CN107113250B

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

Info

Publication number: CN107113250B
Application number: CN201580001951.3A
Authority: CN
Inventors: 张兴炜; 黎超
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-02-06
Filing date: 2015-02-06
Publication date: 2020-08-07
Anticipated expiration: 2035-02-06
Also published as: CN107113250A; WO2016123791A1

Abstract

The embodiment of the invention discloses a data packet forwarding method, a wireless relay node and a communication system. The method provided by the embodiment of the invention comprises the following steps: the wireless relay node receives a first data packet from an upstream node based on a first wireless resource; the wireless relay node acquires information of a second wireless resource according to the corresponding relation between the first wireless resource and the second wireless resource; the wireless relay node transmits a second data packet based on the second wireless resource, the second data packet being obtained from the first data packet. In the embodiment of the invention, wireless resource scheduling is not required for many times, signaling resource overhead is saved, and efficient data packet forwarding is realized.

Description

Data packet forwarding method, wireless relay node and communication system

Technical Field

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

Background

Third Generation Partnership Project (3rd Generation Partnership Project, 3GPP) Advanced long Term Evolution (L ong Term Evolution-Advanced, L TE-a) Rel-10/11/12/13 version is an enhancement of the long Term Evolution (L ong Term Evolution, &lttttranslation = L "&ttt/t &tttte) Rel-8/9 version, L TE-a system has a higher bandwidth requirement than the L TE system, supports a peak data rate of up to 500M/s uplink of downlink 1G/s, to meet the requirements of L TE-a, L TE-a system takes Carrier Aggregation (CA) technology as its method of expanding the system bandwidth and adopts Multiple antenna enhancement MIMO (Multiple-Input Multiple-Output, Multiple-Input-Output, Multiple-Output) technology and coordinated Multiple Point technology to improve the performance and the performance of the CoMP system.

Although L TE-A adopts various technologies to improve data rate, with the rapid development of wireless communication, the load of wireless communication network is heavier and heavier, how to reduce the load of network becomes a research focus, Device to Device, D2D, which is generated by the Device to Device, becomes the key project of L TE-A Rel-12 version, in the direct connection communication mode of the Device, the terminal and the terminal can directly communicate without being forwarded by the base station, and share the data load of the base station, D2D communication can better utilize the frequency spectrum resource, improve the frequency spectrum utilization rate and the data rate, and simultaneously reduce the load of the base station.

In the L TE-a Rel-13 release, D2D communication needs to study and standardize D2D relaying, i.e. forwarding D2D information through a wireless relay Node (e.g. a relay User Equipment (UE)), for the wireless relay Node, part or all of a data packet (traffic data and/or control information) that needs to be forwarded by an upstream Node (a Node that directly or indirectly provides a data packet for the relay Node, may be a last hop or a multi-hop Node, or may be another wireless relay Node or a source Node) needs to be forwarded to a downstream Node (a Node that directly or indirectly obtains a data packet from the relay Node, may be a next hop or a multi-hop Node, or may be another wireless relay Node or a target Node), wherein the source Node is a network Node that serves as a source to transmit the original data packet, e.g. may be a base station or a UE, and the target Node is a network Node that serves as a sink to accept a data packet, e.g. may be a base station or a UE, and the wireless relay Node is a network Node that participates in data forwarding to a source Node other than the source Node and a target Node, e.g. a UE 356319, a UE, a wireless relay Node, a UE, wherein the source Node, a UE 358, a UE, a.

Currently, in the prior art, the interactive resources of 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 the prior art for the common UE, that is, the uplink resource (for the UE, the transmission resource) is scheduled by the uplink scheduling grant signaling, and the Downlink resource (for the UE, the reception resource) is scheduled by the Downlink scheduling grant signaling, so that two times of scheduling of resources are required, and the signaling overhead is large, if new Downlink Control Information (DCI) is designed, if one control instruction is used to simultaneously schedule the transmission resource and the reception resource, redesign is required, and the resource cannot be scheduled for the UE without network coverage.

Disclosure of Invention

The embodiment of the invention provides a data packet forwarding method, a wireless relay node and a communication system, which are used for realizing efficient data packet forwarding.

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

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

the wireless relay node acquires information of a second wireless resource according to the corresponding relation between the first wireless resource and the second wireless resource;

the wireless relay node transmits a second data packet based on the second wireless resource, the second data packet being 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: the wireless relay node acquires information of the first wireless resource.

With reference to the first implementation manner of the first aspect of the embodiment of the present invention, in a second implementation manner of the first aspect of the embodiment of the present invention, the acquiring, by the radio relay node, the information of the first radio resource includes:

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

With reference to the first implementation manner of the first aspect of the embodiment of the present invention, in a third implementation manner of the first aspect of the embodiment of the present invention, the acquiring, by the radio relay node, the information of the first radio resource includes:

the wireless relay node selects information of the first wireless resource from a resource pool; wherein the resource pool comprises information of one or more radio resources for receiving the first data packet from an upstream node.

With reference to the third implementation manner of the first aspect of the embodiment of the present invention, in a fourth implementation manner of the first aspect of the embodiment of the present invention, the information of the second radio resource belongs to the resource pool; wherein the resource pool further comprises information of one or more radio resources for transmitting the first data packet.

With reference to the first aspect of the embodiment 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 embodiment of the present invention, the corresponding relationship includes:

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

an equal ratio relationship between a first resource parameter of the first radio resource and a second resource parameter of the second radio resource; or,

a modulo relationship of a first resource parameter of the first radio resource to a second resource parameter of the second radio resource.

With reference to the first aspect of the embodiment 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, in a sixth implementation manner of the first aspect of the embodiment of the present invention, the first radio resource at least includes one of a first time domain resource, a first frequency domain resource, a first code domain resource, and a first spatial domain resource; the second radio resource includes at least one of a second time domain resource, a second frequency domain resource, a second code domain resource, and a second spatial domain resource.

