CN110719612B

CN110719612B - Method and device for forwarding data

Info

Publication number: CN110719612B
Application number: CN201810756673.8A
Authority: CN
Inventors: 陈喆; 张大钧; 刘佳敏
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2018-07-11
Filing date: 2018-07-11
Publication date: 2022-10-11
Anticipated expiration: 2038-07-11
Also published as: CN110719612A

Abstract

The invention discloses a method and a device for data forwarding, which are used for solving the problem that a 5G system in the prior art does not have a scheme for data forwarding. In the embodiment of the invention, the adaptation layer of the source relay node determines a data forwarding packet to be forwarded and sends the data forwarding packet to the intermediate relay node, the intermediate relay node receives the data forwarding packet and then sends the data packet determined in the adaptation layer to the determined network equipment, and when the network equipment is a base station, the base station determines downlink data to be forwarded according to a received downlink data packet which is sent by the relay node and aims at a terminal, and sends the determined downlink data to be forwarded to the receiving equipment. In the embodiment of the invention, the adaptation layer of the relay node is adopted to determine the next network equipment on the transmission path and the data packet to be sent, so that the PDCP function in the prior art is not adopted for data forwarding, and the data to be forwarded can be normally forwarded when the terminal in the 5G system switches the relay node.

Description

Method and device for forwarding data

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for data forwarding.

Background

In a conventional network, handover of a terminal refers to handover from one base station to another base station. In the switching process, a PDCP layer (Packet Data Convergence Protocol) forwards Data to be forwarded by the terminal.

In the 5G system, a relay base station is introduced into the 5G system in order to further extend network coverage. Multi-hop relay is also allowed when terminal data is forwarded. For example, in a 5G relay system, a terminal connects to one of the relay nodes, and then as the terminal UE moves, the terminal enters the coverage of another relay node. When a conventional network terminal performs a handover process, data of the terminal is forwarded from a source base station to a destination base station, both base stations have PDCP functions, and an Xn interface is configured between the two base stations, and an SN status transfer message can be transmitted on the Xn interface to notify which PDCP PDUs (Protocol Data units ) have not been successfully transmitted. However, in the 5G relay system, there is no Xn interface between two relay nodes, and the relay node in the 5G system also has no PDCP function, and cannot forward data that has not been successfully transmitted.

In summary, when the terminal switches the relay node in the 5G system, there is no scheme for forwarding data that has not been successfully transmitted.

Disclosure of Invention

The invention provides a method and a device for data forwarding, which are used for solving the problem that a 5G system in the prior art does not have a scheme for data forwarding.

In a first aspect, an RLC (Radio Link Control) layer of an intermediate relay node receives a data forward packet, determines a next network device on a transmission path according to device information in the data forward packet, determines a data packet to be sent, and then sends the determined data packet to the determined network device.

If the data forward packet is a downlink data forward packet, the device information includes a terminal identifier and/or an address of a destination relay node; the destination relay node is a relay node to which the terminal needs to be switched.

In the embodiment of the invention, after the RLC layer of the intermediate relay node receives the data forward packet, the next network equipment on the transmission path and the data packet needing to be sent are determined by the adaptation layer, and the determined data packet is sent to the determined network equipment. In the embodiment of the invention, the adaptation layer of the relay node is adopted to determine the next network equipment on the transmission path and the data packet to be sent, so that the PDCP function in the prior art is not adopted for data forwarding, and the data to be forwarded can be normally forwarded when the terminal in the 5G system switches the relay node.

In some specific implementations, after determining that the data forward packet is the downlink data forward packet, the adaptation layer of the intermediate relay node determines the data packet to be sent according to the data forward packet, and specifically there are the following ways:

in the first mode, downlink data are analyzed from the downlink data forward packet in the adaptation layer of the intermediate relay node, and the analyzed downlink data are packaged to obtain a data packet to be sent; or combining the analyzed downlink data with the downlink data to be forwarded and then packaging the data to obtain a data packet to be sent.

In the second mode, the adaptation layer of the intermediate relay node analyzes the serial number corresponding to the downlink data from the forward packet of the downlink data, and performs packing processing on the analyzed serial number of the downlink data and the serial number of the downlink data to be forwarded to obtain a data packet to be sent; or packing the sequence number of the analyzed downlink data to obtain a data packet to be sent.

In the third mode, the adaptation layer of the intermediate relay node analyzes the downlink data and the serial numbers of the downlink data from the forward packet of the downlink data, and packages the analyzed serial numbers of the downlink data and the downlink data to obtain a data packet to be sent; or the analyzed downlink data, the serial number of the analyzed downlink data, the downlink data to be forwarded and the serial number of the downlink data to be forwarded are packaged to obtain a data packet to be sent.

And fourthly, the adaptation layer of the intermediate relay node packs the downlink data to be forwarded to obtain a data packet to be sent.

In the embodiment of the invention, the adaptation layer of the intermediate relay node can determine the data packet to be sent by adopting various modes, thereby not only increasing the diversity of the data forwarding mode, but also further ensuring that the data to be forwarded can be forwarded normally when the terminal switches the relay node in the 5G system.

In a second aspect, an adaptation layer of a relay node determines a data forward packet containing device information and sends the data forward packet containing the device information to an RLC layer of an intermediate relay node.

If the data forward packet is a downlink data forward packet, the device information comprises a terminal identifier and/or an address of a destination relay node; the destination relay node is a relay node to which the terminal needs to be switched.

In the embodiment of the present invention, the adaptation layer of the source relay node determines the data forwarding packet that needs to be forwarded, and then sends the data forwarding packet to the intermediate relay node via the RLC layer. In the embodiment of the invention, the adaptation layer of the relay node is adopted to determine the data packet to be sent, and the PDCP function in the prior art is not adopted for data forwarding, so that the data to be forwarded can be forwarded normally when the terminal in the 5G system switches the relay node.

In some specific implementations, the adaptation layer of the source relay node combines the data to be forwarded and then performs packing processing to obtain a data packet to be sent; or

And the adaptation layer of the source relay node packs the data to be forwarded and the serial number of the data to be forwarded to obtain a data packet to be sent.

And before the source relay node adaptation layer determines the data forward packet containing the device information, the terminal context update message containing the address of the destination relay node and sent by the base station needs to be received.

In the embodiment of the invention, after receiving the terminal context update message which is sent by the base station and contains the address of the target relay node, the source relay node can determine the data packet to be sent in two various ways at the adaptation layer, thereby not only increasing the diversity of the data forwarding way, but also further ensuring that the data to be forwarded can be forwarded normally when the terminal switches the relay node in the 5G system.

And in the third aspect, the base station determines the downlink data to be forwarded according to the received downlink data packet which is sent by the relay node and aims at the terminal, determines the receiving equipment according to the terminal identifier of the terminal, and finally sends the determined downlink data to be forwarded to the receiving equipment after the determined downlink data to be forwarded is packaged.

