CN107113250B - Data packet forwarding method, wireless relay node and communication system - Google Patents

Abstract

The embodiment of the invention discloses a data packet forwarding method, a wireless relay node and a communication system. The method according to the embodiment of the present invention includes: a wireless relay node receives a first data packet from an upstream node based on a first wireless resource; the wireless relay node obtains the Information about the second wireless resource; the wireless relay node sends a second data packet based on the second wireless resource, and the second data packet is obtained from the first data packet. In the embodiment of the present invention, multiple radio resource scheduling is not required, signaling resource overhead is saved, and efficient data packet forwarding is achieved.

Description

Data packet forwarding method, wireless relay node and communication system

technical field

The invention relates to the technical field of communication, and in particular, to a data packet forwarding method, a wireless relay node and a communication system.

Background technique

The 3rd Generation Partnership Project (3GPP) Long Term Evolution-Advanced (LTE-A) Rel-10/11/12/13 versions are Long Term Evolution (Long Term Evolution, LTE) Rel-8 /9 version enhancement, LTE-A system has higher bandwidth requirements than LTE system, and supports peak data rates of up to 1G/s downlink and 500M/s uplink. In order to meet the requirements of LTE-A, the LTE-A system uses the carrier aggregation (Component Aggregation, CA) technology as its method to expand the system bandwidth, and adopts the multi-antenna enhancement technology (Multiple-Input Multiple-Output, MIMO, Multiple-Input Multiple-Output, MIMO) ) and coordinated multi-point technology (Coordinated Multi-Point, CoMP) to improve data rate and system performance.

Although LTE-A adopts various technologies to increase the data rate, with the rapid development of wireless communication and the generation of ultra-high-speed services (such as high-definition video), the load on the wireless communication network is getting heavier and heavier. How to reduce the load of the network has become a research hotspot, and Device to Device (D2D) has emerged as the times require and has become a key project of the LTE-A Rel-12 version. They can communicate directly with each other without being forwarded by the base station, sharing the data load of the base station. D2D communication can make better use of spectrum resources, improve spectrum utilization and data rate, and at the same time reduce the burden on base stations.

In the LTE-A Rel-13 version, D2D communication needs to study and standardize D2D relay, that is, forward D2D information through wireless relay nodes (such as relay user equipment (UE)). Data packets (service data and / or control information) is partially or fully forwarded to the downstream node (the node that obtains the data packet directly or indirectly from the relay node, which can be a next-hop or multi-hop node, or another wireless relay node or target node), where, The source node refers to the network node that acts as a source to send original data packets, for example, it can be a base station or a UE, and the target node is a network node that acts as a sink to receive data packets, such as a base station or UE, and the wireless relay node is the source node. , A network node other than the target node that participates in data forwarding. As shown in Figure 1, UE1, UE2, and UE3 all play the role of wireless relay nodes, and forward the data of the base station (Evolved Node B, eNB) to UE4, where the cell base station is the source node, and UE4 is the target node. For UE2, the base station and UE1 are upstream nodes, while UE3 and UE4 are downstream nodes. For UE3, the base station, UE1, and UE2 are upstream nodes. , UE4 is the downstream node; it can be seen from the above that to complete the forwarding of data packets to the downstream node, the wireless relay node at least needs to know the first wireless resource of the receiving upstream node and the second wireless resource forwarded to the downstream node.

Currently, in the prior art, the resources for interaction between the wireless relay node and the base station are scheduled by the base station, that is, the receiving resources and the transmitting resources are scheduled by the base station. However, based on the scheduling of common UEs in the prior art, that is, uplink resources (sending resources for UEs) are scheduled by uplink scheduling grant signaling, and downlink resources (receiving resources for UEs) are scheduled by downlink scheduling grant signaling. Therefore, two resource scheduling is required, and the signaling overhead is large. If a new downlink control information (Downlink Control Information, DCI) is designed, and a control command is used to schedule the transmit resource and the receive resource at the same time, it needs to be redesigned, and there is no network coverage. The UE scheduling resources under the

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a data packet forwarding method, a wireless relay node and a communication system, which are used to realize efficient data packet forwarding.

A first aspect of the embodiments of the present invention provides a data packet forwarding method, including:

The wireless relay node receives the first data packet from the upstream node based on the first wireless resource;

obtaining, by the wireless relay node, the information of the second wireless resource according to the correspondence between the first wireless resource and the second wireless resource;

The wireless relay node sends a second data packet based on the second wireless resource, and the second data packet is obtained from the first data packet.

With reference to the first aspect of the embodiment of the present invention, in a first implementation manner of the first aspect of the embodiment of the present invention, the method further includes: acquiring, by the wireless relay node, information of the first wireless resource.

With reference to the first implementation manner of the first aspect of the embodiments of the present invention, in the second implementation manner of the first aspect of the embodiments of the present invention, the information that the wireless relay node acquires the first wireless resource includes:

The wireless relay node receives the information of the first wireless resource configured by the first network node.

With reference to the first implementation manner of the first aspect of the embodiments of the present invention, in the third implementation manner of the first aspect of the embodiments of the present invention, the information that the wireless relay node acquires the first wireless resource includes:

The wireless relay node selects information of the first wireless resource from a resource pool; wherein the resource pool includes information of one or more wireless resources used to receive the first data packet from an upstream node.

With reference to the third implementation manner of the first aspect of the embodiments of the present invention, in the fourth implementation manner of the first aspect of the embodiments of the present invention, the information of the second wireless resource belongs to the resource pool; The resource pool also includes information on one or more radio resources used to transmit the first data packet.

With reference to the first aspect of the embodiments of the present invention or the first implementation manner of the first aspect or the second implementation manner of the first aspect or the third implementation manner of the first aspect or the fourth implementation manner of the first aspect, In a fifth implementation manner of the first aspect of the embodiments of the present invention, the corresponding relationship includes:

a linear relationship between the first resource parameter of the first radio resource and the second resource parameter of the second radio resource; or,

The proportional relationship between the first resource parameter of the first wireless resource and the second resource parameter of the second wireless resource; or,

The modulo relationship between the first resource parameter of the first wireless resource and the second resource parameter of the second wireless resource.

In combination with the first aspect of the embodiments of the present invention or the first implementation manner of the first aspect or the second implementation manner of the first aspect or the third implementation manner of the first aspect or the fourth implementation manner of the first aspect or In a fifth implementation manner of the first aspect, in a sixth implementation manner of the first aspect of the embodiments of the present invention, the first radio resource includes at least a first time domain resource, a first frequency domain resource, and a first code one of a first airspace resource and a second time domain resource; the second wireless resource includes at least one of a second time domain resource, a second frequency domain resource, a second code domain resource, and a second airspace resource.

With reference to the fifth implementation of the first aspect or the sixth implementation of the first aspect of the embodiments of the present invention, in the seventh implementation of the first aspect of the embodiments of the present invention, the first resource parameter is at least Including one of a first position and a first size; the second resource parameter includes at least one of a second position and a second size.

In combination with the first aspect of the embodiments of the present invention or the first implementation manner of the first aspect or the second implementation manner of the first aspect or the third implementation manner of the first aspect or the fourth implementation manner of the first aspect or The fifth implementation manner of the first aspect or the sixth implementation manner of the first aspect or the seventh implementation manner of the first aspect, in the eighth implementation manner of the first aspect of the embodiments of the present invention, the corresponding The relationship is sent by the second network node to the wireless relay node.

In combination with the first aspect of the embodiments of the present invention or the first implementation manner of the first aspect or the second implementation manner of the first aspect or the third implementation manner of the first aspect or the fourth implementation manner of the first aspect or The fifth implementation manner of the first aspect or the sixth implementation manner of the first aspect or the seventh implementation manner of the first aspect or the eighth implementation manner of the first aspect is in the first aspect of the embodiments of the present invention. In a ninth implementation manner, in the time domain, the first radio resource precedes the second radio resource.

In combination with the first aspect of the embodiments of the present invention or the first implementation manner of the first aspect or the second implementation manner of the first aspect or the third implementation manner of the first aspect or the fourth implementation manner of the first aspect or the fifth implementation of the first aspect or the sixth implementation of the first aspect or the seventh implementation of the first aspect or the eighth implementation of the first aspect or the ninth implementation of the first aspect, In a tenth implementation manner of the first aspect of the embodiments of the present invention, the method further includes:

The wireless relay node sends the information of the second wireless resource, so that the downstream node receives the second data packet based on the second wireless resource.

