Random access method, device, first communication node and second communication node

Abstract

The present application proposes a random access method, device, first communication node and second communication node. The method is applied to the first communication node and includes: sending first timing advance information and corresponding first preamble code information to the second communication node.

Description

Technical Field

[0001] The present application relates to the field of communications, and in particular to a random access method, device, a first communication node, and a second communication node. Background Art

[0002] With the development of smart terminals and the enrichment of wireless data application services, the number of data users in wireless communication networks has increased significantly. Wireless data content is no longer limited to traditional text or images, and there are more and more multimedia service content such as high-definition video and mobile TV, which has led to explosive growth in wireless communication network traffic. Mobile Internet and Internet of Things services will become the main driving force for the development of mobile communications.

[0003] For the Internet of Things, the third Generation Partnership Project (3GPP) standard organization has developed two very representative communication standard protocols: Machine Type Communication (MTC) and Narrow Band Internet of Things (NB-IoT). For the mobile Internet, the 3GPP standard organization has recently developed the fifth generation (5G) new radio (NR) communication standard protocol.

[0004] At present, for IoT terminals with poor signal quality, it is necessary to increase the signal transmission power or increase the number of repeated signal transmissions to ensure that the transmitted signal can be successfully received. However, these technologies will lead to increased terminal power consumption and increased system resource overhead. The above problems also exist for the random access process. Summary of the invention

[0005] The present application provides a random access method, an apparatus, a first communication node and a second communication node.

[0006] In a first aspect, an embodiment of the present application provides a random access method, applied to a first communication node, including:

[0007] Send first timing advance information and corresponding first preamble code information to the second communication node.

[0008] In a second aspect, an embodiment of the present application provides a random access method, applied to a second communication node, including:

[0009] Receiving first timing advance information and corresponding first preamble information sent by a first communication node;

[0010] Random access of a third communication node is completed based on the first timing advance and the first preamble code information.

[0011] In a third aspect, an embodiment of the present application provides a random access method, applied to a first communication node, including:

[0012] When message 3 is detected, the message 3 is sent to the second communication node via an uplink channel, wherein scheduling information of the uplink channel is carried in message 2 or sent via a downlink channel.

[0013] In a fourth aspect, an embodiment of the present application provides a random access method, applied to a second communication node, including:

[0014] Receive message 3 sent by the first communication node;

[0015] Based on the message 3, random access of the third communication node is completed.

[0016] In a fifth aspect, an embodiment of the present application provides a random access device, which is configured at a first communication node, and includes: a sending module, configured to send first timing advance information and corresponding first preamble code information to a second communication node.

[0017] In a sixth aspect, an embodiment of the present application provides a random access device, configured at a second communication node, including:

[0018] A receiving module, configured to receive first timing advance information and corresponding first preamble information sent by a first communication node;

[0019] An access module is configured to complete random access of a third communication node based on the first timing advance and the first preamble code information.

[0020] In a seventh aspect, an embodiment of the present application provides a random access device, configured at a first communication node, including:

[0021] The sending module is configured to send the message 3 to the second communication node through an uplink channel when the message 3 is detected, wherein the scheduling information of the uplink channel is carried in the message 2 or sent through a downlink channel.

[0022] In an eighth aspect, an embodiment of the present application provides a random access device, configured at a second communication node, including:

[0023] A receiving module, configured to receive a message 3 sent by a first communication node;

[0024] The access module is configured to complete random access of the third communication node based on the message 3.

[0025] In a ninth aspect, an embodiment of the present application provides a first communication node, including:

[0026] one or more processors;

[0027] A storage device for storing one or more programs;

[0028] When the one or more programs are executed by the one or more processors, the one or more processors implement the method as described in the first aspect or the method as described in the third aspect.

[0029] In a tenth aspect, an embodiment of the present application provides a second communication node, including:

[0030] one or more processors;

[0031] A storage device for storing one or more programs;

[0032] When the one or more programs are executed by the one or more processors, the one or more processors implement the method as described in the second aspect or the method as described in the fourth aspect.

[0033] In the eleventh aspect, an embodiment of the present application provides a storage medium, wherein the storage medium stores a computer program, and when the computer program is executed by a processor, any one of the methods in the embodiments of the present application is implemented.

[0034] With regard to the above embodiments and other aspects of the present application and their implementation, further description is provided in the accompanying drawings, detailed description and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of a random access method provided in an embodiment of the present application;

[0036] Figure 2 A schematic diagram of a random access process for Msg3 transmission provided in an embodiment of the present application;

[0037] Figure 3 A schematic diagram of a random access process for Msg3 retransmission provided in an embodiment of the present application;

[0038] Figure 4 A schematic diagram of a flow chart of another random access method provided in an embodiment of the present application;

[0039] Figure 5 A schematic diagram of a flow chart of another random access method provided in an embodiment of the present application;

[0040] Figure 6 A schematic diagram of a flow chart of another random access method provided in an embodiment of the present application;

[0041] Figure 7 A schematic diagram of a flow chart of another random access method provided in an embodiment of the present application;

[0042] Figure 8 A schematic diagram of the structure of a random access device provided in an embodiment of the present application;

[0043] Fig. 9 A schematic diagram of the structure of another random access device provided in an embodiment of the present application;

[0044] Fig.10 A schematic diagram of the structure of another random access device provided in an embodiment of the present application;

[0045] Fig.11 A schematic diagram of the structure of another random access device provided in an embodiment of the present application;

[0046] Fig.11a A schematic diagram of a downlink information sending process provided in an embodiment of the present application;

[0047] Fig.12 A schematic diagram of the structure of a first communication node provided in an embodiment of the present application;

[0048] Fig.13 A schematic diagram of the structure of a second communication node provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present application more clear, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0050] The steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions. Also, although a logical sequence is shown in the flowchart, in some cases, the steps shown or described can be performed in a sequence different from that shown here.

[0051] In an exemplary embodiment, Figure 1 A flow chart of a random access method provided in an embodiment of the present application, the method may be applicable to the case of implementing random access of a third communication node, the method may be performed by a random access device provided in the present application, the random access device may be implemented by software and / or hardware, and integrated on a first communication node. Wherein, the first communication node may be a relay node (Relay-Node, RN). In the present application, the third communication node side belongs to transparent transmission.

[0052] like Figure 1As shown, a random access method provided by the present application includes S110.

[0053] S110. Send first timing advance information and corresponding first preamble code information to the second communication node.

[0054] In the present application, the first communication node may be a RN, the second communication node may be a base station, and the third communication node may be a user equipment (User Equipment, UE).

[0055] The first timing advance information and the first preamble code information are used by a third communication node to complete random access.

[0056] It should be noted that the "first", "second", "third", etc. in this application are only used for distinction. For example, the "first" and "second" in the first timing advance (TA) information and the second TA information are only used to distinguish the TA information, wherein the first TA information can be considered as the TA information sent by the first communication node to the second communication node. The second TA information can be considered as the TA information sent by the second communication node to the first communication node, wherein the second TA information can be included in message 2.

[0057] The first TA information corresponds to the first preamble information sent by the third communication node (such as UE), such as the preamble index information and / or the time-frequency resource information occupied by the random access channel sending the Preamble. After detecting the preamble, the RN can estimate the corresponding first TA information based on the first preamble information.

[0058] The first TA information is obtained by the RN by detecting the Preamble sent by the UE. The UE uses the first TA information to adjust its timing advance, so as to ensure the uplink synchronization of the uplink channel from the UE to the RN.