In some specific implementations, the base station determines, according to a correspondence between the serial number and the downlink data, the downlink data corresponding to the serial number in the downlink data packet, and uses the determined downlink data as the downlink data to be forwarded. And before receiving the downlink data packet sent by the relay node, the terminal context update message containing the address of the destination relay node needs to be sent.

In the embodiment of the present invention, when the network device is a base station, the base station may determine downlink data to be forwarded according to a received downlink data packet for the terminal sent by the relay node, and send the determined downlink data to be forwarded to the receiving device. In the embodiment of the invention, the base station can determine the downlink data to be forwarded according to the data packet which is determined by the adaptation layer of other relay nodes and needs to be sent, so that the data which needs to be forwarded can be normally forwarded when the terminal in the 5G system switches the relay nodes.

In some specific implementations, after the timer corresponding to the downlink data is expired, the base station deletes the downlink data and the serial number corresponding to the expired timer in the corresponding relationship.

In the embodiment of the invention, the base station deletes the downlink data and the serial number corresponding to the overtime timer in the corresponding relationship after the timer corresponding to the downlink data is overtime, thereby releasing the internal resources of the base station.

In a fourth aspect, an apparatus for data forwarding includes a processor, a memory, and a transceiver;

the processor is used for reading the program in the memory and executing:

receiving a data forward packet; a next network device on the path; determining a data packet to be sent; and sending the determined data packet to the determined network equipment.

In some implementations, the processor is specifically configured to:

and after the forward packet of the data is determined to be the forward packet of the downlink data, determining the data packet to be sent according to the forward packet of the data.

In some implementations, the processor is further configured to:

analyzing the downlink data from the downlink data forward packet; packaging the analyzed downlink data to obtain a data packet to be sent; or combining the analyzed downlink data with the downlink data to be forwarded and then packaging the data to obtain a data packet to be sent.

In some implementations, the processor is further configured to:

analyzing a serial number corresponding to the downlink data from the forward packet of the downlink data; packaging the analyzed serial number of the downlink data and the serial number of the downlink data to be forwarded to obtain a data packet to be sent; or packing the analyzed serial number of the downlink data to obtain a data packet to be sent.

In some implementations, the processor is further configured to:

analyzing the downlink data and the serial number of the downlink data from the downlink data forward packet; packaging the analyzed downlink data and the serial number of the downlink data to obtain a data packet to be sent; or the analyzed downlink data, the serial number of the analyzed downlink data, the downlink data to be forwarded and the serial number of the downlink data to be forwarded are packaged to obtain a data packet to be sent.

In some implementations, the processor is further configured to:

and packing the downlink data to be forwarded to obtain a data packet to be sent.

In a fifth aspect, an apparatus for data forwarding includes a processor, a memory, and a transceiver;

the processor is used for reading the program in the memory and executing:

determining a data forward packet containing equipment information; and sending the data forwarding packet containing the equipment information to an RLC layer of the intermediate relay node.

In some implementations, the processor is specifically configured to:

combining the data to be forwarded and then packaging to obtain a data packet to be sent; or

And packing the data to be forwarded and the serial number of the data to be forwarded to obtain a data packet to be sent.

In some implementations, the processor is further configured to:

and before determining the data forward packet containing the equipment information, the base station sends a terminal context updating message containing the address of the destination relay node.

In a sixth aspect, an apparatus for data forwarding includes a processor, a memory, and a transceiver;

the processor is used for reading the program in the memory and executing:

determining downlink data to be forwarded according to a received downlink data packet which is sent by a relay node and aims at a terminal; the base station determines receiving equipment according to the terminal identification of the terminal; and the base station packs the determined downlink data to be forwarded and then sends the downlink data to the receiving equipment.

In some implementations, the processor is specifically configured to:

determining downlink data corresponding to the sequence number in the downlink data packet according to the corresponding relation between the sequence number and the downlink data; and taking the determined downlink data as the downlink data to be forwarded.

In some implementations, the processor is further configured to:

and deleting the downlink data and the serial number corresponding to the overtime timer in the corresponding relation after the timer corresponding to the downlink data is overtime.

In some implementations, the processor is further configured to:

before receiving a downlink data packet sent by a relay node, sending a terminal context update message containing the address of a target relay node to a source relay node.

In a seventh aspect, an apparatus for data forwarding includes:

the receiving module is used for receiving the data forward packet;

the first determining module is used for determining the next network equipment on the transmission path according to the equipment information in the data forward packet;

the first execution module is used for determining a data packet to be sent;

and the first sending module is used for sending the determined data packet to the determined network equipment.

In an eighth aspect, an apparatus for data forwarding, the apparatus comprising:

the second determining module is used for determining the data forward packet containing the equipment information;

and the second sending module is used for determining to send the data forwarding packet containing the equipment information to an RLC layer of the intermediate relay node.

In a ninth aspect, a method for forwarding data includes:

a third determining module, configured to determine, according to a received downlink data packet for a terminal sent by a relay node, downlink data to be forwarded;

a second execution module, configured to determine a receiving device according to the terminal identifier of the terminal;

and the third sending module is used for packing the determined downlink data to be forwarded and then sending the downlink data to the receiving equipment.

In a tenth aspect, a device-readable storage medium for data forwarding comprises program code for causing a computing device to perform the steps of any of the methods of an intermediate relay node or the steps of any of the methods of a source relay node or the steps of any of the methods of a base station, when said program code is run on the computing device.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a protocol framework diagram of a relay node;

FIG. 2 is a diagram of a system architecture for data forwarding according to an embodiment of the present invention;

fig. 3 is a protocol framework diagram of a network device being a destination relay node according to an embodiment of the present invention;

fig. 4 is a flowchart of a network device being a destination relay node according to an embodiment of the present invention;

FIG. 5 is a diagram of a protocol framework in which a network device is a base station according to an embodiment of the invention;

FIG. 6 is a flowchart of a network device being a base station according to an embodiment of the present invention;

fig. 7 is a protocol framework diagram of a network device being another relay node according to an embodiment of the present invention;

fig. 8 is a flowchart of a network device being another relay node according to an embodiment of the present invention;

FIG. 9 is a block diagram of an apparatus for data forwarding according to an embodiment of the present invention;

FIG. 10 is a block diagram of an apparatus for data forwarding according to an embodiment of the present invention;

FIG. 11 is a block diagram of an apparatus for data forwarding according to an embodiment of the present invention;

FIG. 12 is a block diagram of an alternative apparatus for data forwarding according to an embodiment of the present invention;

FIG. 13 is a block diagram of another data forwarding apparatus according to an embodiment of the present invention;

FIG. 14 is a block diagram of an alternative apparatus for data forwarding according to an embodiment of the present invention;

fig. 15 is a schematic diagram of a method of an intermediate relay node for data forwarding according to an embodiment of the present invention;

fig. 16 is a schematic diagram of a method of a source relay node for data forwarding according to an embodiment of the present invention;

fig. 17 is a schematic diagram of a method of a base station for data forwarding according to an embodiment of the present invention.

