CN111107568A

CN111107568A - Multi-hop relay distributed networking method, system, equipment and storage medium

Info

Publication number: CN111107568A
Application number: CN201811246789.3A
Authority: CN
Inventors: 江森; 熊兵; 佟学俭
Original assignee: Chengdu TD Tech Ltd
Current assignee: Chengdu TD Tech Ltd
Priority date: 2018-10-25
Filing date: 2018-10-25
Publication date: 2020-05-05
Anticipated expiration: 2038-10-25
Also published as: CN111107568B

Abstract

The invention provides a distributed networking method, a distributed networking system, distributed networking equipment and a storage medium for multi-hop relay. The method is applied to a distributed network and comprises the following steps: a plurality of LTE system nodes, comprising: the method comprises the following steps that the networking management equipment, the routing exchange equipment, a return terminal, a base station, core network equipment and time service equipment are adopted, and the method comprises the following steps: if the first node searches for at least one second node, the networking management device of the first node determines a superior node of the first node according to the acquired system related information and indicates the return terminal to access a cell of the superior node so as to access a distributed network to which the superior node belongs; if the first node does not search the second node and the time service equipment of the first node acquires the timing information, the networking management equipment of the first node controls the base station to start the cell of the first node according to the clock provided by the time service equipment, and a distributed network with the node as a root node is established. The embodiment of the invention realizes the distributed networking of a plurality of LTE system nodes.

Description

Multi-hop relay distributed networking method, system, equipment and storage medium

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a distributed networking method, system, device, and storage medium for multi-hop relay.

Background

In order to improve coverage, improve cell edge throughput and perform temporary network deployment, a Relay (Relay) technology is proposed in Long term evolution-Advanced (LTE-a). As shown in fig. 1, a Relay network architecture in the prior art is that a Relay Node (RN) is added between a User Equipment (UE) and a base station (Evolved NodeB, eNodeB) based on an original network architecture, where the UE and the RN and the eNodeB are both wirelessly connected, the UE accesses the RN through a Uu interface, and the RN accesses the eNodeB through a Un interface. In general, in a relay network architecture, an original base station eNodeB is referred to as a donor base station (DeNB). In the process of data transmission in the relay network, downlink data first reaches the DeNB from a Core network (Evolved Packet Core, EPC), and then is transmitted to the RN, and the RN is transmitted to the UE; the reverse is true for the uplink process.

On the basis of the single-stage relay, the multi-hop relay can be supported in an extensible manner, as shown in fig. 2, in a multi-hop relay scenario, a relay node RN undertakes data transmission of a Uu port, an nth hop Un (N) port, and an N-1 st hop Un (N-1) port, wherein the RN accesses to a UE through the Uu port, receives data of a previous hop Un port through the Un (N) port, and transmits data of the Uu port or the previous hop Un port to a next hop DeNB through the Un (N-1).

In emergency communication, a plurality of independent LTE systems (such as communication vehicles or portable communication boxes) are temporarily networked for use, and each LTE system has its own application system, core network and base station. Therefore, it is highly desirable for those skilled in the art to implement a networking method, so that these independent LTE systems can be networked and realize cooperative work in the emergency frequency range.

Disclosure of Invention

The invention provides a distributed networking method, a distributed networking system, distributed networking equipment and a storage medium for multi-hop relay, and aims to realize distributed networking of a plurality of LTE system nodes.

In a first aspect, the present invention provides a distributed networking method for multihop relay, which is applied to a distributed network, where the distributed network includes: a plurality of LTE system nodes, the LTE system nodes comprising: the method comprises the following steps that the networking management equipment, a return terminal, a base station, core network equipment and time service equipment are adopted, and the method comprises the following steps:

if the first node searches for at least one second node meeting a preset condition within a preset time, the networking management equipment of the first node determines a superior node of the first node from at least one second node according to the acquired system related information of the at least one second node, and indicates a return terminal to access a cell of the superior node so as to access a distributed network to which the superior node belongs; the first node is an LTE system node to be accessed into the distributed network; the second node is an LTE system node in the distributed network;

if the first node does not search a second node meeting a preset condition within a preset time length and the time service equipment of the first node acquires timing information, the networking management equipment of the first node controls a base station to start a cell of the first node according to a clock provided by the time service equipment, and a distributed network with the first node as a root node is established.

Optionally, the system-related information of each second node includes: the relay level number of the second node, the level of a root node to which the second node belongs, the starting time of the root node and Reference Signal Received Power (RSRP) information.

Optionally, if the time service device of the first node cannot acquire timing information, the determining, by the networking management device of the first node, a superior node of the first node from at least one second node according to the acquired system information of the at least one second node includes:

the networking management equipment of the first node selects a second node in the distributed network with the highest level of the attributive root node from at least one second node as a candidate node;

and the networking management equipment of the first node selects a second node with RSRP larger than a preset threshold value and the lowest relay level number from the candidate nodes as the superior node.