For the downstream node side, the data packet forwarding method includes:

The downstream node receives the second data packet sent by the wireless relay node based on the information of the second wireless resource;

The downstream node acquires the information of the third wireless resource according to the corresponding relationship between the second wireless resource and the third wireless resource, and the third wireless resource is used for forwarding data packets.

Optionally, the downstream node sends a third data packet based on the third radio resource, where the third data packet is obtained from the second data packet.

Optionally, the correspondence between the second radio resource and the third radio resource includes:

a linear relationship between the second resource parameter of the second wireless resource and the third resource parameter of the third wireless resource; or,

The proportional relationship between the second resource parameter of the second wireless resource and the third resource parameter of the third wireless resource; or,

The modulo relationship between the second resource parameter of the second wireless resource and the third resource parameter of the third wireless resource.

Optionally, the second wireless resource includes at least one of a second time domain resource, a second frequency domain resource, a second code domain resource, and a second air domain resource; the third wireless resource includes at least a third time domain resource. One of domain resources, third frequency domain resources, third code domain resources, and third space domain resources. Optionally, the second resource parameter includes at least one of a second position and a second size; the third resource parameter includes at least one of a third position and a third size.

Optionally, in the time domain, the second radio resource precedes the third radio resource.

A second aspect of the embodiments of the present invention provides a wireless relay node, including:

a transceiver for receiving the first data packet from the upstream node based on the first wireless resource;

a processor, configured to acquire information of the second wireless resource according to the correspondence between the first wireless resource and the second wireless resource;

The transceiver is further configured to send a second data packet based on the second wireless resource, where the second data packet is obtained from the first data packet.

With reference to the second aspect of the embodiment of the present invention, in a first implementation manner of the second aspect of the embodiment of the present invention, the transceiver is further configured to receive the information of the first radio resource configured by the first network node.

With reference to the second aspect of the embodiments of the present invention, in a second implementation manner of the second aspect of the embodiments of the present invention, the processor is further configured to select information of the first radio resource from a resource pool; wherein, The resource pool includes information on one or more radio resources for receiving the first data packet from an upstream node.

With reference to the second implementation manner of the second aspect of the embodiments of the present invention, in the third implementation manner of the second aspect of the embodiments of the present invention, the information of the second wireless resource belongs to the resource pool; The resource pool also includes information on one or more radio resources used to transmit the first data packet.

In combination with the second aspect of the embodiments of the present invention or the first implementation manner of the second aspect or the second implementation manner of the second aspect or the third implementation manner of the second aspect, in the second aspect of the embodiments of the present invention In the fourth implementation manner, the corresponding relationship includes:

The linear relationship between the first resource parameter of the first wireless resource and the second resource parameter of the second wireless resource, for example, the first resource parameter of the first wireless resource and the resource parameter of the second wireless resource satisfy the formula N ₂ = aN ₁ +b, where N ₂ is the second resource parameter of the wireless relay node, N ₁ is the first resource parameter of the wireless relay node, a and b are preset parameters or upstream node configuration parameter; or,

The proportional relationship between the first resource parameter of the first wireless resource and the second resource parameter of the second wireless resource, for example, the first resource parameter of the first wireless resource and the second resource parameter of the second wireless resource satisfy the formula N ₂ =cN ₁ , where N ₂ is the second resource parameter of the wireless relay node, N ₁ is the first resource parameter of the wireless relay node, and c is a preset parameter or a parameter configured by an upstream node parameter; or,

The modulo relationship between the first resource parameter of the first wireless resource and the second resource parameter of the second wireless resource, for example, when there is only one first resource parameter of the first wireless resource, the first resource parameter of the first wireless resource is The first resource parameter and the second resource parameter of the second wireless resource may satisfy the formula N ₂ =(d N ₁ )mod N _m , where N ₂ is the second resource parameter of the wireless relay node, and N ₁ is the The first resource parameter of the wireless relay node, d is a preset parameter or a parameter configured by an upstream node, N _m is the maximum value of N ₂ , which is a preset parameter or a parameter configured by an upstream node; another example , when there are multiple first resource parameters of the first radio resource, the first resource parameter of the first radio resource and the second resource parameter of the second radio resource may satisfy the formula: N ₂ =(pN ₁₁ +q N ₁₂ ) mod N _m , where N ₂ is the second resource parameter of the wireless relay node, N ₁₁ and N ₁₂ are the first resource parameter of the wireless relay node, p and q are preset parameters or The parameter configured by the upstream node, N _m is the maximum value of N ₂ , which is a preset parameter or a parameter configured by the upstream node.

Preferably, the parameters a, b, c, d, p, q in the corresponding relationship are set as follows: configurable for wireless relay nodes within the network coverage; for wireless relay nodes outside the network coverage set to a fixed value;

With reference to the third implementation manner of the second aspect or the fourth implementation manner of the second aspect of the embodiments of the present invention, in the fifth implementation manner of the second aspect of the embodiments of the present invention, the first radio resource is at least It includes one of a first time domain resource, a first frequency domain resource, a first code domain resource, and a first space domain resource; the second wireless resource includes at least a second time domain resource, a second frequency domain resource, a second One of the code domain resource and the second air domain resource.

In combination with the second aspect of the embodiments of the present invention or the first implementation manner of the second aspect or the second implementation manner of the second aspect or the third implementation manner of the second aspect or the fourth implementation manner of the second aspect or In a fifth implementation manner of the second aspect, in a sixth implementation manner of the second aspect of the embodiments of the present invention, the first resource parameter includes at least one of a first location and a first size; the first resource parameter includes at least one of a first location and a first size; The second resource parameter includes at least one of a second location and a second size.

In combination with the second aspect of the embodiments of the present invention or the first implementation manner of the second aspect or the second implementation manner of the second aspect or the third implementation manner of the second aspect or the fourth implementation manner of the second aspect or In the fifth implementation manner of the second aspect or the sixth implementation manner of the second aspect, in the seventh implementation manner of the second aspect of the embodiments of the present invention, the corresponding relationship is sent by the second network node to the wireless relay node.

In combination with the second aspect of the embodiments of the present invention or the first implementation manner of the second aspect or the second implementation manner of the second aspect or the third implementation manner of the second aspect or the fourth implementation manner of the second aspect or In the fifth implementation manner of the second aspect or the sixth implementation manner of the second aspect or the seventh implementation manner of the second aspect, in the eighth implementation manner of the second aspect of the embodiments of the present invention, in the time domain above, the first radio resource precedes the second radio resource.

In combination with the second aspect of the embodiments of the present invention or the first implementation manner of the second aspect or the second implementation manner of the second aspect or the third implementation manner of the second aspect or the fourth implementation manner of the second aspect or The fifth implementation manner of the second aspect or the sixth implementation manner of the second aspect or the seventh implementation manner of the second aspect or the eighth implementation manner of the second aspect is in the second aspect of the embodiments of the present invention. In a ninth implementation manner, the transceiver is further configured to send the information of the second wireless resource, so that the downstream node receives the second data packet based on the second wireless resource.

A third aspect of the embodiments of the present invention provides a communication system, including:

The wireless relay node of the second aspect; and

the upstream node and/or the downstream node.

With reference to the first aspect of the embodiments of the present invention, in a first implementation manner of the first aspect of the embodiments of the present invention, the upstream node includes: a base station; or,

The wireless relay node according to the second aspect.

With reference to the first implementation manner of the first aspect of the embodiments of the present invention, in the second implementation manner of the first aspect of the embodiments of the present invention, the downstream node includes:

user equipment.

As can be seen from the above technical solutions, the embodiments of the present invention have the following advantages:

After receiving the first data packet from the upstream node based on the first wireless resource in the embodiment of the present invention, the wireless relay node can obtain the second wireless data packet of the wireless relay node according to the corresponding relationship between the first wireless resource and the second wireless resource. resource, and send the second data packet based on the second radio resource, this process does not require multiple radio resource scheduling, saves signaling resource overhead, and realizes efficient data packet forwarding.