With reference to the fifth implementation manner of the first aspect or the sixth implementation manner of the first aspect of the embodiment of the present invention, in a seventh implementation manner of the first aspect of the embodiment of the present invention, the first resource parameter at least includes 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.

With reference to the first aspect of the embodiment 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 an eighth implementation manner of the first aspect of the embodiment of the present invention, the correspondence relationship is sent to the wireless relay node by the second network node.

With reference to the first aspect of the embodiment 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, in a ninth implementation manner of the first aspect of the embodiment of the present invention, the first radio resource is before the second radio resource in a time domain.

With reference to the first aspect of the embodiment 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, or the ninth implementation manner of the first aspect, in a tenth implementation manner of the first aspect of the embodiment of the present invention, the method further includes:

the wireless relay node transmits the information of the second wireless resource so that a downstream node receives the second data packet based on the second wireless resource.

For the downstream node side, the method for forwarding the data packet comprises the following steps:

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

and the downstream node acquires the information of the third wireless resource according to the corresponding relation between the second wireless resource and the third wireless resource, wherein the third wireless resource is used for forwarding a data packet.

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 of a second resource parameter of the second radio resource to a third resource parameter of the third radio resource; or,

an equal ratio relationship of a second resource parameter of the second radio resource to a third resource parameter of the third radio resource; or,

a modulo relationship of a second resource parameter of the second radio resource to a third resource parameter of the third radio resource.

Optionally, the second radio resource at least includes one of a second time domain resource, a second frequency domain resource, a second code domain resource, and a second spatial domain resource; the third wireless resource at least comprises one of a third time domain resource, a third frequency domain resource, a third code domain resource and a third space domain resource. Optionally, the second resource parameter includes at least one of a second location and a second size; the third resource parameter includes at least one of a third location and a third size.

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

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

a transceiver for receiving a first data packet from an upstream node based on a first radio resource;

the processor is used for acquiring the information of the second wireless resource according to the corresponding relation between the first wireless resource and the second wireless resource;

wherein the transceiver is further configured to transmit a second data packet based on the second radio resource, the second data packet being obtained from the first data packet.

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

With reference to the second aspect of the present embodiment, in a second implementation manner of the second aspect of the present embodiment, the processor is further configured to select information of the first radio resource from a resource pool; wherein the resource pool comprises information of 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 embodiment of the present invention, in a third implementation manner of the second aspect of the embodiment of the present invention, the information of the second radio resource belongs to the resource pool; wherein the resource pool further comprises information of one or more radio resources for transmitting the first data packet.

With reference to the second aspect of the embodiment 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 a fourth implementation manner of the second aspect of the embodiment 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, for example, the first resource parameter of the first radio resource and the resource parameter of the second radio resource satisfy formula N₂＝aN₁+ b, wherein, N₂A second resource parameter, N, for the wireless relay node₁A, b are preset parameters as the first resource parameter of the wireless relay nodeOr parameters configured by an upstream node; or,

an equal ratio relationship between the first resource parameter of the first radio resource and the second resource parameter of the second radio resource, for example, the first resource parameter of the first radio resource and the second resource parameter of the second radio resource satisfy formula N₂＝cN₁Wherein N is₂A second resource parameter, N, for the wireless relay node₁C is a preset parameter or a parameter configured by an upstream node; or,

the modulo relationship between the first resource parameter of the first radio resource and the second resource parameter of the second radio resource, for example, 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 formula N₂＝(d N₁)mod N_mWherein N is₂A second resource parameter, N, for the wireless relay node₁A first resource parameter for the wireless relay node, d is a preset parameter or a parameter configured by an upstream node, N_mIs N₂The maximum value of (a) is a preset parameter or a parameter configured by an upstream node; for another example, when there are a plurality of 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 following formula: n is a radical of₂＝(pN₁₁+q N₁₂)mod N_mWherein N is₂A second resource parameter, N, for the wireless relay node₁₁、N₁₂For the first resource parameter of the wireless relay node, p and q are preset parameters or parameters configured by an upstream node, N_mIs N₂The maximum value of (a) is a preset parameter or a parameter configured by an upstream node.

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

with reference to the third implementation manner of the second aspect or the fourth implementation manner of the second aspect of the present embodiment, in a fifth implementation manner of the second aspect of the present embodiment, the first radio resource at least includes one of a first time domain resource, a first frequency domain resource, a first code domain resource, and a first spatial domain resource; the second radio resource includes at least one of a second time domain resource, a second frequency domain resource, a second code domain resource, and a second spatial domain resource.

With reference to the second aspect of the embodiment 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, in a sixth implementation manner of the second aspect of the embodiment of the present invention, the first resource parameter at least includes 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.

With reference to the second aspect of the embodiment 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, in a seventh implementation manner of the second aspect of the embodiment of the present invention, the correspondence relationship is sent to the wireless relay node by the second network node.

With reference to the second aspect of the embodiment 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, in an eighth implementation manner of the second aspect of the embodiment of the present invention, in a time domain, the first radio resource is before the second radio resource.

With reference to the second aspect of the embodiment 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, in a ninth implementation manner of the second aspect of the embodiment of the present invention, the transceiver is further configured to transmit information of the second radio resource, so that the downstream node receives the second data packet based on the second radio resource.

A third aspect of an embodiment 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 embodiment of the present invention, in a first implementation manner of the first aspect of the embodiment of the present invention, the upstream node includes: a base station; or,

the wireless relay node of the second aspect.

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

a user equipment.

According to the technical scheme, the embodiment of the invention has the following advantages:

after the wireless relay node receives the first data packet from the upstream node based on the first wireless resource, the second wireless resource of the wireless relay node can be obtained according to the corresponding relation between the first wireless resource and the second wireless resource, and the second data packet is sent based on the second wireless resource.

Drawings

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

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

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

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

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

FIG. 6 is a schematic diagram of an embodiment of a communication system in accordance with an embodiment of the present invention;

fig. 7 is a schematic diagram of another embodiment of a communication system according to an embodiment of the invention.