Optionally, if the time service device of the first node cannot acquire timing information and there is no candidate node whose RSRP is greater than a preset threshold, the networking management device of the first node determines, according to the acquired system information of at least one second node, a superior node of the first node from the at least one second node, including:

and the networking management equipment of the first node selects a second node with the strongest RSRP from the candidate nodes as the superior node.

Optionally, the selecting, by the networking management device of the first node, a second node in the distributed network with a highest level of the affiliated root node from at least one second node as a candidate node includes:

and if the number of the root nodes with the highest level is at least two, the networking management equipment of the first node selects a second node in the distributed network of the root node with the earliest startup time as a candidate node.

Optionally, if the time service device of the first node has acquired timing information, the networking management device of the first node determines, according to the acquired system information of at least one second node, a superior node of the first node from the at least one second node, including:

the networking management equipment of the first node selects a root node which is higher in the level of the attributive root node than the level of the first node or is the same as the level of the first node and is earlier than the boot time of the first node from at least one second node, and takes the second node in the distributed network of the root node as a candidate node;

Optionally, if the timing service device of the first node has acquired timing information and there is no candidate node whose RSRP is greater than a preset threshold, the networking management device of the first node determines, according to the acquired system information of at least one second node, a superior node of the first node from the at least one second node, including:

Optionally, after the control base station of the networking management device of the first node starts the cell of the first node according to the clock provided by the time service device, the method further includes:

the networking management equipment of the first node sets the relay level number of the first node to zero level;

the base station of the first node broadcasts the identification ID, the relay number and the starting-up time of the first node through a system message; and the identification ID of the first node is used as the ID of the root node.

Optionally, after the indicating the backhaul terminal accesses the cell of the upper node, the method further includes:

and the return terminal of the first node acquires timing information from an air interface and establishes a layer2 tunnel with the core network equipment of the superior node, wherein the layer2 tunnel is used for transmitting an Ethernet Media Access Control (MAC) message.

the networking management equipment of the first node registers to the networking management equipment of a root node to which the superior node belongs through the layer2 tunnel, and reports the measured system information of the superior node and other second nodes to the networking management equipment of the root node; the system information comprises node ID and RSRP.

the method comprises the steps that a networking management device of a root node determines an eNodeB subframe use mode and adjacent cell parameter configuration of a superior node of the first node and relay mode and parameter configuration information of the first node according to system information of the superior node and peripheral second nodes reported by the first node and locally stored relay mode and topology information of other nodes belonging to the root node, and the system information and the relay mode and the topology information are respectively issued to the networking management device of the superior node and the networking management device of the first node through a layer2 tunnel;

the relay mode comprises an eNodeB subframe use mode and a central frequency point;

the parameter configuration information comprises PCID, same frequency and different frequency adjacent region parameters.

the networking management equipment of the first node receives the relay mode and the parameter configuration information of the first node, which are sent by a root node to which the superior node belongs;

the networking management equipment of the superior node of the first node receives the relay mode and the parameter configuration information sent by the root node to which the superior node belongs, and controls the base station of the superior node to modify the configuration according to the relay mode and the parameter configuration information;

and after detecting that the backhaul terminal of the first node enters an in-band relay mode, the networking management device of the first node instructs the base station of the first node to start a local cell by using a timing signal provided by the backhaul terminal and relay mode and parameter configuration information sent by the root node.

Optionally, the method further includes:

after the first node is established in the local cell, the networking management device of the first node controls a return terminal to periodically collect system information of surrounding second nodes, and determines whether a root node with a higher level than a root node to which the first node belongs exists or not, or the root node with the same level as the root node to which the first node belongs and with a higher start-up time than the root node to which the first node belongs exists;

if so, the networking management device of the first node reports the collected system information of the second node to the attributive root node, so that the attributive root node regenerates the distributed network according to the system information reported by the first node.

In a second aspect, the present invention provides a distributed networking system for multihop relay, which is applied to a distributed network, and includes: a plurality of LTE system nodes, the LTE system nodes comprising: the system comprises networking management equipment, a return terminal, a base station, core network equipment and time service equipment;

the networking management device of the first node is configured to determine a superior node of the first node from at least one second node according to the acquired system-related information of the at least one second node if the first node searches for the at least one second node meeting a preset condition within a preset time length, and instruct a backhaul terminal to access a cell of the superior node so as to access a distributed network to which the superior node belongs; the first node is an LTE system node to be accessed into the distributed network; the second node is an LTE system node in the distributed network;

the networking management equipment of the first node is further configured to control a base station to start a cell of the first node according to a clock provided by the time service equipment if the first node does not search for a second node meeting a preset condition within a preset time length and the time service equipment of the first node has acquired timing information, and establish a distributed network in which the first node is a root node.

