CN115665691A - Offshore wireless backhaul networking system and method based on information perception - Google Patents
Offshore wireless backhaul networking system and method based on information perception Download PDFInfo
- Publication number
- CN115665691A CN115665691A CN202211096666.2A CN202211096666A CN115665691A CN 115665691 A CN115665691 A CN 115665691A CN 202211096666 A CN202211096666 A CN 202211096666A CN 115665691 A CN115665691 A CN 115665691A
- Authority
- CN
- China
- Prior art keywords
- node
- information
- control
- data
- resources
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses an information perception-based offshore wireless backhaul networking system and method, which can improve the distance of ship data return in a multi-hop transmission mode and avoid the problem of communication link interruption caused by interference nodes and low-energy nodes participating in data return. A hierarchical network architecture is adopted, the first sub-network is a main ship multi-hop return sub-network, and the second sub-network is a sub-ship access sub-network. The distance of ship data return is increased in a multi-hop transmission mode, and meanwhile, the nodes in the second-level subnet are subjected to resource management through the control nodes of the second-level subnet, so that communication resource overhead required by the shore-based base station for resource management is reduced. The back-transmission node selection is carried out through an information perception method (channel perception, interference perception and energy perception) and a designed perception information reporting process, and the problem of communication link interruption caused by the fact that an interfered node and a low-energy node participate in data back transmission is avoided through a perception information reporting mode.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to an offshore wireless backhaul networking system and method based on information perception.
Background
In the conventional marine communication technology, a marine communication system is generally constructed using satellite and land mobile communication technologies. Currently, satellite systems mainly applied in the world include Inmarsat, EPIRB, skynone number and the like, and terrestrial mobile communication technologies include LTE, WIFI, NR, wiMAX and the like. The marine communication system constructed by using the land mobile communication technology generally adopts the mode of combining a shore-based base station and a relay base station or MESH networking to expand the coverage, for example, LR-WiFi technology (Long-Range WiFi) provided by IEEE 802.11 standard in U.S. patent 10,045,227P ].2018-8-7 constructs a wireless Point-to-multipoint communication network (Point-to-Multi Point, P2 MP) in patents of Rao S N, ramesh M V, and Rangan P V. The network comprises a coastal base station and a marine mobile ship, wherein the coastal base station can realize sea area coverage of 45km based on an LR-WIFI technology, further, ships close to each other are divided into groups in the network, each group comprises a ship with Adaptive Backhaul Equipment (ABE), and the ship is called an Adaptive node. The self-adaptive nodes can construct a wireless backhaul link with a shore-based base station through an LR-WIFI technology, and serve as a relay base station to provide an access function for other ships, and the coverage distance of each self-adaptive node is about 15-20km. In the articles Zhou M T, hoang V D, harada H, et al, TRITON: high-speed marked Wireless MESH network [ J ]. IEEE Wireless Communications,2013,20 (5): 134-142, singapore constructs a maritime communication system-TRITON based on MESH networking technology to realize the coverage of 70km at most, the TRITON system adopts WiMAX technology as communication technology among different nodes, and interconnection and data return are realized among maritime communication nodes such as a shore-based base station, a maritime mobile ship, a buoy, an oil platform and the like in an MESH networking mode.
The satellite-based offshore wireless backhaul technology has the problems of high cost, high transmission delay and the like; the maritime communication system based on the land mobile communication technology and the relay base station can expand the coverage distance through the relay base station in the coverage range of the shore-based base station, but due to the fact that the number and the coverage distance of the relay base stations are limited, when the relay base station does not exist nearby the maritime communication node and the shore-based base station cannot be directly accessed, data return cannot be achieved, and a coverage blind area exists; the maritime communication system based on the land mobile communication technology and the MESH networking can utilize all nodes in the network to perform multi-hop transmission, and compared with a relay base station, the coverage distance is further extended, but due to the complex maritime electromagnetic environment, the maritime communication nodes are easily affected by the problems of fading, interference and the like, so that the communication link is interrupted, the limitation of the terrain and equipment is caused, and the normal operation cannot be maintained when the electric quantity of the equipment is too low.