Detailed Description

The embodiment of the invention provides a data packet forwarding method, a wireless relay node and a communication system, which save signaling resource overhead and realize efficient data packet forwarding.

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

The terms "first," "second," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

To facilitate an understanding of the embodiments of the present invention, a few elements that will be introduced in the description of the embodiments of the present invention are first introduced herein;

D2D scenario:

the D2D scenario can be divided into 3 scenarios including network coverage, partial network coverage and no network coverage, from the perspective of the D2D communication link, the D2D device is in the coverage of the base station in the scenario of network coverage, a part of the D2D device is in the coverage of the base station in the partial network coverage scenario, the other part of the D2D device is not in the coverage of the base station, and all the D2D devices are not in the coverage of the base station in the scenario of no network coverage. From a certain D2D UE perspective, if the UE can hear the base station's signal, it is an in-network coverage UE; if the UE can hear the signals of the UE in the network coverage, the UE is partially covered by the network; and if the first two signals can not be received by the UE, the UE is the UE out of the network coverage.

Resource pool:

in the network coverage scenario, the resource pool is a whole block of wireless resources separated by the base station or the upstream node, and in the network coverage scenario, the resource pool is that the D2D device can obtain a predefined system bandwidth.

In the embodiment of the present invention, the position of the radio resource is the position of the radio resource, and when the radio resource is a time domain resource, the position of the radio resource is the position of a subframe/slot/symbol of the time domain, for example, the several subframes/slots/symbols of the time domain; when the radio resource is a frequency domain resource, the position of the radio resource is the position of a frequency domain subcarrier, for example, the second subcarrier of the frequency domain; when the radio resource is an airspace resource, the position of the radio resource is the position of an antenna port of the airspace, for example, the number-th antenna port of the airspace; when the radio resource is a code domain resource, the location of the radio resource is the location of a code domain code, such as the number one of the code domain codes.

The size of the radio resource refers to the amount of the resource occupied by the radio resource, and when the radio resource is a time domain resource, the size of the radio resource occupies the amount of subframes/time slots/symbols occupied by the time domain, for example, the time domain occupies several subframes/time slots/symbols; when the radio resource is a frequency domain resource, the size of the radio resource is the amount of the frequency domain occupied by the subcarriers, for example, the frequency domain occupies several subcarriers; when the wireless resource is an airspace resource, the size of the wireless resource is the amount of the antenna port occupied by the airspace, for example, the airspace occupies a plurality of antenna ports; when the radio resource is a code domain resource, the size of the radio resource is the amount of codes occupied by the code domain, for example, the code domain occupies several codes. For example, the position of a certain radio resource is 2 subframes starting from the 5 th subframe (size), that is, the radio resource actually occupies the 5 th and 6 th subframes.

An embodiment of the forwarding method of a data packet of the present invention, wherein a forwarding method of a data packet may include: the wireless relay node receives a first data packet from an upstream node based on a first wireless resource; the wireless relay node acquires information of a second wireless resource according to the corresponding relation between the first wireless resource and the second wireless resource; the wireless relay node transmits a second data packet based on the second wireless resource, the second data packet being obtained from the first data packet.

Referring to fig. 2, fig. 2 is a flowchart illustrating a method for forwarding a data packet according to an embodiment of the present invention. As shown in fig. 2, a method for forwarding a data packet according to an embodiment of the present invention may include the following steps:

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

the D2D communication is divided into communication forms such as broadcast, multicast and unicast, an upstream node can send data packets outwards through the communication forms such as broadcast, multicast and unicast, and the wireless relay node needs to know at least a first wireless resource for receiving the upstream node and a second wireless resource for forwarding to a downstream node to finish forwarding the data packets to the downstream node.

In this embodiment, after acquiring the first radio resource, or traversing all possible first radio resources, the wireless relay node receives the first data packet from the upstream node based on the first radio resource, where the first radio resource is used to receive data to be forwarded.

In this embodiment, the information that the wireless relay node acquires the first wireless resource may be: the wireless relay node receiving information of the first wireless resource configured by the first network node; or, the wireless relay node selects the information of the first wireless resource from a resource pool; wherein the resource pool includes information of one or more radio resources for receiving the first packet from the upstream node, which is not limited herein.

The wireless relay node refers to a network node, such as relay user equipment (relay UE), that participates in data forwarding except for a source node (serving as a network node where a source sends an original data packet) and a destination node (serving as a network node where a sink receives a data packet), and the like, which is not limited herein.

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

in some embodiments of the present invention, the correspondence relationship between the first radio resource and the second radio resource may exist in the form of an array, a table, a functional relationship, or the like, and in general, to avoid collision, the second radio resource corresponding to the first radio resource should be unique.

In some embodiments of the present invention, the corresponding relationship between the first wireless resource and the second wireless resource may be sent to the wireless relay node by the second network node, or, of course, the wireless relay node may also be preset locally, or a part of parameters (for example, the below-mentioned configurable parameters) in the corresponding relationship between the first wireless resource and the second wireless resource may be sent to the wireless relay node by the second network node, which is not limited herein. In this embodiment, the first network node and the second network node may be the same node, or both may be the upstream node described in step 302, or the first network node and the second network node may be different nodes, for example, one is a base station, and the other is a relay UE, which is not limited herein.

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

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

After obtaining 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 is the same as the first data packet, that is, the first data packet is forwarded without any change; the second packet may also be obtained from the first packet (which may also be understood as being obtained from the first packet), for example, the second packet is obtained by adding some information (for example, information such as hop count, self node ID, and the like) on the basis of the first packet, and for example, the second packet may also be a part of the first packet after being divided into a plurality of blocks, or the second packet is synthesized by a plurality of packets including the first packet, which is not limited herein, wherein the second packet may be forwarded in the form of broadcast, multicast, unicast, and the like.

