the following steps when executing the computer program:

An embodiment of the present invention further provides a network side device, where the network side device is a second node, and the network side device includes:

the first interaction module is used for interacting with a third node based on the fact that the first resource is indicated to transmit other data except the first target data if the first target data sent by the first node is not received when first preset time after the scheduling time of the first resource is reached;

An embodiment of the present invention further provides a network side device, where the network side device is a third node, and the network side device includes:

the second interaction module is used for interacting with the second node based on the indication that the first resource transmits other data except the first target data if the first target data sent by the second node through the first resource is not received when first preset time after the first resource is scheduled for the second node arrives;

Embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the data transmission method in the relay network described above.

The embodiment of the invention has the beneficial effects that:

the embodiment of the invention can interact with the third node when the second node does not receive the first target data sent by the first node within the preset time after receiving the first resource scheduled by the third resource, so that the first resource scheduled by the third node for the second node can be used for transmitting other data except the first target data, and the problem of resource waste in the data transfer process between nodes in a relay network architecture is solved.

Drawings

FIG. 1 is a flow chart illustrating a BSR application in the prior art;

FIG. 2 is a flow chart illustrating a BSR pre-application in the prior art;

fig. 3 is a flowchart illustrating a data transmission method in a relay network according to a first embodiment of the present invention;

fig. 4 shows one of the flowcharts of the embodiment of the data transmission method in the relay network of the present invention;

fig. 5 shows a second flowchart of an embodiment of a data transmission method in a relay network according to the present invention;

fig. 6 is a third flowchart of a data transmission method in a relay network according to an embodiment of the present invention;

fig. 7 is a fourth flowchart of an embodiment of a data transmission method in a relay network according to the present invention;

fig. 8 is a flowchart illustrating a data transmission method in a relay network according to a second embodiment of the present invention;

fig. 9 is a schematic structural diagram of a network-side device according to a third embodiment of the present invention;

fig. 10 is a schematic structural diagram of a network-side device according to a fourth embodiment of the present invention;

fig. 11 is a block diagram of a network device according to a fifth embodiment of the present invention;

fig. 12 is a block diagram of a network device according to a sixth embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help the full understanding of the embodiments of the present invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

In addition, the terms "system" and "network" are often used interchangeably herein.

In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

In the embodiment of the present invention, the access network may be an access network including a Macro Base Station (Macro Base Station), a micro Base Station (Pico Base Station), a Node B (3G mobile Station), an enhanced Base Station (eNB), a gNB (5G mobile Station), a Home enhanced Base Station (Femto eNB or Home eNode B or Home eNB or HeNB), a relay Station, an access point, a Remote Radio Unit (RRU), an RRH (Remote Radio Head ), and the like. The user terminal may be a mobile phone (or handset), or other device capable of sending or receiving wireless signals, including user Equipment, a Personal Digital Assistant (PDA), a wireless modem, a wireless communicator, a handheld device, a laptop computer, a cordless telephone, a Wireless Local Loop (WLL) station, a CPE (customer premises Equipment) or mobile smart hotspot capable of converting mobile signals to WiFi signals, a smart appliance, or other device capable of autonomously communicating with a mobile communication network without human operation, etc.

First embodiment

The embodiment of the invention provides a data transmission method in a relay network, which is applied to a second node and solves the problem of resource waste in the data transfer process between nodes in a relay network architecture.

As shown in fig. 3, the data transmission method in the relay network according to the embodiment of the present invention specifically includes the following steps:

step 401: when a first preset time after the scheduling time of the first resource is reached, if first target data sent by the first node is not received, interacting with a third node based on other data except the first target data transmitted by the first resource.

In a relay network, a downstream node needs to forward data to an upstream node. When first target data exists in the first node and needs to be sent to the second node, the first node sends a BSR to the second node, so that the second node schedules an uplink sending opportunity (namely, schedules resources) for the first node according to the received BSR. And the second node directly sends the BSR to the third node under the condition that the second node does not receive the data sent by the first node, so that the third node schedules an uplink sending opportunity for the second node according to the received BSR.

However, when the second node receives the uplink transmission opportunity scheduled by the third node, the first target data sent by the first node may not be received yet, so that the second node cannot send the first target data to the third node at the uplink transmission opportunity scheduled by the third node.