In a third aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the computer program implements the method described in any one of the first aspect.

In a fourth aspect, an embodiment of the present invention provides an electronic device, including:

a processor; and

a memory for storing executable instructions of the processor;

wherein the processor is configured to perform the method of any of the first aspects via execution of the executable instructions.

In the distributed networking method, system, device and storage medium for multi-hop relay provided in the embodiments of the present invention, if the first node searches for at least one second node that meets a preset condition within a preset time period, the networking management device of the first node determines a superordinate node of the first node from the at least one second node according to the acquired system-related information of the at least one second node, and instructs a backhaul terminal to access a cell of the superordinate node to access a distributed network to which the superordinate node belongs; the first node is an LTE system node to be accessed into the distributed network; the second node is an LTE system node in the distributed network; if the first node does not search a second node meeting the preset condition within the preset time length and the timing device of the first node acquires the timing information, the networking management device of the first node controls the base station to start the cell of the first node according to the clock provided by the timing device, and a distributed network with the first node as a root node is established, so that networking of a plurality of independent LTE system nodes is realized, and cooperative work is realized.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram of a conventional single-stage relay network architecture;

fig. 2 is a schematic diagram of a conventional multi-hop relay network architecture;

fig. 3 is a schematic architecture diagram of a distributed network of multihop relay provided by the present invention;

fig. 4 is a flowchart illustrating a distributed networking method of multihop relay according to an embodiment of the present invention;

fig. 5 is a flowchart illustrating a distributed networking method for multihop relay according to another embodiment of the present invention;

fig. 6 is a schematic structural diagram of an embodiment of an electronic device provided in the present invention.

With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terms "comprising" and "having," and any variations thereof, in the description and claims of this invention and the drawings described herein are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Firstly, the application scene related to the invention is introduced:

in the related art, a relay scheme is a centralized tree network no matter in single hop or multi-hop, and service traffic under all RNs and denbs firstly returns to a core network serving as a root node and then reaches the RNs and denbs where target terminals are located along a topology tree. The return link of the in-band relay shares an air interface bandwidth with the access link, the bandwidth which can be provided by the return link is limited, the return bandwidth is smaller after multi-hop relay, and the single-center tree structure causes the overload of the return link.

Therefore, an embodiment of the present invention provides a distributed networking method for multihop relay, which is applied to a distributed network, where the distributed network includes: a plurality of LTE system nodes, as shown in fig. 3, the LTE system nodes include: the system comprises an application server, networking management equipment, route switching equipment, a return terminal (RRN), a base station eNodeB, core network EPC equipment and time service equipment. And a plurality of LTE system nodes communicate with each other through a wireless network.

The base station is used for providing coverage of an LTE omnidirectional or a plurality of directional cells, is used for local common terminal (namely UE) access and RRN relay access, and supports TDD in-band relay air interface protocol defined in LTE-A standard and relay configuration and scheduling of RRN.

Besides providing the functions of the LTE standard core network, the core network supports UE access, authentication and roaming, establishes a Layer 2(Layer2, L2) relay tunnel with the RRN accessing the core network for transmitting IEEE 802.3MAC Layer messages (ethernet), and provides corresponding QoS guarantees.

The RRN is used for accessing an upper-level eNodeB and is attached to an upper-level EPC, and the EPC can identify the RRN, establish an L2 transmission tunnel and an Evolved Packet System (EPS) bearer thereof with the RRN, and is used for the message intercommunication of an IEEE 802.3MAC layer between an upper-level LTE System and a lower-level LTE System and guarantee QoS. The RRN requests the upper eNodeB to enter an in-band relay mode under the control of the node networking management device, may acquire air interface timing from an accessed cell, and provides the air interface timing to the local base station in a 1588V2 clock source manner.

The networking management equipment is responsible for controlling networking configuration, monitoring and reporting networking conditions among the LTE system nodes, the networking management equipment periodically acquires information of peripheral LTE system nodes from the RRN and reports the information to the networking management equipment of the root node, the networking management equipment of the root node makes a judgment after gathering and processing, a configuration instruction is issued to the networking management equipment, and each node networking equipment controls a local eNodeB to adjust.

The route switching equipment realizes the switching function of two-layer and three-layer packet messages of a common switch and a router.

The application server is similar to an IP Multimedia Subsystem (IMS), provides service services for the local terminal and the roaming terminal, and also supports interworking with application servers of other LTE system nodes.