In the embodiment shown in fig. 2, the method may further include: referring to fig. 3, a wireless relay node receives information of the first radio resource configured by a first network node, and another embodiment of a method for forwarding a data packet according to an embodiment of the present invention may include the following:

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

in this embodiment, the information that the wireless relay node acquires the first wireless resource may be: the wireless relay node receiving information of the first wireless resource configured by the first network node; the first network node is configured to signal a first radio resource for the wireless relay node to receive data and/or control information, may be transmitted on a specific relay channel, which is the wireless relay node dedicated relay channel or all wireless relay node common relay channels, or the first network node is configured to signal a first radio resource for the wireless relay node to receive control information, may be transmitted on a specific relay channel, which is the wireless relay node dedicated relay channel or all wireless relay node common relay channels, and the first network node is configured to signal to the wireless relay node a first radio resource for receiving data information, and transmitting the control information on a first radio resource configured by the first network node to the wireless relay node for receiving the control information, which is not limited herein.

The information that the wireless relay node acquires the first wireless resource may also be: 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 radio resources for receiving the first packet from the upstream node, which is not limited herein.

In this embodiment, the upstream node that sends the information of the one or more radio resources of the first packet may be the same as or different from the upstream node that sends the first packet in step 302, and is not limited herein.

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 radio resource, without the step of acquiring the first radio resource, and thus is not limited herein.

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

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

The wireless Relay node refers to a network node participating in data forwarding except for a source node (serving as a network node where a source sends an original data packet), a destination node (serving as a network node where a sink receives a data packet), such as a Relay user equipment (Relay UE), and the like, and is not limited herein.

303. The wireless relay node acquires the information of the second wireless resource according to the corresponding relation 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 spatial domain resource; the second radio resources may include at least one of second time domain resources, second frequency domain resources, second code domain resources, and second spatial domain resources.

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

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 table lookup of the first radio resource, the first radio resource may uniquely obtain one second radio resource according to the table lookup, and different first radio resources generally do not suggest to point to the same second radio resource at the same time to avoid collision. Of course, one first radio resource may also obtain two or more second radio resources according to the table lookup, and which transmission among the two or more transmission resources is determined by the Relay UE, which is not limited herein.

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

a linear relationship of a first resource parameter of the first radio resource to a second resource parameter of the second radio resource; or, an equal ratio relationship between a first resource parameter of the first radio resource and a second resource parameter of the second radio resource; or, a modulo relation of a first resource parameter of the first radio resource and a second resource parameter of the second radio resource.

The specific 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 radio resource and the resource parameter of the second radio resource satisfy formula N₂＝aN₁+ b, wherein, N₂A second resource parameter, N, for the wireless relay node₁A, b are preset parameters or parameters configured by an upstream node;

for example, when the first radio resource is one of a first time domain resource, a first frequency domain resource, a first code domain resource and a first spatial domain resourceWhen the first resource parameter is the first Size, the second resource parameter of the second wireless resource is obtained according to the linear relationship, specifically, 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, for example, Size2 ═ as Size1+ b, and for example, the first resource parameter and the second resource parameter may also be the first position and the second position, respectively, for example, when the first wireless resource and the second wireless resource are both time domain resources, N is a time domain resource_t2＝aN_t1+ b, when the first radio resource and the second radio resource are both frequency domain resources, N_f2＝aN_f1+ b; of course, the second resource parameter obtained according to the linear relationship may also be obtained according to the linear relationship when the first resource parameter is the first size, and the second resource parameter is the first position;

it is to 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 a first time domain resource, the second radio resource may also be one or more of a second frequency domain resource, a second spatial domain resource, and a second code domain resource, where the first resource parameter is a first size or a first position, and the second resource parameter may also be a second size and a second position, such as N_t2＝aN_f1+ b, or N_f2＝aN_t1+ b, which is not limiting herein. 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 space domain resource, and the second resource parameter corresponding to the first resource parameter is obtained according to the linear relationship, the first resource parameter is similar to the first resource parameter, and details are not repeated here.

The specific geometric 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 radio resource and the second resource parameter of the second radio resource satisfy formula N₂＝cN₁Wherein N is₂In the wirelessSecond resource parameter, N, of the relay node₁C is a preset parameter or a parameter configured by an upstream node, wherein the parameter c can be a fraction or an integer;

for example, when the first radio resource is a first position or a 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 second resource parameter corresponding to the first resource parameter is obtained according to the equivalence relation, specifically, when the first resource parameter is the first Size, the second resource parameter is obtained according to the linear relation, the second resource parameter is a second Size, for example, Size2 ═ cs 1, of course, when the first resource parameter is the first position, the second resource parameter corresponding to the first resource parameter is obtained according to the equivalence relation, the second resource parameter is the second position, for example, when the first radio resource and the second radio resource are both time domain resources, N is a maximum value_t2＝cN_t1When the first radio resource and the second radio resource are both frequency domain resources, N_f2＝cN_f1；

It is to 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 a first time domain resource, the second radio resource may also be one or more of a second frequency domain resource, a second spatial domain resource, and a second code domain resource, where the first resource parameter is a first size or a first position, and the second resource parameter may also be a second size and a second position, specifically, such as N_f2＝cN_t1Or N_t2＝cN_f1In this way, 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 space domain resource, and the second resource parameter corresponding to the first resource parameter is obtained according to the equivalence relation, the same as when the first radio resource is the first time domain resource, and the description is omitted 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 formula N₂＝(d N₁)mod N_mWherein N is₂A second resource parameter, N, for the wireless relay node₁A first resource parameter for the wireless relay node, d is a preset parameter or a parameter configured by an upstream node, N_mIs N₂The maximum value of (a) 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, if the first radio resource is a first time domain resource and the second radio resource is a second time domain resource, the above formula is N_t2＝(d N_t1)mod N_mFor another example, when the first radio resource is a first frequency domain resource and the second radio resource is a second frequency domain resource, the above formula is N_f2＝(d N_f1)mod N_mIn this case, the first resource parameter may be a first size or a first position, and the second resource parameter may be a second size or a second position, which is not particularly limited.

