CN110087340B

CN110087340B - Relay transmission method and device

Info

Publication number: CN110087340B
Application number: CN201810074927.8A
Authority: CN
Inventors: 周淼; 苏迪; 孙霏菲; 张英杰; 钱辰
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2018-01-25
Filing date: 2018-01-25
Publication date: 2024-04-05
Anticipated expiration: 2038-01-25
Also published as: CN110087340A

Abstract

The embodiment of the invention provides a relay transmission method, which is applied to the technical field of communication and comprises the following steps: the first UE receives configuration information sent by the base station, receives information of the second UE according to the configuration information, and forwards the received information of the second UE, wherein the configuration information is used for receiving the information of the second UE.

Description

Relay transmission method and device

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and apparatus for relay transmission.

Background

In the long term evolution (Long Term Evolution, LTE) technology, information interaction is performed between a base station and a terminal device, and as a part of terminal devices may be far away from the base station, the part of terminal devices cannot access the base station, or signals are poor, in order to meet the requirements on communication rate and communication quality, the terminal and the base station need to transmit through a relay technology, so that the information interaction between the terminal and the base station is ensured, coverage expansion of a cell is improved, cell capacity is improved, and cell throughput is homogenized, so that how to perform relay transmission becomes a key problem.

Disclosure of Invention

In order to overcome the technical problems or at least partially solve the technical problems, the following technical schemes are specifically proposed:

according to a first aspect, an embodiment of the present invention provides a method for relaying transmissions, performed by a first user equipment UE, comprising:

receiving configuration information sent by a base station, wherein the configuration information is used for receiving information of a second UE;

receiving information of a second UE according to the configuration information;

and forwarding the received information of the second UE.

Wherein the configuration information includes:

identity of the second UE; radio network temporary identity, RNTI, information of the second UE; downlink control channel configuration information of the second UE; downlink control channel configuration information of a first UE; data channel configuration information of a first UE; data channel configuration information of the second UE;

the configuration information of the downlink control channel PDCCH comprises at least one of the following: the method comprises the steps of searching space types of a downlink control channel, maximum repetition times Rmax, a starting subframe, an offset, an available subframe, a downlink control information DCI format and downlink control channel resource configuration information;

wherein the data channel configuration information includes at least one of: configuration information of an uplink data channel (PUSCH), configuration information of a downlink data channel (PDSCH), transmission mode of a data channel, pilot frequency information, an uplink usable subframe, a downlink usable subframe, multiple hybrid automatic repeat request (HARQ) process parameters and a control region size in the subframe.

Specifically, receiving information of the second UE according to the configuration information includes:

acquiring configuration information based on a downlink control channel of a second UE according to the configuration information, monitoring the downlink control channel of the second UE according to the acquired configuration information of the downlink control channel of the second UE, and decoding to obtain first scheduling information, wherein the scheduling information corresponding to a data channel of the second UE is used for indicating the reception of the data channel of the second UE, and the first scheduling information is used for indicating the reception of the data channel of the second UE;

and receiving the data information of the second UE according to the first scheduling information.

acquiring configuration information of a downlink control channel of a first UE according to the configuration information, monitoring the downlink control channel of the first UE according to the acquired configuration information of the downlink control channel of the first UE, and decoding to obtain first scheduling information;

Specifically, according to the first scheduling information, receiving data information of the second UE includes:

receiving uplink data information of the second UE on an uplink data channel of the second UE according to the first scheduling information; and/or the number of the groups of groups,

And receiving the downlink data information of the second UE on the downlink data channel of the second UE or the downlink data channel of the first UE according to the first scheduling information.

Further, the uplink data information of the second UE is sent by the second UE according to the control information directly received from the base station, or the uplink data information of the second UE is sent by the second UE according to the control information forwarded by the first UE.

Forwarding the received information of the second UE, including:

receiving second scheduling information sent by the base station, wherein the second scheduling information is used for forwarding data information of the second UE by the first UE;

and forwarding the received data information of the second UE according to the second scheduling information.

Further, the data information of the second UE is received at the second UE according to the control information directly received from the base station, or the data information of the second UE is received at the second UE according to the control information forwarded by the first UE.

Specifically, receiving the second scheduling information sent by the base station includes:

and monitoring a downlink control channel of the second UE and/or a downlink control channel of the first UE, and decoding to obtain second scheduling information.

Specifically, monitoring a downlink control channel of the second UE and/or a downlink control channel of the first UE, and successfully decoding to obtain first scheduling information and/or second scheduling information, including:

Monitoring a downlink control channel of the second UE and/or a downlink control channel of the first UE, acquiring scheduling information of a data channel, and determining first scheduling information and/or second scheduling information based on indication information in the scheduling information of the data channel; and/or the number of the groups of groups,

monitoring a downlink control channel of a second UE and/or a downlink control channel of a first UE, acquiring scheduling information of a data channel, determining first scheduling information based on indication information in the scheduling information of the data channel, and determining second scheduling information based on any one of preset relay transmission configuration information and a preset mapping relation and the first scheduling information; and/or the number of the groups of groups,

monitoring a downlink control channel of the second UE and/or a downlink control channel of the first UE, acquiring scheduling information of a data channel, determining second scheduling information based on indication information in the scheduling information of the data channel, and determining first scheduling information based on any one of preset relay transmission configuration information and a preset mapping relation and scheduling information corresponding to the data information of the second UE.

The preset mapping relation is a mapping relation between scheduling information corresponding to a data channel of the second UE and scheduling information corresponding to the data information of the second UE.

Specifically, monitoring a downlink control channel of the second UE and/or a downlink control channel of the first UE, and decoding to obtain first scheduling information and/or second scheduling information, including:

monitoring a UE specific search space of the first UE and/or a UE specific search space of the second UE, and performing blind detection through a Radio Network Temporary Identifier (RNTI) of the first UE and/or an RNTI of the second UE;

the blind detection is successful and the scheduling information corresponding to the uplink data channel and/or the scheduling information corresponding to the downlink data channel are obtained through decoding;

determining that the scheduling information is used for scheduling the first UE and/or the second UE through at least one of RNTI (radio network temporary identifier) used for blind detection, a search space corresponding to the received scheduling information and information bits carried in the scheduling information;

the first scheduling information and/or the second scheduling information is determined based on the determined scheduling information being used to schedule the first UE and/or the second UE.

Specifically, monitoring a UE-specific search space of the first UE and/or a UE-specific search space of the second UE, and performing blind detection through an RNTI of the first UE and/or an RNTI of the second UE, including:

monitoring a UE specific search space of the first UE, and performing blind detection through an RNTI of the first UE; and/or the number of the groups of groups,

monitoring a UE specific search space of a first UE, and performing blind detection through the RNTI of the first UE and the RNTI of a second UE; and/or the number of the groups of groups,

Monitoring a UE specific search space of the first UE and a UE specific search space of the second UE, and performing blind detection through RNTI corresponding to the search spaces; and/or the number of the groups of groups,

and monitoring the UE specific search space of the first UE and the UE specific search space of the second UE, and performing blind detection in each UE specific search space through the RNTI of the second UE and the RNTI of the first UE.

Further, the method further comprises: when more than one scheduling information for forwarding the second UE data information and/or more than one scheduling information corresponding to the second UE data channel are obtained, determining a mapping relation between each scheduling information for forwarding the second UE data information and each scheduling information corresponding to the second UE data channel according to a predefined mapping rule, where the predefined mapping rule is a mapping rule between the scheduling information for forwarding the second UE data information and the scheduling information corresponding to the second UE data channel.

Specifically, forwarding the received information of the second UE includes:

before the received data information of the second UE, adding a Media Access Control (MAC) frame header or a Radio Link Control (RLC) frame header;

and forwarding the data information of the second UE added with the frame header.

acquiring downlink control channel configuration information of the second UE and/or downlink control channel configuration information of the first UE according to the configuration information;

according to the acquired downlink control channel configuration information of the second UE and/or the downlink control channel configuration information of the first UE, monitoring a downlink control channel of the first UE and/or a downlink control channel of the second UE, and decoding to obtain the downlink control information of the second UE;

forwarding the received information of the second UE, including:

and forwarding the downlink control information of the second UE to the second UE on a downlink control channel of the second UE.

Further, after receiving the configuration information sent by the base station, the method further includes:

judging whether control information obtained by decoding according to the configuration information is used for scheduling the first UE and/or the second UE according to at least one of the following information: information bits carried in the control message, a scrambled RNTI of the control message, and a search space for decoding the control message.

Wherein the content carried in the information bits includes at least one of: the method comprises the steps of identifying an identity of a first UE, identifying a second UE, identifying an RNTI of the first UE, identifying an RNTI of the second UE, and identifying information of a mapping relationship between the first UE and the second UE.

Further, the method further comprises: when the first UE forwards, the content and/or information bits of the forwarded message are changed.

Further, the first UE reports to the base station at least one of the following capabilities:

the method has the capability of receiving on an uplink frequency band or an uplink subframe;

the method has the capability of transmitting on a downlink frequency band or a downlink subframe;

full duplex capability.

According to a second aspect, an embodiment of the present invention further provides a method for relaying transmission, including:

the base station sends configuration information to the first UE;

the base station sends information of the second UE to the second UE through the first UE according to the configuration information; and/or the number of the groups of groups,

the base station receives information of a second UE forwarded by the first UE according to the configuration information;

wherein the configuration information is used to forward information of the second UE at the first UE.

The method comprises the steps of identifying a second UE, carrying out Radio Network Temporary Identifier (RNTI) information of the second UE, downlink control channel configuration information of a first UE, data channel configuration information of the first UE and data channel configuration information of the second UE;

the downlink control channel configuration information includes at least one of the following: the method comprises the steps of searching space types of a downlink control channel, maximum repetition times Rmax, a starting subframe, an offset, an available subframe, a downlink control information DCI format and downlink control channel resource configuration information;

Wherein the data channel configuration information includes at least one of: configuration information of an uplink data channel, configuration information of a downlink data channel, transmission mode of the data channel, pilot frequency information, an uplink available subframe, a downlink available subframe, multiple hybrid automatic repeat request (HARQ) process parameters and a control area size in the subframe.

Specifically, the base station sends information of the second UE to the second UE through the first UE according to the configuration information, including:

the base station sends control information and data information of the second UE to the second UE through the first UE according to the configuration information; or,

and the base station sends control information to the second UE according to the configuration information, and sends data information of the second UE to the second UE through the first UE.

Specifically, the base station receives information of the second UE forwarded by the first UE according to the configuration information, including:

the base station sends control information of the second UE to the second UE through the first UE according to the configuration information, and receives data information of the second UE forwarded by the first UE; or,

and the base station sends control information to the second UE according to the configuration information and receives the data information of the second UE forwarded by the first UE.

Specifically, the base station sends data information of the second UE to the second UE through the first UE, including:

The base station sends second scheduling information and first scheduling information to the first UE on a downlink control channel of the second UE and/or a downlink control channel of the first UE according to the configuration information, wherein the first scheduling information is used for indicating the receiving of a data channel of the second UE, and the second scheduling information is used for forwarding the data information of the second UE by the first UE;

and transmitting data information of the second UE to the second UE through the first UE based on the second scheduling information and the first scheduling information.

Specifically, the base station sends control information of the second UE to the second UE through the first UE, including:

and the base station sends the control information of the second UE to the second UE through the first UE on the downlink control channel of the first UE and/or the downlink control channel of the first UE according to the configuration information.

Specifically, the base station receives data information of a second UE forwarded by a first UE, including:

And receiving the data information of the second UE forwarded by the first UE based on the second scheduling information and the first scheduling information.

Further, the method further comprises: the base station indicates that the scheduling information sent in the downlink control channel is used to schedule the first UE and/or schedule the second UE by at least one of:

scrambling the downlink control channel by using the RNTI in the configuration information;

according to the downlink control channel configuration information of the first UE or the second UE in the configuration information, transmitting downlink control information on the search space of the first UE and/or the search space of the second UE;

generating information bits in Downlink Control Information (DCI) carried by a downlink control channel according to a predefined rule, wherein the content carried in the information bits comprises at least one of the following: the method comprises the steps of identifying an identity of a first UE, identifying a second UE, identifying an RNTI of the first UE, identifying an RNTI of the second UE, and identifying information of a mapping relationship between the first UE and the second UE.

Specifically, the base station receives information of the second UE forwarded by the first UE and/or information sent by the second UE according to the configuration information, including:

the base station sends downlink control information to the first UE on a downlink control channel of the second UE and/or a downlink control channel of the first UE according to the configuration information, wherein the downlink control information is used for indicating scheduling information of the second UE sending information; and/or the number of the groups of groups,

The base station sends a downlink control message to the second UE on a downlink control channel of the second UE according to the configuration information, wherein the downlink control message is used for indicating scheduling information of the second UE sending information; and/or the number of the groups of groups,

and the base station receives the information sent by the second UE according to the scheduling information.