Detailed Description

The embodiment of the invention provides a method and a device for data forwarding, which can be applied to an application scene of data forwarding in a 5G system. In the 5G system, a protocol framework diagram of a relay node (IAB) is shown in fig. 1, and as can be seen from fig. 1, no PDCP layer exists in the relay node 1 and the relay node 2, that is, a scheme of performing data forwarding by using a PDCP function in a conventional network system is not applicable to the 5G system.

Based on the problem, in the implementation of the present invention, an adaptation layer introduced in a relay node is adopted to forward data, after a terminal determines to switch the relay node, the adaptation layer of a source relay node determines a data forward packet to be forwarded, and then sends the data forward packet to an intermediate relay node via an RLC layer, after the RLC layer of the intermediate relay node receives the data forward packet, the adaptation layer determines the next network device on a transmission path and the data packet to be sent, and sends the determined data packet to the determined network device.

In the embodiment of the invention, the adaptation layer of the relay node is adopted to determine the next network equipment on the transmission path and the data packet to be sent, so that the PDCP function in the prior art is not adopted for data forwarding, and the data can be forwarded normally when the terminal in the 5G system switches the relay node.

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 2, an embodiment of the present invention provides a system for data forwarding, which includes a source node 200, an intermediate relay node 201, and a base station 202.

The source node 200 is configured to determine a data forward packet containing the device information in the adaptation layer, and then send the data forward packet containing the device information to the RLC layer of the intermediate relay node by using the RLC layer.

A relay node 201, configured to forward packets before receiving data at an RLC layer; and determining the next network equipment on the transmission path and determining the data packet to be sent at the adaptation layer according to the equipment information in the data forward packet, and then sending the determined data packet to the determined network equipment at the RLC layer.

The base station 202 is configured to determine downlink data to be forwarded according to a received downlink data packet for the terminal sent by the relay node; and determining receiving equipment according to the terminal identification of the terminal, and sending the determined downlink data to be forwarded to the receiving equipment after packaging.

In the embodiment of the invention, an adaptation layer of a source relay node determines a data forward packet to be forwarded and then sends the data forward packet to an intermediate relay node through an RLC layer, after the RLC layer of the intermediate relay node receives the data forward packet, the next network device on a transmission path and the data packet to be sent are determined by the adaptation layer, the determined data packet is sent to the determined network device, and when the network device is a base station, the base station determines downlink data to be forwarded according to the received downlink data packet which is sent by the relay node and aims at a terminal, and sends the determined downlink data to be forwarded to a receiving device. In the embodiment of the invention, the adaptation layer of the relay node is adopted to determine the next network equipment on the transmission path and the data packet to be sent, so that the PDCP function in the prior art is not adopted for data forwarding, and the data to be forwarded can be normally forwarded when the terminal in the 5G system switches the relay node.

After the terminal determines to switch the relay node, the source relay node receives a terminal context update message source which is sent by the base station and contains the address of the target relay node, the data which is distributed to the source relay node and needs to be forwarded is determined to be a data forward packet in an adaptation layer, and equipment information is added in the data forward packet.

When the data forward packet is a downlink data forward packet, the device information may include a terminal identifier and/or an address of a destination relay node, and the destination relay node is a relay node to which the terminal needs to be handed over.

The adaptation layer of the source relay node may determine the data forward packet containing the device information in two ways:

one way is that the adaptation layer of the source relay node combines the data to be forwarded and then performs packing processing to obtain the data packet to be sent, and the other way is that the adaptation layer of the source relay node performs packing processing on the data to be forwarded and the serial number of the data to be forwarded to obtain the data packet to be sent.

Correspondingly, the RLC layer of the source relay node sends the data forwarding packet containing the equipment information to the RLC layer of the intermediate relay node.

Correspondingly, after the RLC layer of the intermediate relay node receives the data forward packet, the next network device on the transmission path is determined in the adaptation layer according to the device information in the data forward packet.

The next network device here may be a destination relay node, or another relay node on the transmission path, or a base station.

And the adaptation layer of the intermediate relay node can also judge whether the data forward packet is an uplink data packet which needs to be forwarded normally by the terminal or a downlink data forward packet which needs to be forwarded.

After determining forward packet of downlink data, the adaptation layer of the intermediate relay node determines a data packet to be sent according to the forward packet of the data, and the following specific methods exist:

firstly, an adaptation layer of an intermediate relay node analyzes downlink data from a downlink data forward packet, and packs the analyzed downlink data to obtain a data packet to be sent, or combines the analyzed downlink data with downlink data to be forwarded and packs the data packet to be sent;

in the second mode, the adaptation layer of the intermediate relay node analyzes the serial number corresponding to the downlink data from the forward packet of the downlink data, and then packages the analyzed serial number of the downlink data and the serial number of the downlink data to be forwarded to obtain a data packet to be sent; or packing the analyzed serial number of the downlink data to obtain a data packet to be sent.

In the third mode, the adaptation layer of the intermediate relay node analyzes the downlink data and the serial numbers of the downlink data from the forward packet of the downlink data, and then performs packing processing on the analyzed serial numbers of the downlink data and the downlink data to obtain a data packet to be sent; or the analyzed downlink data, the serial number of the analyzed downlink data, the downlink data to be forwarded and the serial number of the downlink data to be forwarded are packaged to obtain a data packet to be sent.

And in the fourth mode, the adaptation layer of the intermediate relay node can only pack the downlink data to be forwarded to obtain the data packet to be sent.

Accordingly, the RLC layer of the intermediate relay node transmits the determined packet to the determined network device.

When the determined network device is a base station, the base station determines downlink data corresponding to the sequence number in the downlink data packet according to the corresponding relationship between the sequence number and the downlink data after receiving the downlink data packet for the terminal sent by the relay node, and takes the determined downlink data as the downlink data to be forwarded.

Correspondingly, the base station also determines a receiving device according to the terminal identifier of the terminal, and sends the determined downlink data to be forwarded to the receiving device after the determined downlink data is packaged.

The explanation here is: when the base station sends the downlink data, the timer corresponding to the sent downlink data is started, and once the timer corresponding to the downlink data is overtime, the downlink data and the serial number corresponding to the overtime timer in the corresponding relation are deleted.

The following describes an embodiment of the present invention in detail with reference to different situations of the next network device on the transmission path.

1. The intermediate relay node determines that the next network device on the transmission path is the destination relay node (i.e. the intermediate relay node is a common upper relay node for the destination relay node and the source relay node):

here, it should be noted that: in this embodiment, as shown in fig. 3, the intermediate relay node (IAB 2) serves as a common upper node between the source relay node (IAB 1) and the destination relay node (IAB 3), where the IAB2 is a backup path, and is intended to be used as a backup link only when the active link fails (high frequency flash), but if data forwarding is required and the backup path of the switched destination relay node is the active path of the source relay node, the backup path may also be used as data forwarding. Based on this situation, the method of data forwarding is described in detail below.