Description of drawings

1 is a schematic diagram of D2D communication in the prior art;

2 is a schematic diagram of another embodiment of a data packet forwarding method in an embodiment of the present invention;

3 is a schematic diagram of another embodiment of a data packet forwarding method in an embodiment of the present invention;

4 is a schematic diagram of another embodiment of a data packet forwarding method in an embodiment of the present invention;

FIG. 5 is a schematic diagram of an embodiment of a wireless relay node in an embodiment of the present invention;

6 is a schematic diagram of an embodiment of a communication system in an embodiment of the present invention;

FIG. 7 is a schematic diagram of another embodiment of the communication system in the embodiment of the present invention.

Detailed ways

The embodiments of the present invention provide a data packet forwarding method, a wireless relay node and a communication system, which saves signaling resource overhead and realizes efficient data packet forwarding.

In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The terms "first", "second", etc. (if present) in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It is to be understood that data so used may be interchanged under appropriate circumstances so that the embodiments described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

In order to facilitate the understanding of the embodiments of the present invention, several elements that will be introduced in the description of the embodiments of the present invention are first introduced here;

D2D scene:

D2D scenarios can be divided into three scenarios: with network coverage, partial network coverage and no network coverage. From the perspective of D2D communication links, in scenarios with network coverage, D2D devices are within the coverage of the base station, and some network coverage scenarios have some D2D devices. Within the coverage of the base station, another part of the D2D devices are not within the coverage of the base station. In a scenario without network coverage, all D2D devices are not within the coverage of the base station. From the perspective of a certain D2D UE, if the UE can hear the signal of the base station, it is a UE within the network coverage; if the UE can hear the signal of the UE within the network coverage, it is a partially covered UE; if the UE cannot receive the first two signals , which is a UE outside the network coverage.

Resource pool:

In the scenario with network coverage, the resource pool is a whole block of wireless resources divided by the base station or upstream node. In the scenario without network coverage, the resource pool is a predefined system bandwidth that D2D devices can obtain.

In this embodiment of the present invention, the location of the wireless resource is the location where the wireless resource is located, and when the wireless resource is the time domain resource, the location of the wireless resource is the location of the subframe/slot/symbol in the time domain, for example, the first time in the time domain Several subframes/slots/symbols; when the radio resource is a frequency domain resource, the position of the radio resource is the position of the frequency domain subcarrier, such as the number of subcarriers in the frequency domain; when the radio resource is a space domain resource, the position of the radio resource is The location is the location of the antenna port in the airspace, such as the number of antenna ports in the airspace; when the wireless resource is a code domain resource, the location of the wireless resource is the location of the code domain code, such as the number of codes in the code domain.

The size of the radio resource refers to the amount of resources occupied by the radio resource. When the radio resource is a time domain resource, the size of the radio resource is the amount of subframes/slots/symbols occupied by the time domain. For example, the time domain occupies several subframes/hours. Slot/symbol; when the wireless resource is a frequency domain resource, the size of the wireless resource is the amount of subcarriers occupied by the frequency domain, for example, several subcarriers are occupied in the frequency domain; when the wireless resource is a space domain resource, the size of the wireless resource is the space domain The amount of occupied antenna ports, for example, several antenna ports are occupied in the air domain; when the wireless resource is a code domain resource, the size of the wireless resource is the amount of codes occupied by the code domain, such as several codes occupied by the code domain. For example, the position of a certain block of radio resources is (size) 2 subframes starting from the 5th subframe, that is, the radio resource actually occupies the 5th and 6th subframes.

In an embodiment of the data packet forwarding method of the present invention, a data packet forwarding method may include: a wireless relay node receives a first data packet from an upstream node based on a first wireless resource; The corresponding relationship between the first wireless resource and the second wireless resource is obtained, and the information of the second wireless resource is obtained; the wireless relay node sends a second data packet based on the second wireless resource, and the second data packet consists of The first data packet is obtained.

Please refer to FIG. 2, which is a schematic flowchart of a data packet forwarding method according to an embodiment of the present invention. Wherein, as shown in FIG. 2 , a data packet forwarding method provided by an embodiment of the present invention may include the following content:

201. A wireless relay node receives a first data packet from an upstream node based on a first wireless resource;

D2D communication is divided into communication forms such as broadcast, multicast and unicast. The upstream node can send data packets to the outside through communication forms such as broadcast, multicast and unicast, while the wireless relay node needs to complete the forwarding of data packets to the downstream node. At least one needs to know the first radio resource of the receiving upstream node and the second radio resource to be forwarded to the downstream node.

In this embodiment, after the wireless relay node acquires the first wireless resource or traverses all possible first wireless resources, the wireless relay node receives the first data packet from the upstream node based on the first wireless resource, and the first wireless resource Used to receive data that needs to be forwarded.

In this embodiment, the information that the wireless relay node obtains the first wireless resource may be: the wireless relay node receives the information of the first wireless resource configured by the first network node; or, the wireless The relay node selects the information of the first wireless resource from the resource pool; wherein the resource pool includes information of one or more wireless resources used for receiving the first data packet from the upstream node, which is not limited here.

Among them, the wireless relay node refers to the network node that participates in data forwarding except for the source node (acting as the network node that the source sends the original data packet) and the target node (acting as the network node for the sink to receive the data packet), such as the relay user equipment. (relay UE), etc., which are not limited here.

202. The wireless relay node acquires the information of the second wireless resource according to the correspondence between the first wireless resource and the second wireless resource;

In some embodiments of the present invention, the corresponding relationship between the first radio resource and the second radio resource may exist in the form of an array, a table, a function relationship, etc. In general, in order to avoid collision, the corresponding relationship of the first radio resource The second radio resource should be unique.

In some embodiments of the present invention, the correspondence between the first wireless resource and the second wireless resource may be sent by the second network node to the wireless relay node, and of course, the wireless relay node may also be locally Pre-set, it may also be that some parameters in the corresponding relationship between the first wireless resource and the second wireless resource (for example, the configurable parameters described below) are sent by the second network node to the wireless relay node. There are no restrictions. In this embodiment, the first network node and the second network node may be the same node, or both may be the upstream nodes described in step 302, and the first network node and the second network node may also be different nodes, for example One is the base station, and the other is the relay UE, which is not limited here.

In this embodiment, according to the information of the first radio resource and the corresponding relationship between the first radio resource and the second radio resource, the information of the second radio resource can be acquired.

203. The wireless relay node sends a second data packet based on the second wireless resource.

After acquiring the information of the second radio resource, the wireless relay node may forward a second data packet based on the second radio resource, where the second data packet is obtained from the first data packet, for example, the second data packet The first data packet is the same as the first data packet, that is, the first data packet is forwarded intact; the second data packet can also be obtained from the first data packet (it can also be understood as obtained from the first data packet), for example, the first data packet is obtained from the first data packet. The second data packet is obtained by adding some information (such as the number of hops, own node ID, etc.) on the basis of the first data packet. For example, the second data packet can also be divided into multiple pieces of the first data packet. The latter part, or the second data packet is composed of multiple data packets including the first data packet, which is not limited here, wherein the form of the second data packet forwarding can be broadcast, multicast and unicast and other forms.

After receiving the first data packet from the upstream node based on the first wireless resource in the embodiment of the present invention, the wireless relay node can obtain the second wireless data packet of the wireless relay node according to the corresponding relationship between the first wireless resource and the second wireless resource. resource, and send the second data packet based on the second radio resource, this process does not require multiple radio resource scheduling, saves signaling resource overhead, and realizes efficient data packet forwarding.

In the embodiment shown in FIG. 2 , the method may further include: the wireless relay node receives the information of the first wireless resource configured by the first network node. Referring to FIG. 3 , a data provided by an embodiment of the present invention Another embodiment of the packet forwarding method may include the following:

301. A wireless relay node acquires information of a first wireless resource;

In this embodiment, the information that the wireless relay node obtains the first wireless resource may be: the wireless relay node receives the information of the first wireless resource configured by the first network node; the first network The signaling of the first wireless resource configured by the node to the wireless relay node to receive data and/or control information may be sent on a specific relay channel, and the specific relay channel is a dedicated relay channel for the wireless relay node Or the relay channel common to all wireless relay nodes, or the signaling of the first wireless resource configured by the first network node to the wireless relay node to receive control information can be sent on a specific relay channel, and the specific The relay channel is a dedicated relay channel for the wireless relay node or a common relay channel for all wireless relay nodes, and the first network node configures the wireless relay node to receive the signaling of the first wireless resource of the data information , and sent on the first wireless resource configured by the first network node to receive the control information for the wireless relay node, which is not limited here.