In the embodiment of the present invention, when the above situation occurs, the third node interacts with the third node, so that the resource scheduled by the third node for the second node can be used for transmitting data other than the first target data, and the problem of resource waste is solved.

Optionally, the interacting with the third node based on instructing the first resource to transmit data other than the first target data includes:

and sending a buffer status report cancellation request message to the third node, where the buffer status report cancellation request message is used to instruct the third node to schedule the first resource to transmit data other than the first target data.

I.e. a buffer status report cancellation request message, for instructing the third node to cancel the first resource scheduled for the second node, so that the first resource may be reallocated for use by other user equipments, i.e. so that the first resource may be scheduled for transmission of other data than the first target data.

After the second node sends the cache status report cancellation request message to the third node, the following process may be further included:

when first target data sent by a first node is received, the BSR is sent to a third node again;

receiving a second resource which is newly scheduled for the second node by the third node according to the received BSR;

sending the first target data to a third node through a second resource;

or

Receiving a second resource which is newly scheduled for the second node by the third node, wherein the second resource is the resource which is newly scheduled for the second node by the third node when a third preset time after the third node receives the cache state report cancellation request message is reached;

and when receiving a second resource which is newly scheduled for the second node by the third node, if the first target data sent by the first node is not received, sending the cache state report cancellation request message to the third node until the first target data sent by the first node is received, and sending the first target data to the third node through the resource which is newly scheduled for the second node by the third node, or until the frequency of the resource which is newly scheduled for the second node by the third node reaches the preset frequency.

Specifically, if the first node is an IAB node 1, the second node is an IAB node 2, and the third node is a DonorgNB, the specific embodiment of the data transmission method in the relay network according to the present invention is shown in fig. 4, and may include the following steps:

step 501: when the IAB node 1 cache has data, the IAB node 1 sends BSR to an IAB node 2;

step 502: and after the IAB node 2 receives the BSR of the IAB node 1, the BSR is directly sent to the Donor gNB under the condition that the data is not received.

Step 503: the IAB node 2 sends a PDCCH to the IAB node 1 and schedules an uplink sending opportunity;

step 504: after receiving the BSR, the Donor gNB sends a PDCCH to the IAB node 2 and schedules an uplink sending opportunity;

step 505: the first uplink transmission failure (UL data failed) of the IAB node 1;

step 506: IAB node 2 sends a BSR cancel request message (BSR cancel) to the Donor gbb; after receiving the BSR cancel request message, the Donor gNB cancels the resources allocated by the PDCCH in step 502, so that the Donor gNB can reallocate the part of resources to other U;

step 507: IAB node 1 uplink retransmission success (UL re-transmission success);

step 508: the IAB node 2 sends BSR to the Donor gNB again;

step 509: the Donor gNB retransmits the PDCCH to the IAB node 2 and schedules an uplink transmission opportunity;

Step 510: and sending uplink data (UL data), that is, the IAB node 2 sends the data received in step 507 to the Donor gNB.

sending second target data to the third node through the first resource;

the second target data is data in a buffer of a logical channel in a second logical channel group of the second node, the second logical channel group is a logical channel group other than the first logical channel group, and the first logical channel group is a logical channel group for transmitting the first target data.

Further, the priority of the second logical channel group is lower than the priority of the first logical channel group.

In the LCP (logical channel priority) procedure of the MAC protocol, the UE should allocate uplink grants (UL grant) to logical channels in order of priority of the logical channels. In the embodiment of the present invention, when a first preset time after the scheduling time of the first resource is reached, if the first target data sent by the first node is not received, the second node preferentially sends the low-priority logical channels with data in the other caches.

For example, assume that data of LCID1 in the second node is the first target data in the corresponding first node. LCID1 has priority of one, and

LCIDs

1,2,3,4 belong to LCGID 1. Therefore, the second node sends a BSR request for ULgrant to the LCGID 1, but because the second node does not receive the first target data sent by the first node, there is data to be sent in the buffer of the LCID 5 (priority is two) belonging to the LCGID 2 at this time. Therefore, LCID1 data should be transmitted with priority because of high priority. But the second node is forced to transmit the data in LCID 5 preferentially due to the failure of the transmission of the first node by such pre-BSR.