Firstly, the base station configures measurement for the terminal through RRC signaling, the terminal reports a measurement report to the base station through the IAB1, and the base station makes a decision according to the reported measurement report and decides to switch the terminal to a target relay node (IAB 3).

Correspondingly, the base station sends a terminal context setup message to the IAB3 through the transmission path after the terminal is switched, and the message includes all the configuration and the address (IAB 3) of the destination relay node. Correspondingly, the IAB3 prepares air interface resources for the terminal according to the bearer information configured by the base station and other air interface configurations.

The base station sends a terminal context modification message containing the address (IAB 3) of the target relay node to the IAB1 through the original transmission path of the terminal, informs the IAB1 to delete the terminal bearer, releases air interface resources and prepares for forwarding data.

After receiving the response of the switching preparation of the IAB3 and the IAB1, the base station sends a switching command to the terminal through the original transmission path.

Correspondingly, after receiving the context modification message of the terminal, the IAB1 packages the uplink data of the terminal and sends the uplink data to the IAB2.

At this time, if the IAB1 determines that there is a part of downlink data addressed to the terminal, it needs to forward the uplink data to the IAB2.

The first optional mode is that the adaptation layer combines the downlink data to be forwarded and then performs packing processing to obtain a data forward packet to be sent, and adds the address of the IAB3 and/or the terminal identifier to the header of the adaptation layer of the data forward packet to be sent.

Another alternative is: the adaptation layer of the IAB1 packs the downlink data to be forwarded and the serial number of the downlink data to be forwarded to obtain a data forward packet to be sent.

For example, downlink data that is not sent to the terminal by the adaptation layer of the IAB1 is RLC PDUs 1, 2, and 3, at this time, the adaptation layer of the IAB1 performs packing processing on the RLC PDUs 1, 2, and 3 and corresponding sequence numbers RLC SN 1, 2, and 3 together to obtain a data forward packet to be sent, and adds the terminal and/or adds an address of the IAB3 to the header of the adaptation layer in the data forward packet to be sent.

After the IAB1 determines that the data pre-packet needs to be sent, the RLC layer of the IAB1 sends the data pre-packet to the intermediate relay node (IAB 2).

Correspondingly, after the RLC layer of the IAB2 receives the data forward packet, the adaptation layer of the IAB2 also determines whether the data forward packet is an uplink data packet to be forwarded normally by the terminal or a downlink data forward packet to be forwarded.

If the uplink data is forward-packet, transmitting the data to a base station; if the packet is a downlink data forward packet, the RLC layer of the IAB2 determines the next network device on the transmission path according to the device information in the data forward packet.

If the IAB2 stores the path information of each terminal, the network equipment can be determined to be the IAB3 according to the terminal identification; if the IAB2 does not store the path information of each terminal, it needs to determine that the network device is the IAB3 according to the address of the IAB3.

And the adaptation layer of the IAB2 determines a data packet to be sent according to the received data forward packet.

If the adaptation layer of the IAB2 only analyzes the downlink data from the downlink data forward packet, the adaptation layer of the IAB2 packs the analyzed downlink data to obtain a data packet to be sent, or combines the analyzed downlink data with the downlink data to be forwarded and packs the data packet to be sent;

if the adaptation layer of the IAB2 not only analyzes the downlink data from the downlink data forward packet, but also includes the serial number of the downlink data, at this time, the adaptation layer of the IAB2 only needs to combine the analyzed downlink data with the downlink data to be forwarded and then perform the packing process to obtain the data packet to be sent.

Here, the packetization processing means adding a terminal identifier to a packet to be transmitted.

After determining the data packet to be transmitted, the RLC layer of the IAB2 transmits the determined data packet to the determined IAB3.

Correspondingly, after receiving the data packet sent by the IAB2, the IAB3 forwards the data packet to the terminal.

Here, it should be noted that: when the downlink data of the terminal is distributed to the IAB2 and the IAB2 has not been sent out, and the IAB2 stores the terminal path information, if the IAB2 has received the request for updating the path, at this time, the IAB2 does not need to wait for the forwarded data packet sent by the IAB1, and can also determine the sent data packet according to the two ways of determining the data packet to be sent, and then send the data packet to the determined IAB3.

In the embodiment of the present invention, a two-hop relay node is taken as an example for explanation when terminal data is forwarded, and a method of a multi-hop relay node when terminal data is forwarded is similar to that of the two-hop relay node, which is not described herein again.

As shown in fig. 4, the embodiment of the present invention provides a complete method flowchart for data forwarding, where the network device is a destination relay node:

step 400, the base station configures measurement for the terminal through RRC signaling;

step 401, the terminal reports the measurement report to the upper IAB1;

step 402, the IAB1 forwards the measurement report to the base station;

step 403, after deciding to decide IAB3, the base station sends a terminal context establishment message to IAB3;

step 404, the IAB3 returns a context establishment response message to the base station;

step 405, the base station sends a terminal context modification message to the IAB1;

step 406, the IAB1 sends a terminal context modification response message to the base station;

step 407, the base station sends a switching command to the terminal;

step 408, the IAB1 forwards the uplink data to the IAB2;

step 409, the IAB2 transmits the uplink data to the base station;

step 410, IAB1 forwards the downlink data to IAB;

step 411, the IAB2 forwards the downlink data to the IAB3;

step 412, the IAB3 transmits the downlink data to the terminal.

2. The intermediate relay node determines that the next network device on the transmission path is a base station (i.e. the intermediate relay node is not an upper relay node common to the destination relay node and the source relay node):

here, it should be noted that: in this embodiment, as shown in fig. 5, the transmission path before the terminal handover is terminal-IAB 1-IAB 2-base station; the transmission path after the handover is terminal-IAB 3-IAB 5-base station. The intermediate relay node (IAB 2) is neither a transmission path of the destination relay node (IAB 3) nor a backup path, in other words, after the terminal is handed over to the IAB3, the IAB3 cannot use the IAB2 as a transmission path nor the IAB2 as a backup path. Based on this situation, the method of data forwarding is described in detail below.

Firstly, the base station configures measurement for the terminal through RRC signaling, the terminal reports a measurement report to the base station through the IAB1, and the base station makes a decision according to the reported measurement report and decides to switch the terminal to a target relay node (IAB 5).

Correspondingly, the base station sends a terminal context setup message to the IAB3 through the transmission path after the terminal is switched, where the message includes all the configurations. Correspondingly, the IAB3 prepares air interface resources for the terminal according to the bearer information configured by the base station and other air interface configurations.

The base station sends a terminal context modification message containing the address (IAB 3) of the target relay node to the IAB1 through the original transmission path of the terminal, informs the IAB1 to delete the terminal bearer, releases air interface resources and prepares to forward data.

For example, the downlink data that is not sent to the terminal by the adaptation layer of IAB1 is RLC data 1, 2, and 3, and at this time, the adaptation layer of IAB1 performs a packet processing on RLC data 1, 2, and 3 and corresponding sequence numbers RLC SN 1, 2, and 3 together to obtain a data forward packet that needs to be sent, and adds the terminal and/or adds an address of IAB3 to the adaptation layer header in the data forward packet that needs to be sent.