The information that the wireless relay node acquires the first wireless resource may also be: the wireless relay node selects the information of the first wireless resource from a resource pool; wherein the resource pool includes information for selecting the first wireless resource from an upstream The node receives information of one or more radio resources of the first data packet, which is not limited here.

In this embodiment, the upstream node that sends the information of one or more wireless resources of the first data packet here may be the same or different from the upstream node that sends the first data packet in step 302 below, which is not made here. limited.

In some embodiments of the present invention, the wireless relay node may receive the data packet from the upstream node based on the existing first wireless resource, without the step of acquiring the first wireless resource, which is not limited here.

302. The wireless relay node receives the first data packet from the upstream node based on the first wireless resource;

D2D communication is divided into communication forms such as broadcast, multicast and unicast. The upstream node can send data packets to the outside through communication forms such as broadcast, multicast and unicast, while the wireless relay node needs to complete the forwarding of data packets to the downstream node. At least one needs to know the first radio resource of the receiving upstream node and the second radio resource to be forwarded to the downstream node.

In this embodiment, after the wireless relay node acquires the first wireless resource, the wireless relay node receives the first data packet from the upstream node based on the first wireless resource, and the first wireless resource is used to receive the data packet to be forwarded .

Among them, the wireless relay node refers to the network node that participates in data forwarding except for the source node (acting as the network node that the source sends the original data packet) and the target node (acting as the network node for the sink to receive the data packet), such as the relay user equipment. (Relay UE), etc., which are not limited here.

303. The wireless relay node acquires the information of the second wireless resource according to the correspondence between the first wireless resource and the second wireless resource;

In some embodiments of the present invention, the first radio resource may include at least one of a first time domain resource, a first frequency domain resource, a first code domain resource, and a first space domain resource; the second radio resource At least one of a second time domain resource, a second frequency domain resource, a second code domain resource, and a second space domain resource may be included.

In some embodiments of the present invention, the first resource parameter of the first radio resource may include at least one of a first position and a first size; the second resource parameter may include at least a second position and a second one of the sizes.

In some embodiments of the present invention, the correspondence between the first wireless resource and the second wireless resource may be sent by the second network node to the wireless relay node, and of course, the wireless relay node may also be locally Pre-set, it may also be that some parameters in the corresponding relationship between the first wireless resource and the second wireless resource (for example, the configurable parameters described below) are sent by the second network node to the wireless relay node. There is no limit. In this embodiment, the first network node and the second network node may be the same node, or both may be the upstream nodes described in step 302, and the first network node and the second network node may also be different nodes, for example One is the base station, and the other is the relay UE, which is not limited here.

In some embodiments of the present invention, the corresponding relationship between the first radio resource and the second radio resource may exist in the form of an array, a table, a function relationship, etc. In general, in order to avoid collision, the corresponding relationship of the first radio resource The second radio resource should be unique.

The corresponding relationship between the first radio resource and the second radio resource may be a table relationship, that is, the second radio resource is obtained by looking up the table of the first radio resource, and the first radio resource can uniquely obtain a second radio resource according to the look-up table, It is generally not recommended that different first radio resources point to the same second radio resource at the same time to avoid collision. Of course, one first radio resource can also obtain two or more second radio resources according to the table lookup, and which one to transmit among the two or more transmission resources is determined by the Relay UE, which is not limited here.

In some embodiments of the present invention, the corresponding relationship may include:

The linear relationship between the first resource parameter of the first wireless resource and the second resource parameter of the second wireless resource; or, the first resource parameter of the first wireless resource and the second resource parameter of the second wireless resource. The proportional relationship of resource parameters; or, the modulo relationship between the first resource parameter of the first radio resource and the second resource parameter of the second radio resource.

The specific form of the linear relationship between the first resource parameter of the first radio resource and the first resource parameter of the second radio resource may be as follows:

The first resource parameter of the first wireless resource and the resource parameter of the second wireless resource satisfy the formula N ₂ =aN ₁ +b, where N ₂ is the second resource parameter of the wireless relay node, and N ₁ is the wireless relay node The first resource parameter of the relay node, a and b are preset parameters or parameters configured by the upstream node;

For example, when the first radio resource is the first position or the first size of one of the first time domain resource, the first frequency domain resource, the first code domain resource, and the first space domain resource, according to the linear relationship, the The second resource parameter of the second wireless resource corresponding to the first resource parameter of a wireless resource. Specifically, for example, when the first resource parameter is the first size, the second resource parameter of the second wireless resource is obtained according to the linear relationship. , the second resource parameter is the second size, such as Size2=aSize1+b, and the first resource parameter and the second resource parameter can also be the first position and the second position respectively, such as the first wireless resource and the second wireless resource. When the resources are all time domain resources, N _t2 =aN _t1 +b, and when the first wireless resource and the second wireless resource are both frequency domain resources, N _f2 =aN _f1 +b; of course, the second resource is obtained according to the linear relationship The parameter may also be, when the first resource parameter is the first size, the second resource parameter is obtained according to the linear relationship, and the second resource parameter is the first position;

It can be understood that the first radio resource may also be a resource of a different type from the second radio resource. For example, when the first radio resource is the first time domain resource, the second radio resource may also be the second frequency domain resource, One or more of the second air domain resource and the second code domain resource. In this case, the first resource parameter is the first size or the first position, and the second resource parameter can also be the second size and the second position. Specifically, For example, N _t2 =aN _f1 +b, or N _f2 =aN _t1 +b, which is not limited here. By analogy, when the first resource parameter is the first position or the first size of one of the first frequency domain resource, the first code domain resource, and the first air domain resource, the first resource parameter is obtained according to the linear relationship. When the corresponding second resource parameter is similar to that of the first radio resource being the first time domain resource, details are not described herein again.

The specific form of the proportional relationship between the first resource parameter of the first radio resource and the second resource parameter of the second radio resource may be as follows:

The first resource parameter of the first wireless resource and the second resource parameter of the second wireless resource satisfy the formula N ₂ =cN ₁ , where N ₂ is the second resource parameter of the wireless relay node, and N ₁ is the wireless relay node The first resource parameter of the relay node, c is a preset parameter or a parameter configured by an upstream node, where the parameter c may be a fraction or an integer;

For example, when the first radio resource is the first position or the first size of one of the first time domain resource, the first frequency domain resource, the first code domain resource, and the first space domain resource, according to the proportional relationship, the The second resource parameter corresponding to the first resource parameter, specifically, for example, when the first resource parameter is the first size, the second resource parameter is obtained according to the linear relationship, and the second resource parameter is the second size, for example, Size2 =cSize1, of course, obtaining the second resource parameter corresponding to the first resource parameter according to the ratio relationship may also be, when the first resource parameter is the first position, obtain the second resource parameter according to the ratio relationship, the The second resource parameter is the second location. For example, when the first radio resource and the second radio resource are both time domain resources, N _t2 =cN _t1 , and when the first radio resource and the second radio resource are both frequency domain resources, N _f2 =cN _f1 ;

It can be understood that the first radio resource may also be a resource of a different type from the second radio resource. For example, when the first radio resource is the first time domain resource, the second radio resource may also be the second frequency domain resource, One or more of the second air domain resource and the second code domain resource. In this case, the first resource parameter is the first size or the first position, and the second resource parameter can also be the second size and the second position. Specifically, , such as N _f2 =cN _t1 or N _t2 =cN _f1 , which is not limited here, and so on, the first resource parameter is one of the first frequency domain resource, the first code domain resource and the first air domain resource. At the first position or the first size, when the second resource parameter corresponding to the first resource parameter is obtained according to the proportional relationship, it is similar to when the first radio resource is the first time domain resource, and details are not repeated here;

The specific form of the modulo relationship between the first resource parameter of the first radio resource and the second resource parameter of the second radio resource may be as follows:

(1) When there is only one first resource parameter of the first radio resource, the first resource parameter of the first radio resource and the second resource parameter of the second radio resource may satisfy the formula N ₂ =(d N ₁ )mod N _m , where N ₂ is the second resource parameter of the wireless relay node, N ₁ is the first resource parameter of the wireless relay node, d is a preset parameter or a parameter configured by an upstream node, and N _m is the maximum value of _N2 , which is a preset parameter or a parameter configured by an upstream node; the first radio resource may also be a resource of the same type as the second radio resource, for example, the first radio resource is the first time domain resource , the second radio resource is the second time domain resource, the above formula is N _t2 =(d N _t1 )mod N _m , for another example, when the first radio resource is the first frequency domain resource, the second radio resource is the second In the case of frequency domain resources, the above formula is N _f2 =(d N _f1 )mod N _m , at this time, the first resource parameter may be the first size or the first position, and the second resource parameter may be the second size or the second position, There is no specific limitation.