Further, the method further comprises: the base station scrambles an uplink authorization message corresponding to the uplink data of the corresponding second UE and/or a downlink authorization message corresponding to the downlink data of the corresponding second UE through a Radio Network Temporary Identifier (RNTI) of the second UE and/or an RNTI of the first UE; the method comprises the steps of,

and the base station sends uplink authorization information corresponding to uplink data of the second UE and/or downlink authorization information corresponding to downlink data of the second UE after scrambling in a downlink control channel of the corresponding second UE and/or a downlink control channel of the first UE according to the downlink control channel configuration information, wherein the uplink authorization information carries scheduling information corresponding to the uplink data of the second UE, and the downlink authorization information carries scheduling information corresponding to the downlink data of the second UE.

Further, the method further comprises:

and according to the downlink control channel configuration information of the first UE, sending uplink grant information of uplink data which the first UE needs to forward and/or downlink grant information of downlink data which the first UE needs to forward in a downlink control channel of the first UE. And/or the number of the groups of groups,

According to the downlink control channel configuration information of the second UE, sending uplink authorization information of uplink data which the first UE needs to forward and/or downlink authorization information of downlink data which the first UE needs to forward in the downlink control channel of the second UE,

the uplink authorization message carries scheduling information of the first UE for forwarding uplink data, and the downlink authorization message carries scheduling information of the first UE for forwarding downlink data.

Further, the method further comprises the following steps:

further, the method further comprises:

the base station causes the first UE to acquire scheduling information for transmission between the first UE and the second UE by at least one of:

transmitting an uplink authorization message of an uplink data service and/or a downlink authorization message of a downlink data service of the second UE in a downlink control channel of the second UE;

transmitting an uplink authorization message of an uplink data service and/or a downlink authorization message of a downlink data service of a second UE in a downlink control channel of a first UE;

and transmitting a transmission authorization message of the data service between the first UE and the second UE in a downlink control channel of the first UE.

The authorization message is scrambled by the base station through the RNTI of the first UE or the RNTI of the second UE.

Specifically, by scheduling the first UE and/or the second UE, and based on configuration information of data information and/or configuration information of control information, uplink reception is performed, including:

According to the uplink forwarding scheduling information of the first UE, uplink data sent by the first UE on an uplink data channel is received at a scheduled resource position;

wherein the downlink transmission is performed by scheduling the first UE and/or scheduling the second UE and based on the configuration information of the data information and/or the configuration information of the control information, including

And transmitting downlink data to the first UE through a downlink data channel at the scheduled resource position according to the corresponding scheduling information received to the downlink of the first UE.

According to a third aspect, an embodiment of the present invention further provides a first UE, including:

the first receiving module is used for receiving configuration information sent by the base station, wherein the configuration information is used for receiving information of the second UE;

the first receiving module is further used for receiving information of the second UE according to the configuration information;

and the forwarding module is used for forwarding the information of the second UE received by the first receiving module.

According to a fourth aspect, an embodiment of the present invention further provides a base station, including:

a sending module, configured to send configuration information to a first UE;

the sending module is further used for sending information of the second UE to the second UE through the first UE according to the configuration information;

the second receiving module is used for receiving the information of the second UE forwarded by the first UE according to the configuration information;

Wherein the configuration information is used to forward information of the second UE at the first UE. According to a fifth aspect, an embodiment of the present invention further provides a terminal device, including: a processor; and

a memory configured to store machine-readable instructions that, when executed by a processor, cause the processor to perform the method of relaying transmissions of the first aspect.

According to a sixth aspect, an embodiment of the present invention further provides a base station, including: a processor; and

a memory configured to store machine-readable instructions that, when executed by a processor, cause the processor to perform the method of relay transmission of the second aspect.

Compared with the prior art, the first UE receives the configuration information sent by the base station, wherein the configuration information is used for receiving the information of the second UE, then receives the information of the second UE according to the configuration information, and then forwards the received information of the second UE, so that relay transmission can be carried out between the base station and a remote node (second UE) through a relay node (first UE).

Compared with the prior art, the base station transmits configuration information to the first UE, and then the base station transmits information of the second UE to the second UE through the first UE according to the configuration information; and/or the base station receives the information of the second UE forwarded by the first UE according to the configuration information, wherein the configuration information is used for forwarding the information of the second UE at the first UE, so that relay transmission can be performed between the base station and a remote node (second UE) through a relay node (first UE).

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic flow chart of a method for relay transmission according to an embodiment of the present invention;

fig. 2 is a flowchart of another method for relay transmission according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a relay used only for an uplink data channel in an embodiment of the present invention;

fig. 4 is a schematic diagram of a method for a first UE to obtain an uplink scheduling message according to the first embodiment;

fig. 5 is a schematic diagram corresponding to a second method for the first UE to obtain the uplink scheduling message in the first embodiment;

fig. 6 is a schematic diagram corresponding to a third method for a first UE to obtain a scheduling message for uplink transmission in the first embodiment;

fig. 7 is a schematic diagram of a first UE acquiring scheduling information through two uplink grant messages sent by a base station in the first embodiment;

fig. 8 is a schematic diagram of a first UE acquiring scheduling information by acquiring an uplink grant message sent by a base station;

Fig. 9 is a schematic diagram of a relay node forwarding an uplink data channel of a remote node and forwarding a downlink data channel transmission of a base station in the embodiment of the present invention;

fig. 10 is a schematic diagram of a relay node forwarding an uplink data channel of a remote node and forwarding a downlink data channel transmission and a downlink control channel transmission of a base station according to an embodiment of the present invention;

fig. 11 is a schematic diagram of a position of a UE2 downlink control channel UE specific search space and/or a position of a UE3 downlink control channel UE specific search space that is earliest after the UE1 is successfully decoded in the same period as the UE1 downlink control channel UE specific search space that is successfully decoded;

fig. 12 is a schematic diagram of a position of a UE2 downlink control channel UE specific search space and/or a position of a UE3 downlink control channel UE specific search space that is earliest after the UE1 is successfully decoded, and the UE1 downlink control channel UE specific search space is in a different period;

fig. 13 is a schematic diagram of relay forwarding of a downlink control message of UE2 and/or UE3 at a candidate location in a UE2 and/or UE3UE specific search space;

fig. 14 is a schematic diagram of n subframes after a base station performs scheduling for uplink/downlink data transmission at a resource position not earlier than an end position of a UE-specific search space of an earliest UE2 and/or UE3 after the UE1 completes decoding;

FIG. 15 is a diagram illustrating an example of upstream data forwarding;

fig. 16 is a schematic diagram of an apparatus structure of a first UE according to an embodiment of the present invention;

fig. 17 is a schematic diagram of an apparatus structure of a base station according to an embodiment of the present invention;

fig. 18 is a block diagram of a computing system of a base station or user equipment according to an embodiment of the present invention.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.

It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As used herein, a "terminal" or "terminal device" includes both a device of a wireless signal receiver having no transmitting capability and a device of receiving and transmitting hardware having receiving and transmitting hardware capable of bi-directional communication over a bi-directional communication link, as will be appreciated by those skilled in the art. Such a device may include: a cellular or other communication device having a single-line display or a multi-line display or a cellular or other communication device without a multi-line display; a PCS (Personal Communications Service, personal communication system) that may combine voice, data processing, facsimile and/or data communication capabilities; a PDA (Personal Digital Assistant ) that can include a radio frequency receiver, pager, internet/intranet access, web browser, notepad, calendar and/or GPS (Global Positioning System ) receiver; a conventional laptop and/or palmtop computer or other appliance that has and/or includes a radio frequency receiver. As used herein, "terminal," "terminal device" may be portable, transportable, installed in a vehicle (aeronautical, maritime, and/or land-based), or adapted and/or configured to operate locally and/or in a distributed fashion, to operate at any other location(s) on earth and/or in space. The "terminal" and "terminal device" used herein may also be a communication terminal, a network access terminal, and a music/video playing terminal, for example, may be a PDA, a MID (Mobile Internet Device ), and/or a mobile phone with a music/video playing function, and may also be a smart tv, a set top box, and other devices.

In the prior art, there are two relay forwarding methods, including:

the first is a relay forwarding method based on layer 3, wherein the relay node has a base station function. In this method, from the perspective of the node being relayed (which will be referred to as the remote node in this invention), the identity of the relay node is the base station with its own physical layer cell identity (Physical cell identity, PCID), and can implement the full functionality of the base station; from the perspective of the base station, the identity of the relay node is a node, the base station can schedule the communication resource request of the relay node and the remote node as the transmission request of the downlink service on the relay node, and then the relay node further schedules the communication resource between the relay node and the remote node.

The second method is a layer 3 based relay forwarding method designed in a terminal-to-terminal (D2D) communication system in proximity services (Proximity Service, proSe). In the method, the relay node does not do resource scheduling for the remote node, and the relay node selects transmission resources on an end link (Silelink, SL) to the remote node by itself, or the base station schedules transmission resources on the Silelink for the relay node, wherein the transmission resources comprise transmission resources of a Silelink control message and resources of a Silelink data message, and the transmission resources are respectively positioned in a control resource pool and a data resource pool which are special for the Silelink. And in the control message sent by the relay node, indicating the transmission position of the data message in the data resource pool. Within the coverage area of the relay node, the remote node and other non-remote nodes monitor and blindly check the complete control resource pool (except the resource position which cannot be monitored by the half duplex limitation), determine the corresponding data message transmission resource position according to the received control message content, receive the data message at the corresponding resource position and submit to the node high layer. The remote node high-level solves the Destination node information carried in the data message and determines itself as the Destination node (English full name) of the data message; and the other non-remote nodes receiving the data message high-level solve the destination node information carried in the data message, determine that the non-remote nodes are not the destination nodes of the data message, and discard the message.

However, both relay transmission methods belong to layer 3-based relay forwarding, and when a remote node switches a relay path (e.g., switches from relay transmission to transmission between a direct and a base station, or switches a relay node) and performs handover (handover), service continuity cannot be ensured; all the methods cannot be compatible with the physical layer design of the existing version of the IoT UE, so that when the existing version of the IoT UE is used as a remote node, both the methods cannot realize relay transmission for the remote IoT node, and a new version of the IoT UE must be deployed as the remote node, thereby greatly influencing the system cost; furthermore, because the repeated design is not supported in the IoT system, when the link performance between the remote IoT node and the relay node is poor, the reliability of the link between the relay node and the remote node cannot be ensured, especially for the case of uplink transmission of the remote IoT with limited transmission capability.

Furthermore, for the first method of relay transmission in the prior art, the main drawbacks are: the relay node needs to realize the functions of the base station, including resource scheduling and a high-level processing mechanism, and has high complexity and cost influence; furthermore, base station type relay nodes generally have poor support for relay node mobility, and are more difficult to deploy and costly than UE type relay nodes.

For the second method of relay transmission in the prior art, the main disadvantage is that: the remote node needs to blindly check the complete sidelink control resource pool, which may be larger than the UE-specific search space of the node, resulting in increased power consumption by the remote node for listening and blindly checking, thereby affecting the battery life of the remote node, negatively affecting the core requirements of the IoT system.

In order to solve the technical problem of relay transmission in the prior art, the embodiment of the invention provides a relay transmission method, which comprises the following steps: the method for relaying and transmitting the data message and the control message is characterized in that for the remote node with high repetition number, which is in the coverage area of the cell but has poor uplink and/or downlink quality, the remote node is provided with a proper relay node, so that the good link quality is realized between the remote node and the relay node, the repetition number required by the remote node in transmission and/or reception can be reduced, and the power consumption of the remote node is greatly saved; furthermore, by using the relay node with stronger UE capability, the success rate of transmission is improved, and/or the repetition number is reduced, so as to improve the utilization efficiency of the air interface resource. For a remote node outside the coverage area of a cell, a suitable relay node can be configured to establish a multi-hop link with a base station to perform uplink and downlink transmission, so that the coverage area of the cell is improved.

Further, compared with two relay methods in the background art, the method has the following beneficial effects: the invention does not belong to layer 3-based relay forwarding, and can ensure the service continuity of remote nodes through proper high-level design; in most application scenarios, the physical layer design in the present application allows the use of an existing version of IoT UE as a remote node, with good compatibility with existing deployments.

Fig. 1 is a schematic flow chart of a method for relay transmission according to an embodiment of the present invention, including:

step 101, a first UE receives configuration information sent by a base station; 102, the first UE receives the information of the second UE according to the configuration information; step 103, the first UE forwards the received information of the second UE.

The configuration information is used for receiving information of the second UE.

Wherein the configuration information includes at least one of:

The data channel configuration information includes at least one of: configuration information of an uplink data channel, configuration information of a downlink data channel, transmission mode of the data channel, pilot frequency information, an uplink available subframe, a downlink available subframe, multiple hybrid automatic repeat request (HARQ) process parameters and a control area size in the subframe.

Specifically, receiving information of the second UE according to the configuration information includes: acquiring downlink control channel configuration information of a second UE and/or downlink control channel configuration information of a first UE according to the configuration information, and monitoring the downlink control channel of the second UE and/or the downlink control channel of the first UE according to the acquired downlink control channel configuration information of the second UE and/or the downlink control channel configuration information of the first UE, wherein the first scheduling information is used for indicating the reception of a data channel of the second UE; and receiving the data information of the second UE according to the first scheduling information.