[0059] The present application sends the first TA information and the corresponding first preamble code information to the second communication node to control the second communication node to complete the random access of the third communication node.

[0060] Specifically, the random access method of the present application may include detecting a preamble sent by a third communication node to obtain first preamble information; then estimating the corresponding first TA information based on the first preamble information; and finally sending the first TA information and the corresponding first preamble information to the second communication node, so that the second communication node completes the random access of the third communication node. Exemplarily, the RN is responsible for receiving Msg3 sent by the UE and sending Msg3 to the base station. The Msg3 sent by the UE is for the RN to receive. Before sending Msg3, the RN may send the first TA information and the corresponding first preamble information to the second communication node.

[0061] The present application provides a random access method, which sends first timing advance information and corresponding first preamble information to a second communication node, and uses this method to effectively implement random access of a third communication node. In particular, for a third communication node with poor signal quality, random access of the third communication node is implemented without increasing the power consumption of the third communication node, that is, the system resource overhead.

[0062] Based on the above embodiment, a variant embodiment of the above embodiment is proposed. It should be noted that in order to make the description concise, only the differences from the above embodiment are described in the variant embodiment.

[0063] In one embodiment, the first preamble information includes at least one of the following:

[0064] Index information of the preamble;

[0065] Information about the time-frequency resources of the random access channel occupied by the preamble.

[0066] The first preamble information can be considered as identification information of the preamble, which is used to distinguish the preamble. In this embodiment, the preamble can be identified by at least one of the following: index information of the preamble; time-frequency resource information of the random access channel occupied by the preamble.

[0067] In one embodiment, the method further includes:

[0068] Detecting message 2 (Message 2, Msg 2) sent by the second communication node, wherein the message 2 includes second timing advance information and corresponding second preamble information; if the message 2 satisfies a first condition, detecting the message 3 sent by the third communication node according to the scheduling information of the message 3 indicated by the first uplink grant information corresponding to the second preamble information, wherein the first condition includes at least one of the following:

[0069] The second preamble information is the same as the first preamble information;

[0070] The second timing advance information is the same as the first timing advance information.

[0071] The second preamble code information includes at least one of the following: index information of the preamble code; and time-frequency resource information of the random access channel occupied by the preamble code.

[0072] Msg2 is sent by the base station to the terminal and can also be received by the RN.

[0073] Among them, Msg2 can be used to determine whether to detect message 3 sent by the third communication node. After detecting message 3, message 3 can be sent to the base station to achieve random access of the third communication node.

[0074] Specifically, the message 3 is detected under at least one of the following conditions: the second Preamble information is the first Preamble information; and the second TA information is the first TA information.

[0075] An uplink grant, namely a UL grant, indicates relevant information of uplink scheduling, for example, the UL grant includes resource configuration information occupied by an uplink channel, a modulation and coding scheme used when sending data on the uplink channel, and the like.

[0076] In the present application, the first uplink grant information includes scheduling information for Msg3 transmission.

[0077] The RN may apply for uplink (UL) resources from the base station to send Msg3 to the base station. The action of applying for UL resources may occur after the RN successfully receives Msg3 from the UE.

[0078] In one embodiment, the method further includes: sending confirmation information or uplink resource request information to the second communication node when the message 3 is detected. The confirmation information or uplink resource request information can be used to notify the base station that the first communication node has detected the message 3.

[0079] In one embodiment, the method further includes: receiving second uplink grant information carried in a downlink control channel sent by the second communication node; and sending the message 3 to the second communication node according to the uplink resources indicated by the second uplink grant information.

[0080] The RN receives a physical downlink control channel (PDCCH) sent by the base station, which carries the second uplink grant information. The RN sends Msg3 to the base station according to the uplink resources indicated by the second uplink grant information to complete random access of the third communication node.

[0081] In one embodiment, the method further includes: receiving third uplink grant information carried in a downlink control channel sent by the second communication node, wherein the third uplink grant information includes retransmission scheduling information of message 3 of the third communication node.

[0082] The third uplink grant information can be carried in the downlink control channel when the base station does not successfully receive message 3. The RN receives the PDCCH sent by the base station, and the PDCCH carries the third uplink grant information, which is the retransmission scheduling information of Msg3 of the third communication node. The RN detects the retransmission information of Msg3 sent by the third communication node according to the third uplink grant information.

[0083] In one embodiment, the downlink control channel also carries second indication information, and the second indication information is indication information indicating detection of message 3 sent by the third communication node on the resources indicated by the third uplink grant information. In the presence of the second indication information, the RN detects the Msg3 retransmission information sent by the third communication node according to the third uplink grant information.

[0084] The base station configures the RN to send Msg3 to the base station's uplink grant information, which occurs before the RN successfully receives the UE's Msg3. The uplink grant information can be directly configured in the random access response (RAR) or sent to the RN through signaling or pre-configured to the RN. If the RN does not successfully receive the UE's Msg3, it can send non-confirmation indication information to the base station through the uplink grant information, such as sending NACK to the eNB, and the eNB can schedule the UE Msg3 retransmission resources.

[0085] In one embodiment, the method further includes: when the message 3 is detected, sending the message 3 to the second communication node via an uplink channel, wherein the scheduling information of the uplink channel is carried in the message 2 or sent via a downlink channel.

[0086] The scheduling information of the uplink channel may be referred to as uplink grant information. The downlink channel includes at least one of the following: PDCCH; system information. The transmission time of the downlink channel is before the RN receives the Msg3 sent by the third communication node.

[0087] In one embodiment, the method further includes one of the following operations:

[0088] receiving confirmation information sent by the second communication node;

[0089] A downlink control channel carrying downlink grant information is detected.

[0090] After sending Msg3 to the base station through the uplink channel, one of the following operations may also be included:

[0091] RN receives confirmation information sent by the base station, that is, ACK information;

[0092] The RN detects a downlink control channel, and the PDCCH carries a DL grant.

[0093] When the downlink grant information, ie, DL grant, is detected in the PDCCH, the Msg3 information sent by the RN is successfully received by the base station. The DL grant is the scheduling information of message 4, ie, Msg4. The downlink grant information can be used to indicate that the base station successfully receives Msg3.

[0094] In one embodiment, the method further includes: in a case where message 3 is not detected, sending first indication information to the second communication node, wherein the first indication information indicates at least one of the following:

[0095] Non-acknowledgement indication information, i.e. NACK information;

[0096] Message 3 retransmission indication information.

[0097] The NACK information indicates that the RN has not successfully received the Msg3. In the case where the first indication information indicates the Msg3 retransmission indication information, it can be explained that the base station has not successfully received the Msg3.

[0098] In one embodiment, the method further includes: detecting a downlink control channel; when the scrambled radio network temporary identifier RNTI used by the downlink control information carried in the downlink control channel is a temporary cell radio network temporary identifier (Temporary Cell-Radio Network Temporary Identifier, TC-RNTI), detecting the message 3 sent by the third communication node on the resources indicated by the fourth uplink grant information in the downlink control information;

[0099] The TC-RNTI is the RNTI configured in the random access response corresponding to the second preamble code information in the message 2.

[0100] For example, Figure 2 A schematic diagram of a random access process for Msg3 transmission provided in an embodiment of the present application, Figure 3 The present invention provides a flow chart of a random access process for retransmission of Msg3. Figure 2-3 As shown, the random process can be performed by the first communication node RN, the second communication node eNB (ie, base station) and the third communication node UE.