It is to be understood that the first radio resource may also be a different type of resource from the second radio resource, for example, when the first radio resource is a first time domain resource, the second radio resource may also be one or more of a second frequency domain resource, a second spatial domain resource, and a second code domain resource, specifically, N_t2＝(d N_f1)mod N_mOr N_f2＝(d N_t1)mod N_mIn this case, the first resource parameter may also be a first size or a first position, and the second resource parameter may be a second size or a second position, which is not limited herein.

(2) When there are a plurality of 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 following formula:

N₂＝(pN₁₁+q N₁₂)mod N_m；

wherein N is₂A second resource parameter, N, for the wireless relay node₁₁、N₁₂For the first resource parameter of the wireless relay node, p and q are preset parameters or parameters configured by an upstream node, N_mIs N₂The maximum value of (a) 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 first positions or first sizes of two of the first time domain resource, the first frequency domain resource, the first code domain resource, and the first spatial domain resource, the second resource parameter is obtained according to the modulo relationship, specifically, 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, and the second resource parameter may be a second size of the second time domain resource or a second size of the second frequency domain resource, for example, there are several modulo modes as follows:

(1) when the first wireless resource comprises a first time domain resource and a first frequency domain resource, obtaining a second resource parameter (a second size or a second position) of a second time domain resource according to a first resource parameter (a first size or a first position) of the first time domain resource and a first resource parameter (a first size or a first position) of the first frequency domain resource: n is a radical of_t2＝(pN_t1+q N_f1)mod N_m；

(2) When the first wireless resource comprises a first time domain resource and a first frequency domain resource, obtaining a second resource parameter (a second size or a second position) of a second frequency domain resource according to a first resource parameter (a first size or a first position) of the first time domain resource and a first resource parameter (a first size or a first position) of the first frequency domain resource: n is a radical of_f2＝(pN_t1+q N_f1)mod N_m；

In this way, when 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 resource parameters may 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, or may be the first size of the resource at the same time, such as the first size of the first frequency domain resource and the first size of the first time domain resource, or may be the first position of the resource, or may be the first size of the resource, such as the first position of the first frequency domain resource and the first size of the first time domain resource, and the like), and the second resource parameter is obtained according to the modulo relationship, the obtained second resource parameter may at least include the size or the position of one of the second time domain resource, the second frequency domain spatial domain resource, the second code domain resource and the second resource, without limitation thereto;

in the foregoing implementation manner, according to an example that the first resource parameter of the first radio resource includes one or two of a first time domain resource (first size or first location), a first frequency domain resource (first size or first location), a first code domain resource (first size or first location), and a first spatial domain resource (first size or first location), the second resource parameter of the second radio resource is obtained, and the second resource parameter of the second radio resource is one or two of a second time domain resource (second size or second location), a second frequency domain resource (second size or second location), a second code domain resource (second size or second location), and a second spatial domain resource (second size or second location), it is understood that the first resource parameter may further include that the first resource parameter includes one or two of the first time domain resource (first size or first location), the second time domain resource (second size or second location), and the first spatial domain resource (second size or second location) The first resource parameter of the second radio resource is obtained from more parameters of the first frequency domain resource (the first size or the first position), the first code domain resource (the first size or the first position), and the first spatial domain resource (the first size or the first position), which is not limited herein.

When the first resource parameter is the first size and the second resource parameter is the second size, the multiple corresponding relationships at least cover the following scenarios:

the first size is equal to the second size, namely the wireless relay node directly forwards the upstream data packet without changing the source;

the first size is slightly larger than the second size, that is, the wireless relay node adds some information to the upstream data packet and forwards the information, wherein the additional information may include hop count, own node ID, other information of own node, and the like;

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

In some embodiments of the present invention, the correspondence relationship between the first radio resource and the second radio resource in the wireless relay node may have a plurality of correspondence relationships, such as a plurality of arrays, tables, functional relations, and the like, where the functional relations may also include one or more; when there are a plurality of correspondences between the first radio resource and the second radio resource in the wireless relay node, there may be a number (e.g., 0, 1, 2, 3, etc.) or a priority for each of the correspondences, and a usage scenario or a usage priority for the plurality of correspondences is defined.

In some embodiments of the present invention, when the first resource parameter of the first radio resource is linearly related to the first resource parameter of the second radio resource; or, an equal ratio relationship between a first resource parameter of the first radio resource and a second resource parameter of the second radio resource; alternatively, when the first resource parameter of the first radio resource is modulo related to the second resource parameter of the second radio resource, the corresponding relationship may be fixed in a protocol, but the parameters in the corresponding relationship, such as a, b, c, d, p, and q, may be set as follows:

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

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

in some embodiments of the present invention, when the wireless relay node acquires the information of the first wireless resource, the information of the first wireless resource is: when the wireless relay node selects the information of the first wireless resource from a resource pool, the information of the second wireless resource can also be selected from the resource pool, namely the information of the second wireless resource belongs to the resource pool; wherein the resource pool further comprises information of one or more radio resources for transmitting the first data packet. It is to be understood that, in practical applications, the resource pool may also be configured as two resource pools with different attributes, one for selecting information of the first radio resource and the other for selecting information of the second radio resource, which are not shared therebetween, and are not limited herein.

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

304. The wireless relay node transmits 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 is the same as the first data packet, that is, the first data packet is forwarded without any change, the second data packet may also be obtained from the first data packet, for example, the second data packet is obtained by adding some information (for example, information such as hop count and self node ID) on the basis of the first data packet, for example, the second data packet may also be a part of the first data packet after being divided into multiple blocks, or the second data packet is synthesized by multiple data packets including the first data packet, which is not limited herein, and the second data packet may be forwarded in a broadcast, multicast, unicast or other form.