After the second node sends the second target data to the third node through the first resource, the following process may be further included:

sending the first target data to a third node through a second resource;

or

Receiving a second resource which is newly scheduled for the second node by the third node, wherein the second resource is the resource which is newly scheduled for the second node by the third node when a fourth preset time after the third node receives the second target data is reached;

When a second resource which is newly scheduled for a second node by a third node is received, if first target data sent by a first node is not received, sending third target data to the third node through the second resource until the first target data sent by the first node is received, and sending the first target data to the third node through a resource which is newly scheduled for the second node by the third node, or until the frequency of the resource which is newly scheduled for the second node by the third node reaches a preset frequency; the third target data is data in a buffer of a logical channel in a third logical channel group, and the third logical channel group is other logical channel groups except the first logical channel group.

Specifically, if the first node is an IAB node 1, the second node is an IAB node 2, and the third node is a DonorgNB, the specific embodiment of the data transmission method in the relay network according to the present invention is shown in fig. 5, and may include the following steps:

step 601: when the IAB node 1 cache has data, the IAB node 1 sends BSR to an IAB node 2;

step 602: and after the IAB node 2 receives the BSR of the IAB node 1, the BSR is directly sent to the Donor gNB under the condition that the data is not received.

Step 603: the IAB node 2 sends a PDCCH to the IAB node 1 and schedules an uplink sending opportunity;

step 604: after receiving the BSR, the Donor gNB sends a PDCCH to the IAB node 2 and schedules an uplink sending opportunity;

step 605: the first uplink transmission of the IAB node 1 fails;

step 606: sending uplink data (UL data (other LCG)) of another logical channel, that is, sending, by the IAB node 2, data in the buffer of the logical channel in the second logical channel group to the Donor gbb, where the second logical channel group is another logical channel group except the first logical channel group, and the first logical channel group is a logical channel group for transmitting the first target data;

step 607: the IAB node 2 sends BSR to the Donor gNB again;

step 608: IAB node 1 uplink retransmission success (UL re-transmission success);

step 609: the Donor gNB retransmits the PDCCH to the IAB node 2 and schedules an uplink transmission opportunity;

step 610: IAB node 2 sends the data received in step 607 to Donor gNB.

and sending a rescheduling indication message to the third node through the first resource, wherein the rescheduling indication message carries delay time information for indicating the third node to reschedule the resource for the second node.

In the embodiment of the present invention, when the first preset time after receiving the first resource scheduled by the third node for the second node arrives, the second node does not resend the BSR to the third node, but sends a rescheduling instruction carrying delay time information to the third node, which can further reduce the time delay and reduce the signaling overhead.

Further, after the sending the rescheduling indication message to the third node through the first resource, the method further includes:

and receiving a second resource rescheduled for the second node by the third node according to the delay time information.

The delay time information is determined according to the time required by the second node to send the scheduling retransmission instruction to the first node and the processing time of the second node, namely, the delay time information is designed based on the fact that the second node expects that the next retransmission of the first node can be received. Therefore, the second node sends the delay time information to the third node, so that the second node can receive the first target data sent by the first node in a short time after the third node reschedules resources for the second node according to the delay time information, and the total time required for transmitting the first target data from the first node to the third node can be reduced.

Optionally, the rescheduling indication message further includes: second target data; the second target data is data in a buffer of a logical channel in a second logical channel group of the second node, the second logical channel group is a logical channel group other than the first logical channel group, and the first logical channel group is a logical channel group for transmitting the first target data.

Namely, the delay time information can be sent to the third node through the first resource, and meanwhile, other data except the first target data are transmitted to the third node, so that the first resource is further fully utilized, and the resource waste is further reduced.

In addition, the second node may further include, within a fifth preset time after receiving the second resource rescheduled by the third node for the second node according to the delay time information, if the first target data sent by the first node has not been received, the following process:

when first target data sent by the first node is received, the BSR is sent to the third node again;

sending the first target data to a third node through a second resource;

or

And sending the rescheduling indication message to the third node through the second resource until first target data sent by the first node is received, and sending the first target data to the third node through the resource which is scheduled for the second node by the third node for the last time, or until the frequency of the third node for re-scheduling the resource for the second node reaches a preset frequency.