[0101] Specifically, the preamble code sent by the terminal on the random access channel (Physical Random Access Channel, PRACH) has an index information of 1. RN and the base station perform Preamble detection on the random access channel. RN sends the detected Preamble index information and the TA information corresponding to the Preamble to the base station. In addition, the coverage enhancement (CE) of the terminal can also be sent to the base station. For example, when RN detects that the Preamble index information is 1 and the corresponding TA information is TA1, RN sends the Preamble index information 1 and TA1 to the base station.

[0102] Then, the base station sends the TA1 information through Msg2. Furthermore, the Msg2 also includes the Preamble index information corresponding to TA1. Msg2 can also include the uplink grant information of Msg3 (i.e., UL grant for msg3 with smaller repetition), which can include the number of repetitions of Msg3, and the number of repetitions is configured with a small value.

[0103] After receiving the Msg2 information, the terminal detects TA1 corresponding to Preamble index 1 and detects UL grant, adjusts its own timing advance according to TA1, and then sends Msg3 on the PUSCH resources indicated by the UL grant.

[0104] After receiving the Msg2 information, the RN detects that the Msg2 includes Preamble index 1, and the TA information corresponding to the Preamble index 1 is TA1, and then detects the Msg3 sent by the terminal in the PUSCH resource indicated by the corresponding UL grant.

[0105] In one example, when the RN detects Msg3 sent by the terminal, it sends uplink channel resource request information to the base station. After the base station responds to the uplink channel resource request information, it sends ULgrant on the downlink control channel. After receiving the UL grant, the RN sends Msg3 to the base station on the uplink channel indicated by the UL grant. After sending Msg3, the terminal detects the downlink control channel. The downlink control channel carries DL grant or UL grant. The DL grant indicates the scheduling information of Msg4; the UL grant carries the scheduling information of the retransmission of Msg3.

[0106] In one example, when the RN detects Msg3 sent by the terminal, the Msg3 is sent to the base station through the uplink channel. The scheduling information UL grant of the uplink channel is carried in Msg2 or the scheduling information UL grant of the uplink channel is carried through PDCCH. PDCCH is sent by the base station to the RN, and the sending time of PDCCH is before the RN receives the Msg3 sent by the terminal.

[0107] After sending Msg3 to the base station, the RN performs one of the following operations:

[0108] The RN receives ACK information sent by the base station;

[0109] The RN detects a downlink control channel, and the PDCCH carries a DL grant.

[0110] When the DL grant is detected in the PDCCH, it indicates that the Msg3 information sent by the RN is successfully received by the base station. The DL grant is the scheduling information of Msg4.

[0111] The communication systems of the embodiments of the present application include but are not limited to: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system or 5G New Radio (NR) system, etc.

[0112] In an exemplary embodiment, the present application also provides a random access method. Figure 4A flowchart of another random access method provided in an embodiment of the present application. The method may be applicable to a case where a second communication node completes random access to a third communication node. The method may be performed by a random access device, which may be implemented by software and / or hardware and integrated on the second communication node. The second communication node may be a base station.

[0113] like Figure 4 As shown, the random access method provided by the present application includes S410 and S420.

[0114] S410. Receive first timing advance information and corresponding first preamble code information sent by a first communication node.

[0115] S420. Complete random access of a third communication node based on the first timing advance and the first preamble code information.

[0116] In order to achieve random access of a third communication node with poor signal quality, the second communication node in the present application can receive the first timing advance information and the corresponding first preamble code information sent by the first communication node.

[0117] The process of completing access is not limited, as long as the first TA information and the corresponding first preamble information for completing random access are sent by the first communication node. The contents that are not yet detailed in this embodiment can be referred to the above embodiments, and will not be repeated here.

[0118] The random access method provided in the embodiment of the present application receives the first timing advance information and the corresponding first preamble information sent by the first communication node; and completes the random access of the third communication node based on the first timing advance and the first preamble information. The random access of the third communication node is effectively realized by using this method. In particular, for the third communication node with poor signal quality, the random access of the third communication node is realized without increasing the power consumption of the third communication node, that is, the system resource overhead.

[0119] Based on the above embodiment, a variant embodiment of the above embodiment is proposed. It should be noted that in order to make the description concise, only the differences from the above embodiment are described in the variant embodiment.

[0120] In one embodiment, the first preamble information includes at least one of the following:

[0121] Index information of the preamble;

[0122] Information about the time-frequency resources of the random access channel occupied by the preamble.

[0123] In one embodiment, the method further includes:

[0124] Sending message 2 to the first communication node, wherein the message 2 includes second timing advance information and corresponding second preamble information;

[0125] When the first communication node is controlled to detect the message 3 sent by the third communication node according to the scheduling information of the message 3 indicated by the first uplink grant information corresponding to the second preamble information, the message 2 satisfies the first condition, wherein the first condition includes at least one of the following:

[0126] The second preamble information is the same as the first preamble information;

[0127] The second timing advance information is the same as the first timing advance information.

[0128] In one embodiment, the method further includes:

[0129] Receive confirmation information or uplink resource request information sent by the first communication node.

[0130] In one embodiment, the method further includes:

[0131] Sending second uplink grant information carried in a downlink control channel to the first communication node; the second uplink grant information instructs the first communication node to send uplink resources of Msg3.

[0132] In one embodiment, the method further includes:

[0133] The third uplink grant information carried in the downlink control channel is sent to the first communication node, wherein the third uplink grant information includes retransmission scheduling information of the message 3 of the third communication node.

[0134] In one embodiment, the downlink control channel also carries second indication information, where the second indication information is indication information indicating detection of message 3 sent by the third communication node on the resources indicated by the third uplink grant information.

[0135] In one embodiment, the method further includes:

[0136] The message 3 sent by the first communication node is detected through an uplink channel, wherein the scheduling information of the uplink channel is carried in the message 2 or sent through a downlink channel.

[0137] In one embodiment, the method further includes one of the following operations:

[0138] Sending confirmation information to the first communication node;

[0139] Downlink grant information is sent to the first communication node, where the downlink grant information is carried on a downlink control channel.

[0140] In one embodiment, the method further includes:

[0141] Receive first indication information sent by a first communication node, wherein the first indication information indicates at least one of the following:

[0142] Non-confirmation instructions;

[0143] Message 3 retransmission indication information: When the first indication information is received, it can be indicated that the first communication node has not successfully detected the message 3.

[0144] In one embodiment, the method further includes:

[0145] When controlling the first communication node to detect message 3 sent by the third communication node, the downlink control information is carried through the downlink control channel, and the scrambled radio network temporary identifier RNTI used by the downlink control information is the temporary cell radio network temporary identifier TC-RNTI. The resources indicated by the fourth uplink grant information in the downlink control information are the resources for detecting message 3.

[0146] The TC-RNTI is the RNTI configured in the random access response corresponding to the second preamble code information in the message 2.

[0147] In an exemplary implementation, the present application also provides a random access method. Figure 5 A flow chart of another random access method provided in an embodiment of the present application. The method may be applicable to the case of implementing random access of a third communication node. The method may be performed by a random access device provided in the present application, and the random access device may be implemented by software and / or hardware and integrated on a first communication node. The first communication node may be a relay node (RN). The second communication node may be a base station, and the third communication node may be a UE.

[0148] like Figure 5 As shown, the random access method provided by the present application includes S510.

[0149] S510. When message 3 is detected, send the message 3 to the second communication node via an uplink channel.

[0150] The scheduling information of the uplink channel is carried in message 2 or sent through a downlink channel. The downlink channel includes at least one of the following: PDCCH; system information.