It can be understood that the first radio resource may also be a resource of a different type from the second radio resource. For example, when the first radio resource is the first time domain resource, the second radio resource may also be the second frequency domain resource, The second air domain resource, one or more of the second code domain resources, specifically, for example, N _t2 =(d N _f1 )mod N _m or N _f2 =(d N _t1 )mod N _m , in this case, the first A resource parameter may also be a first size or a first position, and a second resource parameter may be a second size or a second position, which is not limited here.

(2) When there are multiple first resource parameters of the first radio resource, the first resource parameter of the first radio resource and the second resource parameter of the second radio resource may satisfy the formula:

N ₂ =(pN ₁₁ +q N ₁₂ ) mod N _m ;

Wherein, N ₂ is the second resource parameter of the wireless relay node, N ₁₁ and N ₁₂ are the first resource parameter of the wireless relay node, p and q are preset parameters or parameters configured by the upstream node , N _m is the maximum value of N ₂ , which is a preset parameter or a parameter configured by an upstream node.

For example, when the first resource parameter of the first radio resource includes the first position or the first size of two of the first time domain resource, the first frequency domain resource, the first code domain resource and the first space domain resource, according to the The second resource parameter is obtained by taking the modulo relationship. Specifically, for example, when the first resource parameter is the first size of the first time domain resource and the first size of the first frequency domain resource, the second resource parameter is obtained according to the modulo relationship. , the second resource parameter may be the second size of the second time domain resource or the second size of the second frequency domain resource, for example, there are several modulo methods as follows:

(1) When the first radio resource includes the first time domain resource and the first frequency domain resource, according to the first resource parameter (first size or first position) of the first time domain resource, the first frequency domain resource A resource parameter (first size or first position) obtains a second resource parameter (second size or second position) of the second time domain resource: N _t2 =(pN _t1 +q N _f1 )mod N _m ;

(2) When the first radio resource includes the first time domain resource and the first frequency domain resource, according to the first resource parameter (first size or first position) of the first time domain resource, the first resource parameter of the first frequency domain resource A resource parameter (first size or first position) obtains a second resource parameter (second size or second position) of the second frequency domain resource: N _f2 =(pN _t1 +q N _f1 )mod N _m ;

By analogy, the first resource parameter includes the first position or the first size of any two of the first time-domain resource, the first frequency-domain resource, the first code-domain resource, and the first spatial-domain resource (any two of the above-mentioned resources). The parameter can be the first position of the resource at the same time, such as the first position of the first frequency domain resource and the first position of the first time domain resource; it can also be the first size of the resource at the same time, such as the first position of the first frequency domain resource. A size, the first size of the first time domain resource; one may be the first position of the resource, and the other may be the first size of the resource, such as the first position of the first frequency domain resource, the first position of the first time domain resource size, etc.), when the second resource parameter is obtained according to the modulo relationship, the obtained second resource parameter may include at least a second time domain resource, a second frequency domain resource, a second code domain resource, and a second space domain resource. The size or position of one of them is not limited here;

In the above implementation manner, the first resource parameter according to the first radio resource includes the first time domain resource (first size or first position), the first frequency domain resource (first size or first position), the first code domain One or both of the resource (the first size or the first position) and the first airspace resource (the first size or the first position) are exemplified to obtain the second resource parameter of the second radio resource, the second radio resource The second resource parameters of the and one or both of the second airspace resource (the second size or the second position), it can be understood that the first resource parameter may also include the first resource parameter including the first time domain resource (the first size or the second position). more of a first position), a first frequency domain resource (first size or first position), a first code domain resource (first size or first position), and a first spatial resource (first size or first position) to obtain at least one of the second resource parameters of the second radio resource, which is not limited here.

When the first resource parameter is the first size and the second resource parameter is the second size, the above-mentioned various correspondences need to cover at least the following scenarios:

The first size is equal to the receiving second size, that is, the wireless relay node directly forwards the upstream data packet as it is;

The first size is slightly larger than the second size, that is, the wireless relay node adds some information on the basis of the upstream data packet and forwards it, and the additional information can include the hop count, the ID of its own node, and other information of its own node, etc.;

The first size is a fractional or multiple relationship of the second size, that is, the wireless relay node divides the upstream data packet into multiple blocks for transmission, or combines multiple upstream data packets into one data packet for transmission.

In some embodiments of the present invention, the correspondence between the first wireless resource and the second wireless resource in the wireless relay node may have multiple correspondences, such as in an array, a table, a function relation, etc. more than one, wherein the functional relationship may also include one or more; when there are multiple correspondences between the first wireless resource and the second wireless resource in the wireless relay node, each correspondence There is a number (such as 0, 1, 2, 3, etc.), or priority, which specifies the usage scenarios or usage priorities of these multiple correspondences. For example, the wireless relay node is used when there is network coverage. For the corresponding relationship of the above-mentioned proportional relationship, in the case of no network coverage, use the corresponding relationship in the table to perform search, etc., which is not limited here.

In some embodiments of the present invention, when there is a linear relationship between the first resource parameter of the first radio resource and the first resource parameter of the second radio resource; or, the first resource parameter of the first radio resource is the same as the The proportional relationship between the second resource parameters of the second radio resource; or, when the modulo relationship between the first resource parameter of the first radio resource and the second resource parameter of the second radio resource, the corresponding The relationship can be fixed in the protocol, but the parameters in the above corresponding relationship, a, b, c, d, p, q as described above, can be set as follows:

(1) Configurable for wireless relay nodes within network coverage;

(2) It can be set as a fixed value for wireless relay nodes outside the network coverage;

In some embodiments of the present invention, when the information that the wireless relay node acquires the first wireless resource is: when the wireless relay node selects the information of the first wireless resource from a resource pool, the second wireless resource The information of the wireless resource can also be selected from the resource pool, that is, the information of the second wireless resource belongs to the resource pool; wherein, the resource pool further includes one or more data packets for sending the first data packet. information about radio resources. It can be understood that, in practical applications, the resource pool can also be configured as two resource pools with different attributes, one for selecting the information of the first radio resource, and the other for selecting the information of the second radio resource, They are not shared among them, and are not limited here.

In some embodiments of the present invention, in the time domain, the first radio resource precedes the second radio resource.

304. The wireless relay node sends a second data packet based on the second wireless resource.

After acquiring the information of the second radio resource, the wireless relay node may forward a second data packet based on the second radio resource, where the second data packet is obtained from the first data packet, for example, the second data packet The packet is the same as the first data packet, that is, the first data packet is forwarded intact, and the second data packet can also be obtained from the first data packet. For example, the second data packet is based on the first data packet. , obtained after adding some information (such as hop number, own node ID, etc.), and for example, the second data packet can also be a part of the first data packet divided into multiple blocks, or the second data packet is composed of The combination of multiple data packets including the first data packet is not limited here, and the forwarding form of the second data packet can be in the form of broadcast, multicast, and unicast.

In some embodiments of the present invention, the wireless relay node may further send information of the second wireless resource, so that the downstream node receives the second data packet based on the second wireless resource.

On the downstream node side, the data packet forwarding method includes:

receiving a second data packet sent by the wireless relay node based on the second wireless resource;

The downstream node acquires the information of the third wireless resource according to the corresponding relationship between the second wireless resource and the third wireless resource, and the third wireless resource is used for forwarding data packets.

Optionally, the downstream node sends a third data packet based on the third radio resource, where the third data packet is obtained from the second data packet, for example, the third data packet is the same as the second data packet , that is, the second data packet is forwarded intact, the third data packet can also be based on the second data packet, with some additional information (such as hop count, own node ID and other information), the third data packet It may also be a part of the second data packet divided into multiple blocks, or the third data packet is synthesized from a plurality of data packets including the second data packet, which is not limited here.

Optionally, the correspondence between the second radio resource and the third radio resource includes:

a linear relationship between the second resource parameter of the second wireless resource and the third resource parameter of the third wireless resource; or,

The proportional relationship between the second resource parameter of the second wireless resource and the third resource parameter of the third wireless resource; or,

The modulo relationship between the second resource parameter of the second wireless resource and the third resource parameter of the third wireless resource.