If the IAB2 stores the path information of each terminal, the network equipment can be determined as a base station according to the terminal identification; if the IAB2 does not store the path information of each terminal, it needs to determine that the network device is the IAB3 according to the address of the IAB3.

At this time, IAB2 decides that the transmission after the handover of the terminal does not pass through IAB2, and at this time, IAB2 determines that the network device is the base station.

Correspondingly, the adaptation layer of the IAB2 determines the data packet to be sent according to the received data forward packet.

if the adaptation layer of the IAB2 not only parses the downlink data from the downlink data forward packet, but also includes the serial number of the downlink data, at this time, the adaptation layer of the IAB2 only needs to combine the parsed serial number of the downlink data with the serial number of the downlink data to be forwarded and then performs a packing process to obtain a data packet to be sent.

After determining the data packet to be transmitted, the RLC layer of the IAB2 transmits the determined data packet to the determined base station.

Correspondingly, after receiving the data packet sent by the IAB2, the base station determines the receiving device according to the terminal identifier of the terminal, that is, determines which terminal is performing data forwarding.

The base station may also determine downlink data to be forwarded according to the received downlink data packet for the terminal, for example:

if the base station only analyzes the downlink data from the downlink data forward packet, the base station determines the analyzed downlink data as the downlink data to be forwarded; or the analyzed downlink data and the downlink data to be forwarded are combined to determine the downlink data to be forwarded;

if the base station not only analyzes the downlink data from the downlink data forward packet, but also comprises the serial number of the downlink data, the base station determines the downlink data corresponding to the serial number in the downlink data packet according to the corresponding relation between the serial number and the downlink data, and takes the determined downlink data as the downlink data to be forwarded.

Here, it should be noted that: when the base station sends every downlink data or sends every downlink data after the base station makes a switching decision, the base station starts a timer corresponding to the sent downlink data, and once the timer corresponding to the downlink data is overtime, the downlink data and the serial number corresponding to the overtime timer in the corresponding relation are deleted, so that if the base station only analyzes the serial number of the downlink data from the forward packet of the downlink data, the data forward can not be continued.

Correspondingly, the base station packs the determined downlink data to be forwarded and sends the downlink data to the receiving device.

Here, it should be noted that: when the downlink data of the terminal is distributed to the IAB2 and the IAB2 has not been sent out, and the IAB2 stores the terminal path information, if the IAB2 has received the request for updating the path, at this time, the IAB2 does not need to wait for the forwarded data packet sent by the IAB1, but can also directly determine the sent data packet according to the two ways of determining the data packet to be sent, and then send the data packet to the base station.

As shown in fig. 6, the embodiment of the present invention provides a complete method flowchart for data forwarding, where the network device is a base station:

step 600, the base station configures measurement for the terminal through RRC signaling;

step 601, the terminal reports the measurement report to the upper IAB1;

step 602, the IAB1 forwards the measurement report to the base station;

step 603, the base station decides to judge to IAB3 and sends a terminal context establishment message to IAB3;

step 604, IAB3 returns context establishment response message to the base station;

step 605, the base station sends a terminal context modification message to the IAB1;

step 606, the IAB1 sends a terminal context modification response message to the base station;

step 607, the base station sends a switching command to the terminal;

step 608, the IAB1 forwards the uplink data to the IAB2;

step 609, the IAB2 transmits the uplink data to the base station;

step 610, the IAB1 forwards the downlink data to the IAB2;

step 611, the IAB2 forwards the downlink data to the base station;

step 612, the base station forwards the downlink data to the IAB5;

step 613, the IAB5 forwards the downlink data to the IAB53;

step 614, the IAB3 transmits the downlink data to the terminal.

3. The intermediate relay node determines that the next network device on the transmission path is the other relay node on the transmission path (i.e., the device is the parent relay node of the other relay node on the transmission path):

here, it should be noted that: in this embodiment, as shown in fig. 7, the link from IAB2 to the base station is interrupted due to high frequency flash, and IAB2 has another relay node (parent relay node IAB 4) on the transmission path, that is, can be connected to the base station through IAB4. Based on this, the method of data forwarding is described in detail below.

The base station sends a terminal context modification message containing the address of a target relay node (IAB 3) to the IAB1 through an original transmission path of the terminal, informs the IAB1 to delete the terminal bearer, releases air interface resources and prepares for forwarding data.

For example, downlink data that is not sent to the terminal by the adaptation layer of the IAB1 is RLC data 1, 2, and 3, at this time, the adaptation layer of the IAB1 performs a packing process on the RLC data 1, 2, and 3 and corresponding sequence numbers RLC SN 1, 2, and 3 together to obtain a data forward packet to be sent, and adds the terminal and/or adds an address of the IAB3 to the header of the adaptation layer in the data forward packet to be sent.

At this time, the IAB2 decides that the transmission after the handover of the terminal does not pass through the IAB2, and at this time, the IAB2 determines that the next network device on the transmission path is the base station, but at this time, the IAB2 detects that the connection path with the base station is disconnected.

At this time, if the uplink data is forwarded, the data packet is transmitted to the next other relay node (parent relay node IAB 4) on the transmission path, and the IAB4 transmits the data packet to the base station;

if the data packet is a forward packet of the downlink data, the adaptation layer of the IAB2 determines the data packet to be sent according to the received forward packet of the data.

if the adaptation layer of the IAB2 not only analyzes the downlink data from the downlink data forward packet, but also includes the serial number of the downlink data, at this time, the adaptation layer of the IAB2 only needs to combine the analyzed serial number of the downlink data with the serial number of the downlink data to be forwarded and then perform the packing process to obtain the data packet to be sent.

After determining the packet to be transmitted, the RLC layer of the IAB2 transmits the determined packet to the next other relay node (parent relay node IAB 4) on the transmission path.

Correspondingly, after receiving the data packet sent by the IAB2, the other relay node (parent relay node IAB 4) forwards the data packet to the base station.

After receiving the data packet, the base station determines the receiving device according to the terminal identifier of the terminal, that is, determines which terminal is performing data forwarding, and determines downlink data to be forwarded according to the received downlink data packet for the terminal, such as:

if the base station only analyzes the serial number of the downlink data from the downlink data forward packet, the base station determines the downlink data corresponding to the serial number in the downlink data packet according to the corresponding relation between the serial number and the downlink data, and takes the determined downlink data as the downlink data to be forwarded.

Here, it should be noted that: when the base station sends every downlink data or sends every downlink data after the base station makes a switching decision, the base station starts a timer corresponding to the sent downlink data, once the timer corresponding to the downlink data is overtime, the downlink data and the serial number corresponding to the overtime timer in the corresponding relation are deleted, and at the moment, if the base station only analyzes the serial number of the downlink data from the forward packet of the downlink data, the base station cannot forward the data any more.