[0151] The sending time of the downlink channel is before the time when the RN receives the Msg3 sent by the terminal.

[0152] In this embodiment, RN is only responsible for forwarding Msg3 of UE, and UE also needs to send Msg3 to the base station. The resource used by RN to forward Msg3 can be the resource used by UE to send Msg3, or it can be a new uplink resource, which needs to be applied to the base station first. For example, after RN successfully receives Msg3, it applies to the base station for uplink resources.

[0153] In one embodiment, when RN applies for new uplink resources to forward Msg3, the base station can only request RN to resend Msg3 if Msg3 is not received successfully. At this time, UE is not clear and is still blindly detecting the PDCCH carrying Msg4. It should be noted that the premise of only requesting RN to resend Msg3 is that RN first successfully receives Msg3, that is, RN first sends a Msg3 confirmation message to the base station.

[0154] A random access method provided by an embodiment of the present application, when a message 3 is detected, sends the message 3 to a second communication node through an uplink channel, and the method effectively implements random access of a third communication node. In particular, for a third communication node with poor signal quality, random access of the third communication node is implemented without increasing the power consumption of the third communication node, that is, the system resource overhead.

[0155] Based on the above embodiment, a variant embodiment of the above embodiment is proposed. It should be noted that in order to make the description concise, only the differences from the above embodiment are described in the variant embodiment.

[0156] In one embodiment, before detecting message 3, the method further includes:

[0157] Detecting a message 2 sent by the second communication node, wherein the message 2 includes third timing advance information and corresponding third preamble information;

[0158] When the message 2 satisfies the second condition, the message 3 sent by the third communication node is detected according to the scheduling information of the message 3 indicated by the fifth uplink grant information corresponding to the third preamble code information in the message 2, wherein the second condition includes: the third preamble code information is the fourth preamble code information; wherein the fourth preamble code information is the detected preamble code information.

[0159] The third preamble code information includes at least one of the following: index information of the preamble code; and time-frequency resource information of the random access channel occupied by the preamble code.

[0160] In one embodiment, the energy value of the fourth preamble information is greater than the first threshold, that is, when the energy value of the preamble detected by the RN is greater than the first threshold, the preamble belongs to the fourth preamble information (that is, the fourth preamble information is the detected preamble information).

[0161] The first threshold is configured by the base station or adopts a default configuration.

[0162] In one embodiment, the method further includes:

[0163] Receive sixth uplink grant information, where the uplink channel resources indicated by the sixth uplink grant information are used to retransmit the message 3, and the sixth uplink grant information is sent when the second communication node does not detect the message 3.

[0164] In one embodiment, the method further includes: sending confirmation information to the second communication node when the message 3 is detected. After successfully detecting Msg3, sending confirmation information, i.e., ACK information, to the base station, the ACK information indicating that the RN successfully detects Msg3.

[0165] In one embodiment, Figure 6 A flowchart of another random access method provided in an embodiment of the present application is shown in FIG. Figure 6 , the first communication node RN detects the preamble sent by the third communication node UE and obtains the first preamble information. When the base station detects the preamble information, it sends message 2, namely Msg2. The message 2 can be sent to the third communication node, and the first communication node can detect the message 2, which includes the third timing advance information and the corresponding third preamble information. The scheduling information of the uplink channel, namely the uplink grant information, can be carried in the message 2.

[0166] After receiving message 2, UE transmits message 3 to the base station. RN can detect message 3 and send message 3 to the base station through the uplink channel. For example, message 3 is sent on the uplink resource, that is, the resource on which UE sends message 3. After receiving message 3, the base station sends message 4 to the UE, and message 4 can indicate that the base station has successfully received message 3.

[0167] In an exemplary embodiment, the present application also provides a random access method. Figure 7 A flowchart of another random access method provided in an embodiment of the present application. The method may be applicable to a case where a second communication node completes random access to a third communication node. The method may be performed by a random access device, which may be implemented by software and / or hardware and integrated on the second communication node. The second communication node may be a base station.

[0168] like Figure 7 As shown, the random access method provided by the present application includes S710 and S720.

[0169] S710. Receive message 3 sent by the first communication node.

[0170] The message 3 in this embodiment may be sent by the first communication node, that is, the first communication node forwards the message 3 of the third communication node to complete the random access of the third communication node with poor signal quality.

[0171] S720. Complete random access of the third communication node based on the message 3.

[0172] The specific means of completing random access are not limited here. The base station in this embodiment can also receive message 3 of the third communication node to complete the random access of the third communication node. The contents that are not yet detailed in this embodiment can be referred to the above embodiment, and will not be repeated here.

[0173] The random access method provided by the present application receives a message 3 sent by a first communication node; and completes random access of a third communication node based on the message 3. The method effectively implements random access of a third communication node. In particular, for a third communication node with poor signal quality, random access of the third communication node is implemented without increasing the power consumption of the third communication node, i.e., the system resource overhead.

[0174] Based on the above embodiment, a variant embodiment of the above embodiment is proposed. It should be noted that in order to make the description concise, only the differences from the above embodiment are described in the variant embodiment.

[0175] In one embodiment, the method further includes:

[0176] Send message 2, wherein the message 2 includes third timing advance information and corresponding third preamble code information; when controlling the first communication node to detect the message 3 sent by the third communication node according to the scheduling information of the message 3 indicated by the fifth uplink grant information corresponding to the third preamble code information in the message 2, the message 2 satisfies the second condition.

[0177] The second condition includes: the third preamble information is the fourth preamble information; the fourth preamble information is the detected preamble information. The message 2 can be sent to the third communication node, and the first communication node can receive the message 2.

[0178] In one embodiment, the energy value of the fourth preamble code information is greater than a first threshold.

[0179] In one embodiment, the method further includes:

[0180] In the case that Msg3 is not successfully detected, sixth uplink grant information is sent to the first communication node, and the uplink channel resources indicated by the sixth uplink grant information are used for retransmitting the message 3.

[0181] In one embodiment, the method further includes:

[0182] Receive confirmation information sent by the first communication node. The confirmation information indicates that the first communication node successfully detects message 3.

[0183] In an exemplary embodiment, the present application also provides a random access device, Figure 8 Schematic diagram of a random access device provided in an embodiment of the present application. The device provided in an embodiment of the present application can be configured in a first communication node, such as Figure 8 As shown, the device includes: a sending module 81, which is configured to send first timing advance information and corresponding first preamble code information to a second communication node.

[0184] The random access device provided in this embodiment is used to implement the following Figure 1 The random access method of the embodiment shown in the figure, the random access device provided in this embodiment implements the principle and technical effect of Figure 1 The random access method of the illustrated embodiment is similar and will not be described again here.

[0185] Based on the above embodiment, a variant embodiment of the above embodiment is proposed. It should be noted that in order to make the description concise, only the differences from the above embodiment are described in the variant embodiment.

[0186] In one embodiment, the first preamble code information includes at least one of the following: index information of the preamble code; and time-frequency resource information of the random access channel occupied by the preamble code.

[0187] In one embodiment, the device further includes: a message 2 detection module, configured to detect a message 2 sent by the second communication node, wherein the message 2 includes second timing advance information and corresponding second preamble information; if the message 2 satisfies the first condition, the message 3 sent by the third communication node is detected according to the scheduling information of the message 3 indicated by the first uplink grant information corresponding to the second preamble information, wherein the first condition includes at least one of the following:

[0188] The second preamble information is the same as the first preamble information;

[0189] The second timing advance information is the same as the first timing advance information.