Specifically, if the first node is an IAB node 1, the second node is an IAB node 2, and the third node is a DonorgNB, the specific embodiment of the data transmission method in the relay network according to the present invention is shown in fig. 6, and may include the following steps:

step 701: when the IAB node 1 cache has data, the IAB node 1 sends BSR to an IAB node 2;

step 702: and after the IAB node 2 receives the BSR of the IAB node 1, the BSR is directly sent to the Donor gNB under the condition that the data is not received.

Step 703: the IAB node 2 sends a PDCCH to the IAB node 1 and schedules an uplink sending opportunity;

step 704: after receiving the BSR, the Donor gNB sends a PDCCH to the IAB node 2 and schedules an uplink sending opportunity;

Step 705: the first uplink transmission failure (UL data failed) of the IAB node 1;

step 706: the IAB node 2 sends a re-scheduling request (re-scheduling indication) to the third node, wherein the re-scheduling request carries time information indicating when the third node reschedules resources for the second node;

step 707: the IAB node 2 retransmits the PDCH to the first node and schedules an uplink transmission opportunity (PDCCHfor re-transmission);

step 708: the third node sends the PDCCH to the second node according to the time information carried in the retransmission scheduling request in the step 706, and schedules an uplink sending opportunity;

step 709: the uplink retransmission of the IAB node 1 is successful;

step 710: and sending uplink data (UL data), that is, the IAB node 2 sends the data received in step 709 to the Donor gNB.

Optionally, the method further comprises the following two steps:

the first step is as follows: receiving a second resource rescheduled for the second node when a second preset time after the scheduling time of the first resource is reached by the third node;

the second step is as follows: when the second resource is received, if the first target data is not received, when the second preset time after the scheduling time of the second resource is received reaches, the third resource which is rescheduled for the second node is received until the first target data is received, and the first target data is sent to the third node through the resource which is scheduled for the second node by the third node for the last time, or the frequency of rescheduling the resource for the second node by the third node reaches the preset frequency.

In step 101, after interacting with the third node based on the indication of the first resource to transmit other data than the first target data, the third node may further be configured to send a PDCCH to the second node at regular intervals, and schedule an uplink sending opportunity, so that after the second node receives the first target data sent by the first node, the uplink sending opportunity recently scheduled by the third node can be adopted in time to send the first target data to the third node. Thereby reducing the time delay of the whole process of transferring the first target data from the first node to the third node.

Of course, it is understood that the above-mentioned process of "the third node sends the PDCCH to the second node once at regular intervals and schedules an uplink transmission opportunity" once (i.e. the above-mentioned first step and second step) may also exist without depending on the above-mentioned step 401, that is, the above-mentioned process of "the third node sends the PDCCH to the second node once at regular intervals and schedules an uplink transmission opportunity" once (i.e. the above-mentioned first step and second step) may be implemented separately.

Namely, the data transmission method in the relay network can be implemented according to the following processes:

When first preset time after the scheduling time of first resources arrives, if first target data sent by a first node is not received, receiving second resources rescheduled for a second node when second preset time after the scheduling time of the first resources arrives by a third node; when the second resource is received, if the first target data is not received, when the second preset time after the scheduling time of the second resource is received reaches, the third resource which is rescheduled for the second node is received until the first target data is received, and the first target data is sent to the third node through the resource which is scheduled for the second node by the third node for the last time, or the frequency of rescheduling the resource for the second node by the third node reaches the preset frequency.

In the process of "the third node sends a PDCCH to the second node once at a certain time interval and schedules an uplink transmission opportunity" (i.e., the first step and the second step), the second node does not resend the BSR to the third node, and therefore, the time delay can be further reduced by the process of "the third node sends a PDCCH to the second node once at a certain time interval and schedules an uplink transmission opportunity" (i.e., the first step and the second step).

Specifically, if the first node is an IAB node 1, the second node is an IAB node 2, and the third node is a DonorgNB, the specific embodiment of the data transmission method in the relay network according to the present invention is shown in fig. 7, and may include the following steps:

step 801: when the IAB node 1 cache has data, the IAB node 1 sends BSR to an IAB node 2;

step 802: and after the IAB node 2 receives the BSR of the IAB node 1, the BSR is directly sent to the Donor gNB under the condition that the data is not received.