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

The downstream node side is connected with the downstream node, and the data packet forwarding method comprises the following steps:

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

Optionally, the downstream node sends a third packet based on the third radio resource, where the third packet is obtained from the second packet, for example, the third packet is the same as the second packet, that is, the second packet is forwarded without being changed, the third packet may be added with some information (for example, information such as hop count and self node ID) based on the second packet, the third packet may be a part of the second packet after being divided into multiple pieces, or the third packet is synthesized by multiple packets including the second packet, which is not limited herein.

Optionally, the downstream node sends the information of the third radio resource, so that a further downstream node receives the third data packet based on the third radio 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, and the obtaining process is the same as that of the wireless relay node (except for different objects), which is not described herein again.

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

401. the UE2 receives information of reception resources configured by the UE 1;

in this embodiment, the first radio resource is a receiving resource, that is, a radio resource for receiving data to be forwarded; the wireless relay node is a UE, and the upstream node is another UE, it is understood that in other embodiments of the present invention, 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 a base station, and the like, which is not limited herein.

The information that the UE2 acquires the receiving resource may be: the UE2 receiving information of the reception resources configured by UE 1; the signaling of the data receiving resource configured by the UE1 to the UE2 may be sent on a specific relay channel, which is a dedicated relay channel for the UE2 or a common relay channel for all wireless relay nodes, or may be sent on a control channel of the data receiving resource configured by the UE1 to the UE2, which is not limited herein.

The UE2 may acquire the information of the receiving resource by: the UE2 selecting information of the reception resource from a resource pool; wherein the resource pool includes information of one or more radio resources for receiving the first data packet from the UE1, which is not limited herein.

In this embodiment, the UE1 sending the information of one or more radio resources of the first packet may be the same as or different from the upstream node sending the first packet in step 402, and the upstream node sending the first packet in step 402 is also the UE1, which is not limited herein.

In some embodiments of the present invention, the UE2 may receive the data packet from the upstream node UE1 based on the existing receiving resources, and does not require the step of obtaining the receiving resources from the UE1, and is not limited herein.

402. The UE2 receives a first data packet from the UE1 based on the reception resources;

D2D communication is divided into communication forms such as broadcast, multicast and unicast, UE1 can send data packets to outside through communication forms such as broadcast, multicast and unicast, and UE2 needs to know at least the receiving resource of receiving UE1 and the transmitting resource to UE3 for forwarding data packets to downstream nodes (e.g., UE3), i.e., for transmitting control information and/or data received from upstream nodes.

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

403. The UE2 acquires the information of the sending resource according to the corresponding relation between the receiving resource and the sending resource;

in this embodiment, the second radio resource is a transmission resource, which is used for transmitting 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 first time domain resources, first frequency domain resources, first code domain resources, and first spatial domain resources; the transmission resources may include at least one of second time domain resources, second frequency domain resources, second code domain resources, and second spatial 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 transmission resource may include at least one of a second location and a second size.

In some embodiments of the present invention, the corresponding relationship between the receiving resource and the transmitting resource may be sent to the UE2 by a base station, a core network, or an upstream node, or of course, the UE2 may be preset locally, or part of parameters (for example, the below-described configurable parameters) in the corresponding relationship between the receiving resource and the transmitting resource may be sent to the wireless relay node by the upstream node, which is not limited herein.

In some embodiments of the present invention, the corresponding relationship between the receiving resource and the transmitting resource may exist in an array, a table, a functional relationship, or the like, and in general, to avoid collision, the transmitting resource corresponding to the receiving resource should be unique.

The corresponding relationship between the receiving resource and the sending resource may be a table relationship, that is, the sending resource is obtained by looking up the table of the receiving resource, one receiving resource can obtain only one sending resource according to the table look-up, and different receiving resources generally do not suggest to point to the same sending resource at the same time to avoid collision. Of course, one receiving resource may obtain two or more transmitting resources according to the table lookup, and which transmission among the two or more transmitting resources is determined by the Relay UE.

a linear relationship of a first resource parameter of the receiving resource to a second resource parameter of the transmitting resource; or, an equal ratio relation between a first resource parameter of the receiving resource and a second resource parameter of the sending resource; or, a modulo relation between a first resource parameter of the reception resource and a second resource parameter of the transmission resource.

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

the first resource parameter of the receiving resource and the resource parameter of the sending resource satisfy the formula N₂＝aN₁+ b, wherein, N₂Is a second resource parameter, N, of the UE2₁A first resource parameter of the UE2, a and b being preset parameters;

for example, when the receiving resource is the first time domain resource, the first frequency domain resource, the first code domain resourceWhen the first position or the first Size of one of the source and the first airspace resource is reached, a second resource parameter of the sending resource corresponding to the first resource parameter of the receiving resource is obtained according to the linear relationship, specifically, when the first resource parameter is the first Size, the second resource parameter of the sending resource is obtained according to the linear relationship, the second resource parameter is the second Size, for example, Size2 ═ as 1+ b, and the first resource parameter and the second resource parameter may also be the first position and the second position respectively, for example, when the receiving resource and the sending resource are time domain resources, N and the sending resource are time domain resources, respectively_t2＝aN_t1+ b, when both the receiving resource and the transmitting resource are frequency domain resources, N_f2＝aN_f1+ b; of course, the second resource parameter obtained according to the linear relationship may also be obtained according to the linear relationship when the first resource parameter is the first size, and the second resource parameter is the first position;

it is to be understood that the receiving resource may also be a resource of a different type from the transmitting resource, for example, when the receiving resource is a first time domain resource, the transmitting resource may also be one or more of a second frequency domain resource, a second space domain resource, and a second code domain resource, where the first resource parameter is a first size or a first position, and the second resource parameter may also be a second size and a second position, specifically, N_t2＝aN_f1+ b, or N_f2＝aN_t1+ b, which is not limiting herein. 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 space domain resource, and the second resource parameter corresponding to the first resource parameter is obtained according to the linear relationship, the method is similar to that when the receiving resource is the first time domain resource, and details are not repeated here.