[0190] In one embodiment, the device further includes: a confirmation sending module, configured to send confirmation information or uplink resource request information to the second communication node when the message 3 is detected.

[0191] In one embodiment, the device further comprises:

[0192] A receiving module, configured to receive second uplink grant information carried in a downlink control channel sent by the second communication node;

[0193] The forwarding module is configured to send the message 3 to the second communication node according to the uplink resources indicated by the second uplink grant information.

[0194] In one embodiment, the device further comprises:

[0195] The retransmission indication module is configured to receive third uplink grant information carried in a downlink control channel sent by the second communication node, wherein the third uplink grant information includes retransmission scheduling information of message 3 of the third communication node.

[0196] In one embodiment, the downlink control channel also carries second indication information, where the second indication information is indication information indicating detection of message 3 sent by the third communication node on the resources indicated by the third uplink grant information.

[0197] In one embodiment, the device further comprises:

[0198] The retransmission forwarding module is configured to send the message 3 to the second communication node through an uplink channel when the message 3 is detected, wherein the scheduling information of the uplink channel is carried in the message 2 or sent through a downlink channel.

[0199] In one embodiment, the device further comprises one of the following:

[0200] A confirmation receiving module, configured to receive confirmation information sent by the second communication node;

[0201] The downlink grant information detection module is configured to detect a downlink control channel carrying downlink grant information.

[0202] In one embodiment, the device further includes: a detection failure indication module, configured to: send first indication information to the second communication node when message 3 is not detected, wherein the first indication information indicates at least one of the following:

[0203] Non-confirmation instructions;

[0204] Message 3 retransmission indication information.

[0205] In one embodiment, the device further comprises:

[0206] A downlink control channel detection module is configured to: detect a downlink control channel; and detect a message 3 sent by the third communication node on a resource indicated by the fourth uplink grant information in the downlink control information when the scrambled radio network temporary identifier RNTI used by the downlink control information carried in the downlink control channel is a temporary cell radio network temporary identifier TC-RNTI;

[0207] The TC-RNTI is the RNTI configured in the random access response corresponding to the second preamble code information in the message 2.

[0208] The present application also provides a random access device, Fig. 9 This is a schematic diagram of the structure of another random access device provided in an embodiment of the present application. The device can be configured in a second communication node, such as Fig. 9 As shown, the device includes: a receiving module 910, configured to receive first timing advance information and corresponding first preamble code information sent by a first communication node; an access module 920, configured to complete random access of a third communication node based on the first timing advance and the first preamble code information.

[0209] The random access device provided in this embodiment is used to implement the following Figure 4 The random access method of the embodiment shown in the figure, the random access device provided in this embodiment implements the principle and technical effect of Figure 4 The random access method of the illustrated embodiment is similar and will not be described again here.

[0210] Based on the above embodiment, a variant embodiment of the above embodiment is proposed. It should be noted that in order to make the description concise, only the differences from the above embodiment are described in the variant embodiment.

[0211] In one embodiment, the first preamble information includes at least one of the following:

[0212] Index information of the preamble;

[0213] Information about the time-frequency resources of the random access channel occupied by the preamble.

[0214] In one embodiment, the device further includes: a message 2 sending module, configured to send a message 2 to the first communication node, wherein the message 2 includes the second timing advance information and the corresponding second preamble information;

[0215] When the first communication node is controlled to detect the message 3 sent by the third communication node according to the scheduling information of the message 3 indicated by the first uplink grant information corresponding to the second preamble information, the message 2 satisfies the first condition, wherein the first condition includes at least one of the following:

[0216] The second preamble information is the same as the first preamble information;

[0217] The second timing advance information is the same as the first timing advance information.

[0218] In one embodiment, the device further comprises:

[0219] The confirmation module is configured to receive confirmation information or uplink resource request information sent by the first communication node.

[0220] In one embodiment, the device further includes: a second uplink grant information sending module, configured to send second uplink grant information carried in a downlink control channel to the first communication node; the second uplink grant information instructs the first communication node to send uplink resources of Msg3.

[0221] In one embodiment, the device further includes: a third uplink grant information sending module, configured to send third uplink grant information carried in a downlink control channel to the first communication node, wherein the third uplink grant information includes retransmission scheduling information of message 3 of the third communication node.

[0222] In one embodiment, the downlink control channel also carries second indication information, where the second indication information is indication information indicating detection of message 3 sent by the third communication node on the resources indicated by the third uplink grant information.

[0223] In one embodiment, the device further includes: a detection module, configured to detect the message 3 sent by the first communication node through an uplink channel, wherein the scheduling information of the uplink channel is carried in the message 2 or sent through a downlink channel.

[0224] In one embodiment, the device further comprises one of the following:

[0225] A confirmation information sending module, configured to send confirmation information to the first communication node;

[0226] The downlink grant information sending module is configured to send downlink grant information to the first communication node, and the downlink grant information is carried on a downlink control channel.

[0227] In one embodiment, the device further includes: a retransmission indication module, configured to receive first indication information sent by the first communication node, wherein the first indication information indicates at least one of the following:

[0228] Non-confirmation instructions;

[0229] Message 3 retransmission indication information: When the first indication information is received, it can be indicated that the first communication node has not successfully detected the message 3.

[0230] In one embodiment, the device also includes: a downlink control information sending module, which is configured to carry the downlink control information through a downlink control channel when controlling the first communication node to detect the message 3 sent by the third communication node, the scrambled wireless network temporary identifier RNTI used by the downlink control information is the temporary cell wireless network temporary identifier TC-RNTI, and the resources indicated by the fourth uplink grant information in the downlink control information are the resources for detecting message 3.

[0231] The TC-RNTI is the RNTI configured in the random access response corresponding to the second preamble code information in the message 2.

[0232] The present application also provides a random access device, Fig.10 A schematic diagram of the structure of another random access device provided in an embodiment of the present application. The device provided in an embodiment of the present application can be configured in a first communication node, such as Fig.10 As shown, the device includes: a sending module 1010, which is configured to send the message 3 to the second communication node through an uplink channel when the message 3 is detected, wherein the scheduling information of the uplink channel is carried in the message 2 or sent through a downlink channel.

[0233] The random access device provided in this embodiment is used to implement the following Figure 5 The random access method of the embodiment shown in the figure, the random access device provided in this embodiment implements the principle and technical effect of Figure 5 The random access method of the illustrated embodiment is similar and will not be described again here.

[0234] Based on the above embodiment, a variant embodiment of the above embodiment is proposed. It should be noted that in order to make the description concise, only the differences from the above embodiment are described in the variant embodiment.

[0235] In one embodiment, the device further includes: a detection module, configured to detect a message 2 sent by the second communication node before detecting the message 3, wherein the message 2 includes the third timing advance information and the corresponding third preamble information;

[0236] When the message 2 satisfies the second condition, the message 3 sent by the third communication node is detected according to the scheduling information of the message 3 indicated by the fifth uplink grant information corresponding to the third preamble information in the message 2, wherein the second condition includes:

[0237] The third preamble information is the fourth preamble information; wherein the fourth preamble information is the detected preamble information.

[0238] In one embodiment, the energy value of the fourth preamble code information is greater than a first threshold.

[0239] In one embodiment, the device further includes: a receiving module, configured to receive sixth uplink grant information, wherein the uplink channel resources indicated by the sixth uplink grant information are used to retransmit the message 3, and the sixth uplink grant information is sent when the second communication node does not detect the message 3.