Disclosure of Invention
In view of this, the invention provides an offshore wireless backhaul networking system and method based on information perception, which can improve the distance of ship data backhaul through a multi-hop transmission mode, and avoid the problem of communication link interruption caused by interference nodes and low-energy nodes participating in data backhaul.
In order to achieve the purpose, the technical scheme of the invention is as follows: an offshore wireless backhaul networking system based on information perception comprises a shore-based base station, at least 1 backhaul relay node, at least 1 main ship node and a plurality of slave ship nodes; the nodes are in wireless communication through the millimeter wave link; the system is constructed to obtain a maritime wireless backhaul network.
The shore-based base station node is a 5G macro base station;
the backhaul relay node is a buoy, an offshore platform or other backhaul relay ships, is provided with relay backhaul equipment and completely realizes an NR Sidelink protocol stack;
the main ship node is a 5G relay base station and has the capability of realizing all protocols of the 5G base station and the 5G Sidelink;
the slave ship node serves as a 5G terminal, has a protocol stack function required by the 5G terminal, and is directly connected to the master ship node.
Furthermore, the shore-based base station node is provided with a wireless communication module, a perception information acquisition module and a routing table calculation module, wherein the wireless communication module is used for data transmission between the shore-based base station and the backhaul relay node or the main ship node; the perception information acquisition module is used for acquiring and storing the received perception information periodically uploaded by the relay backhaul node and the main carrier node from the shore-based base station node wireless communication module; the routing table computation module is at a certain time interval T 1 Reading the perception information of all nodes stored in the perception information acquisition module, calculating the routing tables of all the current nodes, generating routing table data packets and transmitting the routing table data packets to the wireless communication module;
the backhaul relay node further comprises a wireless communication module and an information perception module, wherein the wireless communication module is used for data transmission with a shore-based base station, other relay backhaul nodes and a main ship node; the information perception module is used for acquiring the required perception information, generating corresponding information reporting information and submitting the information to the wireless communication module;
the main ship node is provided with a wireless communication module and an information perception module, wherein the wireless communication module is used for data transmission between the main ship node and a slave ship node, a relay return node or a shore-based base station; the information perception module is used for perceiving predefined perception information which needs to be reported to the shore-based base station;
the offshore wireless backhaul network is divided into two stages: the first-level sub-network is a main ship multi-hop return network and comprises a shore-based base station, return relay nodes and main ship nodes, and control nodes of the first-level sub-network are the shore-based base station; the second-level sub-network is a master-slave carrier access network and comprises a master carrier node and slave carrier nodes, and the control node is the master carrier node.
The invention also provides an offshore wireless backhaul networking method based on information perception, and an offshore wireless backhaul networking system adopts the following method to realize information perception:
step1: the control node of the first-level sub-network periodically sends system information broadcast SIB, in which SIB includes Sidelink system configuration supported in 5G standardBesides the information, the method also comprises the following steps: energy perception denial of service threshold lambda, energy perception strategy regulation threshold mu and channel perception power threshold P 1 ；
And 2, step: the control node of the first-level subnet periodically allocates channel sensing information reporting communication resources for non-control nodes in all subnets, and sends downlink control information DCI to the non-control nodes needing sensing information reporting through a downlink control channel PDCCH, the non-control nodes acquire the DCI information by decoding the PDCCH to judge whether the information is transmitted to the non-control nodes, and if so, the non-control nodes further acquire the communication resource related information allocated in the information;
if the non-control node can be directly accessed by the control node, the communication resources comprise uplink control channel (PUCCH) resources, uplink shared channel (PUSCH) resources and starting positions of the resources, wherein the PUCCH is used for bearing Uplink Control Information (UCI) for decoding at the control node, and the PUSCH is used for bearing sensing data;
if the non-control node is judged by the control node to be incapable of being directly accessed, the communication resources comprise side chain control channel (PSCCH) resources, side chain shared channel (PSSCH) resources, uplink control channel (PUCCH) resources, uplink shared channel (PUSCH) resources and starting positions of the resources, wherein the PSCCH is used for bearing side chain control information (SCI) for decoding data among the non-control nodes, the PSSCH is used for bearing sensing data, the PUCCH is used for bearing Uplink Control Information (UCI) for decoding at the control node, and the PUSCH is used for bearing sensing data;
and step 3: after acquiring the sensing information reporting resource information, the non-control node firstly reads the sensing information data stored in the self information sensing module and then transmits the data to the next node on the assigned wireless resource;
and 4, step 4: the control node releases the resources after receiving the sensing data, and returns to the step1 after waiting for the next resource reporting period;
in the offshore wireless backhaul networking system, when data needs to be transmitted back by non-control nodes in each subnet or control nodes of a second-level subnet, the wireless data transmission back is performed by adopting the following steps:
step1: and the control node in the first-level subnet excludes the nodes of the energy danger level and the interfered nodes according to the acquired perception state information, generates a routing table in the subnet according to the HWMP protocol defined in the 802.11s standard, wherein the routing table comprises all non-control nodes and next hop nodes in the subnet, and broadcasts the routing table information to the non-control nodes in the subnet through a broadcast channel PBCH.