Optionally, the second wireless resource includes at least one of a second time domain resource, a second frequency domain resource, a second code domain resource, and a second air domain resource; the third wireless resource includes at least a third time domain resource. One of domain resources, third frequency domain resources, third code domain resources, and third space domain resources. Optionally, the second resource parameter includes at least one of a second position and a second size; the third resource parameter includes at least one of a third position and a third size.

Optionally, in the time domain, the second radio resource precedes the third radio resource.

Optionally, the downstream node sends the information of the third wireless resource, so that the further downstream node receives the third data packet based on the third wireless resource.

In the downstream node, the information of the third wireless resource is obtained according to the corresponding relationship between the second wireless resource and the third wireless resource. Repeat.

In order to facilitate better understanding of the technology, the following embodiments describe in detail the data packet forwarding methods described in the foregoing embodiments in a specific application scenario. Referring to FIG. 4, another embodiment of a data packet forwarding method provided by an embodiment of the present invention may include the following content:

401. UE2 receives the information of the receiving resource configured by UE1;

In this embodiment, the first radio resource is a reception resource, that is, a radio resource used to receive data to be forwarded; the radio relay node is a UE, and the upstream node is another UE. It can be understood that in other aspects of the present invention In the embodiment, the wireless relay node may also be other relay devices that forward data packets, and the upstream node may also be other communication devices, such as base stations, etc., which are not limited here.

The information that the UE2 obtains the receiving resource may be: the UE2 receives the information of the receiving resource configured by the UE1; the signaling of the data receiving resource configured by the UE1 to the UE2 may be sent on a specific relay channel, so The specific relay channel is a dedicated relay channel for UE2 or a common relay channel for all wireless relay nodes, and may also be sent on the control channel of the receiving resource configured by UE1 to UE2, which is not limited here.

The information that the UE2 obtains the receiving resource may also be: the information that the UE2 selects the receiving resource from a resource pool; wherein the resource pool includes one or more data packets used for receiving the first data packet from the UE1. The information of multiple radio resources is not limited here.

In this embodiment, the UE1 that sends the information of one or more radio resources of the first data packet here may be the same or different from the upstream node that sends the first data packet in step 402. The upstream node of the first data packet is also UE1 as an example, which is not limited here.

In some embodiments of the present invention, UE2 may receive data packets from the upstream node UE1 based on the existing receiving resources, and the step of acquiring the receiving resources from UE1 is not required here, which is not limited here.

402. UE2 receives a first data packet from UE1 based on the receiving resource;

D2D communication is divided into communication forms such as broadcast, multicast and unicast. UE1 can send data packets to the outside through communication forms such as broadcast, multicast and unicast, while UE2 needs to complete the forwarding of data packets to downstream nodes (such as UE3). At least one needs to know the receiving resources of the receiving UE1 and the sending resources forwarded to the UE3, where the sending resources are used to send the control information and/or data received from the upstream node.

In this embodiment, after UE2 acquires the receiving resource, UE2 receives the first data packet from UE1 based on the receiving resource, and the receiving resource is used to receive the data to be forwarded.

403. UE2 obtains the information of the sending resource according to the corresponding relationship between the receiving resource and the sending resource;

In this embodiment, the second radio resource is a sending resource, and the sending resource is used for sending control information and/or data received from an upstream node.

In some embodiments of the present invention, the receiving resources may include at least one of a first time domain resource, a first frequency domain resource, a first code domain resource, and a first space domain resource; the sending resource may include at least one One of two time domain resources, second frequency domain resources, second code domain resources and second space domain resources.

In some embodiments of the present invention, the first resource parameter of the receiving resource may include at least one of a first position and a first size; the second resource parameter of the sending resource may include at least a second position and a first size. One of two sizes.

In some embodiments of the present invention, the corresponding relationship between the receiving resources and the sending resources may be sent to the UE2 by the base station, the core network or the upstream node. Of course, the corresponding relationship between the receiving resources and the sending resources may be preset locally by the UE2, or may be Some parameters (for example, the configurable parameters described below) in the corresponding relationship between the receiving resources and the sending resources are sent by the upstream node to the wireless relay node, which is not limited here.

In some embodiments of the present invention, the corresponding relationship between the receiving resource and the sending resource may exist in the form of an array, a table, a function relationship, etc. In general, in order to avoid collision, the sending resource corresponding to the receiving resource should be unique. .

The corresponding relationship between the receiving resource and the sending resource can be a table relationship, that is, the sending resource is obtained by looking up the receiving resource, and a receiving resource can uniquely obtain one sending resource according to the lookup table. It is generally not recommended for different receiving resources to point to the same resource at the same time. Send resources to avoid collisions. Of course, one receiving resource can obtain two or more sending resources according to the look-up table, and which one to send among the two or more sending resources is determined by the Relay UE.

In some embodiments of the present invention, the corresponding relationship may include:

The linear relationship between the first resource parameter of the receiving resource and the second resource parameter of the sending resource; or the proportional relationship between the first resource parameter of the receiving resource and the second resource parameter of the sending resource; or , the modulo relationship between the first resource parameter of the receiving resource and the second resource parameter of the sending resource.

The specific form of the linear relationship between the first resource parameter of the receiving resource and the first resource parameter of the sending resource may be as follows:

The first resource parameter of the receiving resource and the resource parameter of the sending resource satisfy the formula N ₂ =aN ₁ +b, where N ₂ is the second resource parameter of the UE2, N ₁ is the first resource parameter of the UE2, a , b is a preset parameter;

For example, when the receiving resource is the first position or the first size of one of the first time domain resource, the first frequency domain resource, the first code domain resource, and the first spatial domain resource, the linear relationship with the receiving resource is obtained according to the linear relationship. The second resource parameter of the sending resource corresponding to the first resource parameter, specifically, for example, when the first resource parameter is the first size, the second resource parameter of the sending resource is obtained according to the linear relationship, and the second resource parameter is the first resource parameter. Two sizes, such as Size2=aSize1+b, and the first resource parameter and the second resource parameter can also be the first position and the second position respectively. For example, when the receiving resource and the sending resource are both time domain resources, N _t2 =aN _t1 +b, when both the receiving resource and the sending resource are frequency domain resources, N _f2 =aN _f1 +b; of course, obtaining the second resource parameter according to the linear relationship can also be, when the first resource parameter is the first size, obtaining a second resource parameter according to the linear relationship, where the second resource parameter is the first position;

It can be understood that the receiving resources can also be resources of different types from the sending resources. For example, when the receiving resources are the first time domain resources, the sending resources can also be the second frequency domain resources, the second space domain resources, the second code One or more of domain resources, in this case, the first resource parameter is the first size or the first position, and the second resource parameter can also be the second size and the second position, specifically, N _t2 =aN _f1 + b, or N _f2 =aN _t1 +b, which is not limited here. By analogy, when the first resource parameter is the first position or the first size of one of the first frequency domain resource, the first code domain resource, and the first air domain resource, the first resource parameter is obtained according to the linear relationship. When the corresponding second resource parameter is similar to that the receiving resource is the first time domain resource, details are not described herein again.