[0240] In one embodiment, the device further includes: a confirmation module, configured to send confirmation information to the second communication node when the message 3 is detected.

[0241] The present application provides a random access device. Fig.11 A schematic diagram of the structure of another random access device provided in an embodiment of the present application, the device can be configured in a second communication node, such as Fig.11 As shown, the device includes: a receiving module 1110, configured to receive a message 3 sent by a first communication node;

[0242] The access module 1120 is configured to complete random access of the third communication node based on the message 3.

[0243] The random access device provided in this embodiment is used to implement the following Figure 7 The random access method of the embodiment shown in the figure, the random access device provided in this embodiment implements the principle and technical effect of Figure 7 The random access method of the illustrated embodiment is similar and will not be described again here.

[0244] Based on the above embodiment, a variant embodiment of the above embodiment is proposed. It should be noted that in order to make the description concise, only the differences from the above embodiment are described in the variant embodiment.

[0245] In one embodiment, in one embodiment, the device also includes a message 2 sending module, which is configured to: send message 2, wherein the message 2 includes third timing advance information and corresponding third preamble code information; when controlling the first communication node to detect the message 3 sent by the third communication node according to the scheduling information of the message 3 indicated by the fifth uplink grant information corresponding to the third preamble code information in the message 2, the message 2 satisfies the second condition.

[0246] The second condition includes: the third preamble information is the fourth preamble information; the fourth preamble information is the detected preamble information. The message 2 can be sent to the third communication node, and the first communication node can receive the message 2.

[0247] In one embodiment, the energy value of the fourth preamble code information is greater than a first threshold.

[0248] In one embodiment, the device further includes: a sixth uplink grant information sending module, configured to send the sixth uplink grant information to the first communication node when Msg3 is not successfully detected, and the uplink channel resources indicated by the sixth uplink grant information are used to retransmit the message 3.

[0249] In one embodiment, the device further includes a confirmation module configured to receive confirmation information sent by the first communication node. The confirmation information indicates that the first communication node successfully detects the message 3.

[0250] The present application also provides a downlink message sending method, which is applied to a first communication node, such as an RN, and the method includes:

[0251] When detecting a downlink message sent by the second communication node and the downlink message meets a third condition, the downlink message is sent to the third communication node.

[0252] The RN may be responsible for forwarding downlink messages, such as Msg2, Msg4, and PDCCH, while the base station also continues to send the above messages to the terminal.

[0253] The downlink information sending method provided in this embodiment sends the downlink message to the third communication node when a downlink message sent by the second communication node is detected and the downlink message satisfies the third condition. The method can be used to forward the downlink message through the first communication node, such as forwarding the downlink message sent by the second communication node to the third communication node.

[0254] When the third condition is met, the RN can forward the downlink message, and the third condition is not limited here.

[0255] Based on the above embodiment, a variant embodiment of the above embodiment is proposed. It should be noted that in order to make the description concise, only the differences from the above embodiment are described in the variant embodiment.

[0256] In one embodiment, the downlink message includes at least one of the following:

[0257] A scheduling message of message 2 carried in the downlink control information;

[0258] A scheduling message of message 4 carried in the downlink control information;

[0259] Message 2;

[0260] Message 4.

[0261] In one embodiment, the third condition includes at least one of the following:

[0262] In a case where the downlink message is message 2, and the message 2 includes fifth preamble information, wherein the fifth preamble information is the detected preamble information, such as an energy threshold of the fifth preamble information is greater than the first threshold;

[0263] In the case where the downlink message is a scheduling message of message 4 carried in the downlink control information, the downlink control information is scrambled using a temporary cell wireless network temporary identifier, and the preamble information corresponding to the random access response carrying the temporary cell wireless network temporary identifier is the detected preamble information, such as an energy threshold of the corresponding preamble information is greater than a first threshold;

[0264] In the case where the downlink message is message 4, the preamble code information corresponding to the random access response of the temporary cell wireless network temporary identifier used for scrambling the downlink control information carrying the scheduling information of the message 4 is the detected preamble code information, such as the energy threshold of the corresponding preamble code information is greater than the first threshold.

[0265] In one embodiment, the resources used to send the downlink message are configured in the system information or through a downlink control channel.

[0266] The preamble information described in the present application, such as the fifth preamble information, the fourth preamble information, the third preamble information, the second preamble information, the first preamble information, and the preamble information corresponding to the random access response, includes at least one of the following: index information of the preamble;

[0267] Information about the time-frequency resources of the random access channel occupied by the preamble.

[0268] Fig.11a A schematic diagram of a downlink information sending process provided in an embodiment of the present application, such as Fig.11a As shown, the first communication node RN forwards Msg2 and Msg4 to the third communication node UE.

[0269] The present application also provides a downlink message sending device, which is integrated in a first communication node, such as an RN, and includes:

[0270] The sending module is configured to send the downlink message to the third communication node when detecting the downlink message sent by the second communication node and the downlink message meets the third condition.

[0271] The downlink message sending device provided in this embodiment is used to implement the downlink message sending method of the embodiment of the present application. The implementation principle and technical effect of the downlink message sending device provided in this embodiment are similar to those of the downlink message sending method of the embodiment of the present application, and will not be repeated here.

[0272] Based on the above embodiment, a variant embodiment of the above embodiment is proposed. It should be noted that in order to make the description concise, only the differences from the above embodiment are described in the variant embodiment.

[0273] In one embodiment, the downlink message includes at least one of the following:

[0274] A scheduling message of message 2 carried in the downlink control information;

[0275] A scheduling message of message 4 carried in the downlink control information;

[0276] Message 2;

[0277] Message 4.

[0278] In one embodiment, the third condition includes at least one of the following:

[0279] In a case where the downlink message is message 2, and the message 2 includes fifth preamble information, wherein the fifth preamble information is the detected preamble information;

[0280] In the case where the downlink message is a scheduling message of message 4 carried in the downlink control information, the downlink control information is scrambled using a temporary cell wireless network temporary identifier, and the preamble information corresponding to the random access response carrying the temporary cell wireless network temporary identifier is the detected preamble information;

[0281] In the case where the downlink message is message 4, the preamble information corresponding to the random access response of the temporary cell-radio network temporary identifier used for scrambling the downlink control information carrying the scheduling information of the message 4 is the detected preamble information.

[0282] In one embodiment, the resources used to send the downlink message are configured in the system information or through a downlink control channel.

[0283] The present application provides a first communication node, including:

[0284] one or more processors;

[0285] A storage device for storing one or more programs;

[0286] When the one or more programs are executed by the one or more processors, the one or more processors implement the downlink message sending method provided in the present application.

[0287] The present application provides a first communication node, Fig.12 A schematic diagram of the structure of a first communication node provided in an embodiment of the present application is shown in FIG. Fig.12 As shown, the first communication node provided by the present application includes one or more processors 1210 and a storage device 1220; the processor 1210 in the first communication node may be one or more, Figure 5 In the embodiment, a processor 1210 is taken as an example; the storage device 1220 is used to store one or more programs; the one or more programs are executed by the one or more processors 1210, so that the one or more processors 1210 implement the embodiment of the present application. Figure 1 or Figure 5 The method or downlink message sending method described.

[0288] The first communication node may further include: a communication device 1230 , an input device 1240 , and an output device 1250 .

[0289] The processor 1210, the storage device 1220, the communication device 1230, the input device 1240 and the output device 1250 in the first communication node may be connected via a bus or other means. Fig.12 The example of connecting through bus is taken in the following.