Step 803: the IAB node 2 sends a PDCCH to the IAB node 1 and schedules an uplink sending opportunity;

step 804: after receiving the BSR, the Donor gNB sends a PDCCH to the IAB node 2 and schedules an uplink sending opportunity;

step 805: the first uplink transmission failure (UL data failed) of the IAB node 1;

step 806: IAB node 2 does not send any information on the resources scheduled in step 804 (node to send);

step 807: since no data is transmitted in step 806, the Donor gbb will consider that this is an unsuccessful transmission, and resend the PDCCH to the second node, and schedule an uplink transmission opportunity (. PDCCH (re-tr indication));

step 809: IAB node 1 uplink retransmission success (UL re-transmission success);

step 810: and sending uplink data (UL data), that is, the IAB node 2 sends the data received in step 809 to the Donor gNB.

Second embodiment

The embodiment of the invention provides a data transmission method in a relay network, which is applied to a third node and solves the problem of resource waste in the data transfer process between nodes in a relay network architecture.

As shown in fig. 8, the data transmission method in the relay network according to the embodiment of the present invention specifically includes the following steps:

step 901: when a first preset time after a first resource is scheduled for a second node arrives, if first target data sent by the second node through the first resource is not received, interacting with the second node based on indicating the first resource to transmit other data except the first target data.

In a relay network, a downstream node needs to forward data to an upstream node. When first target data exists in the first node and needs to be sent to the second node, the first node sends a BSR to the second node, so that the second node schedules an uplink sending opportunity (namely, schedules resources) for the first node according to the received BSR. And the second node directly sends the BSR to the third node under the condition that the second node does not receive the data sent by the first node, so that the third node schedules an uplink sending opportunity for the second node according to the received Oreou BSR.

Optionally, the interacting with the second node based on instructing the first resource to transmit data other than the first target data includes:

receiving a cache status report cancellation request message sent by the second node;

and scheduling the first resource to transmit other data except the first target data according to the cache status report cancellation request message.

After the third node receives the cache status report cancellation request message sent by the second node, the following process may also be included:

receiving a BSR (buffer status report) sent to a third node again by a second node when receiving first target data sent by a first node;

scheduling the second resource for the second node again according to the received BSR;

receiving first target data sent by a second node through a second resource;

or

When a third preset time after the cache state report cancellation request message is received reaches, rescheduling second resources for the second node;

and receiving the cache state report cancellation request message retransmitted by the second node until the first target data transmitted by the second node is received, or until the frequency of the third node scheduling resources for the second node again reaches a preset frequency, wherein the second node retransmits the cache state report cancellation request message to the third node when the second resource scheduled for the second node by the third node is received and the first target data transmitted by the first node is not received.

Receiving second target data sent by the second node through the first resource;

In the LCP (logical channel priority) procedure of the MAC protocol, the UE should allocate UL grant to the logical channel in order of priority of the logical channel. In the embodiment of the present invention, when a first preset time arrives after receiving a first resource scheduled by a third node for a second node, if a first target data sent by a first node is not received, the second node preferentially sends a low-priority logical channel with data in other caches.

LCIDs

After the third node receives the data in the buffer of the second logical channel group of the second node, which is sent by the second node through the first resource, the following process may also be included:

receiving first target data sent by a second node through a second resource;

or

When fourth preset time after second target data sent by the second node through the first resource is received reaches, the second resource is scheduled for the second node again;

receiving third target data sent by the second node through the second resource until the first target data sent by the second node is received, or until the frequency of the third node for scheduling the second node for the second node again reaches a preset frequency; the third target data is data in a buffer of a logical channel in a third logical channel group, and the third logical channel group is other logical channel groups except the first logical channel group.

And receiving a rescheduling indication message sent by the second node through the first resource, wherein the rescheduling indication message carries delay time information for indicating the third node to reschedule the resource for the second node.

Further, after receiving the rescheduling indication message sent by the second node through the first resource, the method further includes:

and rescheduling second resources for the second node according to the delay time information.

That is, the second node may also transmit the delay time information to the third node through the first resource, and transmit other data except the first target data to the third node, so as to further fully utilize the first resource, and further reduce resource waste.