Node IDs are configured in advance for each LTE system node through networking management equipment, grades and IP addresses are configured according to administrative levels or system types (a command communication vehicle system, an emergency communication vehicle system, a movable communication system and the like), and corresponding information of other LTE system nodes in the distributed network is stored. The networking management equipment can configure and control the local eNodeB and the RRN through the instruction, and communicate with the networking management equipment of other networked LTE system nodes.

The key information of each LTE system node needs to be broadcasted by the local eNodeB through an air interface system message, so that the key information of the LTE system node can be detected under the condition that the surrounding LTE system nodes are not accessed to the LTE system node, and the key information is used for selecting a proper upper node and collecting the adjacency relation.

Each LTE system node is provided with respective core network equipment and an application server, and local services are directly processed in the node, so that the problem of overload of a return link is avoided.

The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

Fig. 4 is a flowchart illustrating a distributed networking method for multihop relay according to an embodiment of the present invention. As shown in fig. 4, the method provided by this embodiment includes:

step 101, if the first node searches for at least one second node meeting a preset condition within a preset time, the networking management device of the first node determines a superior node of the first node from at least one second node according to the acquired system related information of the at least one second node, and instructs a backhaul terminal to access a cell of the superior node so as to access a distributed network to which the superior node belongs; the first node is an LTE system node to be accessed into the distributed network; the second node is an LTE system node in the distributed network.

Specifically, the first node is a new node to be accessed to the distributed network, the second node is a node already accessed to the distributed network, and the first node is located within a coverage area of a base station of the second node, for example, a distance from the first node is a preset distance.

After the LTE System is powered on, the local networking management device (i.e., the networking management device of the first node) controls the RRN to initially search for LTE System nodes, and the RRN collects System Information (MIB), (SIB 1, SIB1, or RSRP) and Reference Signal Receiving Power (RSRP) Information of each LTE System node on each designated frequency point, and reports the Information to the local networking management device. The designated frequency point is, for example, a central frequency point of the emergency frequency band, and assuming that the emergency frequency band has a bandwidth of 3 × 20Mhz, the designated frequency point may be divided into three non-overlapping 20Mhz bandwidth carriers whose central frequency points are f1, f2, and f3, respectively.

Where MIB and SIB1 information is sent every 80 ms. During which it is repeatedly transmitted 4 times with different RV versions.

The networking management equipment acquires system related information from the information collected by the RRN, wherein the system related information comprises the relay grade of a second node, the grade of a root node to which the second node belongs, the starting time of the root node and Reference Signal Received Power (RSRP) information. Wherein, can also include: and the center frequency point of the second node.

The networking management equipment determines a superior node of the first node from the plurality of second nodes and indicates the backhaul terminal of the first node to access the cell of the superior node.

The Spare field (10 bits) of the MIB and the cell ID (28 bits) of the SIB1 carry the above-mentioned system-related information.

Suppose that the distributed network can support 128 LTE system nodes (7 bit), 8-level 7-hop (3 bit), and power-on time (14 bit) at maximum

Table 1 MIB structure

MIB Spare(0～6)	MIB(7～9)
		ID of root node	Number of stages

TABLE 2 SIB1 structure

Step 102, if the first node does not search a second node meeting a preset condition within a preset time length and the time service equipment of the first node acquires timing information, the networking management equipment of the first node controls a base station to start a cell of the first node according to a clock provided by the time service equipment, and a distributed network with the first node as a root node is established.

Optionally, after step 102, the method further includes:

and the base station of the first node broadcasts the identification ID, the relay number and the starting-up time of the first node through system information.

Specifically, if a second node meeting a preset condition is not searched within a preset time (for example, one minute) and the local time service device is locked and timed, that is, timing information is acquired, the local networking management device controls the eNodeB to start a local cell by using a clock provided by the local time service device, the frequency point of the local cell is different from that of an adjacent cell as much as possible, the local networking management device sets the relay stage number of the first node to 0, sets the ID of the affiliated root node to the ID of the first node, that is, sets the first node to itself as the root node, sets the level of the root node to the level of the first node, and the eNodeB broadcasts the identification ID, the relay stage number, and the start-up time of the first node in a system message.

And if the local time service equipment cannot lock the timing, the local cell is not started, and the RRN continues to search the surrounding LTE system nodes.

When the root node does not have a subordinate node, no air interface subframe is reserved for relay resources, and all resources are used for accessing the common terminal.

In this embodiment, the in-band relay technology of LTE is used to implement the same-frequency or different-frequency networking and interworking of the distributed LTE system nodes, and on this basis, the interworking of the application services of the nodes is implemented.