[0290] The input device 1240 may be used to receive input digital or character information and generate key signal input related to user settings and function control of the first communication node. The output device 1250 may include a display device such as a display screen.

[0291] The communication device 1230 may include a receiver and a transmitter. The communication device 1230 is configured to perform information transmission and reception communication according to the control of the processor 1210. For example, the first timing advance information and the corresponding first preamble information are transmitted or the message 3 or the downlink message is transmitted.

[0292] The storage device 1220, as a computer-readable storage medium, may be configured to store software programs, computer executable programs, and modules, such as program instructions / modules corresponding to the method described in the embodiment of the present application (e.g., the sending module 81 in the random access device, or the sending module 1010 in the random access device). The storage device 1220 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function; the storage data area may store data created according to the use of the first communication node, etc. In addition, the storage device 1220 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the storage device 1220 may further include a memory remotely arranged relative to the processor 1210, and these remote memories may be connected to the first communication node via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0293] The present application provides a second communication node, Fig.13 A schematic diagram of the structure of a second communication node provided in an embodiment of the present application, such as Fig.13 As shown, the second communication node provided by the present application includes one or more processors 1310 and a storage device 1320; the processor 1310 in the second communication node may be one or more, Fig.13 In the embodiment, a processor 1310 is taken as an example; the storage device 1320 is used to store one or more programs; the one or more programs are executed by the one or more processors 1310, so that the one or more processors 1310 implement the embodiment of the present application. Figure 4 or Figure 7 The method described.

[0294] The second communication node may further include: a communication device 1330 , an input device 1340 , and an output device 1350 .

[0295] The processor 1310, the storage device 1320, the communication device 1330, the input device 1340 and the output device 1350 in the second communication node may be connected via a bus or other means. Fig.13 The example of connecting through bus is taken in the following.

[0296] The input device 1340 may be used to receive input digital or character information and generate key signal input related to user settings and function control of the first communication node. The output device 1350 may include a display device such as a display screen.

[0297] The communication device 1330 may include a receiver and a transmitter. The communication device 1330 is configured to perform information transmission and reception communication according to the control of the processor 1310. For example, the communication device 1330 receives the first timing advance information and the corresponding first preamble information.

[0298] The storage device 1320, as a computer-readable storage medium, may be configured to store software programs, computer executable programs, and modules, such as program instructions / modules corresponding to the method described in the embodiment of the present application (for example, the receiving module 910 and the access module 920 in the random access device, or the receiving module 1110 and the access module 1120 in the random access device). The storage device 1320 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function; the storage data area may store data created according to the use of the first communication node, etc. In addition, the storage device 1320 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the storage device 1320 may further include a memory remotely arranged relative to the processor 1310, and these remote memories may be connected to the second communication node via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0299] The present application also provides a storage medium storing a computer program, which, when executed by a processor, implements any random access method or downlink message sending method described in the present application, such as a random access method applied to a first communication node or a second communication node.

[0300] The random access method applied to the first communication node includes: sending first timing advance information and corresponding first preamble code information to the second communication node.

[0301] The random access method applied to the second communication node includes: receiving first timing advance information and corresponding first preamble code information sent by the first communication node; and completing random access of the third communication node based on the first timing advance and the first preamble code information.

[0302] The random access method applied to the first communication node includes: when a message 3 is detected, sending the message 3 to the second communication node via an uplink channel, wherein the scheduling information of the uplink channel is carried in the message 2 or sent via a downlink channel.

[0303] The random access method applied to the second communication node includes: receiving a message 3 sent by the first communication node; and completing the random access of the third communication node based on the message 3.

[0304] A method for sending a downlink message includes sending the downlink message to a third communication node when detecting a downlink message sent by a second communication node and the downlink message meets a third condition.

[0305] The above description is merely an exemplary embodiment of the present application and is not intended to limit the protection scope of the present application.

[0306] It will be appreciated by those skilled in the art that the term user equipment encompasses any suitable type of wireless user equipment, such as a mobile phone, a portable data processing device, a portable web browser or a car-mounted mobile station.

[0307] In general, various embodiments of the present application can be implemented in hardware or dedicated circuits, software, logic or any combination thereof. For example, some aspects can be implemented in hardware, while other aspects can be implemented in firmware or software that can be executed by a controller, microprocessor or other computing device, although the present application is not limited thereto.

[0308] Embodiments of the present application may be implemented by executing computer program instructions by a data processor of a mobile device, for example in a processor entity, or by hardware, or by a combination of software and hardware. The computer program instructions may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages.

[0309] The block diagram of any logic flow in the drawings of the present application may represent program steps, or may represent interconnected logic circuits, modules and functions, or may represent a combination of program steps and logic circuits, modules and functions. A computer program may be stored on a memory. The memory may have any type suitable for the local technical environment and may be implemented using any suitable data storage technology, such as but not limited to read-only memory (ROM), random access memory (RAM), optical memory devices and systems (digital versatile discs (DVD) or compact disks (CD)), etc. Computer-readable media may include non-transient storage media. A data processor may be any type suitable for the local technical environment, such as but not limited to a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FGPAs) and a processor based on a multi-core processor architecture.

[0310] By way of exemplary and non-limiting examples, a detailed description of exemplary embodiments of the present application has been provided above. However, various modifications and adjustments to the above embodiments will be apparent to those skilled in the art when considered in conjunction with the accompanying drawings and claims, but will not depart from the scope of the present application. Therefore, the proper scope of the present application will be determined according to the claims.

Claims

1. A random access method, characterized in that: Applied to a first communication node, comprising: Sending first timing advance information and corresponding first preamble information to a second communication node; The first preamble information includes at least one of the following: Index information of the preamble; Information on the time-frequency resources of the random access channel occupied by the preamble; The method further comprises: Detecting a message 2 sent by the second communication node, wherein the message 2 includes second timing advance information and corresponding second preamble information; When the message 2 satisfies the first condition, the message 3 sent by the third communication node is detected according to the scheduling information of the message 3 indicated by the first uplink grant information corresponding to the second preamble information, wherein the first condition includes at least one of the following: The second preamble information is the same as the first preamble information; The second timing advance information is the same as the first timing advance information; The first uplink grant information is information indicating uplink scheduling; The method further includes: sending the coverage strength of the third communication node to the second communication node; Among them, the first communication node includes a relay node, the second communication node includes a base station, and the third communication node includes a terminal.

2. The method according to claim 1, characterized in that: Also includes: When the message 3 is detected, confirmation information or uplink resource request information is sent to the second communication node.

3. The method according to claim 2, characterized in that Also includes: Receiving second uplink grant information carried in a downlink control channel sent by the second communication node; The message 3 is sent to the second communication node according to the uplink resources indicated by the second uplink grant information.

4. The method according to claim 1, characterized in that Also includes: Receive third uplink grant information carried in the downlink control channel sent by the second communication node, wherein the third uplink grant information includes retransmission scheduling information of message 3 of the third communication node.

5. The method according to claim 4, characterized in that The downlink control channel also carries second indication information, where the second indication information is indication information for instructing detection of message 3 sent by the third communication node on the resources indicated by the third uplink grant information.

6. The method according to claim 1, characterized in that Also includes: When the message 3 is detected, the message 3 is sent to the second communication node via an uplink channel, wherein the scheduling information of the uplink channel is carried in the message 2 or sent via a downlink channel.

7. The method according to claim 3 or 6, characterized in that: Also include one of the following: receiving confirmation information sent by the second communication node; A downlink control channel carrying downlink grant information is detected.