If the second node does not receive the first target data sent by the first node within a fifth preset time after the second resource rescheduled for the second node by the third node according to the delay time information, the method may further include:

Receiving first target data sent by a second node through a second resource;

or

And receiving the rescheduling indication message sent by the second node through the second resource until the first target data sent by the second node is received or the frequency of the third node for rescheduling the resource for the second node reaches the preset frequency.

Optionally, the method further comprises:

the third step: when a second preset time after the scheduling time of the first resource is reached, a second resource is scheduled for the second node again;

the fourth step: and in the second preset time after the scheduling time of the second resource, if the first target data sent by the second node through the second resource is not received, re-scheduling a third resource for the second node until the first target data sent by the second node is received, or until the number of times of re-scheduling resources for the second node reaches a preset number.

In step 901, after the data other than the first target data is transmitted based on the indication of the first resource and interacts with the second node, the third node may further be configured to send a PDCCH to the second node at regular intervals, and schedule an uplink sending opportunity, so that after the second node receives the first target data sent by the first node, the uplink sending opportunity recently scheduled by the third node can be adopted in time to send the first target data to the third node. Thereby reducing the time delay of the whole process of transferring the first target data from the first node to the third node.

Of course, it can be understood that the above-mentioned process of "the third node sends the PDCCH to the second node once at regular intervals and schedules an uplink transmission opportunity" once (i.e. the above-mentioned third step and fourth step) may also exist without depending on the above-mentioned step 901, that is, the above-mentioned process of "the third node sends the PDCCH to the second node once at regular intervals and schedules an uplink transmission opportunity" once (i.e. the above-mentioned third step and fourth step) may be implemented separately.

when a first preset time after a first resource is scheduled for a second node is reached, if first target data sent by the second node through the first resource is not received, the second resource is scheduled for the second node again until the first target data sent by the second node is received or until the frequency of the third node for scheduling the second node for resources again reaches a preset frequency.

In the process of "the third node sends a PDCCH to the second node once at a certain time interval and schedules an uplink transmission opportunity" (i.e., the third step and the fourth step), the second node does not resend the BSR to the third node, and therefore, the time delay can be further reduced by the process of "the third node sends a PDCCH to the second node once at a certain time interval and schedules an uplink transmission opportunity" (i.e., the first step and the second step).

Third embodiment

In order to better achieve the above object, an embodiment of the present invention further provides a network side device, where the network side device is a second node, and as shown in fig. 9, the network side device includes: a processor 1000; a memory 1020 coupled to the processor 1000 via a bus interface, and a transceiver 1010 coupled to the processor 1000 via a bus interface; the memory 1020 is used for storing programs and data used by the processor in performing operations; transmitting data information or pilot frequency through the transceiver 1010, and receiving an uplink control channel through the transceiver 1010; when the processor 1000 calls and executes the programs and data stored in the memory 1020, the following functions are implemented:

Optionally, the processor 1000 implements the following steps when executing the computer program:

Optionally, the processor 1000, when executing the computer program, implements the following steps:

sending second target data to the third node through the first resource;

Optionally, the rescheduling indication message further includes: second target data;

Optionally, the priority of the second logical channel group is lower than the priority of the first logical channel group.

receiving a second resource rescheduled for the second node when a second preset time after the scheduling time of the first resource is reached by the third node;

when the second resource is received, if the first target data is not received, when the second preset time after the scheduling time of the second resource is received reaches, the third resource which is rescheduled for the second node is received until the first target data is received, and the first target data is sent to the third node through the resource which is scheduled for the second node by the third node for the last time, or the frequency of rescheduling the resource for the second node by the third node reaches the preset frequency.

In fig. 9, among other things, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1000, and various circuits, represented by memory 1020, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1010 may be a number of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 1000 is responsible for managing the bus architecture and general processing, and the memory 1020 may store data used by the processor 1000 in performing operations.

Those skilled in the art will appreciate that all or part of the steps for implementing the above embodiments may be performed by hardware, or may be instructed to be performed by associated hardware by a computer program that includes instructions for performing some or all of the steps of the above methods; and the computer program may be stored in a readable storage medium, which may be any form of storage medium.