In the method of this embodiment, if the first node searches for at least one second node that meets a preset condition within a preset time, the networking management device of the first node determines a superior node of the first node from the at least one second node according to the acquired system-related information of the at least one second node, and instructs a backhaul terminal to access a cell of the superior node to access a distributed network to which the superior node belongs; the first node is an LTE system node to be accessed into the distributed network; the second node is an LTE system node in the distributed network; if the first node does not search a second node meeting the preset condition within the preset time length and the timing device of the first node acquires the timing information, the networking management device of the first node controls the base station to start the cell of the first node according to the clock provided by the timing device, and a distributed network with the first node as a root node is established, so that networking of a plurality of independent LTE system nodes is realized, and cooperative work is realized.

On the basis of the foregoing embodiment, optionally, if a plurality of second nodes are searched, and the time service device of the first node cannot acquire the timing information, in step 101, the upper node of the first node is determined from at least one of the second nodes, which may be specifically implemented in the following two ways:

the first mode is as follows:

Specifically, the networking management device of the first node preferentially selects a root node with the highest level, and takes a plurality of second nodes in the distributed network where the root node is located as candidate nodes.

And selecting a second node with the RSRP larger than a preset threshold value and the lowest relay level number from the candidate nodes as a superior node of the first node. And the networking management equipment indicates the backhaul terminal of the first node to access the cell of the superior node.

Further, if no upper node is selected in the first manner, if no candidate node with RSRP greater than the preset threshold exists, the second manner is adopted:

Specifically, a plurality of candidate nodes are selected by using the method in the first mode, and then if there is no second node with RSRP greater than a preset threshold, the second node with the strongest RSRP signal among the candidate nodes is selected as a superior node. And the networking management equipment indicates the backhaul terminal of the first node to access the cell of the superior node.

Further, if the number of the root nodes with the highest level is at least two, the networking management device of the first node selects the second node in the distributed network of the root node with the earliest startup time as a candidate node.

Specifically, if the number of the root nodes with the highest level is large, a plurality of second nodes in the distributed network of the root nodes with the final boot-up time are selected as candidate nodes.

On the basis of the foregoing embodiment, optionally, if a plurality of second nodes are searched, and the time service device of the first node locks the timing, that is, acquires the timing information, in step 101, the upper node of the first node is determined from at least one of the second nodes, which may be specifically implemented in the following two ways:

the first mode is as follows:

the networking management equipment of the first node selects a root node which is higher than the grade of a root node to which the first node belongs from at least one second node, or the root node which is the same as the grade of the root node to which the first node belongs and is earlier than the starting time of the root node to which the first node belongs, and takes the second node in the distributed network of the root node as a candidate node;

Specifically, the networking management device of the first node preferentially selects a root node with a higher level than a root node to which the first node belongs, and takes a plurality of second nodes in a distributed network where the root node is located as candidate nodes;

or under the condition that no root node with the grade higher than that of the root node to which the first node belongs exists, selecting the root node with the grade same as that of the root node to which the first node belongs and the starting time earlier than that of the root node to which the first node belongs, and taking a plurality of second nodes in the distributed network of the root node as candidate nodes;

if the number of the root nodes with higher grades is more than 1, selecting the root node with the highest grade; and if the number of the root nodes with earlier boot-up time is more than 1, selecting the root node with the earliest boot-up time.

And then, selecting a second node with the RSRP larger than a preset threshold value and the lowest relay level number from the plurality of candidate nodes as an upper node of the first node. And the networking management equipment indicates the backhaul terminal of the first node to access the cell of the superior node.

On the basis of the foregoing embodiment, optionally, after the backhaul terminal accesses the cell of the upper node, the method further includes:

the backhaul terminal of the first node acquires timing information from an air interface, and establishes a layer2 tunnel of a data link layer with the core network device of the superior node, where the layer2 tunnel is used to transmit an ethernet media access control MAC packet.

Further, after the backhaul terminal accesses the cell of the upper node, the method further includes:

Specifically, after the RRN accesses a cell of a superior node, the RRN notifies a first node (i.e., the node) that a networking management device has accessed a network, and the networking management device of the node converts an ID of a root node into an IP address of the root node according to a local database (pre-storing a corresponding relationship between an ID and an IP address of an LTE system node), that is, obtains the IP address of the root node according to the ID of the root node, registers the IP address with the networking management device of the root node, and reports information such as IDs and RSRP of the superior node and other surrounding second nodes to the networking management device of the root node. The other surrounding second nodes may be second nodes within a preset range of the first node.

The networking management equipment of the root node issues an eNodeB subframe use mode and adjacent cell parameter configuration of the superior node to the networking management equipment of the superior node through a layer2 tunnel, and issues a relay mode and parameter configuration information of the first node to the networking management equipment of the first node.