Specifically, the first UE receives data information of the second UE according to the first scheduling information, including:

the first UE receives uplink data information of the second UE on an uplink data channel of the second UE according to the first scheduling information; and/or the number of the groups of groups,

And the first UE receives the downlink data information of the second UE on a downlink data channel of the second UE or a downlink data channel of the first UE according to the first scheduling information.

The uplink data information of the second UE is sent by the second UE according to control information directly received from a base station, or the uplink data information of the second UE is sent by the second UE according to control information forwarded by the first UE.

Specifically, forwarding the received information of the second UE includes: receiving second scheduling information sent by a base station, wherein the second scheduling information is used for forwarding data information of a second UE by a first UE; and forwarding the received data information of the second UE according to the second scheduling information.

Wherein the data information of the second UE is received at the second UE according to control information received directly from a base station, or the data information of the second UE is received at the second UE according to control information forwarded by the first UE.

Specifically, receiving the second scheduling information sent by the base station includes: and monitoring a downlink control channel of the second UE and/or a downlink control channel of the first UE, and decoding to obtain second scheduling information.

Specifically, forwarding the received information of the second UE includes: before the received data information of the second UE, adding a Media Access Control (MAC) frame header or a Radio Link Control (RLC) frame header; and forwarding the data information of the second UE added with the frame header.

Specifically, receiving information of the second UE according to the configuration information includes: acquiring downlink control channel configuration information of the second UE and/or downlink control channel configuration information of the first UE according to the configuration information; according to the acquired downlink control channel configuration information of the second UE and/or the downlink control channel configuration information of the first UE, monitoring a downlink control channel of the first UE and/or a downlink control channel of the second UE, and decoding to obtain the downlink control information of the second UE;

specifically, forwarding the received information of the second UE includes: and forwarding the downlink control information of the second UE to the second UE on a downlink control channel of the second UE.

Further, after receiving the configuration information sent by the base station, the method further includes: judging whether control information obtained by decoding according to the configuration information is used for scheduling the first UE and/or the second UE according to at least one of the following information: information bits carried in the control message, a scrambled RNTI of the control message, and a search space for decoding the control message.

Wherein, the content carried in the information bit comprises at least one of the following: the method comprises the steps of identifying an identity of a first UE, identifying a second UE, identifying an RNTI of the first UE, identifying an RNTI of the second UE, and identifying information of a mapping relationship between the first UE and the second UE.

Compared with the prior art, the first UE receives the configuration information sent by the base station, wherein the configuration information is used for receiving the information of the second UE, then receives the information of the second UE according to the configuration information, and then forwards the received information of the second UE, so that relay transmission can be performed between the base station and a remote node (second UE) through a relay node (first UE).

Fig. 2 is a flowchart of another method for relaying transmission in an embodiment of the present invention, which is executed by a base station and includes:

step 201, a base station sends configuration information to a first UE; step 202, the base station sends information of the second UE to the second UE through the first UE according to the configuration information, and/or the base station receives information of the second UE forwarded by the first UE according to the configuration information.

Wherein the configuration information includes at least one of:

wherein the downlink control channel configuration information includes at least one of: the method comprises the steps of searching space types of a downlink control channel, maximum repetition times Rmax, a starting subframe, an offset, an available subframe, a downlink control information DCI format and downlink control channel resource configuration information;

Specifically, the base station sends information of the second UE to the second UE through the first UE according to the configuration information, including the following steps:

Specifically, the base station receives, according to the configuration information, information of the second UE forwarded by the first UE, including:

the base station sends control information of the second UE to the second UE through a first UE according to the configuration information, and receives data information of the second UE forwarded by the first UE; or,

Specifically, the base station sends data information of the second UE to the second UE through the first UE, including: the base station sends second scheduling information and first scheduling information to the first UE on a downlink control channel of the second UE and/or a downlink control channel of the first UE according to the configuration information, wherein the first scheduling information is used for the first UE to receive data information of the second UE, and the second scheduling information is used for the first UE to forward the data information of the second UE; and transmitting data information of the second UE to the second UE through the first UE based on the second scheduling information and the first scheduling information.

Specifically, the base station sends control information of the second UE to the second UE through the first UE, including: and the base station sends the control information of the second UE to the second UE through the first UE on the downlink control channel of the first UE and/or the downlink control channel of the first UE according to the configuration information.

Specifically, the base station receives data information of the second UE forwarded by the first UE, including: the base station sends second scheduling information and first scheduling information to the first UE on a downlink control channel of the second UE and/or a downlink control channel of the first UE according to the configuration information, wherein the first scheduling information is used for indicating the receiving of a data channel of the second UE, and the second scheduling information is used for forwarding the data information of the second UE by the first UE; and receiving the data information of the second UE forwarded by the first UE based on the second scheduling information and the first scheduling information.

Compared with the prior art, the base station transmits configuration information to the first UE, and then transmits information of the second UE to the second UE through the first UE according to the configuration information; and/or the base station receives the information of the second UE forwarded by the first UE according to the configuration information, wherein the configuration information is used for forwarding the information of the second UE at the first UE, so that relay transmission can be performed between the base station and a remote node (second UE) through a relay node (first UE).

The embodiment of the invention provides a relay forwarding method not based on layer 3. The embodiment of the invention comprises the relay forwarding of an uplink data channel, the relay forwarding of a downlink data channel and the relay forwarding of a downlink control channel.

In the embodiment of the invention, the first UE may be a relay node with relay capability in a cell coverage area, and the second UE may be a remote node in the cell coverage area or outside the cell coverage area. The relay node monitors a downlink control channel sent by the base station, directly or indirectly acquires scheduling information of an uplink data channel of the remote node, scheduling information of a downlink data channel, scheduling information of an uplink data channel of a relay node forwarding remote node, and scheduling information of a downlink data channel of the relay node forwarding remote node, and performs uplink transmission and/or downlink reception between the relay node and the base station and transmission and/or reception between the relay node and the remote node according to the content of the four scheduling information. The remote node monitors a downlink control channel sent by the base station and/or forwarded by the relay node, directly acquires scheduling information of an uplink data channel and/or scheduling information of a downlink data channel of the remote node, and performs uplink transmission and/or downlink reception according to the content of the scheduling information. The base station schedules the transmission/reception between the remote node and the relay node and the uplink transmission/downlink reception between the relay node and the base station through a downlink control channel directly transmitted to the relay node and/or a downlink control channel directly transmitted or forwarded to the remote node through the relay node, and performs uplink reception or downlink transmission according to the content of the scheduling information of the relay node and/or the content of the scheduling information of the remote node.

In the embodiment of the invention, each remote node uses one relay node to relay and forward; the relay nodes utilized by the plurality of remote nodes may be identical, i.e. one relay node may provide relay functionality for the plurality of remote nodes.

The embodiment of the invention is suitable for three application scenes: in the first scenario, the relay node only forwards the uplink data channel transmission of the remote node, and does not forward the downlink data channel transmission of the base station and the downlink control channel transmission of the base station; the second scenario is that the relay node forwards the uplink data channel transmission of the remote node, forwards the downlink data channel transmission of the base station, and does not forward the downlink control channel transmission of the base station; and thirdly, the relay node transmits an uplink data channel of the remote node, a downlink data channel of the base station and a downlink control channel of the base station.

The scene classification method is irrelevant to whether the uplink/downlink transmission of other signal channels is relayed or not, for example, in the above scenes, the relay node is supported to not relay the downlink broadcast signal/channel and the synchronous signal/channel of the base station, and the remote node obtains the downlink broadcast message and the synchronous signal from the base station by itself.

Based on the application scene type, the following description of relay transmission is performed through a plurality of specific embodiments, wherein the first embodiment is a method for performing relay transmission in the scene; the second embodiment is a method for relay transmission in the second scenario; embodiment three is a method for performing relay transmission in scene three, which is specifically described in the following embodiments.

Example 1

The embodiment describes a scenario in which the relay node performs only uplink relay forwarding, and the manner of performing relay transmission in the scenario is introduced from the perspective of the remote node, the relay node, and the base station, respectively.

(one) for uplink data channel/uplink shared channel:

the behavior of the remote node includes the following operational steps:

1. the remote node obtains uplink scheduling information from the base station according to the behavior without relay, and the method comprises the following steps:

the remote node acquires data channel configuration information and downlink control channel configuration information from the base station through radio resource control (Radio Resource Control, RRC) signaling, monitors a downlink control channel (UE) specific search space of the remote node according to the configuration information, blindly detects a downlink control channel candidate set by using a radio network temporary identifier (Radio Network Temporary Identifier, RNTI) of the remote node, decodes the downlink control channel candidate set to obtain an uplink grant message sent by the base station, and acquires scheduling information of an uplink data channel from the uplink grant message.

2. The remote node sends an uplink data message to the base station, including:

and the remote node transmits the uplink data channel on the scheduled resource position according to the content of the obtained uplink data channel scheduling information.

The relay node behavior comprises the following operation steps:

1. the relay node obtains configuration information of the relay node and the remote node from the base station, and the configuration information comprises:

the relay node obtains from the base station through RRC signaling: the identity and/or RNTI of the remote node, the downlink control channel configuration information of the relay node and the remote node, and the data channel configuration information of the relay node and the remote node.

The downlink control channel configuration information of the remote node comprises at least one of the following: downlink control channel search space type, maximum number of repetitions Rmax, starting subframe, available subframe, downlink control information DCI format, downlink control channel resource configuration (e.g., time-frequency resource location: narrowband, carrier, physical resource block (Physical Resource Block, PRB), control resource set (Control Resource Set, CORESET), where CORESET configuration parameters include CORESET activation or release, timing information, ID, frequency domain location, starting symbol, duration, resource element group (Resource Element Group, REG), control channel element (Control Channel Element, CCE) to REG mapping type, precoder granularity, interleaver column, offset index, transmission configuration indication (Transmission Configuration Indication, TCI) status identity, demodulation reference signal (Demodulation Reference Signal, DMRS) scrambling ID).

Wherein the data channel configuration information of the remote node includes at least one of: configuration information of uplink and/or downlink data channels, transmission modes of the data channels (such as transmission modes 1-9), pilot information, uplink available subframes and/or downlink available subframes, multiple hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) process parameters, and control region size within the subframes.

When the relay node has the capability of performing downlink reception on an uplink frequency band or an uplink subframe, the UE-specific search space of the downlink control channel of the relay node may be configured by the base station to be on an uplink carrier or the uplink subframe.

2. The relay node obtains scheduling information of uplink transmission of a remote node from a base station, and the method comprises the following steps:

the relay node monitors a downlink control channel (UE) specific search space of the remote node according to configuration information of the remote node, blindly detects a downlink control channel candidate set by using RNTI of the remote node, decodes the downlink control channel candidate set to obtain an uplink grant message of the remote node sent by the base station, and acquires scheduling information of an uplink data channel of the remote node from the uplink grant message;

and/or the number of the groups of groups,

the relay node monitors a downlink control channel (UE) specific search space of the relay node according to configuration information of the relay node, blindly detects a downlink control channel candidate set by using RNTI of the relay node or RNTI of the relay node and remote node, decodes the downlink control channel candidate set to obtain an uplink grant message of the remote node sent by the base station, and acquires scheduling information of an uplink data channel of the remote node from the uplink grant message.

When the relay node relays and forwards for a plurality of remote nodes, the relay node monitors in the specific search space of all the remote nodes and/or downlink control channels (UE) of the relay node, and blind detection is carried out by using RNTI of the relay node and/or all the remote nodes.

The relay node successfully performs blind detection by using RNTI of the relay node in a specific search space of a downlink control channel (UE) of the relay node, decodes the RNTI to obtain an uplink authorization message, and determines that the uplink authorization message is sent to the remote node according to information bits carried in the uplink authorization message;

or, the relay node successfully performs blind detection by using the RNTI of the remote node in a specific search space of the downlink control channel UE of the relay node, decodes the RNTI to obtain an uplink authorization message, and determines that the uplink authorization message is sent to the remote node according to the RNTI for blind detection and/or information bits carried in the uplink authorization message;

or, the relay node successfully performs blind detection by using the RNTI of the remote node corresponding to the search space in the specific search space of the downlink control channel UE of the remote node, decodes the RNTI to obtain an uplink authorization message, and determines that the uplink authorization message is sent to the remote node according to the specific search space of the UE and/or the RNTI for blind detection and/or information bits carried in the uplink authorization message.

The information bit carried in the uplink grant message may be an identity identifier (such as a UE ID) of the remote node, or an RNTI of the remote node, or identification information corresponding to a mapping relationship between the relay node and the remote node, where the identification information may be an index of a mapping relationship configured or preset by the base station.

3. The relay node obtains the scheduling information of the uplink relay forwarding behavior of the relay node, comprising:

the relay node obtains the scheduling information of the directly indicated uplink relay forwarding behavior from the base station;

and/or the relay node acquires the scheduling information of the uplink relay forwarding behavior indirectly indicated by the base station.

The relay node may obtain, from the base station, scheduling information of a part of uplink relay forwarding actions indicated directly and scheduling information of the rest of uplink relay forwarding actions indicated indirectly.