Step2: when the non-control nodes in the second-level subnet have data to be transmitted back, the data is transmitted to the control nodes of the second-level subnet through the 5G access process by the second-level subnet, and then is transmitted back to the shore-based base station by the control nodes through the first-level subnet.
Further, in step 3, if the control node determines that the non-control node can directly access, the DCI only includes PUCCH and PUSCH resources, and the non-control node directly transmits data to the control node on the assigned resources;
if the control node judges that the non-control node can not be directly accessed, the DCI simultaneously comprises PUCCH, PUSCH, PSCCH and PSSCH resources, and further comprises the following steps:
step 3.1: the non-control node determines a next hop node through the stored routing table information, and establishes a Sidelink link with the next hop node on a PSDCH channel through a Sidelink discovery function;
step 3.2: the non-control node needing to report the resources sends all resource information used by the transmission to a next hop node through a PSCCH resource, and the next hop node acquires the initial positions of all resources required by the transmission after decoding a PSCCH channel to acquire side chain control information SCI;
step 3.3: the non-control node needing to report the resource reports the sensing data to the next hop node on the assigned PSCCH and PSSCH channel resources;
step 3.4: and the next hop node transmits the data to the control node on the PUCCH and PUSCH resources.
Further, the data backhaul in the first-level subnet further comprises the following steps:
step2.1: the non-control node in the first-level subnet judges the next hop node according to the received routing table information, if the next hop node is the control node, the data is transmitted to the control node according to the 5G standard uplink transmission process, and if the next hop node is the non-control node, step2.2-Step2.10 are executed:
step2.2: and the non-control node initiates a return resource application to the control node on the random access channel PRACH.
Step2.3: after receiving the feedback resource application, the control node divides corresponding resources for the data transmission and transmits downlink control information DCI to the non-control node through a downlink control channel PDCCH, wherein the resources comprise: the system comprises a side chain control channel PSCCH, a side chain shared channel PSSCH, a side chain feedback channel PSFCH, an uplink control channel PUCCH, an uplink shared channel PUSCH and a starting position of a resource, wherein the PSCCH is used for carrying side chain control information SCI for decoding data between non-control nodes, the PSSCH is used for carrying required return data, the PSFCH is used for decoding and feeding back side chain communication data, the PUCCH is used for carrying uplink control information UCI for decoding at a control node, and the PUSCH is used for carrying sensing data.