Optionally, after the backhaul terminal accesses the cell of the upper node, the method further includes:

Specifically, the networking management device of the root node generates a subframe usage mode of a higher-level node eNodeB of a newly accessed first node (if a current relay mode needs to be modified or activated) according to the reported information and in combination with information reported by other nodes of the distributed network in which the root node is located, and issues the relay subframe mode to the networking management device of the higher-level node, and allocates a relay mode corresponding to the newly accessed first node and some parameter configurations (for example, including a Physical-Layer Cell Identity (PCID), co-frequency and inter-frequency parameters, etc.) of the local Cell of the newly accessed first node to the networking management device of the newly accessed first node at the same time.

Before the Un subframe configuration of the superior node eNodeB is activated, the RRN of the first node is accessed to the superior node in a common terminal mode, after the Un subframe configuration of the superior node eNodeB is activated, the RRN of the first node is reconnected to the superior node in an in-band relay mode, the Un subframe configuration mode of the superior node is obtained through RRC signaling, and the networking management equipment of the first node is reported. And after the networking management equipment of the first node checks that the Un subframe mode does not conflict with the eNodeB subframe use mode of the relay mode issued by the root node to the first node, indicating the base station of the first node to start the local cell by using the timing signal provided by the backhaul terminal and the parameter configuration information sent by the root node.

The relay mode is formed by combining a subframe usage mode and a center frequency point of an eNodeB. The subframe usage pattern of the eNodeB evolves through the in-band relay Un subframe configuration pattern of the 3GPP LTE-a standard. (since only single hop relay is considered when LTE-A in-band relay design)

Table 3 below shows a configuration mode for the TDD LTE inband relay Un subframes in the 3GPP standard. The present embodiment uses only relay subframe patterns 0, 1 and 4.

TABLE 3

Table 4 below shows the Un subframe configuration patterns 0, 1, 4, and the node eNodeB subframe usage pattern without correlation, D shows the downlink subframe of the local Uu, U shows the uplink subframe of the local Uu, X shows the downlink subframe of the Un link that communicates with the upper node, Y shows the uplink subframe of the Un link that communicates with the upper node, R shows the uplink subframe of the Un link that communicates with the lower node, and T shows the downlink subframe of the Un link that communicates with the lower node. The subframe usage modes 0 and 2 are used for a scene that only an upper node has no lower node, the modes 1 and 3 are used for a scene that the upper node has the lower node, the mode 5 is a scene that the current node is a root node and only a first-level lower node, the mode 4 is a scene that the upper node is the root node and has no lower node, and the mode 6 is a scene that the current node is the root node and has no lower node.

TABLE 4

Table 5 below shows the matching relationship between the eNodeB subframes of the upper node and the current node (i.e., the first node).

TABLE 5

When only one level of subordinate node is under the root node, the root node provides the relay service for the subordinate node by adopting an eNodeB subframe using mode 5. When the node exceeds the first-level subordinate node, the root node provides the relay service for the subordinate node by adopting an eNodeB subframe use mode 1 or 3, and the eNodeB subframe use mode distributed to the newly accessed first node and the eNodeB subframe use mode of the superior node meet the requirement of a table 5. The frequency point allocated for the newly accessed first node is different from the frequency point of the upper level, and the frequency point is ensured to be different from the adjacent node with strong signal as much as possible. The PCID should differ as much as possible from the PCID of an adjacent co-frequency node modulo 3.

And the local networking equipment of the superior node informs the local eNodeB of the superior node of using the relay subframe mode reconfiguration configured by the root node and scheduling the newly accessed RRN.

And after detecting that the reconfiguration of the local RRN of the first node is completed, the local networking management equipment of the newly accessed first node also informs the local eNodeB to start the local cell by using the timing signal provided by the RRN and the configuration information of the root node.

In this embodiment, the first node registers with a root node of a distributed network to which a higher node belongs, receives allocation and configuration of a relay mode thereof, and becomes one node of the distributed network.

In the embodiment, the relay mode is expanded by using a method combining time division and frequency division to support the distributed networking of multi-hop relay, and meanwhile, the different-frequency networking is realized, and the same-frequency interference is reduced.

On the basis of the foregoing embodiment, optionally, as shown in fig. 5, the method of this embodiment further includes:

103, after the first node is established in the local cell, the networking management device of the first node controls a backhaul terminal to periodically collect system information of peripheral second nodes, and determines whether a root node with a higher level than a root node to which the first node belongs exists, or a root node with a level the same as the root node to which the first node belongs and with a time to start the root node earlier than the root node to which the first node belongs exists;

and 104, if so, reporting the collected system information of the second node to the attributive root node by the networking management equipment of the first node, so that the attributive root node regenerates the distributed network according to the system information reported by the first node.