The method for obtaining the scheduling information of the directly indicated uplink relay forwarding behavior from the base station by the relay node comprises the following steps:

the relay node monitors a downlink control channel (UE) specific search space of a remote node according to configuration information of the remote node, blindly detects a downlink control channel candidate set by using RNTI of the relay node, decodes the downlink control channel candidate set to obtain an uplink grant message of the relay node sent by a base station, and acquires scheduling information of an uplink data channel for forwarding of the relay node from the uplink grant message; and/or the number of the groups of groups,

The relay node monitors a downlink control channel (UE) specific search space of the relay node according to configuration information of the relay node, blindly detects a downlink control channel candidate set by using RNTI of the relay node or RNTI of both the relay node and a remote node, decodes the downlink control channel candidate set to obtain an uplink grant message of the relay node sent by the base station, and acquires scheduling information of the relay node for forwarding an uplink data channel from the uplink grant message.

When the relay node relays and forwards for a plurality of remote nodes, the relay node monitors in the specific search space of all the remote nodes and/or downlink control channels (UE) of the relay node, and blind detection is carried out by using RNTI of the relay node and/or all the remote nodes. The relay node successfully decodes the uplink grant messages of more than one remote node and the uplink grant messages of more than one relay node, and determines the mapping relation between the uplink grant messages of the remote node and the uplink grant messages of the relay node according to the search space for receiving the uplink grant messages and/or the RNTI used by blindly checking the uplink grant messages and/or information bits carried in the uplink grant messages and/or the time sequence or frequency domain resource position for receiving the uplink grant messages.

The method comprises the steps that a relay node successfully performs blind detection by using RNTI of the relay node in a specific search space of a downlink control channel (UE) of the relay node, decodes the RNTI to obtain an uplink authorization message, and determines that the uplink authorization message is sent to the relay node according to information bits carried in the uplink authorization message;

or, the relay node successfully performs blind detection by using the RNTI of the remote node in a specific search space of the downlink control channel UE of the relay node, decodes the RNTI to obtain an uplink authorization message, and determines that the uplink authorization message is sent to the relay node according to the RNTI for blind detection and/or information bits carried in the uplink authorization message;

or, the relay node successfully performs blind detection by using the RNTI of the remote node corresponding to the search space in the specific search space of the downlink control channel UE of the remote node, decodes the RNTI to obtain an uplink authorization message, and determines that the uplink authorization message is sent to the relay node according to the specific search space of the UE and/or the RNTI for blind detection and/or information bits carried in the uplink authorization message.

The information bit carried in the uplink grant message may be an identity identifier (such as a UE ID) of the relay node, or an RNTI of the relay node, or identification information corresponding to a mapping relationship between the relay node and the remote node, where the identification information may be an index of a mapping relationship configured or preset by the base station.

The method for obtaining the scheduling information of the uplink relay forwarding behavior indirectly indicated by the base station for the relay node comprises the following steps:

the relay node obtains the scheduling information of an uplink data channel of a remote node from the base station; the relay node calculates and determines the scheduling information of the uplink relay forwarding behavior of the relay node according to the scheduling information of the uplink data channel of the remote node and a preset mapping relation;

or, the relay node acquires the scheduling information of the uplink relay forwarding behavior of the relay node from the base station; the relay node calculates and determines the scheduling information of an uplink data channel of the remote node according to the scheduling information of the uplink relay forwarding behavior of the relay node and a preset mapping relation;

4. the relay node receives an uplink data message sent by a remote node to a base station, and the method comprises the following steps:

the relay node receives an uplink data channel sent by the remote node at a scheduled resource position according to the content of the obtained uplink data channel scheduling information of the remote node and successfully decodes the uplink data channel;

the scheduled resource location may be an uplink carrier or an uplink subframe, and the relay node needs to have a capability of receiving on the uplink carrier or the uplink subframe.

5. The relay node forwards an uplink data message of a remote node to a base station, comprising:

And the relay node forwards the uplink data channel sent by the remote node to the base station on the scheduled carrier according to the content of the uplink data channel scheduling information of the relay forwarding behavior of the relay node.

The behavior of the base station comprises the following operation steps:

1. the base station performs channel configuration on the remote node and the relay node, and comprises the following steps:

the base station sends the data channel configuration information and the downlink control channel configuration information of the remote node to the remote node through RRC signaling, and sends the data channel configuration information and the downlink control channel configuration information of the relay node and/or the remote node to the relay node.

2. The base station schedules uplink transmission of the remote node, including:

and the base station sends an uplink authorization message of uplink data service of the remote node in a specific search space of downlink control channel (UE) of the remote node according to the downlink control channel configuration information of the remote node, and scrambles the downlink data service by using RNTI of the remote node, wherein the uplink authorization message carries scheduling information of the uplink data of the remote node.

3. The base station schedules the uplink forwarding of the relay node, and the method comprises the following steps:

the base station sends an uplink authorization message of uplink data service to be forwarded by the relay node in a specific search space of a downlink control channel (UE) of the relay node according to downlink control channel configuration information of the relay node, and uses RNTI of the relay node or a remote node to scramble, wherein the uplink authorization message carries scheduling information of uplink data of the relay node;

Or, the base station sends an uplink authorization message of uplink data service to be forwarded by the relay node in a downlink control channel (UE) specific search space of the remote node according to downlink control channel configuration information of the remote node, and uses RNTI scrambling of the relay node, wherein the uplink authorization message carries scheduling information of uplink data of the relay node.

In the uplink scheduling message of the relay node, the base station directly indicates the uplink transmission corresponding to the scheduling message by using an information bit or indirectly indicates the uplink transmission corresponding to the scheduling message by scrambling RNTI as the transmission of the relay node itself or the uplink transmission which needs to be forwarded by a specific remote node. The content directly indicated by the information bit may be an identity identifier (such as UE ID) of the relay/remote node, or RNTI, or identification information corresponding to a mapping relationship between the relay node and the remote node, where the identification information may be an index of a mapping relationship configured or preset by the base station.

When the relay node forwards the relay messages for the plurality of remote nodes, additionally, the base station sequentially sends uplink scheduling messages of the relay node in a specific search space of a downlink control channel (UE) of the relay node according to the sequence of sending the scheduling messages for the plurality of remote nodes.

4. A base station schedules transmissions between a relay node and a remote node, comprising:

the base station schedules the uplink transmission of the remote node according to the uplink transmission, and configures the relay node to monitor the scheduling information of the remote node; the base station enables the relay node to correspondingly acquire the scheduling information of the transmission between the remote node and the relay node through scheduling of the remote node, and does not transmit additional scheduling information;

or, the base station, in addition to the scheduling of the uplink transmission of the remote node, additionally sends an uplink grant message of the uplink data traffic of the remote node or a transmission grant message of the data traffic of the relay node to the remote node in the downlink control channel UE specific search space of the relay node, and scrambles the grant message with the RNTI of the relay node or the RNTI of the remote node.

Wherein, the base station uses information bit to directly indicate or indirectly indicate the scheduling information through scrambling RNTI in the scheduling information of the transmission between the relay node and the remote node, and the scheduling information is used for scheduling the relay node or a specific remote node. The content directly indicated by the information bit may be an identity identifier (such as UE ID) of the relay/remote node, or RNTI, or identification information corresponding to a mapping relationship between the relay node and the remote node, where the identification information may be an index of a mapping relationship configured or preset by the base station.

When the relay node relays and forwards for a plurality of remote nodes, additionally, the base station sequentially sends the relay node in a downlink control channel (UE) specific search space of the relay node or sends the scheduling message transmitted between the relay node and the remote node in a corresponding position of a frequency domain according to the time sequence and/or the frequency domain resource position of the scheduling message sent by the plurality of remote nodes.

When the base station schedules the transmission between the relay node and the remote node, the scheduling message carries all the configuration information of the transmission, or carries part of the configuration information of the transmission, and indirectly indicates the rest of the configuration information which is not carried in the scheduling message through the uplink scheduling message of the remote node or the uplink scheduling message of the relay node according to a preset mapping relation.

The scheduling information of the transmission between the relay node and the remote node by the base station and the scheduling information of the transmission between the relay node and the base station by the base station can be carried in the same downlink control message. When the relay node relays and forwards for a plurality of remote nodes, one downlink control message carries scheduling information of transmission between one remote node and the relay node, and the relay node relays and forwards the scheduling information for the remote node; or, one downlink control message carries the scheduling information of the transmission between more than one remote node and the relay node, and the scheduling information of the relay node for repeating the relay for the more than one remote node. The base station directly indicates a specific field in the downlink control message to be used for scheduling as a relay node or a specific remote node in the downlink control message by using an information field, or does not directly indicate the specific field in the downlink control message to be used for scheduling as the relay node or the specific remote node in the downlink control message, and the relay node determines that the specific field in the downlink control message is used for scheduling the relay node or the specific remote node according to predefined configuration information. Additionally, when a downlink control message carries scheduling information of transmission between a remote node and a relay node and the relay node relays and forwards the scheduling information for the remote node, the base station indicates identity information of the remote node by using an RNTI scrambled for the downlink control message, and the relay node determines that a specific field in the downlink control message is used for scheduling the relay node or a certain remote node according to predefined configuration information and determines the identity information of the remote node by scrambling the RNTI.

5. The base station receives the uplink forwarding of the relay node, and the method comprises the following steps:

and the base station receives an uplink data channel sent by the relay node at the scheduled resource position according to the uplink forwarding scheduling information content of the relay node.

Additionally, the above steps of operation are not chronologically arranged. The actual time sequence of each operation step is determined according to the scheduling content of the base station and the downlink control channel configuration information content of the relay node and the remote node.

(II) for downlink data channel/downlink shared channel:

the remote node receives the downlink control channel and the downlink data channel according to the action without relay, and the method comprises the following steps:

the remote node obtains downlink control channel configuration information and downlink data channel configuration information from the base station through RRC signaling; the remote node monitors a downlink control channel (UE) specific search space of the remote node according to the configuration information, blindly detects a downlink control channel candidate set by using the RNTI of the remote node, decodes the downlink grant message to obtain a downlink data channel scheduling information from the downlink grant message, and sends the downlink grant message to the base station; and the remote node receives the downlink data channel at the scheduled resource position according to the content of the obtained downlink data channel scheduling information.

Further, the relay node obtains the scheduling information of the downlink data channel of the remote node from the base station, and does not receive and relay the downlink data channel.

The base station transmits the scheduling information received by the downlink data channel of the remote node to the remote node, and does not transmit the scheduling information of the downlink data channel of the remote node to the relay node.

Next, a relay forwarding method of uplink data information is described with reference to a specific example based on the application scenario of the first embodiment, as shown in fig. 3. The uplink shared channel PUSCH in this example may also be EPUSCH, MPUSCH, NPUSCH. The embodiment of the invention is not limited.

In this example, UE1 is a relay node with relay capability within cell coverage and UE2 and UE3 are remote nodes within cell coverage. Both UE2 and UE3 use UE1 to relay and forward the uplink data channel PUSCH, and both receive the downlink control channel PDCCH and the downlink data channel PDSCH directly from the base station.

The UE1 normally accesses to a cell, has a relay function, has a capability of performing downlink reception on an uplink frequency band or an uplink subframe and/or performing transmission on a downlink frequency band or a downlink subframe, and informs the capability to a base station through high-layer signaling. UE1 obtains self RNTI, downlink control channel configuration information and data channel configuration information from a base station. The UE-specific search space of the downlink control channel of UE1 may be configured by the base station on an uplink carrier/uplink subframe, or may be configured on a downlink carrier/downlink subframe.

The base station configures the UE1 to perform relay forwarding of uplink data transmission of the UE2 and the UE 3. UE1 obtains configuration information of UE2 and configuration information of UE3 from a base station through RRC signaling, including: UE ID, RNTI, downlink control channel configuration information, data channel configuration information.

The downlink control channel configuration information of the UE2 and/or the UE3 includes: downlink control channel search space type, maximum number of repetitions Rmax, starting subframe, available subframe, downlink control information DCI format, downlink control channel resource configuration (e.g. time-frequency resource location: narrowband, carrier, PRB, control resource set (Control Resource Set, CORESET), wherein CORESET configuration parameters include CORESET activation or release, timing information, ID, frequency domain location, starting symbol, duration, resource element group (Resource Element Group, REG), control channel element (Control Channel Element, CCE) to REG mapping type, precoder granularity, interleaver column, offset index, transmission configuration indication (Transmission Configuration Indication, TCI) status identity, demodulation reference signal (Demodulation Reference Signal, DMRS) scrambling ID).

Wherein the data channel configuration information of UE2 and/or UE3 comprises at least one of: configuration information of uplink and/or downlink data channels, transmission modes (such as transmission modes 1-9) of the data channels, pilot frequency information, uplink and/or downlink available subframes, multiple HARQ process parameters and control area size in the subframes.

UE2 and UE3 have the ability to access to the cell in the coverage area of the cell, and UE2 and UE3 normally access to the cell, and acquire self RNTI, downlink control channel configuration information and data channel configuration information from the base station.