The specific geometric 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 transmitting resource satisfy the formula N₂＝cN₁Wherein N is₂Is a second resource parameter, N, of the UE2₁Is a first resource of the UE2C is a preset parameter or a parameter configured by an upstream node, wherein the parameter c can be a fraction or an integer;

for example, when the receiving resource is a first position or a first Size of one of a first time domain resource, a first frequency domain resource, a first code domain resource and a first space domain resource, a second resource parameter corresponding to the first resource parameter is obtained according to the equal ratio relationship, specifically, when the first resource parameter is the first Size, a second resource parameter is obtained according to the linear relationship, the second resource parameter is a second Size, for example, Size2 ═ cSize1, of course, when the first resource parameter is the first position, a second resource parameter corresponding to the first resource parameter is obtained according to the equal ratio relationship, the second resource parameter is a second position, for example, when the receiving resource and the transmitting resource are both resources, N_t2＝cN_t1When the receiving resource and the transmitting resource are both frequency domain resources, N_f2＝cN_f1(ii) a It is to be understood that the receiving resource may also be a resource of a different type from the transmitting resource, for example, when the receiving resource is a first time domain resource, the transmitting resource may also be one or more of a second frequency domain resource, a second space domain resource, and a second code domain resource, where the first resource parameter is a first size or a first position, and the second resource parameter may also be a second size and a second position, specifically, such as N_f2＝cN_t1Or N_t2＝cN_f1In this way, 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 space domain resource, and the second resource parameter corresponding to the first resource parameter is obtained according to the equivalence relation, the method is similar to that when the receiving resource is the first time domain resource, and is not described herein again;

the specific form of the modulo relationship between the first resource parameter of the receiving resource and the second resource parameter of the transmitting 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 resourceThe source parameter may be satisfying formula N₂＝(d N₁)mod N_mWherein N is₂Is a second resource parameter, N, of the UE2₁A first resource parameter for the UE2, d is a predetermined parameter or a parameter configured by an upstream node, N_mIs N₂The maximum value of (a) is a preset parameter or a parameter configured by an upstream node; the receiving resource may also be a resource of the same type as the transmitting resource, for example, if the receiving resource is a first time domain resource and the transmitting resource is a second time domain resource, the above formula is N_t2＝(dN_t1)mod N_mFor another example, when the receiving resource is a first frequency domain resource and the transmitting resource is a second frequency domain resource, the above formula is N_f2＝(d N_f1)mod N_mIn this case, the first resource parameter may be a first size or a first position, and the second resource parameter may be a second size or a second position, which is not particularly limited.

It is to be understood that the receiving resource may also be a resource of a different type from the transmitting resource, for example, when the receiving resource is a first time domain resource, the transmitting resource may also be one or more of a second frequency domain resource, a second space domain resource, and a second code domain resource, specifically, such as N_t2＝(d N_f1)mod N_mOr N_f2＝(d N_t1)mod N_mIn this case, the first resource parameter may also be a first size or a first position, and the second resource parameter may be a second size or a second position, which is not limited herein.

(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 transmitting resource may satisfy the formula:

N₂＝(pN₁₁+q N₁₂)mod N_m；

wherein N is₂Is a second resource parameter, N, of the UE2₁₁、N₁₂For the first resource parameter of the UE2, p and q are preset parameters or parameters configured by an upstream node, N_mIs N₂The maximum value of (a) is a preset parameter or a parameter configured by an upstream node.

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

(1) when the receiving resources comprise first time domain resources and first frequency domain resources, obtaining a second size of second time domain resources according to the first size of the first time domain resources and the first size of the first frequency domain resources: n is a radical of_t2＝(pN_t1+q N_f1)mod N_m；

(2) When the receiving resources include first time domain resources and first frequency domain resources, obtaining a second size of second frequency domain resources according to the first size of the first time domain resources and the first size of the first frequency domain resources: n is a radical of_f2＝(pN_t1+q N_f1)mod N_m；

in the foregoing implementation manner, according to an example that the first resource parameter of the receiving resource includes one or two of 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 (a first size or a first position), and a first spatial domain resource (a first size or a first position), the second resource parameter of the transmitting resource is obtained, and the second resource parameter of the transmitting resource is one or two of a second time domain resource (a second size or a second position), a second frequency domain resource (a second size or a second position), a second code domain resource (a second size or a second position), and a second spatial domain resource (a second size or a second position) The more parameters in the first code domain resource (first size or first position) and the first space domain resource (first size or first position) obtain at least one of the second resource parameters of the transmission resource, which is not limited herein.

the first size is equal to the received second size, i.e., the UE2 forwards the upstream packet directly intact.

The first size is slightly larger than the second size, that is, the UE2 forwards the packet after appending some information on the basis of the upstream packet, where the appended information may include the hop count, the self node ID, other information of the self node, and the like.

The first size is a fraction or multiple of the second size, i.e., the UE2 divides upstream packets into multiple blocks for transmission, or combines upstream packets into one packet for transmission.

In some embodiments of the present invention, the correspondence relationship between the receiving resource and the sending resource in the UE2 may have a plurality of correspondence relationships, such as a plurality of arrays, tables, functional relations, and the like, where a functional relation may also include one or more; when there are a plurality of correspondences between the receiving resource and the transmitting resource in the UE2, there may be a number (e.g., 0, 1, 2, 3.. or the like) or a priority for each of the correspondences, and a usage scenario or a usage priority for the plurality of correspondences is defined, for example, the UE2 uses the above-mentioned geometric correspondence relation in the case of network coverage, and uses the table correspondence for searching in the case of no network coverage, which is not limited herein.