Fourth embodiment

In order to better achieve the above object, an embodiment of the present invention further provides a network side device, where the network side device is a third node, and as shown in fig. 10, the network side device includes: a processor 1100; a memory 1120 connected to the processor 1100 through a bus interface, and a transceiver 1110 connected to the processor 1100 through a bus interface; the memory 1120 is used for storing programs and data used by the processor in performing operations; transmitting data information or pilot frequency through the transceiver 1110, and receiving an uplink control channel through the transceiver 1110; when the processor 1100 calls and executes the programs and data stored in the memory 1120, the following functions are implemented:

the processor 1100, when executing the computer program, performs the following steps:

Optionally, the processor 1100 implements the following steps when executing the computer program:

when a second preset time after the scheduling time of the first resource is reached, a second resource is scheduled for the second node again;

and in the second preset time after the scheduling time of the second resource, if the first target data sent by the second node through the second resource is not received, re-scheduling a third resource for the second node until the first target data sent by the second node is received, or until the number of times of re-scheduling resources for the second node reaches a preset number.

Where in fig. 10, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1100, and various circuits, represented by memory 1120, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1110 may be a number of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 may store data used by the processor 1100 in performing operations.

Fifth embodiment

The embodiment of the invention also provides network side equipment, and the network side equipment is a second node. Specifically, as shown in fig. 11, the network side device 1200 according to the embodiment of the present invention includes the following functional modules:

a first interaction module 1200, configured to, when a first preset time after a scheduling time of a first resource is reached, if first target data sent by a first node is not received, interact with a third node based on indicating that the first resource transmits data other than the first target data;

Optionally, the first interaction module 1200 includes:

a first sending unit, configured to send a buffer status report cancellation request message to the third node, where the buffer status report cancellation request message is used to instruct the third node to schedule the first resource to transmit data other than the first target data.

Optionally, the first interaction module 1200 includes:

a second sending unit, configured to send second target data to the third node through the first resource;

Optionally, the first interaction module 1200 includes:

a third sending unit, configured to send a rescheduling indication message to the third node through the first resource, where the rescheduling indication message carries delay time information used to indicate the third node to reschedule a resource for the second node again.

Optionally, the network side device further includes:

a first receiving module, configured to receive a second resource rescheduled by the second node according to the delay time information by the third node.

Optionally, the network side device further includes:

a second receiving module, configured to receive a second resource rescheduled by the second node when a second preset time after the scheduling time of the first resource arrives;

a third receiving module, configured to, when receiving the second resource, receive, if the first target data has not been received, a third resource rescheduled for the second node when the second preset time after the scheduling time of the second resource is reached until the first target data is received, and send the first target data to the third node through a resource scheduled for the second node by the third node last time, or until the number of times that the third node schedules the resource for the second node again reaches a preset number of times.

Sixth embodiment

The embodiment of the invention also provides network side equipment, and the network side equipment is a third node. Specifically, as shown in fig. 12, the network-side device 1300 according to the embodiment of the present invention includes the following functional modules:

a second interaction module 1300, configured to, when a first preset time arrives after a first resource is scheduled for a second node, if first target data sent by the second node through the first resource is not received, interact with the second node based on indicating that the first resource transmits data other than the first target data;

Optionally, the second interaction module 1300 includes:

a first receiving unit, configured to receive a cache status report cancellation request message sent by the second node;

and the resource scheduling unit is used for scheduling the first resource to transmit other data except the first target data according to the cache status report cancellation request message.

Optionally, the second interaction module 1300 includes:

A second receiving unit, configured to receive second target data sent by the second node through the first resource;

Optionally, the second interaction module 1300 includes:

a third receiving unit, configured to receive a rescheduling indication message sent by the second node through the first resource, where the rescheduling indication message carries delay time information used to indicate the third node to reschedule the resource for the second node.

Optionally, the network side device further includes:

and the first scheduling module is used for rescheduling the second resource for the second node according to the delay time information.

Optionally, the network side device further includes:

a second scheduling module, configured to reschedule a second resource for the second node when a second preset time after the scheduling time of the first resource is reached;

and a third scheduling module, configured to, within the second preset time after the scheduling time of the second resource, if the first target data sent by the second node through the second resource is not received, reschedule a third resource for the second node again until the first target data sent by the second node is received, or until the number of times of rescheduling the resource for the second node reaches a preset number of times.