Specifically, after the distributed network is established, the topology structure of the distributed network may be a plurality of independent topology trees due to different power-on time of each LTE system node. Therefore, after the backhaul terminal RRN of the first node finishes accessing the distributed network, it still scans the MIB and SIB1 information of other LTE system nodes eNodeB around the n frequency points with n × 4096 radio frames as a period. Wherein n may be the number of center frequency points in the frequency band. During scanning, the local eNodeB stops sending information at the air interface in order to avoid local cell interference. The scanning window position of each period is randomly selected according to 40ms as an interval (or a scanning window which is completely unrepeated by a fully distributed network is generated according to the node ID of the LTE system), and the window width is 10ms (1 wireless frame). And the RRN reports the scanned frequency point, MIB spare and SIB1Cell ID to local networking management equipment, and when the local networking management equipment solves that a new root node with higher level or equal level but earlier startup time exists nearby, the RRN reports the information of other scanned LTE system nodes to the networking management equipment of the root node to which the first node belongs. And the root node generates an adjacency list of each LTE system node according to the information.

When a root node finds that a distributed network with a root node higher than the own level or equal to the own level but earlier in startup time exists nearby, a first node reporting the information is used as a root by combining an adjacency list to generate a topology tree, a configuration signaling is generated according to a new topology tree or a configuration instruction for specifying the root node needing to be accessed to the network is simply generated and sent to networking management equipment of each LTE system node of the topology tree, and each LTE system node is enabled to search and access a new upper node according to the configuration instruction under the control of the networking management equipment of each LTE system node.

Further, the RRN provides layer2 tunnels to the upper nodes, so these layer2 tunnels are connected by the switch on each LTE system node to form a natural tree structure without loops. Point-to-point path discovery can be achieved through ARP protocol, layer2 broadcast, and port learning functions.

The embodiment of the invention also provides a distributed networking system of multi-hop relay, which is applied to a distributed network, and the system comprises: a plurality of LTE system nodes, the LTE system nodes comprising: the system comprises an application server, networking management equipment, route switching equipment, a return terminal, a base station, core network equipment and time service equipment;

the networking management equipment of the first node is further configured to control a base station to start a cell of the first node according to a clock provided by the time service equipment if the first node does not search for a second node meeting a preset condition within a preset time length and the time service equipment of the first node has acquired timing information, so as to establish a distributed network with the first node as a root node.

Optionally, if the time service device of the first node cannot acquire the timing information, the networking management device of the first node is specifically configured to:

selecting a second node in the distributed network with the highest grade of the attributive root node from at least one second node as a candidate node;

and selecting a second node with the RSRP larger than a preset threshold value and the lowest relay level number from the candidate nodes as the superior node.

Optionally, if the time service device of the first node cannot acquire timing information and there is no candidate node whose RSRP is greater than a preset threshold, the networking management device of the first node is specifically configured to:

and selecting a second node with the strongest RSRP from the candidate nodes as the superior node.

Optionally, the networking management device of the first node is specifically configured to:

and if the number of the root nodes with the highest grade is at least two, selecting the second node in the distributed network of the root node with the earliest startup time from at least two as a candidate node.

Optionally, if the time service device of the first node has acquired the timing information, the networking management device of the first node is specifically configured to:

selecting a root node which is higher in the level of the home root node than the level of the first node or is the same as the level of the first node and is earlier than the boot time of the first node from at least one second node, and taking the second node in the distributed network of the root node as a candidate node;

Optionally, if the timing service device of the first node has acquired timing information and there is no candidate node whose RSRP is greater than a preset threshold, the networking management device of the first node is specifically configured to:

Optionally, the networking management device of the first node is further configured to:

after the networking management equipment control base station of the first node starts the cell of the first node according to the clock provided by the time service equipment, setting the relay level number of the first node to zero level;

and the base station of the first node is used for broadcasting the identification ID, the relay number and the starting-up time of the first node through system information.

Optionally, after the indication backhaul terminal accesses the cell of the upper node, the networking management device of the first node is further configured to:

registering to the networking management equipment of the root node to which the superior node belongs through the layer2 tunnel, and reporting the measured system information of the superior node and other second nodes to the networking management equipment of the root node; the system information comprises node ID and RSRP.

Optionally, after the networking management device of the first node instructs the backhaul terminal to access the cell of the upper node, the networking management device of the first node is further configured to:

according to system information of a superior node and a peripheral second node reported by a first node and relay mode and topology information of other nodes which are locally stored and belong to the root node, determining an eNodeB subframe use mode and adjacent cell configuration of the superior node of the first node and relay mode and parameter configuration information of the first node, and respectively issuing the eNodeB subframe use mode and adjacent cell configuration information and the relay mode and parameter configuration information of the first node to networking management equipment of the superior node and the first node through a layer2 tunnel;

the relay mode is formed by combining an eNodeB subframe use mode and a central frequency point;

the parameter configuration comprises a PCID and adjacent parameters of same frequency and different frequency.

receiving relay mode and parameter configuration information of the first node, which is sent by a root node to which the superior node belongs;

the networking management equipment of the superior node of the first node is also used for receiving the relay mode and the parameter configuration information sent by the root node to which the superior node belongs and controlling the base station of the superior node to modify the configuration according to the relay mode and the parameter configuration information;

the networking management device of the first node is further configured to instruct the base station of the first node to start the local cell by using the timing signal provided by the backhaul terminal and the relay mode and parameter configuration information sent by the root node after detecting that the backhaul terminal of the first node enters the in-band relay mode.