Correspondingly, the base station packs the determined downlink data to be forwarded and sends the downlink data to the receiving equipment.

Here, it should be noted that: when the downlink data of the terminal is distributed to the IAB2 and the IAB2 has not been sent out, and the IAB2 stores the terminal path information, if the IAB2 has received the request for updating the path, at this time, the IAB2 does not need to wait for the forwarded data packet sent by the IAB1, but can also directly determine the sent data packet according to the two ways of determining the data packet to be sent, and then send the data packet to the determined IAB4.

In the embodiment of the present invention, a three-hop relay node is taken as an example for explanation, and a method of a multi-hop relay node when forwarding terminal data is similar to a method of a two-hop relay node, which is not described herein again.

As shown in fig. 8, the embodiment of the present invention provides a flowchart of a complete method for forwarding data, where a network device is another relay node on a transmission path:

step 800, the base station configures measurement for the terminal through RRC signaling;

step 801, the terminal reports the measurement report to the upper IAB1;

step 802, the IAB1 forwards the measurement report to the base station;

step 803, the base station sends a terminal context setup message to the IAB3;

step 804, the IAB3 returns a context establishment response message to the base station;

step 805, the base station sends a terminal context modification message to the IAB1;

step 806, the IAB1 sends a terminal context modification response message to the base station;

step 807, the base station sends a switching command to the terminal;

step 808, the IAB1 forwards the uplink data to the IAB2;

step 809, the IAB2 transmits the uplink data to the IAB4;

step 810, the IAB4 transmits the uplink data to the base station;

step 811, IAB1 forwards the downlink data to IAB2;

step 812, the IAB2 forwards the downlink data to the IAB4;

step 813, IAB4 forwards the downlink data to the base station;

step 814, the base station forwards the downlink data to the IAB5;

step 815, the IAB5 forwards the downlink data to the IAB3;

step 816, the IAB3 transmits the downlink data to the terminal.

As shown in fig. 9, an embodiment of the present invention provides an apparatus for data forwarding, which includes a processor 900, a memory 901, and a transceiver 902;

the processor 900 is configured to read a program in the memory and execute:

Optionally, if the data forward packet is a downlink data forward packet, the device information includes a terminal identifier and/or an address of the destination relay node; the destination relay node is a relay node to which the terminal needs to be switched.

Optionally, the processor 900 is specifically configured to:

Optionally, the processor 900 is further configured to:

analyzing the downlink data from the forward packet of the downlink data; packaging the analyzed downlink data to obtain a data packet to be sent; or combining the analyzed downlink data with the downlink data to be forwarded and then packaging the data to obtain a data packet to be sent.

Optionally, the processor 900 is further configured to:

analyzing the downlink data and the serial number of the downlink data from the downlink data forward packet; packaging the analyzed downlink data and the serial number of the downlink data to obtain a data packet to be sent; or the analyzed downlink data and the serial number of the analyzed downlink data are packaged to obtain a data packet to be sent.

Optionally, the processor 900 is further configured to:

The bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 900, and various circuits, represented by memory 901, 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 processor 900 is responsible for managing the bus architecture and general processing, and the memory 901 may store data used by the processor 900 in performing operations.

The processes disclosed in the embodiments of the present invention may be applied to the processor 900, or implemented by the processor 900. In implementation, the steps of the signal processing flow may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 900. The processor 900 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 901, and the processor 900 reads the information in the memory 901 and completes the steps of the signal processing flow in combination with the hardware thereof.

As shown in fig. 10, an embodiment of the present invention provides an apparatus for data forwarding, which includes a processor 1000, a memory 1001 and a transceiver 1002;

the processor 1000 is configured to read a program in the memory and execute:

Optionally, the processor 1000 is specifically configured to:

Optionally, the processor 1000 is further configured to:

and before determining the data forward packet containing the equipment information, the base station sends a terminal context updating message containing the address of the target relay node.

The bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1000 and various circuits of memory represented by memory 1001 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 processor 1000 is responsible for managing the bus architecture and general processing, and the memory 1001 may store data used by the processor 1000 in performing operations.

The processes disclosed in the embodiments of the present invention may be applied to the processor 1000, or implemented by the processor 1000. In implementation, the steps of the signal processing flow may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 1000. The processor 1000 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1001, and the processor 1000 reads information in the memory 1001 and completes steps of the signal processing flow in combination with hardware thereof.

As shown in fig. 11, an embodiment of the present invention provides an apparatus for data forwarding, which includes a processor 1100, a memory 1101, and a transceiver 1102;

the processor 1100 is configured to read a program in the memory and execute:

Optionally, the processor 1100 is specifically configured to:

Optionally, the processor 1100 is further configured to:

Optionally, before receiving the downlink data packet sent by the relay node, a terminal context update message containing an address of the destination relay node is sent to the source relay node.

The bus architecture may comprise any number of interconnected buses and bridges, with one or more processors, represented by the processor 1100, and various circuits, represented by the memory 1101, 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 processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1101 may store data used by the processor 1100 in performing operations.

The processes disclosed in the embodiments of the present invention can be implemented in the processor 1100, or implemented by the processor 1100. In implementation, the steps of the signal processing flow may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 1100. The processor 1100 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1101, and the processor 1100 reads information in the memory 1101, and completes the steps of the signal processing flow in combination with hardware thereof.

As shown in fig. 12, an embodiment of the present invention provides an apparatus for data forwarding, where the apparatus includes:

a receiving module 1200, configured to receive a data forward packet;

a first determining module 1201, configured to determine, according to the device information in the data forward packet, a next network device on a transmission path;

a first executing module 1202, configured to determine a data packet to be sent;

a first sending module 1203, configured to send the determined data packet to the determined network device.

Optionally, the first executing module 1202 is specifically configured to:

analyzing the downlink data from the downlink data forward packet;

packaging the analyzed downlink data to obtain a data packet to be sent; or combining the analyzed downlink data with the downlink data to be forwarded and then packaging the data to obtain a data packet to be sent.

Optionally, the first executing module 1202 is specifically configured to:

analyzing a serial number corresponding to the downlink data from the forward packet of the downlink data;

packaging the analyzed serial number of the downlink data and the serial number of the downlink data to be forwarded to obtain a data packet to be sent; or packing the analyzed serial number of the downlink data to obtain a data packet to be sent.

Optionally, the first executing module 1202 is further configured to:

analyzing the downlink data and the serial number of the downlink data from the downlink data forward packet;

packaging the analyzed downlink data and the serial number of the downlink data to obtain a data packet to be sent; or the analyzed downlink data, the serial number of the analyzed downlink data, the downlink data to be forwarded and the serial number of the downlink data to be forwarded are packaged to obtain a data packet to be sent.

Optionally, the first executing module 1202 is further configured to:

and packaging the downlink data to be forwarded to obtain a data packet to be sent.