As can be seen from the above, in the embodiment of the present invention, when the second node does not receive the first target data sent by the first node within the preset time after receiving the first resource scheduled by the third resource for the second node, the second node interacts with the third node, so that the first resource scheduled by the third node for the second node can be used for transmitting data other than the first target data, and the problem of resource waste in the data transfer process between nodes in the relay network architecture is solved.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the data transmission method embodiment in the relay network in the foregoing embodiments, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.

Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A data transmission method in a relay network is applied to a second node, and the data transmission method in the relay network comprises the following steps:

2. The method of claim 1, wherein the interacting with a third node based on the other data except the first target data indicating the first resource to transmit comprises:

3. The method of claim 1, wherein the interacting with a third node based on the other data except the first target data indicating the first resource to transmit comprises:

Sending second target data to the third node through the first resource;

4. The method of claim 1, wherein the interacting with a third node based on the other data except the first target data indicating the first resource to transmit comprises:

5. The data transmission method in the relay network according to claim 4, wherein after the sending the rescheduling indication message to the third node through the first resource, further comprising:

6. The method for transmitting data in a relay network according to claim 4, wherein the rescheduling indication message further comprises: second target data;

7. The data transmission method in the relay network according to claim 3 or 6, wherein the priority of the second logical channel group is lower than the priority of the first logical channel group.

8. The data transmission method in the relay network according to claim 1, further comprising:

9. A data transmission method in a relay network is applied to a third node, and the data transmission method in the relay network comprises the following steps:

10. The method of claim 9, wherein the interacting with the second node based on the indication of the first resource to transmit the data other than the first target data comprises:

11. The method of claim 9, wherein the interacting with the second node based on the indication of the first resource to transmit the data other than the first target data comprises:

12. The method of claim 9, wherein the interacting with the second node based on the indication of the first resource to transmit the data other than the first target data comprises:

13. The method according to claim 12, wherein after receiving the rescheduling indication message sent by the second node through the first resource, the method further comprises:

14. The method for transmitting data in a relay network according to claim 12, wherein the rescheduling indication message further comprises: second target data;

15. The data transmission method in the relay network according to claim 11 or 14, wherein the priority of the second logical channel group is lower than the priority of the first logical channel group.

16. The data transmission method in the relay network according to claim 9, further comprising:

17. A network-side device, comprising: a transceiver, a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the network-side device is a second node, and wherein the processor implements the following steps when executing the computer program:

18. The network-side device of claim 17, wherein the processor, when executing the computer program, implements the steps of:

19. The network-side device of claim 17, wherein the processor, when executing the computer program, implements the steps of:

sending second target data to the third node through the first resource;

20. The network-side device of claim 17, wherein the processor, when executing the computer program, implements the steps of:

21. The network-side device of claim 20, wherein the processor, when executing the computer program, implements the steps of:

22. The network-side device of claim 20, wherein the rescheduling indication message further includes: second target data;

23. The network-side device according to claim 19 or 22, wherein the priority of the second logical channel group is lower than the priority of the first logical channel group.

24. The network-side device of claim 17, wherein the processor, when executing the computer program, implements the steps of:

25. A network-side device, comprising: a transceiver, a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the network-side device is a third node, and wherein the processor implements the following steps when executing the computer program:

26. The network-side device of claim 25, wherein the processor, when executing the computer program, implements the steps of:

27. The network-side device of claim 25, wherein the processor, when executing the computer program, implements the steps of:

28. The network-side device of claim 25, wherein the processor, when executing the computer program, implements the steps of:

29. The network-side device of claim 28, wherein the processor, when executing the computer program, implements the steps of:

30. The network-side device of claim 28, wherein the rescheduling indication message further includes: second target data;

31. The network-side device according to claim 27 or 30, wherein the priority of the second logical channel group is lower than the priority of the first logical channel group.

32. The network-side device of claim 25, wherein the processor, when executing the computer program, implements the steps of:

33. A network side device, where the network side device is a second node, the network side device includes:

34. A network side device, where the network side device is a third node, the network side device includes:

35. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the data transmission method in a relay network according to any one of claims 1 to 8, 9 to 16.