UE2 and UE3 are configured by the base station to relay the uplink data transmission through UE1, and the configuration is transparent, that is, UE2 and UE3 do not need to know that the uplink data transmission is completed through relay, and uplink data transmission is performed according to the original design of the unrepeatered system.

And the UE1, the UE2 and the UE3 monitor in a configured search space in a downlink control channel configured by the base station and perform blind detection by using the RNTI to obtain a scheduling message of uplink transmission.

The specific way for the UE1 to obtain the uplink scheduling message includes: method one (as shown in fig. 4), method two (as shown in fig. 5), and method three (as shown in fig. 6):

the method comprises the following steps: UE1 monitors UE1 and UE2 and UE3 for a UE specific search space (USS), and performs blind detection with an RNTI corresponding to the search space;

for example, in this method, the base station transmits uplink grant messages #1 and #3 in the UE-specific search space of UE1, and uses the RNTI scrambling of UE1 to sequentially instruct the scheduling information for UE1 to forward uplink for UE2 and the scheduling information for UE1 to forward uplink for UE 3; transmitting an uplink grant message #2 in a UE specific search space of the UE2, scrambling with an RNTI of the UE2, and indicating scheduling information of uplink data transmission of the UE 2; an uplink grant message #4 is transmitted in the UE-specific search space of UE3, scrambled with the RNTI of UE3, for indicating scheduling information of uplink data transmission of UE 3.

When the UE1 uses the RNTI of the UE2 to successfully perform blind detection in the UE specific search space of the UE2 and decodes the UE specific search space to obtain an uplink grant message (UL grant) #2, the uplink grant message is considered to be used for indicating scheduling information of uplink data transmission of the UE2, and uplink shared channel (PUSCH) transmission of the UE2 is received according to the content of the uplink grant message # 2;

when the UE1 uses the RNTI of the UE3 to successfully perform blind detection in the UE specific search space of the UE3 and decodes the RNTI to obtain an uplink grant message #4, the uplink grant message is considered to be used for indicating scheduling information of uplink data transmission of the UE3, and uplink shared channel transmission of the UE3 is received according to the content of the uplink grant message # 4;

when the UE1 uses the RNTI of the UE1 to perform blind detection twice successfully in the UE specific search space of the UE1 and decodes two uplink grant messages #1 and #3, the uplink grant message is considered to be used for indicating the scheduling information of the uplink relay forwarding of the UE 1. According to the time sequence of receiving the uplink grant messages of UE2 and UE3 being UE2 earlier than UE3, it is considered that the uplink grant message #1 is used for indicating the scheduling information (corresponding to the uplink grant message # 2) for the UE1 to forward the uplink data of UE2, and the uplink grant message #3 is used for indicating the scheduling information (corresponding to the uplink grant message # 4) for the UE1 to forward the uplink data of UE 3. And forwarding the uplink data of the successfully decoded UE2 and UE3 according to the content of the uplink authorization message.

In this method, it is additionally possible that the base station sends two other uplink grant messages (for example #5 and # 6) in the UE specific search space of UE2 and UE3, uses the RNTI scrambling of UE1, and sequentially uses the scheduling information for indicating that UE1 performs uplink forwarding for UE2 and the scheduling information for UE1 performs uplink forwarding for UE3, and the UE2 and UE3 do not decode these two messages when blind checking with their RNTIs. When the UE1 uses the RNTI of the UE1 to successfully perform blind detection in the UE specific search space of the UE2 and decodes the uplink grant message, the uplink grant message is considered to be used for indicating the UE1 to forward the scheduling information of the uplink shared channel of the UE 2. Similarly, UE1 successfully performs blind detection using the RNTI of UE1 in the UE-specific search space of UE3, decodes the uplink grant message, and considers the uplink grant message to instruct UE1 to forward the scheduling information of the uplink shared channel of UE 3.

The second method is as follows: the UE1 monitors a UE specific search space of the UE1, and RNTI blind detection of the UE1, the UE2 and the UE3 is performed in the UE specific search space of the UE 1;

for example, in this method, the base station transmits, in a UE-specific search space of UE1, an uplink grant message #1 (RNTI scrambling of UE 1), an uplink grant message #2A (RNTI scrambling of UE 2), an uplink grant message #3 (RNTI scrambling of UE 1) and an uplink grant message #4A (RNTI scrambling of UE 3), which are sequentially used to instruct UE1 to perform uplink forwarding for UE2, uplink data transmission scheduling information of UE2, uplink forwarding scheduling information of UE1 for UE3, and uplink data transmission scheduling information of UE 3; transmitting an uplink grant message #2 in a UE specific search space of the UE2, scrambling with an RNTI of the UE2, and indicating scheduling information of uplink data transmission of the UE 2; an uplink grant message #4 is transmitted in the UE-specific search space of UE3, scrambled with the RNTI of UE3, for indicating scheduling information of uplink data transmission of UE 3.

The UE1 uses RNTI of the UE2 to successfully perform blind detection in a UE specific search space of the UE1, decodes to obtain an uplink grant message #2A, considers that the uplink grant message is used for indicating scheduling information of uplink data transmission of the UE2, and receives uplink shared channel (PUSCH) transmission of the UE2 and successfully decodes according to the content of the uplink grant message # 2A;

the UE1 uses RNTI of the UE3 to successfully perform blind detection in a UE specific search space of the UE1, decodes to obtain an uplink grant message #4A, considers that the uplink grant message is used for indicating scheduling information of uplink data transmission of the UE3, and receives uplink shared channel transmission of the UE3 according to the content of the uplink grant message #4A and successfully decodes;

the UE1 uses RNTI of the UE1 to perform blind detection twice successfully in the UE specific search space of the UE1, decodes the RNTI to obtain two uplink grant messages #1 and #3, and considers that the uplink grant messages are used for indicating the uplink relay forwarding scheduling information of the UE 1. According to the time sequence of receiving the uplink grant messages of UE2 and UE3 being UE2 earlier than UE3, it is considered that the uplink grant message #1 is used for indicating the UE1 to forward the scheduling information of the uplink data of UE2 (corresponding to the uplink grant message # 2a), and the uplink grant message #3 is used for indicating the UE1 to forward the scheduling information of the uplink data of UE3 (corresponding to the uplink grant message # 4a). And forwarding the uplink data of the successfully decoded UE2 and UE3 according to the content of the uplink authorization message.

In this method, it is additionally possible that the uplink grant message includes an information bit directly indicating the target UE of the uplink grant message, which may be an identity of the UE (e.g. UE ID), or an RNTI, or an index indicating a mapping relationship between the relay node and the remote node.

For example, when the base station configures UE1 to perform uplink relay for UE2/3, the mapping relation configuration index for UE1-UE2 is 1, the mapping relation configuration index for UE1-UE3 is 2, and the mapping relation configuration index for UE1 itself is 0.

The UE1 uses RNTI of the UE3 to successfully perform blind detection in a UE specific search space of the UE1, decodes to obtain an uplink grant message #4A, configures an index according to a mapping relation of information bits of the uplink grant message, which directly indicate a target UE, and takes the index as 2, and considers that the uplink grant message #4A is used for indicating scheduling information of an uplink shared channel of the UE 3; or, according to the information bit of the uplink grant message #4a, which directly indicates the target UE, being the mapping relationship configuration index and having a value of 0, the uplink grant message #4a is considered to be used to indicate the UE1 to forward the scheduling information of the uplink data of the UE3 to the base station.

For example, when the base station configures UE1 to perform uplink relay for UE2 and/or UE3, in the mapping relationship configuration for UE1 and all remote UEs, the index of the relay node, that is, UE1, is 0, and the index of all remote UEs, that is, UE2 and/or UE3 is 1.

The UE1 uses RNTI of the UE3 to successfully perform blind detection in a UE specific search space of the UE1, decodes to obtain an uplink grant message #4A, configures an index according to a mapping relation of information bits of the direct indication target UE in the uplink grant message #4A and takes the index as 1, and considers that the uplink grant message #4A is used for indicating scheduling information of an uplink shared channel of the UE 3; or, according to the information bit of the uplink grant message #4a, which directly indicates the target UE, being the mapping relationship configuration index and having a value of 0, the uplink grant message #4a is considered to be used to indicate the UE1 to forward the scheduling information of the uplink data of the UE3 to the base station.

For example, the UE1 performs blind detection successfully using the RNTI of the UE1 in the UE-specific search space of the UE1, and considers that the uplink grant message is used to instruct the UE1 to forward the scheduling information of the uplink data of the UE3 according to the RNTI of the UE3 that directly indicates the information bit of the target UE in the uplink grant message.

And a third method: the UE1 monitors a UE specific search space of the UE1, uses RNTI of the UE1 in the UE specific search space of the UE1 for blind detection, and obtains information bits directly indicating a target UE in an uplink authorization message;

for example, in this method, the base station sends uplink grant messages #1, #2a, #3 and #4a in the UE specific search space of UE1, which are scrambled by using the RNTI of UE1, and are sequentially used to instruct UE1 to perform uplink forwarding for UE2, uplink data transmission for UE2, uplink forwarding for UE3, and uplink data transmission for UE 3; the uplink grant message #2 is sent in a UE specific search space of the UE2, and is scrambled by using an RNTI of the UE2, and is used for indicating scheduling information of uplink data transmission of the UE 2; an uplink grant message #4 is transmitted in the UE-specific search space of UE3, scrambled with the RNTI of UE3, for indicating scheduling information of uplink data transmission of UE 3.

The UE1 uses RNTI of the UE1 to successfully perform blind detection in a UE specific search space of the UE1, decodes the RNTI to obtain four uplink grant messages #1, #2A, #3, #4A, and determines that the four uplink grant messages are sequentially used for scheduling the UE1, the UE2, the UE1 and the UE3 according to information bits of a target UE indicated directly in the uplink grant messages; according to the receiving time sequence, determining that four uplink authorization messages are sequentially used for indicating the scheduling information of the uplink data of the UE1 for transmitting the uplink data of the UE2, the scheduling information of the uplink data of the UE1 for transmitting the uplink data of the UE3 and the scheduling information of the uplink data of the UE 3.

Additionally, for UE1 to obtain the uplink scheduling message, a mix of three methods is used, for example, UE1 listens to the UE-specific search space of UE1 and uses UE1, UE2 and UE3 respectively correspond to the RNTI blind test, and UE1 listens to the UE-specific search space of UE2 and uses the RNTI blind test of UE2. The UE1 uses RNTI of the UE2 to successfully perform blind detection in a UE specific search space of the UE2, decodes to obtain an information bit which directly indicates a target UE in an uplink authorization message as a mapping relation configuration index and takes a value of 0, and the UE1 considers that the uplink authorization message is used for indicating the UE1 to forward scheduling information of uplink data of remote UE to a base station according to the mapping index value, and considers that the forwarded remote UE is the UE2 according to the search space; the UE1 uses RNTI of the UE2 to successfully perform blind detection in a UE specific search space of the UE1, decodes to obtain an uplink authorization message, and the UE1 considers the uplink authorization message to be used for indicating the UE1 to forward the scheduling information of uplink data of the remote UE to the base station according to the search space, and considers the forwarded remote UE to be the UE2 according to the RNTI.

By the above method, UE1 performs relay forwarding of uplink data for UE2, and obtains two uplink grant messages (e.g. uplink grant messages #2a and #1 or #2 and #1 in fig. 7) sent by the base station through search space monitoring and RNTI blind detection, so as to respectively indicate uplink transmission scheduling information of UE2 and uplink transmission scheduling information of UE1 forwarding UE2 data;

or, UE1 obtains an uplink grant message (for example, uplink grant message #2 in fig. 8) sent by the base station, indicates uplink transmission scheduling information of UE2, and derives and calculates uplink transmission scheduling information of UE1 for forwarding UE2 data according to the uplink transmission scheduling information of UE2 according to a preset mapping relationship, for example, a first available subframe calculated from a fourth subframe after the end of uplink transmission of UE2 at the beginning of a resource location time domain forwarded by UE1, where a frequency domain location uses a carrier preconfigured by the base station, and uses a repetition number preconfigured by the base station; or, similarly, UE1 obtains an uplink grant message sent by the base station, and instructs UE1 to forward uplink transmission scheduling information of UE2 data, and UE1 derives and calculates uplink transmission scheduling information of UE2 according to a preset mapping relation and forwarding scheduling information;

or, the UE1 obtains an uplink grant message sent by the base station, and indicates uplink transmission scheduling information of the UE2, and also indicates uplink transmission scheduling information of the UE1 for forwarding the UE2 data, where the first N1 bits in the uplink grant message are used for indicating the uplink transmission scheduling information of the UE2, and include an index indicating a UE ID of the UE2 or an RNTI of the UE2 or a mapping relationship between the UE1 and the UE2, and the last N2 bits are used for indicating uplink transmission scheduling information of the UE1 for forwarding the UE2 data;

Or, the UE1 obtains two uplink grant messages sent by the base station, wherein one or two uplink grant messages contain incomplete scheduling information, and derives and calculates scheduling information of a part not provided by the base station according to the obtained scheduling information and a preset configuration parameter, for example, the UE1 obtains an uplink grant message #2 sent by the base station and used for scheduling uplink transmission of the UE2, including a resource position of uplink transmission of the UE2, and obtains an uplink grant message #1 sent by the base station and used for relay forwarding of the UE2 and including a resource position and repetition times of uplink transmission of the UE 1; and the UE1 determines the repetition number of the uplink transmission of the UE2 according to the preset relay link configuration parameters.