Optionally, the method further includes:

after the first node is established in the local cell, the networking management device of the first node is used for controlling a backhaul terminal to periodically collect system information of peripheral second nodes and determining whether a root node with a higher level than a root node to which the first node belongs exists or whether the root node with the same level as the root node to which the first node belongs and with a higher boot time than the root node to which the first node belongs exists;

and if so, the networking management device of the first node is used for reporting the collected system information of the second node to the attributive root node so that the attributive root node regenerates the distributed network according to the system information reported by the first node.

The system of this embodiment may be configured to implement the technical solutions of the method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.

Fig. 6 is a structural diagram of an embodiment of an electronic device provided in the present invention, and as shown in fig. 6, the electronic device includes:

a processor 601, and a memory 602 for storing executable instructions for the processor 601.

Optionally, the method may further include: a communication interface 603 for communicating with other devices.

The above components may communicate over one or more buses.

The processor 601 is configured to execute the corresponding method in the foregoing method embodiment by executing the executable instruction, and the specific implementation process thereof may refer to the foregoing method embodiment, which is not described herein again.

The electronic device may be an electronic device corresponding to an LTE system node.

The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the method in the foregoing method embodiment is implemented.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A distributed networking method of multi-hop relay is applied to a distributed network, and the distributed network comprises the following steps: a plurality of LTE system nodes, the LTE system nodes comprising: the method comprises the following steps that the networking management equipment, a return terminal, a base station, core network equipment and time service equipment are adopted, and the method comprises the following steps:

2. The method of claim 1, wherein the system-related information of each of the second nodes comprises: the relay level number of the second node, the level of a root node to which the second node belongs, the starting time of the root node and Reference Signal Received Power (RSRP) information.

3. The method according to claim 2, wherein if the time service device of the first node cannot acquire timing information, the determining, by the networking management device of the first node, a higher-level node of the first node from at least one second node according to the acquired system information of the at least one second node includes:

4. The method according to claim 3, wherein if the time service device of the first node cannot acquire timing information and there is no candidate node whose RSRP is greater than a preset threshold, the networking management device of the first node determines, according to the acquired system information of at least one second node, an upper node of the first node from the at least one second node, including:

5. The method according to claim 3 or 4, wherein the selecting, by the networking management device of the first node, the second node in the distributed network with the highest level of the home root node from the at least one second node as the candidate node comprises:

6. The method according to claim 2, wherein if the time service device of the first node has acquired timing information, the networking management device of the first node determines a superior node of the first node from at least one second node according to the acquired system information of the at least one second node, including:

7. The method according to claim 6, wherein if the timing service device of the first node has acquired timing information and there is no candidate node whose RSRP is greater than a preset threshold, the networking management device of the first node determines, according to the acquired system information of at least one second node, an upper node of the first node from the at least one second node, including:

8. The method according to any one of claims 1 to 4, wherein after the control base station of the networking management device of the first node starts the cell of the first node according to the clock provided by the time service device, the method further comprises:

9. The method according to any of claims 1-4, wherein after instructing the backhaul terminal to access the cell of the superordinate node, further comprising:

10. The method according to claim 9, wherein after instructing the backhaul terminal to access the cell of the superordinate node, further comprising:

11. The method according to claim 10, wherein after instructing the backhaul terminal to access the cell of the superordinate node, further comprising:

12. The method according to claim 11, wherein after instructing the backhaul terminal to access the cell of the superordinate node, further comprising:

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

14. A distributed networking system of multi-hop relay, applied to a distributed network, the system comprising: a plurality of LTE system nodes, the LTE system nodes comprising: the system comprises networking management equipment, a return terminal, a base station, core network equipment and time service equipment;

the network management device of the first node is used for determining a superior node of the first node from at least one second node according to the acquired system related information of the at least one second node if the first node searches for the at least one second node meeting a preset condition within a preset time length, and indicating a backhaul terminal to access a cell of the superior node so as to access a distributed network to which the superior node belongs; the first node is an LTE system node to be accessed into the distributed network; the second node is an LTE system node in the distributed network;

15. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method of any one of claims 1-13.

16. An electronic device, comprising:

a processor; and

a memory for storing executable instructions of the processor;

wherein the processor is configured to perform the method of any of claims 1-13 via execution of the executable instructions.