As shown in fig. 13, an embodiment of the present invention provides an apparatus for data forwarding, where the apparatus includes:

a second determining module 1300, configured to determine a data forward packet containing device information;

a second sending module 1301, configured to determine to send the data forwarding packet containing the device information to an RLC layer of the intermediate relay node.

Optionally, the second determining module 1300 is specifically configured to:

combining the data to be forwarded and then packaging the data to obtain a data packet to be sent; or

Optionally, the second determining module 1300 is further configured to:

and receiving a terminal context updating message which is sent by the base station and contains the address of the destination relay node before determining the data forward packet containing the equipment information.

As shown in fig. 14, an embodiment of the present invention provides a device for data forwarding, where the method includes:

a third determining module 1400, configured to determine, according to a received downlink data packet for a terminal sent by a relay node, downlink data to be forwarded;

a second executing module 1401, configured to determine a receiving device according to the terminal identifier of the terminal;

a third sending module 1402, configured to perform a packing process on the determined downlink data to be forwarded, and send the downlink data to the receiving device.

Optionally, the third determining module 1400 is specifically configured to:

Optionally, the third determining module 1400 is further configured to:

and after the timer corresponding to the downlink data is overtime, deleting the downlink data and the serial number corresponding to the overtime timer in the corresponding relation.

Optionally, the third determining module 1400 is further configured to:

before receiving a downlink data packet sent by the relay node, sending a terminal context update message containing the address of the target relay node to the source relay node.

Based on the same inventive concept, the embodiment of the present invention further provides a method for a source intermediate relay node for data forwarding, and since the device corresponding to the method is the intermediate relay node in the system for data forwarding in the embodiment of the present invention, and the principle for solving the problem of the method is similar to that of the device, the implementation of the method can refer to the implementation of the system, and repeated details are not repeated.

As shown in fig. 15, an embodiment of the present invention provides a method for data forwarding, where the method includes:

1500, the RLC layer of the intermediate relay node receives the forward packet of the data;

step 1501, the adaptation layer of the intermediate relay node determines the next network device on the transmission path according to the device information in the data forward packet;

step 1502, the adaptation layer of the intermediate relay node determines a data packet to be sent;

and 1503, the RLC layer of the intermediate relay node sends the determined data packet to the determined network device.

Optionally, the determining, by the adaptation layer of the intermediate relay node, a data packet to be sent includes:

and after determining that the forward data packet is a forward downlink data packet, the adaptation layer of the intermediate relay node determines a data packet to be sent according to the forward data packet.

Optionally, the method includes:

the adaptation layer of the intermediate relay node analyzes the downlink data from the downlink data forward packet;

the adaptation layer of the intermediate relay node packs the analyzed downlink data to obtain a data packet to be sent; or combining the analyzed downlink data with the downlink data to be forwarded and then packaging the data to obtain a data packet to be sent.

Optionally, the determining, by the adaptation layer of the intermediate relay node, the data packet to be sent according to the data forward packet, further includes:

the adaptation layer of the intermediate relay node analyzes a serial number corresponding to the downlink data from the downlink data forward packet;

the adaptation layer of the intermediate relay node packs the sequence number of the analyzed downlink data and the sequence number of the downlink data to be forwarded to obtain a data packet to be sent; or packing the analyzed serial number of the downlink data to obtain a data packet to be sent.

Optionally, the determining, by the adaptation layer of the intermediate relay node, a data packet to be sent according to the data in the data forward packet, further includes:

the adaptation layer of the intermediate relay node analyzes the downlink data and the serial number of the downlink data from the downlink data forward packet;

the adaptation layer of the intermediate relay node packs the analyzed downlink data and the serial number of the downlink data to obtain a data packet to be sent; or the analyzed downlink data, the serial number of the analyzed downlink data, the downlink data to be forwarded and the serial number of the downlink data to be forwarded are packaged to obtain a data packet to be sent.

Optionally, the determining, by the adaptation layer of the intermediate relay node, a data packet to be sent further includes:

and the adaptation layer of the intermediate relay node packs the downlink data to be forwarded to obtain a data packet to be sent.

Based on the same inventive concept, the embodiment of the present invention further provides a method for a source relay node for data forwarding, and since the device corresponding to the method is the source relay node in the system for data forwarding in the embodiment of the present invention, and the principle of the method for solving the problem is similar to that of the device, the implementation of the method can refer to the implementation of the system, and repeated details are not described again.

As shown in fig. 16, an embodiment of the present invention provides a method for data forwarding, where the method includes:

step 1600, the adaptation layer of the source relay node determines a data forward packet containing equipment information;

step 1601, the RLC layer of the source relay node sends the data forwarding packet containing the device information to the RLC layer of the intermediate relay node.

Optionally, if the data forward packet is a downlink data forward packet, the device information includes a terminal identifier and/or an address of the destination relay node; the target relay node is a relay node to which the terminal needs to be switched.

Optionally, the determining, by the adaptation layer of the source relay node, a data forward packet including device information includes:

the adaptation layer of the source relay node combines the data to be forwarded and then performs packaging processing to obtain a data packet to be sent; or

Optionally, before the source relay node adaptation layer determines that the data forward packet contains the device information, the method further includes:

and the source relay node receives a terminal context updating message which is sent by the base station and contains the address of the target relay node.

Based on the same inventive concept, the embodiment of the present invention also provides a method for a base station for data forwarding, and because the device corresponding to the method is the base station in the system for data forwarding in the embodiment of the present invention, and the principle of the method for solving the problem is similar to that of the device, the implementation of the method can refer to the implementation of the system, and repeated parts are not described again.

As shown in fig. 17, an embodiment of the present invention provides a method for data forwarding, where the method includes:

step 1700, the base station determines downlink data to be forwarded according to the received downlink data packet for the terminal sent by the relay node;

step 1701, the base station determines receiving equipment according to the terminal identification of the terminal;

step 1702, the base station performs packet processing on the determined downlink data to be forwarded, and then sends the downlink data to be forwarded to the receiving device.

Optionally, the determining, by the base station, the downlink data to be forwarded according to the received downlink data packet for the terminal sent by the relay node includes:

the base station determines downlink data corresponding to the sequence number in the downlink data packet according to the corresponding relation between the sequence number and the downlink data;

and the base station takes the determined downlink data as the downlink data to be forwarded.

Optionally, the method further includes:

and after the timer corresponding to the downlink data is overtime, the base station deletes the downlink data and the serial number corresponding to the overtime timer in the corresponding relation.

Optionally, before the base station receives the downlink data packet sent by the relay node, the method further includes:

and the base station sends a terminal context updating message containing the address of the target relay node to the source relay node.

An apparatus readable storage medium for data forwarding in an embodiment of the present invention includes a program code, and when the program code runs on a computing apparatus, the program code is configured to enable the computing apparatus to perform any one of the steps of the method of an intermediate relay node or the steps of the method of a source relay node or the steps of the method of a base station.