UE2 and UE3 are used as remote UE, keep the behavior without relay, namely UE2/UE3 monitors the specific search space of own UE and uses the blind detection of own RNTI, the blind detection successfully decodes and obtains the uplink authorization message, and data transmission is carried out on the uplink shared channel according to the scheduling content of the message.

The UE2 and the UE3 acquire scheduling information of own uplink data transmission, and transmit uplink data according to the content of the scheduling information.

UE1 obtains uplink scheduling information of UE2 and UE3, and receives uplink transmission of UE2/UE3 according to the content of the uplink scheduling information and successfully decodes. The uplink transmission resource positions of the UE2 and the UE3 are in an uplink subframe or an uplink frequency band, and the UE1 performs downlink reception in the uplink subframe or the uplink frequency band.

The UE1 obtains the uplink forwarding scheduling information of the UE1, wherein the uplink forwarding scheduling information comprises the scheduling information forwarded for the UE2 and the scheduling information forwarded for the UE3, and the UE1 forwards the uplink data successfully decoded and received by the UE2 and the UE3 according to the content of the scheduling information.

In this scenario, for downlink data transmission, UE2 and UE3 serve as remote UEs, and keep the behavior without relay, that is, UE2 and/or UE3 monitor their own UE specific search space and use their own RNTI for blind detection, and the blind detection successfully decodes to obtain a downlink grant message, and receives data transmission of the base station on the downlink shared channel according to the scheduling content of the message.

The UE1 serves as a relay UE, and after the blind detection successfully decodes the downlink grant message of the UE2 and/or the UE3, no other operation is performed.

The base station keeps the behavior without relay, i.e. schedules the downlink data reception of UE2 and/or UE3, and does not send additional information related to the downlink scheduling to UE 1.

Example two

The embodiment describes the operation behaviors of the remote node, the relay node and the base station in the scenario that the relay node performs relay forwarding of uplink data and relay forwarding of downlink data and does not perform relay forwarding of downlink control messages.

(one) for uplink data channels and/or uplink shared channels:

The specific operation performed by the remote node and the relay node is the same as that in the first embodiment, and will not be described here again.

(II) for downlink data/downlink shared channel:

the operational behavior of the remote node includes:

similarly to the uplink relay, the remote node obtains downlink received scheduling information from the base station according to the behavior without the relay, and receives downlink data messages sent by the base station according to the content of the downlink scheduling information.

The operation behavior of the relay node includes:

1. the relay node obtains the configuration information of the relay node and the configuration information of the remote node from the base station, and the specific content is the same as that in the first embodiment. And will not be described in detail herein.

2. The specific method of the relay node obtaining the scheduling information received by the downlink of the remote node from the base station is the same as that in the first embodiment, but decoding to obtain the downlink grant message of the remote node sent by the base station.

3. The specific method of the relay node obtaining the scheduling information of the downlink relay forwarding behavior of the relay node is the same as that in the first embodiment, but the downlink grant message of the relay node sent by the base station is obtained by decoding.

Similarly, the node that the downlink grant message carries the information field and is used for explicitly indicating the node scheduled by the downlink grant message may be an identity identifier (such as a UE ID) of a remote node, or an RNTI of the remote node, or an index indicating a mapping relationship between the relay node and the remote node, which is used for determining a scheduling object of the downlink grant message.

4. The relay node receives a downlink data message sent to the relay node by the base station, and the method comprises the following steps:

and the relay node receives the downlink data channel sent by the base station at the scheduled resource position according to the content of the obtained downlink data channel scheduling information of the relay node and successfully decodes the downlink data channel.

5. The relay node forwards a downlink data message sent by the base station to the remote node, and the method comprises the following steps:

and the relay node forwards the downlink data channel sent by the base station to the remote node on the scheduled carrier according to the obtained content of the scheduling information of the downlink data channel received by the remote node.

The scheduled resource location may be a downlink carrier or a downlink subframe, and the relay node needs to have a capability of transmitting on the downlink carrier or the downlink subframe.

The behavior of the base station includes:

1. the base station performs channel configuration on the remote node and the relay node, and the specific content is the same as that in the first embodiment. And will not be described in detail herein.

2. The specific method of the base station scheduling the downlink reception of the remote node (i.e. the downlink data forwarding of the relay node) is the same as that in the first embodiment, but the base station sends the downlink grant message of the remote node.

3. The specific method of the base station scheduling the downlink reception of the relay node is the same as that in the first embodiment, but the base station sends the downlink grant message of the relay node.

4. The specific method of the base station scheduling transmission between the relay node and the remote node is the same as that in the first embodiment, but the base station sends a downlink grant message of the relay node and/or the remote node.

5. The base station sends a downlink data message to the relay node, including:

and the base station sends a downlink data channel to the relay node at the scheduled resource position according to the content of the scheduling information received by the downlink of the relay node.

It should be noted that the above operational steps are not arranged in a time sequence. The actual time sequence of each operation behavior step is determined according to the scheduling content of the base station and the downlink control channel configuration information content of the relay node and the remote node.

In the scenario aimed at by the second embodiment, the relay node performs uplink data forwarding and downlink data forwarding, where the uplink data forwarding method is the same as that in the first embodiment, and the downlink data forwarding method is similar to that in the first embodiment, but the used scheduling information is downlink scheduling information, and the downlink grant message in the downlink control channel is obtained through decoding.

The following describes specific actions of the downlink data relay forwarding with reference to specific examples. The downlink data channel PDSCH in this example may also be EPDSCH, MPDSCH, NPDSCH.

In this example, as shown in fig. 9, UE1 is a relay node with relay capability in the cell coverage, and UE2 and UE3 are remote nodes in the cell coverage. Both UE2 and UE3 use UE1 to relay downlink data channel PDSCH, and both receive downlink control channel PDCCH directly from the base station.

Similar to the first embodiment, UE1 normally accesses to the cell, acquires its RNTI and various configuration information from the base station, and is configured by the base station to relay and forward downlink data reception of UE2 and UE3, and acquires configuration information of UE2 and UE3 from the base station through RRC signaling, where the content is the same as in the first embodiment.

The UE2 and the UE3 have the capability of accessing to the cell in the coverage area of the cell, and the UE2 and the UE3 normally access to the cell and acquire the RNTI and each item of configuration information of the UE from the base station. UE2 and UE3 are configured by the base station to relay the downlink data reception by UE1, and the configuration is transparent, that is, UE2 and UE3 do not need to know that the downlink data reception is completed through relay, and downlink data reception is performed according to the original design of the unrepeatered system.

And the UE1, the UE2 and the UE3 monitor in a configured search space in a downlink control channel configured by the base station and perform blind detection by using the RNTI to obtain a downlink received scheduling message.

The specific way that the base station sends the downlink scheduling message and the UE1, and the UE2 and the UE3 obtain the downlink received scheduling message is the same as the behavior in the first embodiment, but the received scheduling message obtained by obtaining the UE1/2/3 downlink shared channel is carried in the downlink grant message.

The UE1 obtains the scheduling information which is received by the UE1 from the base station in the downlink and comprises the scheduling information of the downlink data which needs to be forwarded to the UE2 and the scheduling information of the downlink data which needs to be forwarded to the UE3, and the UE1 receives the downlink data which needs to be forwarded to the UE2/UE3 and is sent by the base station according to the content of the scheduling information and decodes successfully.

The UE1 obtains the scheduling information of the UE2 and the UE3 for downlink reception, and the UE1 forwards the downlink data which is transmitted by the base station and needs to be forwarded to the UE2/UE3 at the corresponding resource position according to the content of the scheduling information. The downlink receiving resource positions of the UE2 and the UE3 are in a downlink subframe or a downlink frequency band, and the UE1 transmits in the downlink subframe or the downlink frequency band. The UE2 and the UE3 acquire the scheduling information of the downlink data reception of the UE and receive the downlink data according to the content of the scheduling information.

Example III

In the third embodiment, the operation behaviors corresponding to the remote node, the relay node and the base station in the scenario that the relay node performs relay forwarding of uplink data, downlink data and downlink control messages are described.

From the system perspective, the third embodiment and the first embodiment and the second embodiment are different in that the relay node additionally relays and forwards the downlink control message sent by the base station to the remote node, the remote node obtains the uplink scheduling information and the downlink scheduling information from the relay node instead of the base station, and the base station does not send the downlink control message to the remote node directly, but sends the downlink control message to the relay node.

From the perspective of the remote node, all relay forwarding operations in the third embodiment are transparent, that is, the remote node does not need to know that the transmission (reception) of the uplink and downlink data and the downlink control message is completed through relay forwarding, and the transmission (reception) of the uplink and downlink data and the downlink control message is performed according to the original design of the unrepeatered system. Thus, the behavior of the remote node is the same as in embodiment one and/or embodiment two. And will not be described in detail herein.

From the perspective of the relay node:

(one) for uplink and downlink data channels/shared channels:

The method for the relay node in the first embodiment and the second embodiment to obtain the scheduling information of uplink data transmission and downlink data reception of the remote node and the relay node from the base station can still be used in the third embodiment. After the scheduling information of the remote node and the relay node is obtained, the method of uplink and downlink transmission (forwarding)/reception by the relay node according to the content of the scheduling information is the same as that in the first/second embodiment. And will not be described in detail herein.

(II) for the downlink control channel:

and the relay node receives and decodes the downlink control message of the remote node and forwards the downlink control message successfully decoded to the remote node.

The relay node acts include:

1. the relay node obtains configuration information of the relay node and the remote node from the base station as described in embodiment one and embodiment two. And will not be described in detail herein.

2. The method that the relay node receives the downlink control message of the remote node in the first and second multiplexing embodiments includes that the relay node obtains the scheduling information of the remote node from the base station, but all types of control messages of the remote node successfully decoded in the third embodiment are included in the control information range of the remote node, and are not limited to the uplink grant message and/or the downlink grant message of the remote node. For example, the relay node receives and successfully decodes transmit power control (Transmitter Power Control, TPC) commands sent by the base station to the remote node and forwards the TPC commands to the remote node in a next step.

3. The relay node forwards the successfully received downlink control message of the remote node to the remote node, and the method comprises the following steps:

the relay node receives the downlink control message of the remote node and decodes the downlink control message successfully; the relay node determines the position of the specific search space of the downlink control channel UE of the earliest remote node after decoding is successful according to the configuration information of the remote node; the relay node forwards the downlink control message to the remote node in the downlink control channel UE specific search space.

From the base station's point of view:

(one) for both uplink and downlink data/shared channels:

the methods of the base station in the first embodiment and the second embodiment for uplink data reception and downlink data transmission to the remote node and/or the relay node can still be used in the third embodiment.

(II) for the downlink control channel:

the method of the base station in the first embodiment and the second embodiment for transmitting the scheduling information of the relay node-to-base station communication and the scheduling information of the relay node-to-remote node to the relay node can be used in the third embodiment. The method can be similarly used for sending other downlink control messages of the remote node by the base station, and further the step of sending the downlink control message of the remote node to the relay node by the base station, besides sending the downlink control message to the relay node, the base station does not additionally send the downlink control message to the remote node.

Further, the base station determines the position of the specific search space of the downlink control channel UE of the earliest remote node after the relay node decodes the downlink control message of the remote node to be forwarded according to the data channels and the control channel configuration information of the relay node and the remote node, correspondingly determines the content of the base station for carrying out resource scheduling for the remote node and/or the relay node in the control message according to the position, and correspondingly adjusts the timing of the sending behavior and/or the timing of the receiving behavior of the base station.

Next, a relay forwarding method of the downlink control message is described with reference to a specific example based on the scenario of the third embodiment. The uplink shared channel PDCCH in this example may also be EPDCCH, MPDCCH, NPDCCH.

In this example, as shown in fig. 10, UE1 is a relay node with relay capability in the cell coverage, and UE2 and UE3 are remote nodes in the cell coverage. Both UE2 and UE3 use UE1 for forwarding uplink data channel PUSCH, downlink control channel PDCCH, and downlink data channel PDSCH.

Similar to the first and second embodiments, UE1 accesses the cell normally, acquires its RNTI and configuration information from the base station, and is configured by the base station to relay the downlink control channels of UE2 and UE3, and acquires configuration information of UE2 and UE3 from the base station through RRC signaling, where the content is the same as in the first and second embodiments. And will not be described in detail herein.

The UE2 and the UE3 have the capability of accessing to the cell in the coverage area of the cell, and the UE2 and the UE3 normally access to the cell and acquire the RNTI and each item of configuration information of the UE from the base station. The base station configures the UE2 and the UE3 to perform relay forwarding of the downlink control channel through the UE1, and the configuration is transparent, and the UE2 and the UE3 do not need to know that the downlink control message reception is completed through relay forwarding, and perform the downlink control message reception according to the original design of the relay-free system.