8. The method according to claim 1, characterized in that: Also includes: In the case where message 3 is not detected, first indication information is sent to the second communication node, wherein the first indication information indicates at least one of the following: Non-confirmation instructions; Message 3 retransmission indication information.

9. The method according to claim 8, characterized in that Also includes: Detecting a downlink control channel; In a case where the scrambled radio network temporary identifier RNTI used by the downlink control information carried in the downlink control channel is a temporary cell radio network temporary identifier TC-RNTI, detecting message 3 sent by the third communication node on the resources indicated by the fourth uplink grant information in the downlink control information; The TC-RNTI is the RNTI configured in the random access response corresponding to the second preamble code information in the message 2.

10. A random access method, characterized in that: Applied to a second communication node, comprising: Receiving first timing advance information and corresponding first preamble information sent by a first communication node; Complete random access of a third communication node based on the first timing advance and the first preamble information; The first preamble information includes at least one of the following: index information of the preamble; time-frequency resource information of the random access channel occupied by the preamble; The method further comprises: Sending message 2 to the first communication node, wherein the message 2 includes second timing advance information and corresponding second preamble information; When the first communication node is controlled to detect the message 3 sent by the third communication node according to the scheduling information of the message 3 indicated by the first uplink grant information corresponding to the second preamble information, the message 2 satisfies the first condition; wherein the first condition includes at least one of the following: The second preamble information is the same as the first preamble information; the second timing advance information is the same as the first timing advance information; The first uplink grant information is information indicating uplink scheduling; The method further includes: receiving the coverage strength of the third communication node sent by the first communication node; Among them, the first communication node includes a relay node, the second communication node includes a base station, and the third communication node includes a terminal.

11. A random access method, characterized in that: Applied to a first communication node, comprising: When message 3 is detected, the message 3 is sent to the second communication node through an uplink channel, wherein the scheduling information of the uplink channel is carried in message 2 or sent through a downlink channel; Before detecting message 3, the following is also included: Detecting a message 2 sent by the second communication node, wherein the message 2 includes third timing advance information and corresponding third preamble information; When the message 2 satisfies the second condition, the message 3 sent by the third communication node is detected according to the scheduling information of the message 3 indicated by the fifth uplink grant information corresponding to the third preamble information in the message 2, wherein the second condition includes: The third preamble information is the fourth preamble information; wherein the fourth preamble information is the detected preamble information; The fifth uplink grant information is information indicating uplink scheduling; Among them, the first communication node includes a relay node, the second communication node includes a base station, and the third communication node includes a terminal.

12. The method according to claim 11, characterized in that The energy value of the fourth preamble code information is greater than the first threshold.

13. The method according to claim 11, characterized in that Also includes: Receive sixth uplink grant information, where the uplink channel resources indicated by the sixth uplink grant information are used to retransmit the message 3, and the sixth uplink grant information is sent when the second communication node does not detect the message 3.

14. The method according to claim 11, characterized in that Also includes: When the message 3 is detected, a confirmation message is sent to the second communication node.

15. A random access method, characterized in that: Applied to a second communication node, comprising: Receive message 3 sent by the first communication node; Completing random access of a third communication node based on the message 3; The method further comprises: Sending message 2, wherein the message 2 includes third timing advance information and corresponding third preamble information; When the first communication node is controlled to detect the message 3 sent by the third communication node according to the scheduling information of the message 3 indicated by the fifth uplink grant information corresponding to the third preamble information in the message 2, the message 2 satisfies the second condition; wherein the second condition includes: The third preamble information is the fourth preamble information; wherein the fourth preamble information is the detected preamble information; The fifth uplink grant information is information indicating uplink scheduling; Among them, the first communication node includes a relay node, the second communication node includes a base station, and the third communication node includes a terminal.

16. A random access device, characterized in that: Configured at the first communication node, comprising: A sending module, configured to send first timing advance information and corresponding first preamble information to a second communication node; The first preamble information includes at least one of the following: index information of the preamble; time-frequency resource information of the random access channel occupied by the preamble; The device further comprises: A message 2 detection module, configured to detect a message 2 sent by the second communication node, wherein the message 2 includes second timing advance information and corresponding second preamble information; if the message 2 satisfies a first condition, the message 3 sent by the third communication node is detected according to the scheduling information of the message 3 indicated by the first uplink grant information corresponding to the second preamble information; wherein the first condition includes at least one of the following: The second preamble information is the same as the first preamble information; the second timing advance information is the same as the first timing advance information; The sending module is further configured to send the coverage strength of the third communication node to the second communication node; Among them, the first communication node includes a relay node, the second communication node includes a base station, and the third communication node includes a terminal.

17. A random access device, characterized in that: Configured at the second communication node, comprising: A receiving module, configured to receive first timing advance information and corresponding first preamble information sent by a first communication node; an access module, configured to complete random access of a third communication node based on the first timing advance and the first preamble information; The first preamble information includes at least one of the following: index information of the preamble; time-frequency resource information of the random access channel occupied by the preamble; The device further comprises: A message 2 sending module is configured to send message 2 to the first communication node, wherein the message 2 includes second timing advance information and corresponding second preamble information; when the first communication node is controlled to detect the message 3 sent by the third communication node according to the scheduling information of the message 3 indicated by the first uplink grant information corresponding to the second preamble information, the message 2 satisfies the first condition, wherein the first condition includes at least one of the following: The second preamble information is the same as the first preamble information; the second timing advance information is the same as the first timing advance information; The receiving module is further configured to receive the coverage strength of the third communication node sent by the first communication node; Among them, the first communication node includes a relay node, the second communication node includes a base station, and the third communication node includes a terminal.

18. A random access device, characterized in that: Configured at the first communication node, comprising: A sending module, configured to send the message 3 to the second communication node through an uplink channel when the message 3 is detected, wherein the scheduling information of the uplink channel is carried in the message 2 or sent through a downlink channel; The device further comprises: A detection module is configured to detect a message 2 sent by the second communication node before detecting a message 3, wherein the message 2 includes third timing advance information and corresponding third preamble information; when the message 2 satisfies a second condition, the message 3 sent by the third communication node is detected according to the scheduling information of the message 3 indicated by the fifth uplink grant information corresponding to the third preamble information in the message 2, wherein the second condition includes: The third preamble information is the fourth preamble information; wherein the fourth preamble information is the detected preamble information; Among them, the first communication node includes a relay node, the second communication node includes a base station, and the third communication node includes a terminal.

19. A random access device, characterized in that: Configured at the second communication node, comprising: A receiving module, configured to receive a message 3 sent by a first communication node; An access module, configured to complete random access of a third communication node based on the message 3; The device further includes a message 2 sending module, configured to: send message 2, wherein the message 2 includes third timing advance information and corresponding third preamble information; when controlling the first communication node to detect the message 3 sent by the third communication node according to the scheduling information of the message 3 indicated by the fifth uplink grant information corresponding to the third preamble information in the message 2, the message 2 satisfies the second condition; wherein the second condition includes: The third preamble information is the fourth preamble information; wherein the fourth preamble information is the detected preamble information; Among them, the first communication node includes a relay node, the second communication node includes a base station, and the third communication node includes a terminal.

20. A first communication node, characterized in that: include: one or more processors; A storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method according to any one of claims 1 to 9 or implement the method according to any one of claims 11 to 14.

21. A second communication node, characterized in that: include: one or more processors; A storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method as claimed in claim 10 or the method as claimed in claim 15 .

22. A storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 15 is implemented.

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