In some embodiments of the present invention, when the first resource parameter of the receiving resource is linearly related to the first resource parameter of the transmitting resource; or, an equal ratio relation between a first resource parameter of the receiving resource and a second resource parameter of the sending resource; alternatively, when the first resource parameter of the receiving resource is modulo related to the second resource parameter of the transmitting resource, the corresponding relationship may be fixed in the protocol, but the parameters in the corresponding relationship, such as a, b, c, d, p, and q, may be set as follows:

(3) configurable for UEs within network coverage;

(4) a fixed value can be set for a UE outside the network coverage;

in some embodiments of the invention, when the UE2 obtains the information of the receiving resource, it is: when the UE2 selects the information of the receiving resource from a resource pool, the information of the sending resource may also be selected from the resource pool, that is, the information of the sending resource belongs to the resource pool; wherein the resource pool further comprises information of one or more radio resources for transmitting the first data packet. It is to be understood that, in practical applications, the resource pool may also be configured as two resource pools with different attributes, one for selecting information of the receiving resource, such as the receiving resource pool, and the other for selecting information of the transmitting resource, such as the transmitting resource pool, which are not shared therebetween, and are not limited herein.

In some embodiments of the invention, the reception resources precede the transmission resources in the time domain.

404. The UE2 transmits the second packet based on the transmission resource.

In this embodiment, the second packet is obtained from the first packet; after obtaining the information about the transmission resource, the UE2 may forward a second packet based on the transmission resource, where the second packet is obtained from the first packet, for example, the second packet is the same as the first packet, i.e., the first packet is forwarded without being changed, the second packet may also be obtained from the first packet, for example, the second packet is obtained by adding some information (for example, information such as hop count and self node ID) to the first packet, for example, the second packet may also be a part of the first packet after being divided into multiple blocks, or the second packet is composed of multiple packets including the first packet, and the forwarding form may be broadcast, multicast, unicast, and the like, but is not limited herein.

In some embodiments of the present invention, the UE2 may also transmit information of the transmission resources to enable a downstream node (e.g., UE3) to receive the second data packet based on the transmission resources.

Referring to fig. 5, an embodiment of a wireless relay node 500 in the embodiment of the present invention is described below, where the embodiment of the wireless relay node in the embodiment of the present invention includes:

a transceiver 501 for receiving a first data packet from an upstream node based on a first radio resource;

a processor 502, configured to obtain information of a second radio resource according to a corresponding relationship between the first radio resource and the second radio resource;

wherein the transceiver 501 is further configured to transmit a second data packet based on the second radio resource, the second data packet being obtained from the first data packet.

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 second wireless resource of the wireless relay node according to the corresponding relationship between the first wireless resource and the second wireless resource, and the transceiver 501 sends the second data packet based on the second wireless resource.

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

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

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

Optionally, the correspondence relationship may include:

Optionally, the first radio resource at least includes one of a first time domain resource, a first frequency domain resource, a first code domain resource, and a first spatial domain resource; the second radio resource includes at least one of a second time domain resource, a second frequency domain resource, a second code domain resource, and a second spatial domain resource.

Optionally, 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.

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

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

Referring to fig. 6, an embodiment of a communication system 600 according to an embodiment of the present invention includes:

the wireless relay node 601 in the embodiment shown in fig. 5 described above; and the upstream node 602;

in some embodiments of the invention, the upstream node comprises: a base station; or a wireless relay node as described in any of the embodiments above.

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

Referring to fig. 7, an embodiment of a communication system 700 according to an embodiment of the present invention includes:

the wireless relay node 701 and the downstream node 702 in the embodiment shown in fig. 5 described above;

in some embodiments of the invention, the downstream node may comprise: a user equipment.

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

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A method for forwarding a packet, comprising:

a wireless relay node acquires information of a first wireless resource, wherein the wireless relay node is relay user equipment;

the wireless relay node receiving 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 corresponding relation of the first wireless resource and the second wireless resource;

the corresponding relation is sent to the wireless relay node by a second network node, 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 relation comprises one of a linear relation, an equal ratio relation or a modular relation of a first resource parameter of the first wireless resource and a second resource parameter of the second wireless resource;

the resource type of the first wireless resource and the second wireless resource is one of a time domain resource, a frequency domain resource, a code domain resource or a space domain resource, the first wireless resource and the second wireless resource are different resource types, and the first resource parameter and the second resource parameter are respectively the position or the size in the resource types;

and the wireless relay node transmits a second data packet based on the second wireless resource, wherein the second data packet is obtained according to the first data packet.

2. The method of claim 1, wherein the wireless relay node obtaining the information of the first radio resource comprises:

the wireless relay node receives information of the first wireless resource configured by a 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;

or 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 relay user equipment;

or the first network node, the second network node, and the upstream node are different nodes, and the first network node and the second network node are one of a base station or a relay user equipment.

3. The method of claim 1, wherein the wireless relay node obtaining the information of the first radio resource comprises:

4. The method of claim 3,

the information of the second radio resource belongs to the resource pool; wherein the resource pool further comprises information of one or more radio resources for transmitting the first data packet.

5. The method according to any one of claims 1 to 4, further comprising:

6. A wireless relay node, wherein the wireless relay node is a relay user equipment, comprising:

a transceiver for acquiring information of a first radio resource;

the transceiver further configured to receive a first data packet from an upstream node based on the first radio resource;

7. The wireless relay node of claim 6, wherein the transceiver is further configured to receive information of the first radio resource configured by a first network node;

8. The wireless relay node of claim 6, wherein the processor is further configured to select the information for the first wireless resource from a resource pool; wherein the resource pool comprises information of one or more radio resources for receiving the first data packet from an upstream node.

9. The wireless relay node of claim 8,

10. The wireless relay node according to any of claims 6 to 9, wherein the transceiver is further configured to transmit information of the second radio resource, so that a downstream node receives the second data packet based on the second radio resource.

11. A communication system, comprising:

the wireless relay node of any of claims 6 to 10; and

the upstream node and/or the downstream node.

12. The system of claim 11, wherein the upstream node comprises: a base station; or,

the wireless relay node of any of claims 6 to 10.

13. The system of claim 12, wherein the downstream node comprises:

a user equipment.