The specific manner of obtaining the downlink control message by the UE1 is the same as the above manner of obtaining the downlink received scheduling message in the first embodiment and the second embodiment. As shown in fig. 5 or 6, UE1 decodes to obtain a downlink control message #1 and a downlink control message #3 of UE1, a downlink control message #2 of UE2, and a downlink control message #4 of UE 3. It should be noted that, the methods in the first and second embodiments also support that UE1 decodes the downlink control message of UE2 in the UE specific search space of UE2, and the downlink control message sent by the base station may be decoded by UE2 through blind detection of the UE specific search space, or may not be directly decoded by UE2 due to reasons such as link quality, and all the processes of relaying and forwarding the downlink control message by UE1 are not affected.

The UE1 relays the downlink control message #2 and the downlink control message # 4. The UE1 determines, according to the control channel configuration message of the UE2 and/or the control channel configuration message of the UE3, the position of the UE2 downlink control channel UE specific search space and/or the position of the UE3 downlink control channel UE specific search space that are earliest after decoding is successful, where the position may be in the same period as the UE1 downlink control channel UE specific search space or in a different period, as shown in fig. 11 and fig. 12. The UE1 determines the position and physical layer parameters of downlink control message candidates in the position of a specific search space of a downlink control channel UE of the UE2 and/or the UE3 according to the control channel configuration message of the UE2 and/or the control channel configuration message of the UE 3; accordingly, the downlink control message of UE2 and/or UE3 is forwarded in the candidate location in the UE2 and/or UE3 UE-specific search space, as shown in fig. 13. When the base station schedules the resource positions of data transmission/reception for UE1 and UE2/3, determining the UE specific search space positions of UE1 and UE2 and/or UE3 according to the downlink control channel configuration information of UE1 and UE2 and/or UE3, calculating the UE specific search space position of the earliest UE2 and/or UE3 after the UE1 decodes the downlink control message to be forwarded, and determining the earliest starting position of resource scheduling according to the position, for example, when the UE1 forwards the grant message of uplink or downlink data for UE2 and/or UE3, the resource position of scheduling for uplink/downlink data transmission by the base station is not earlier than the n subframes after the UE1 finishes the end position of the UE specific search space of the earliest UE2 and/or UE3 after the decoding, as shown in fig. 14.

UE2 and UE3 are used as remote UE, keep the behavior without relay, namely UE2 and/or UE3 monitor own UE specific search space and use own RNTI to carry out blind detection, and the blind detection is successfully decoded to obtain downlink control information.

Example IV

In the first, second and third embodiments, the relay node does not change the message content or information bits of the forwarded uplink data and/or downlink data and downlink control message, and performs or does not change transmission parameters such as repetition frequency, modulation and Coding Scheme (MCS), for example, when the transmission parameters configured by the base station for the remote node are different from the forwarding transmission parameters configured for the relay node, forwarding is performed according to the transmission parameters configured by the base station.

Further, when the relay node forwards, the relay node changes the content or information bit of the forwarded message.

For example, when the relay node forwards the downlink control message for the remote node, the repetition number and the modulation and coding scheme in the downlink control message sent by the base station to the remote node are modified according to the link quality from the relay node to the remote node.

For another example, in a scenario that the relay node forwards a downlink control message of data transmission for a remote node, for a resource location of uplink and downlink data transmission (receiving) of the remote node, an indication (which may be a subframe number) is indicated in a form of a time domain offset (offset) between a data transmission resource and a control message transmission resource in the downlink control message for scheduling, and in an uplink grant message and/or a downlink grant message to be forwarded, which are sent by the base station to the relay node, the indicated offset is an offset between the uplink grant message and/or the downlink grant message and the data resource of the remote node; when the relay node forwards the control message to the remote node, the value of the offset indicated in the control message forwarded by the relay node is correspondingly adjusted according to the time domain position of the transmission resource of the actual control message of the relay node and the data resource position of the remote node calculated by the relay node. As shown in fig. 15, which is an example of uplink data forwarding, in an uplink grant message #2a sent by a base station to a relay node and used for indicating a remote node data resource location, the indicated offset is t1; in the uplink grant message #2 forwarded by the relay node to the remote node, the message field is modified, and the indicated offset is t2.

In addition, the first embodiment, the second embodiment, and the third embodiment describe a transparent relay forwarding method, where the remote node does not know whether the transmission and/or the reception of the data and/or the control channel is completed through the relay node. Additionally, the system may also use a relay forwarding method that is not transparent, i.e. the remote node knows that its transmission and/or reception of data and/or control channels is done via relay forwarding, further the remote node does not know the identity of the relay node, or knows that the relay node is a specific UE.

For the non-transparent transmission condition, the remote node acquires the configuration information of the remote node from the relay node through RRC signaling; further, the remote node acquires configuration information of the relay node from the base station through RRC signaling. The configuration information of the remote node and/or the configuration information of the relay node comprises: UE ID, RNTI, downlink control channel configuration information, and data channel configuration information.

By the design, the remote node outside the cell coverage area can acquire the configuration information of the remote node, so that the remote node can realize communication with the base station through the forwarding of the relay node, and the scene range supported by the design comprises the remote nodes inside the cell coverage area and outside the cell coverage area.

Further, the remote node obtains configuration information of the relay node from the base station through the RRC signaling, the remote node performs blind detection by using the RNTI of the relay node in the specific search space of the self UE, the blind detection is successful and decodes to obtain a downlink control message, an indication object of the downlink control message is determined according to the search space used by the downlink control message and/or the blind detection RNTI and/or a carried target UE information bit, and other operations are performed according to the content in the downlink control message, for example, the remote node obtains uplink data scheduling information of the remote node and uplink forwarding scheduling information of the relay node, and uplink transmission is performed in a cooperative mode between the forwarding resource position of the relay node and the relay node, so that transmission power is enhanced.

The embodiment of the invention provides a first UE, as shown in fig. 16, including: a first receiving module 1601, a forwarding module 1602, wherein,

a first receiving module 1601, configured to receive configuration information sent by a base station.

The first receiving module 1601 is further configured to receive information of the second UE according to the configuration information;

a forwarding module 1602, configured to forward the information of the second UE received by the first receiving module 1601.

Wherein the configuration information includes at least one of:

Specifically, the first receiving module 1601 is specifically configured to obtain downlink control channel configuration information of the second UE and/or downlink control channel configuration information of the first UE according to the configuration information, monitor a downlink control channel of the second UE and/or a downlink control channel of the first UE according to the obtained downlink control channel configuration information of the second UE and/or the downlink control channel configuration information of the first UE, and decode to obtain first scheduling information, where the first scheduling information is used to indicate reception of a data channel of the second UE.

The first receiving module 1601 is specifically further configured to receive data information of the second UE according to the first scheduling information.

Specifically, the first receiving module 1601 is further specifically configured to receive uplink data information of the second UE on an uplink data channel of the second UE according to the first scheduling information.

The first receiving module 1601 is specifically further configured to receive downlink data information of the second UE on a downlink data channel of the second UE or a downlink data channel of the first UE according to the first scheduling information.

The uplink data information of the second UE is sent by the second UE according to the control information directly received from the base station, or the uplink data information of the second UE is sent by the second UE according to the control information forwarded by the first UE.

Specifically, the forwarding module 1602 is specifically configured to receive second scheduling information sent by the base station.

The second scheduling information is used for the first UE to forward the data information of the second UE.

The forwarding module 1602 is specifically further configured to forward the received data information of the second UE according to the second scheduling information.

Wherein the data information of the second UE is received at the second UE according to the control information received directly from the base station, or the data information of the second UE is received at the second UE according to the control information forwarded by the first UE.

Specifically, the first receiving module 1601 is further specifically configured to monitor a downlink control channel of the second UE and/or a downlink control channel of the first UE, and decode to obtain the second scheduling information.

Specifically, the forwarding module 1602 is further specifically configured to add a medium access control MAC frame header or a radio link control RLC frame header before the received data information of the second UE.

The forwarding module 1602 is specifically further configured to forward data information of the second UE after adding the frame header.

Specifically, the first receiving module 1601 is further specifically configured to obtain downlink control channel configuration information of the second UE and/or downlink control channel configuration information of the first UE according to the configuration information.

The first receiving module 1601 is specifically further configured to monitor, according to the obtained downlink control channel configuration information of the second UE and/or the downlink control channel configuration information of the first UE, the downlink control channel of the first UE and/or the downlink control channel of the second UE, and decode to obtain the downlink control information of the second UE.

The forwarding module 1602 is specifically further configured to forward, on a downlink control channel of the second UE, downlink control information of the second UE to the second UE.

Further, the apparatus further comprises: a decision block 1603 (not labeled in the figure).

A judging module 1603, configured to judge whether the control information decoded according to the configuration information is used for scheduling the first UE and/or the second UE according to at least one of the following information: information bits carried in the control message, a scrambled RNTI of the control message, and a search space for decoding the control message.

Compared with the prior art, the embodiment of the invention receives the configuration information sent by the base station, wherein the configuration information is used for receiving the information of the second UE, then receives the information of the second UE according to the configuration information, and then forwards the received information of the second UE, so that relay transmission can be performed between the base station and a remote node (second UE) through a relay node (first UE).

An embodiment of the present invention provides a base station, as shown in fig. 17, including: a transmitting module 1701, a second receiving module 1702, wherein,

a sending module 1701, configured to send configuration information to the first UE.

The sending module 1701 is further configured to send, according to the configuration information, information of the second UE to the second UE through the first UE.

The second receiving module 1702 is configured to receive, according to the configuration information, information of a second UE forwarded by the first UE.

Wherein the configuration information includes at least one of:

The sending module 1701 is specifically configured to send, according to the configuration information, control information and data information of the second UE to the second UE through the first UE.

The sending module 1701 is specifically further configured to send control information to the second UE according to the configuration information, and send data information of the second UE to the second UE through the first UE.

The second receiving module 1702 is specifically configured to send, according to the configuration information, control information of the second UE to the second UE through the first UE, and receive data information of the second UE forwarded by the first UE.

The second receiving module 1702 is specifically further configured to send control information to the second UE according to the configuration information, and receive data information of the second UE forwarded by the first UE.

The sending module 1701 is specifically further configured to send, according to the configuration information, the second scheduling information and the first scheduling information to the first UE on a downlink control channel of the second UE and/or a downlink control channel of the first UE.

The first scheduling information is used for the first UE to receive the data information of the second UE, and the second scheduling information is used for the first UE to forward the data information of the second UE.

The sending module 1701 is specifically further configured to send, by the first UE, data information of the second UE to the second UE based on the second scheduling information and the first scheduling information.

The sending module 1701 is specifically further configured to send, according to the configuration information, control information of the second UE to the second UE through the first UE on a downlink control channel of the first UE and/or a downlink control channel of the first UE.

The second receiving module 1702 is specifically further configured to send, according to the configuration information, the second scheduling information and the first scheduling information to the first UE on a downlink control channel of the second UE and/or a downlink control channel of the first UE.

The first scheduling information is used for indicating the receiving of the data channel of the second UE, and the second scheduling information is used for forwarding the data information of the second UE by the first UE.

The second receiving module 1702 is specifically further configured to receive data information of the second UE forwarded by the first UE based on the second scheduling information and the first scheduling information.

Still another embodiment of the present invention provides a first UE, including: a processor; and a memory configured to store machine-readable instructions that, when executed by the processor, cause the processor to perform the method of relaying transmissions described above.

Still another embodiment of the present invention provides a base station, including: a processor; and a memory configured to store machine-readable instructions that, when executed by the processor, cause the processor to perform the method of relaying transmissions described above.

Fig. 18 schematically illustrates a block diagram of a computing system that may be used to implement a base station or user equipment of the present disclosure, according to an embodiment of the present invention.

As shown in fig. 18, the computing system 1800 includes a processor 1810, a computer readable storage medium 1820, an output interface 1830, and an input interface 1840. The computing system 1800 may perform the methods described above with reference to fig. 1 or fig. 2 to configure reference signals and to perform data transmission based on the reference signals.

In particular, processor 1810 can include, for example, a general purpose microprocessor, an instruction set processor and/or an associated chipset and/or a special purpose microprocessor (e.g., an Application Specific Integrated Circuit (ASIC)), or the like. The processor 1810 may also include on-board memory for caching purposes. The processor 1810 may be a single processing unit or multiple processing units for performing different actions of the method flows described with reference to fig. 1 or 2.

The computer-readable storage medium 1820 may be any medium that can contain, store, communicate, propagate, or transport the instructions, for example. For example, a readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, device, or propagation medium. Specific examples of the readable storage medium include: magnetic storage devices such as magnetic tape or hard disk (HDD); optical storage devices such as compact discs (CD-ROMs); a memory, such as a Random Access Memory (RAM) or a flash memory; and/or a wired/wireless communication link.

The computer-readable storage medium 1820 may include a computer program that may include code/computer-executable instructions that, when executed by the processor 1810, cause the processor 1810 to perform the method flow as described above in connection with fig. 1 or 2, and any variations thereof.