The present application is described above with reference to block diagrams and/or flowchart illustrations of methods, apparatus (systems) and/or computer program products according to embodiments of the application. It will be understood that one block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, and/or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer and/or other programmable data processing apparatus, create means for implementing the functions/acts specified in the block diagrams and/or flowchart block or blocks.

Accordingly, the subject application may also be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.). Furthermore, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system. In the context of this application, a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method of data forwarding, the method comprising:

a Radio Link Control (RLC) layer of the intermediate relay node receives a forward packet of data;

the adaptation layer of the intermediate relay node determines the next network equipment on the transmission path according to the equipment information in the data forward packet;

the adaptation layer of the intermediate relay node determines a data packet to be sent; after determining that the forward packet of the data is a forward packet of downlink data, an adaptation layer of the intermediate relay node determines a data packet to be sent according to the forward packet of the data;

and the RLC layer of the intermediate relay node sends the determined data packet to the determined network equipment.

2. The method of claim 1,

if the data forward packet is a downlink data forward packet, the equipment information comprises a terminal identifier and/or an address of a target relay node; the destination relay node is a relay node to which the terminal needs to be switched.

3. The method of claim 1, wherein the determining, by the adaptation layer of the intermediate relay node, the data packet to be transmitted according to the data forward packet comprises:

4. The method of claim 1, wherein an adaptation layer of the intermediate relay node determines a data packet to be transmitted according to the data forward packet, further comprising:

5. The method of claim 1, wherein an adaptation layer of the intermediate relay node determines a data packet to be transmitted according to data in the data forward packet, further comprising:

6. The method of claim 1, wherein an adaptation layer of the intermediate relay node determines the data packets that need to be sent, further comprising:

7. A method of data forwarding, the method comprising:

the adaptation layer of the source relay node determines a data forward packet containing equipment information; the adaptation layer of the source relay node combines the data to be forwarded and then performs packaging processing to obtain a data packet to be sent; or, the adaptation layer of the source relay node packs the data to be forwarded and the serial number of the data to be forwarded to obtain a data packet to be sent;

and the RLC layer of the source relay node sends the data forwarding packet containing the equipment information to the RLC layer of the intermediate relay node.

8. The method according to claim 7, wherein if the data forward packet is a downlink data forward packet, the device information includes a terminal identifier and/or an address of a destination relay node; the destination relay node is a relay node to which the terminal needs to be switched.

9. The method of claim 8, wherein prior to the source relay node adaptation layer determining the data forward packet containing device information, further comprising:

10. A method for forwarding data, the method comprising:

the base station determines downlink data to be forwarded according to a received downlink data packet which is sent by the relay node and aims at the terminal; the base station determines downlink data corresponding to the sequence number in the downlink data packet according to the corresponding relation between the sequence number and the downlink data; the base station takes the determined downlink data as the downlink data to be forwarded; the downlink data to be forwarded is determined by the base station according to the data packet which is determined by the adaptation layer and needs to be sent;

the base station determines receiving equipment according to the terminal identification of the terminal;

and the base station packs the determined downlink data to be forwarded and then sends the downlink data to the receiving equipment.

11. The method of claim 10, further comprising:

12. The method of claim 10, wherein before the base station receives the downlink data packet sent by the relay node, the method further comprises:

13. An apparatus for data forwarding, the apparatus comprising a processor, a memory, and a transceiver;

the processor is used for reading the program in the memory and executing:

receiving a data forward packet; determining the next network equipment on the transmission path according to the equipment information in the data forward packet; determining a data packet to be sent; after determining that the forward packet of the data is forward packet of downlink data, an adaptation layer of the intermediate relay node determines a data packet to be sent according to the forward packet of the data; and sending the determined data packet to the determined network equipment.

14. The apparatus of claim 13,

15. The device of claim 13, wherein the processor is further configured to:

16. The device of claim 13, wherein the processor is further configured to:

17. The device of claim 13, wherein the processor is further configured to:

18. The device of claim 13, wherein the processor is further configured to:

19. An apparatus for data forwarding, the apparatus comprising a processor, a memory, and a transceiver;

the processor is used for reading the program in the memory and executing:

determining a data forward packet containing equipment information through an adaptation layer; the adaptation layer of the source relay node combines the data to be forwarded and then performs packaging processing to obtain a data packet to be sent; or, the adaptation layer of the source relay node packs the data to be forwarded and the serial number of the data to be forwarded to obtain a data packet to be sent; and sending the data forwarding packet containing the equipment information to an RLC layer of an intermediate relay node.

20. The apparatus according to claim 19, wherein the apparatus information includes a terminal identifier and/or an address of a destination relay node if the data forward packet is a downlink data forward packet; the destination relay node is a relay node to which the terminal needs to be switched.

21. The device of claim 19, wherein the processor is further configured to:

22. An apparatus for data forwarding, the apparatus comprising a processor, a memory, and a transceiver;

the processor is used for reading the program in the memory and executing:

determining downlink data to be forwarded according to a received downlink data packet which is sent by a relay node and aims at a terminal; determining downlink data corresponding to the sequence number in the downlink data packet according to the corresponding relation between the sequence number and the downlink data; the downlink data to be forwarded is determined according to a data packet which is determined by an adaptation layer and needs to be sent; taking the determined downlink data as the downlink data to be forwarded; the base station determines receiving equipment according to the terminal identification of the terminal; and the base station packs the determined downlink data to be forwarded and then sends the downlink data to the receiving equipment.

23. The device of claim 22, wherein the processor is further configured to:

24. The device of claim 22, wherein the processor is further configured to:

25. An apparatus for data forwarding, the apparatus comprising:

the receiving module is used for receiving the data forward packet;

the first execution module is used for determining a data packet to be sent; after determining that the forward packet of the data is forward packet of downlink data, an adaptation layer of the intermediate relay node determines a data packet to be sent according to the forward packet of the data;

26. An apparatus for data forwarding, the apparatus comprising:

the second determining module is used for determining the data forward packet containing the equipment information through the adaptation layer; the adaptation layer of the source relay node combines the data to be forwarded and then performs packaging processing to obtain a data packet to be sent; or, the adaptation layer of the source relay node packs the data to be forwarded and the serial number of the data to be forwarded to obtain a data packet to be sent;

27. An apparatus for data forwarding, the apparatus comprising:

a third determining module, configured to determine, according to a received downlink data packet for a terminal sent by a relay node, downlink data to be forwarded; the base station determines downlink data corresponding to the sequence number in the downlink data packet according to the corresponding relation between the sequence number and the downlink data; the base station takes the determined downlink data as the downlink data to be forwarded; the downlink data to be forwarded is determined according to a data packet which is determined by an adaptation layer and needs to be sent;

the second execution module is used for determining the receiving equipment according to the terminal identification of the terminal;

28. A device-readable storage medium for data forwarding, characterized in that it comprises program code for causing a computing device to perform the steps of the method of any of claims 1 to 6 or the steps of the method of any of claims 7 to 9 or the steps of the method of any of claims 10 to 12, when said program code is run on said computing device.