The specific form of the proportional relationship between the first resource parameter of the receiving resource and the second resource parameter of the sending resource may be as follows:

The first resource parameter of the receiving resource and the second resource parameter of the sending resource satisfy the formula N ₂ =cN ₁ , where N ₂ is the second resource parameter of the UE2, N ₁ is the first resource parameter of the UE2, and c It is a parameter configured for a preset parameter or an upstream node, where the parameter c can be a fraction or an integer;

For example, when the receiving resource is the first position or the first size of one of the first time domain resource, the first frequency domain resource, the first code domain resource, and the first space domain resource, according to the proportional relationship The second resource parameter corresponding to the resource parameter, specifically, when the first resource parameter is the first size, the second resource parameter is obtained according to the linear relationship, and the second resource parameter is the second size, for example, Size2=cSize1 , of course, obtaining the second resource parameter corresponding to the first resource parameter according to the ratio relationship may also be, when the first resource parameter is the first position, obtain the second resource parameter according to the ratio relationship, the second resource parameter is obtained according to the ratio relationship. The resource parameter is the second position, for example, when the receiving resource and the sending resource are both time domain resources, N _t2 =cN _t1 , and when the receiving resource and the sending resource are both frequency domain resources, N _f2 =cN _f1 ; The resource may also be a resource of a different type from the sending resource. For example, when the receiving resource is the first time domain resource, the sending resource may also be one of the second frequency domain resource, the second air domain resource, and the second code domain resource. At this time, the first resource parameter is the first size or the first position, and the second resource parameter can also be the second size and the second position. Specifically, for example, N _f2 =cN _t1 or N _t2 =cN _f1 , which is not limited here, and so on, when the first resource parameter is the first position or the first size of one of the first frequency domain resource, the first code domain resource and the first air domain resource, according to the proportional relationship When the second resource parameter corresponding to the first resource parameter is obtained, it is similar to when the received resource is the first time domain resource, and details are not repeated here;

The specific form of the modulo relationship between the first resource parameter of the receiving resource and the second resource parameter of the sending resource may be as follows:

(1) When there is only one first resource parameter of the receiving resource, the first resource parameter of the receiving resource and the second resource parameter of the sending resource may satisfy the formula N ₂ =(d N ₁ )mod N _m , where N ₂ is the second resource parameter of the UE2, N1 is the _first resource parameter of the UE2, d is a preset parameter or a parameter configured by an upstream node, N _m is the maximum value of _N2 , which is a preset The parameter of the parameter or the parameter configured by the upstream node; the receiving resource can also be the same type of resource as the sending resource. For example, if the receiving resource is the first time domain resource and the sending resource is the second time domain resource, the above formula is N _t2 =( dN _t1 )mod N _m , for another example, when the receiving resource is the first frequency domain resource and the transmitting resource is the second frequency domain resource, the above formula is N _f2 =(d N _f1 )mod N _m , in this case, the first The resource parameter may be the first size or the first position, and the second resource parameter may be the second size or the second position, which is not specifically limited.

It can be understood that the receiving resources can also be resources of different types from the sending resources. For example, when the receiving resources are the first time domain resources, the sending resources can also be the second frequency domain resources, the second space domain resources, the second code One or more of domain resources, specifically, for example, N _t2 =(d N _f1 )mod N _m or N _f2 =(d N _t1 )mod N _m , in this case, the first resource parameter can also be the first resource parameter. A size or a first position, and the second resource parameter may be a second size or a second position, which is not limited here.

(2) When there are multiple first resource parameters of the receiving resource, the first resource parameter of the receiving resource and the second resource parameter of the sending resource may satisfy the formula:

N ₂ =(pN ₁₁ +q N ₁₂ ) mod N _m ;

Wherein, N ₂ is the second resource parameter of the UE2, N ₁₁ and N ₁₂ are the first resource parameter of the UE2, p and q are preset parameters or parameters configured by the upstream node, and N _m is N ₂ The maximum value of , which is a preset parameter or a parameter configured by an upstream node.

For example, when the first resource parameter of the received resource includes the first position or the first size of two of the first time-domain resource, the first frequency-domain resource, the first code-domain resource, and the first spatial-domain resource, according to the modulo relationship to obtain the second resource parameter, specifically, for example, when the first resource parameter is the first size of the first time domain resource and the first size of the first frequency domain resource, the second resource parameter is obtained according to the modulo relationship, the The second resource parameter may be the second size of the second time domain resource or the second size of the second frequency domain resource, for example, there are several modulo methods as follows:

(1) When the receiving resource includes the first time domain resource and the first frequency domain resource, obtain the second size of the second time domain resource according to the first size of the first time domain resource and the first size of the first frequency domain resource : N _t2 =(pN _t1 +q N _f1 )mod N _m ;

(2) When the receiving resource includes the first time domain resource and the first frequency domain resource, obtain the second size of the second frequency domain resource according to the first size of the first time domain resource and the first size of the first frequency domain resource : N _f2 =(pN _t1 +q N _f1 )mod N _m ;

By analogy, the first resource parameter includes the first position or the first size of any two of the first time-domain resource, the first frequency-domain resource, the first code-domain resource, and the first spatial-domain resource (any two of the above-mentioned resources). The parameter can be the first position of the resource at the same time, such as the first position of the first frequency domain resource and the first position of the first time domain resource; it can also be the first size of the resource at the same time, such as the first position of the first frequency domain resource. A size, the first size of the first time domain resource; one may be the first position of the resource, and the other may be the first size of the resource, such as the first position of the first frequency domain resource, the first position of the first time domain resource size, etc.), when the second resource parameter is obtained according to the modulo relationship, the obtained second resource parameter may include at least a second time domain resource, a second frequency domain resource, a second code domain resource, and a second space domain resource. The size or position of one of them is not limited here;

In the above implementation manner, the first resource parameter according to the received resource includes a first time domain resource (a first size or a first position), a first frequency domain resource (a first size or a first position), a first code domain resource ( One or both of the first size or the first position) and the first airspace resource (the first size or the first position) are exemplified, and the second resource parameter of the sending resource is obtained, and the second resource parameter of the sending resource is The second time domain resource (the second size or the second position), the second frequency domain resource (the second size or the second position), the second code domain resource (the second size or the second position), and the second spatial domain resource ( One or both of the second size or the second position), it can be understood that the first resource parameter may further include that the first resource parameter includes a first time domain resource (a first size or a first position), a first resource More parameters in the frequency domain resource (first size or first position), the first code domain resource (first size or first position), and the first space domain resource (first size or first position), obtain the At least one of the second resource parameters of the sending resource is not limited here.

When the first resource parameter is the first size and the second resource parameter is the second size, the above-mentioned various correspondences need to cover at least the following scenarios:

The first size is equal to receiving the second size, that is, UE2 directly forwards the upstream data packet as it is.

The first size is slightly larger than the second size, that is, UE2 adds some information to the upstream data packet and forwards it, and the additional information may include hop count, ID of its own node, other information of its own node, and so on.

The first size is a fractional or multiple relationship of the second size, that is, the UE2 divides the upstream data packet into multiple blocks for transmission, or combines multiple upstream data packets into one data packet for transmission.

In some embodiments of the present invention, the correspondence between the receiving resource and the sending resource in the UE2 may have multiple correspondences, such as multiple correspondences in an array, a table, a functional relationship, etc., wherein the functional relationship It may also include one or more; when there are multiple correspondences between the receiving resources and the sending resources in the UE2, each correspondence may have a number (such as 0, 1, 2, 3.). , etc.), or priority, which specifies the usage scenarios or usage priorities of these multiple correspondences. For example, UE2 uses the above-mentioned corresponding relationship in the case of network coverage, and in the case of no network coverage, uses The correspondence between tables, searching, etc., are not limited here.

In some embodiments of the present invention, when there is a linear relationship between the first resource parameter of the receiving resource and the first resource parameter of the sending resource; or, the first resource parameter of the receiving resource and the first resource parameter of the sending resource have a linear relationship; The proportional relationship between the two resource parameters; or, when the first resource parameter of the receiving resource and the second resource parameter of the sending resource have a modulo relationship, the corresponding relationship may be fixed in the protocol, but the above-mentioned corresponding relationship The parameters of , a, b, c, d, p, q as described above can be set as follows:

(3) Configurable for UEs within network coverage;

(4) It can be set to a fixed value for UEs outside the network coverage;

In some embodiments of the present invention, when UE2 obtains the information of the receiving resource: when the UE2 selects the information of the receiving resource from a resource pool, the information of the sending resource may also be obtained from the resource pool. Selection, that is, the information on the sending resource belongs to the resource pool; wherein, the resource pool further includes information on one or more wireless resources used for sending the first data packet. It can be understood that, in practical applications, the resource pool can also be configured as two resource pools with different attributes, one is used to select the information of the receiving resource, such as the receiving resource pool, and the other is used to select the information of the sending resource. , such as sending resource pools, they are not shared among them, which is not limited here.

In some embodiments of the present invention, the receiving resource precedes the sending resource in the time domain.

404. UE2 sends a second data packet based on the sending resource.

In this embodiment, the second data packet is obtained from the first data packet; after obtaining the information of the sending resource, the UE2 can forward the second data packet based on the sending resource, and the second data packet is obtained by the The first data packet is obtained, for example, the second data packet is the same as the first data packet, that is, the first data packet is forwarded as it is, and the second data packet can also be obtained from the first data packet, for example The second data packet is obtained by adding some information (such as the number of hops, own node ID, etc.) on the basis of the first data packet. For example, the second data packet may also be divided into multiple pieces of the first data packet. The part after the block, or the second data packet is composed of multiple data packets including the first data packet, which is not limited here, and the forwarding form can be in the form of broadcast, multicast, and unicast.