The computer program may be configured with computer program code comprising, for example, computer program modules. For example, in an example embodiment, code in a computer program may include one or more program modules, including for example module 1, module 2, … …. It should be noted that the division and number of modules is not fixed, and that a person skilled in the art may use suitable program modules or combinations of program modules according to the actual situation, which when executed by the processor 1810, enable the processor 1810 to perform the method flow and any variations thereof as described above in connection with fig. 1 or 2.

The processor 1810 may use the output interface 1830 and the input interface 1840 to perform the method flows described above in connection with fig. 1 or 2 and any variations thereof, according to embodiments of the present disclosure.

Those skilled in the art will appreciate that the present invention includes apparatuses related to performing one or more of the operations described herein. These devices may be specially designed and constructed for the required purposes, or may comprise known devices in general purpose computers. These devices have computer programs stored therein that are selectively activated or reconfigured. Such a computer program may be stored in a device (e.g., a computer) readable medium or any type of medium suitable for storing electronic instructions and respectively coupled to a bus, including, but not limited to, any type of disk (including floppy disks, hard disks, optical disks, CD-ROMs, and magneto-optical disks), ROMs (Read-Only memories), RAMs (Random Access Memory, random access memories), EPROMs (Erasable Programmable Read-Only memories), EEPROMs (Electrically Erasable Programmable Read-Only memories), flash memories, magnetic cards, or optical cards. That is, a readable medium includes any medium that stores or transmits information in a form readable by a device (e.g., a computer).

It will be understood by those within the art that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. Those skilled in the art will appreciate that the computer program instructions can be implemented in a processor of a general purpose computer, special purpose computer, or other programmable data processing method, such that the blocks of the block diagrams and/or flowchart illustration are implemented by the processor of the computer or other programmable data processing method.

Those of skill in the art will appreciate that the various operations, methods, steps in the flow, acts, schemes, and alternatives discussed in the present invention may be alternated, altered, combined, or eliminated. Further, other steps, means, or steps in a process having various operations, methods, or procedures discussed herein may be alternated, altered, rearranged, disassembled, combined, or eliminated. Further, steps, measures, schemes in the prior art with various operations, methods, flows disclosed in the present invention may also be alternated, altered, rearranged, decomposed, combined, or deleted.

The foregoing is only a partial embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.

Claims

1. A method performed by a first user equipment, UE, in a communication system, comprising:

receiving configuration information from a base station;

acquiring second configuration information related to a downlink control channel of the second UE and/or first configuration information related to the downlink control channel of the first UE according to the received configuration information;

according to the first configuration information and/or the second configuration information, monitoring a downlink control channel of the second UE and/or a downlink control channel of the first UE to obtain first scheduling information and/or downlink control information of the second UE, wherein the first scheduling information is used for indicating the receiving of a data channel of the second UE;

receiving information of the second UE, wherein the information of the second UE comprises data information of the second UE and/or downlink control information of the second UE, which are received according to the first scheduling information;

and forwarding the received information of the second UE.

2. The method of claim 1, wherein the received configuration information comprises at least one of:

the method comprises the steps of identifying a second UE, carrying out Radio Network Temporary Identifier (RNTI) information of the second UE, second configuration information, first configuration information, data channel configuration information of the first UE and data channel configuration information of the second UE;

wherein the first configuration information and/or the second configuration information comprises at least one of the following: the method comprises the steps of searching space types of a downlink control channel, maximum repetition times Rmax, a starting subframe, an offset, an available subframe, a downlink control information DCI format and downlink control channel resource configuration information;

3. The method of claim 1, wherein receiving data information of a second UE according to the first scheduling information comprises at least one of:

receiving uplink data information of a second UE on an uplink data channel of the second UE according to the first scheduling information;

And receiving downlink data information of the second UE on a downlink data channel of the second UE or a downlink data channel of the first UE according to the first scheduling information.

4. The method of claim 3, wherein the step of,

5. The method of claim 1, wherein forwarding the received information of the second UE comprises:

receiving second scheduling information sent by a base station, wherein the second scheduling information is used for forwarding data information of a second UE by a first UE;

6. The method of claim 5, wherein the step of determining the position of the probe is performed,

the data information of the second UE is received at the second UE according to control information received directly from a base station, or the data information of the second UE is received at the second UE according to control information forwarded by the first UE.

7. The method of claim 5, wherein receiving the second scheduling information sent by the base station comprises:

8. The method of claim 7, wherein monitoring the downlink control channel of the second UE and/or the downlink control channel of the first UE and successfully decoding to obtain the first scheduling information and/or the second scheduling information, comprises:

monitoring a downlink control channel of the second UE and/or a downlink control channel of the first UE, acquiring scheduling information of a data channel, determining first scheduling information based on indication information in the scheduling information of the data channel, and determining second scheduling information based on any one of preset relay transmission configuration information and a preset mapping relation and the first scheduling information; and/or the number of the groups of groups,

9. The method of claim 8, wherein the step of determining the position of the first electrode is performed,

10. The method according to claim 7, wherein listening to the downlink control channel of the second UE and/or the downlink control channel of the first UE and decoding to obtain the first scheduling information and/or for the second scheduling information comprises:

first scheduling information and/or second scheduling information is determined based on the determined scheduling information being used for scheduling the first UE and/or the second UE.

11. The method according to claim 10, wherein the listening to the UE-specific search space of the first UE and/or the UE-specific search space of the second UE and performing blind detection by the RNTI of the first UE and/or the RNTI of the second UE comprises:

monitoring a UE specific search space of the first UE, and performing blind detection through the RNTI of the first UE; and/or the number of the groups of groups,

monitoring a UE specific search space of the first UE, and performing blind detection through the RNTI of the first UE and the RNTI of the second UE; and/or the number of the groups of groups,

12. The method according to claim 1, characterized in that the method further comprises:

when more than one scheduling information for forwarding the second UE data information and/or more than one scheduling information corresponding to the second UE data channel are acquired, determining a mapping relation between each scheduling information for forwarding the second UE data information and each scheduling information corresponding to the second UE data channel according to a predefined mapping rule, wherein the predefined mapping rule is a mapping rule between the scheduling information for forwarding the second UE data information and the scheduling information corresponding to the second UE data channel.

13. The method according to any of claims 1-7, wherein forwarding the received information of the second UE comprises:

14. The method of claim 1, wherein the step of determining the position of the substrate comprises,

forwarding the received information of the second UE, including:

15. The method according to claim 1, wherein the method further comprises:

judging whether control information obtained by decoding according to the received configuration information is used for scheduling the first UE and/or the second UE according to at least one of the following information:

information bits carried in the control message, a scrambled RNTI of the control message, and a search space for decoding the control message.

16. The method of claim 15, wherein the step of determining the position of the probe is performed,

the content carried in the information bits includes at least one of: the method comprises the steps of identifying an identity of a first UE, identifying a second UE, identifying an RNTI of the first UE, identifying an RNTI of the second UE, and identifying information of a mapping relationship between the first UE and the second UE.

17. The method according to claim 1, characterized in that the method further comprises:

and when the first UE forwards, the first UE changes the forwarded message content and/or information bits.

18. The method of claim 1, wherein the first UE reports to the base station at least one of:

full duplex capability.

19. A method performed by a base station in a communication system, comprising:

the base station sends configuration information to the first UE;

the base station sends the information of the second UE to the second UE through the first UE according to the sent configuration information; and/or the number of the groups of groups,

the base station receives the information of the second UE forwarded by the first UE according to the sent configuration information;

the configuration information is sent to forward information of the second UE at the first UE, the information of the second UE includes data information of the second UE and/or downlink control information of the second UE received according to first scheduling information, the first scheduling information and/or the downlink control information of the second UE are obtained by the first UE according to second configuration information related to a downlink control channel of the second UE and/or first configuration information related to a downlink control channel of the first UE, and the second configuration information and/or the first configuration information is obtained according to the sent configuration information, where the first scheduling information is used to indicate reception of the data channel of the second UE.

20. The method of claim 19, wherein the transmitted configuration information comprises at least one of:

21. The method of claim 19, wherein the base station transmits information of the second UE to the second UE through the first UE according to the transmitted configuration information, comprising any one of:

The base station transmits downlink control information and data information of the second UE to the second UE through the first UE according to the transmitted configuration information;

and the base station sends downlink control information to the second UE according to the sent configuration information, and sends the data information of the second UE to the second UE through the first UE.

22. The method of claim 19, wherein the base station receives information of the second UE forwarded by the first UE according to the transmitted configuration information, comprising any one of:

the base station sends control information of the second UE to the second UE through a first UE according to the sent configuration information, and receives data information of the second UE forwarded by the first UE;

and the base station sends control information to the second UE according to the sent configuration information and receives the data information of the second UE forwarded by the first UE.

23. The method of claim 21, wherein the base station transmitting data information of the second UE to the second UE through the first UE comprises:

the base station sends second scheduling information to the first UE on a downlink control channel of the second UE and/or a downlink control channel of the first UE according to the sent configuration information, wherein the second scheduling information is used for forwarding data information of the second UE by the first UE;

24. The method of claim 21, wherein the base station transmitting control information of the second UE to the second UE through the first UE comprises:

and the base station transmits the control information of the second UE to the second UE through the first UE on the downlink control channel of the first UE and/or the downlink control channel of the first UE according to the transmitted configuration information.

25. The method of claim 22, wherein the base station receiving the data information of the second UE forwarded by the first UE comprises:

26. The method according to claim 19, wherein the base station indicates that the scheduling information sent in the downlink control channel is used for scheduling the first UE and/or for scheduling the second UE by at least one of:

transmitting a downlink control message on the search space of the first UE and/or the search space of the second UE according to the first configuration information or the second configuration information in the configuration information;

generating information bits in Downlink Control Information (DCI) carried by a downlink control channel according to a predefined rule, wherein the content carried in the information bits comprises at least one of the following: the identity of the first UE, the identity of the second UE, the RNTI of the first UE, the RNTI of the second UE, and the identity information of the mapping relationship between the first UE and the second UE.

27. The method according to claim 19, wherein the base station receives information of the second UE forwarded by the first UE and/or information transmitted by the second UE according to the transmitted configuration information, comprising:

the base station sends a downlink control message to the first UE on a downlink control channel of the second UE and/or a downlink control channel of the first UE according to the sent configuration information, wherein the downlink control message is used for indicating scheduling information of the second UE sending information; and/or the number of the groups of groups,

The base station sends a downlink control message to the second UE on a downlink control channel of the second UE according to the sent configuration information, wherein the downlink control message is used for indicating scheduling information of the second UE sending information; and/or the number of the groups of groups,

28. The method of claim 19, further comprising:

the base station scrambles an uplink authorization message corresponding to uplink data of the second UE and/or a downlink authorization message corresponding to downlink data of the second UE through a Radio Network Temporary Identifier (RNTI) of the second UE and/or an RNTI of the first UE; the method comprises the steps of,

and the base station sends uplink authorization information corresponding to the uplink data of the second UE and/or downlink authorization information corresponding to the downlink data of the second UE after scrambling in the downlink control channel of the corresponding second UE and/or the downlink control channel of the first UE according to the downlink control channel configuration information, wherein the uplink authorization information carries scheduling information corresponding to the uplink data of the second UE, and the downlink authorization information carries scheduling information corresponding to the downlink data of the second UE.

29. The method of claim 19, further comprising:

according to the first configuration information, sending an uplink authorization message of uplink data which the first UE needs to forward and/or a downlink authorization message of downlink data which the first UE needs to forward in a downlink control channel of the first UE; and/or the number of the groups of groups,

according to the second configuration information, sending an uplink authorization message of uplink data to be forwarded by the first UE and/or a downlink authorization message of downlink data to be forwarded by the first UE in a downlink control channel of the second UE;

the uplink grant message carries scheduling information of the first UE for forwarding uplink data, and the downlink grant message carries scheduling information of the first UE for forwarding downlink data.

30. The method of claim 19, wherein the base station causes the first UE to obtain scheduling information for transmissions between the first UE and the second UE by at least one of:

31. The method according to claim 29 or 30, wherein,

the grant message is scrambled by the base station through the RNTI of the first UE or the RNTI of the second UE.

32. The method according to claim 19, wherein uplink reception by scheduling the first UE and/or scheduling the second UE and based on configuration information of data information and/or configuration information of control information comprises:

and receiving uplink data sent by the first UE on an uplink data channel at the scheduled resource position according to the uplink forwarding scheduling information of the first UE.

33. The method according to claim 19, wherein the downlink transmission by scheduling the first UE and/or scheduling the second UE and based on configuration information of the data information and/or configuration information of the control information comprises:

34. A terminal device, comprising:

a transceiver; and

a processor coupled with the transceiver and configured to perform the method of any of claims 1-18.

35. A base station, comprising:

a transceiver; and

a processor coupled with the transceiver and configured to perform the method of any of claims 19-33.

36. A computer readable storage medium, characterized in that a computer program is stored for implementing the method according to any one of claims 1-18 when being executed by a processor.

37. A computer readable storage medium, characterized in that a computer program is stored for implementing the method according to any of claims 19-33 when being executed by a processor.