In some embodiments of the present invention, the UE2 may also send the information of the sending resource, so that a downstream node (eg, UE3) receives the second data packet based on the sending resource.

The following describes an embodiment of a wireless relay node in the embodiment of the present invention. Referring to FIG. 5, an embodiment of the wireless relay node 500 in the embodiment of the present invention includes:

a transceiver 501, configured to receive a first data packet from an upstream node based on a first wireless resource;

A processor 502, configured to acquire information of the second wireless resource according to the correspondence between the first wireless resource and the second wireless resource;

The transceiver 501 is further configured to send a second data packet based on the second wireless resource, where the second data packet is obtained from the first data packet.

In this embodiment of the present invention, after the transceiver 501 receives the first data packet from the upstream node based on the first wireless resource, that is, the processor 502 may obtain the first data packet of the wireless relay node according to the corresponding relationship between the first wireless resource and the second wireless resource. Two radio resources, the transceiver 501 sends the second data packet based on the second radio resource, this process does not require multiple radio resource scheduling, saves signaling resource overhead, and realizes efficient data packet forwarding.

Optionally, the transceiver 501 may also be configured to receive the information of the first radio resource configured by the first network node.

Optionally, the processor 502 may also be configured to select the information of the first wireless resource from a resource pool; wherein the resource pool includes one or more data packets for receiving the first data packet from an upstream node. information about radio resources.

Optionally, the information of the second radio resource belongs to the resource pool; wherein, the resource pool further includes information of one or more radio resources used for sending the first data packet.

Optionally, the corresponding relationship may include:

a linear relationship between the first resource parameter of the first radio resource and the second resource parameter of the second radio resource; or,

The proportional relationship between the first resource parameter of the first wireless resource and the second resource parameter of the second wireless resource; or,

The modulo relationship between the first resource parameter of the first wireless resource and the second resource parameter of the second wireless resource.

Optionally, the first wireless resource includes at least one of a first time domain resource, a first frequency domain resource, a first code domain resource, and a first air domain resource; the second wireless resource includes at least a second time domain resource. One of the domain resources, the second frequency domain resources, the second code domain resources and the second air domain resources.

Optionally, the first resource parameter includes at least one of a first position and a first size; the second resource parameter includes at least one of a second position and a second size.

Optionally, the corresponding relationship is sent by the second network node to the wireless relay node.

Optionally, in the time domain, the first radio resource precedes the second radio resource.

In some embodiments of the present invention, the wireless relay node may further send information of the second wireless resource, so that the downstream node receives the second data packet based on the second wireless resource.

The following describes an embodiment of the communication system in the embodiment of the present invention. Please refer to FIG. 6 . An embodiment of the communication system 600 in the embodiment of the present invention includes:

The wireless relay node 601 in the embodiment shown in FIG. 5 above; and the upstream node 602;

In some embodiments of the present invention, the upstream node includes: a base station; or a wireless relay node as described in any of the foregoing embodiments.

In some embodiments of the present invention, the communication system may further include a downstream node, and the downstream node may include: user equipment.

The following describes an embodiment of the communication system in the embodiment of the present invention. Please refer to FIG. 7 . An embodiment of the communication system 700 in the embodiment of the present invention includes:

The wireless relay node 701 and the downstream node 702 in the embodiment shown in FIG. 5 above;

In some embodiments of the present invention, the downstream node may include: user equipment.

In some embodiments of the present invention, the communication system may further include an upstream node 703, and the upstream node includes: a base station; or a wireless relay node as described in any of the foregoing embodiments.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above may refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

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

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: U disk, removable hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes.

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: The technical solutions described in the embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (13)

1. a kind of forwarding method of data packet, is characterized in that, comprises: The wireless relay node obtains the information of the first wireless resource, and the wireless relay node is a relay user equipment; receiving, by the wireless relay node, a first data packet from an upstream node based on the first wireless resource; The wireless relay node acquires the information of the second wireless resource according to the correspondence between the first wireless resource and the second wireless resource; The correspondence is sent to the wireless relay node by a second network node, and the second network node and the upstream node are the same node, or the second network node and the upstream node are different nodes; The corresponding relationship includes one of a linear relationship, an equal ratio relationship or a modulo relationship between the first resource parameter of the first wireless resource and the second resource parameter of the second wireless resource; The resource type of the first radio resource and the second radio resource is one of a time domain resource, a frequency domain resource, a code domain resource or a space domain resource, and the first radio resource and the second radio resource are different resource types, the first resource parameter and the second resource parameter are respectively the position or size in the resource type; The wireless relay node sends a second data packet based on the second wireless resource, and the second data packet is obtained from the first data packet. 2. The method according to claim 1, wherein the information that the wireless relay node obtains the first wireless resource comprises: receiving, by the wireless relay node, the information of the first wireless resource configured by the first network node; the first network node, the second network node and the upstream node are the same node and are a base station or a relay user equipment; Alternatively, the first network node and the second network node are the same relay user equipment and are different nodes from the upstream node, and the upstream node is a base station or a relay user equipment; Alternatively, the first network node, the second network node, and the upstream node are respectively different nodes, and the first network node and the second network node are respectively one of a base station or a relay user equipment. 3. The method according to claim 1, wherein the information that the wireless relay node obtains the first wireless resource comprises: The wireless relay node selects information of the first wireless resource from a resource pool; wherein the resource pool includes information of one or more wireless resources used to receive the first data packet from an upstream node. 4. The method according to claim 3, characterized in that, The information of the second radio resource belongs to the resource pool; wherein, the resource pool further includes information of one or more radio resources used for sending the first data packet. 5. The method according to any one of claims 1 to 4, wherein the method further comprises: The wireless relay node sends the information of the second wireless resource, so that the downstream node receives the second data packet based on the second wireless resource. 6. A wireless relay node, wherein the wireless relay node is a relay user equipment, comprising: a transceiver, configured to acquire information of the first wireless resource; the transceiver, further configured to receive a first data packet from an upstream node based on the first radio resource; a processor, configured to acquire information of the second wireless resource according to the correspondence between the first wireless resource and the second wireless resource; The correspondence is sent to the wireless relay node by a second network node, and the second network node and the upstream node are the same node, or the second network node and the upstream node are different nodes; The corresponding relationship includes one of a linear relationship, an equal ratio relationship or a modulo relationship between the first resource parameter of the first wireless resource and the second resource parameter of the second wireless resource; The resource type of the first radio resource and the second radio resource is one of a time domain resource, a frequency domain resource, a code domain resource or a space domain resource, and the first radio resource and the second radio resource are different resource types, the first resource parameter and the second resource parameter are respectively the position or size in the resource type; The transceiver is further configured to send a second data packet based on the second wireless resource, where the second data packet is obtained from the first data packet. 7. The wireless relay node according to claim 6, wherein the transceiver is further configured to receive the information of the first wireless resource configured by the first network node; the first network node, the second network node and the upstream node are the same node and are a base station or a relay user equipment; Alternatively, the first network node and the second network node are the same relay user equipment and are different nodes from the upstream node, and the upstream node is a base station or a relay user equipment; Alternatively, the first network node, the second network node, and the upstream node are respectively different nodes, and the first network node and the second network node are respectively one of a base station or a relay user equipment. 8. The wireless relay node according to claim 6, wherein the processor is further configured to select the information of the first wireless resource from a resource pool; wherein the resource pool includes information for selecting the first wireless resource from an upstream The node receives information of one or more radio resources of the first data packet. 9. The wireless relay node according to claim 8, wherein, The information of the second wireless resource belongs to the resource pool; wherein, the resource pool further includes information of one or more wireless resources used for sending the first data packet. 10. The wireless relay node according to any one of claims 6 to 9, wherein the transceiver is further configured to send information of the second wireless resource, so that a downstream node can base on the second wireless resource The resource receives the second data packet. 11. A communication system, characterized in that, comprising: The wireless relay node of any one of claims 6 to 10; and the upstream node and/or the downstream node. 12. The system according to claim 11, wherein the upstream node comprises: a base station; or, The wireless relay node according to any one of claims 6 to 10. 13. The system of claim 12, wherein the downstream node comprises: user equipment.

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