Step2.4: the non-control node determines a next hop node through the stored routing table information, and establishes a Sidelink link with the next hop node on a PSDCH channel based on the Sidelink discovery function;
step2.5: sending all resource information used by the transmission to a next hop node through a PSCCH (pseudo random channel) resource, and acquiring initial positions of all resources required by the transmission by the next hop node after decoding a PSCCH channel to acquire side chain control information SCI (serial communication interface);
step2.6: the non-control node needing to report the resource reports the sensing data to the next hop node on the allocated PSCCH and PSSCH channel resources;
step2.7: after the next hop node successfully receives the data, sending ACK information to the previous hop node through PSFCH resources, otherwise sending NACK information, and when receiving the NACK information, retransmitting the data in PSCCH and PSSCH channel resources;
step2.8: if the next hop node can be directly connected with the control node, transmitting the return data to the control node on PUCCH and PUSCH resources according to the resource information contained in the SCI, otherwise, repeating the step2.4 to continuously transmit the data to the next node;
step2.9: if the control node successfully receives the data, an ACK message is sent on a PDCCH (physical Downlink control channel), otherwise, a NACK (negative acknowledgement) message is sent, and if the node receives the NACK message, data retransmission needs to be carried out on PUCCH and PUSCH (physical uplink control channel) channel resources;
step2.10: and releasing all resources after the control node finishes receiving the data.
Has the beneficial effects that:
1. the invention provides an offshore wireless backhaul networking system based on information perception, which adopts a hierarchical network architecture, wherein a first subnet is a main carrier multi-hop backhaul subnet, and a second subnet is a secondary carrier access subnet. The distance of ship data return is increased through a multi-hop transmission mode, and meanwhile, the nodes in the second-level subnet are subjected to resource management through the control nodes of the second-level subnet, so that the communication resource overhead required by the shore-based base station for resource management is reduced.
2. Compared with an offshore communication system for expanding the coverage distance through a relay base station, the offshore wireless backhaul networking system based on information perception provided by the invention utilizes nodes such as buoys, ships and offshore oil platforms.
3. According to the maritime wireless backhaul networking method based on information perception, the selection of the backhaul node is carried out through an information perception method (channel perception, interference perception and energy perception) and a designed perception information reporting process, and the problem of communication link interruption caused by the fact that interfered nodes and low-energy nodes participate in data backhaul is solved through a perception information reporting mode.
Drawings
Fig. 1 is a diagram of a maritime wireless backhaul network architecture;
fig. 2 is a first-level sub-network main carrier multi-hop backhaul network architecture diagram;
fig. 3 is a second level sub-network master-slave carrier access sub-network architecture diagram;
FIG. 4 is a flow chart of perceptual information reporting;
fig. 5 is a flow chart of multi-hop perception information reporting;
FIG. 6 is a flowchart of data return;
fig. 7 is a flow chart of multi-hop data backhaul.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The invention provides an offshore wireless backhaul networking method based on information perception, and as shown in figure 1, the method comprises a shore-based base station, at least 1 backhaul relay node, at least 1 main ship node and a plurality of slave ship nodes. The nodes are in wireless communication through the millimeter wave link.
The shore-based base station node is a 5G macro base station and is provided with a wireless communication module, a perception information acquisition module and a routing table calculation module, wherein the wireless communication module is used for data transmission between the shore-based base station and a backhaul relay node or a main ship node; the perception information acquisition module is used for acquiring and storing the received perception information periodically uploaded by the relay backhaul node and the main carrier node from the shore-based base station node wireless communication module; the route table calculation module is a certain time interval T 1 And reading the sensing information of all the nodes stored in the sensing information acquisition module, calculating the routing tables of all the current nodes, generating routing table data packets and transmitting the routing table data packets to the wireless communication module.
The backhaul relay node can be a buoy, an offshore platform or other backhaul relay ships, is provided with relay backhaul equipment and completely realizes an NR Sidelink protocol stack, and the relay backhaul equipment further comprises a wireless communication module and an information perception module, wherein the wireless communication module is used for data transmission with a shore-based base station, other relay backhaul nodes and a main ship node; the information perception module is used for acquiring the required perception information, generating corresponding information reporting information and submitting the information reporting information to the wireless communication module.
The main ship node is a 5G relay base station, has the capacity of realizing all protocols of the 5G base station and the 5G Silelink, and is provided with a wireless communication module and an information perception module, wherein the wireless communication module is used for data transmission between the main ship node and a slave ship node, a relay return node or a shore-based base station; the information perception module is used for perceiving predefined perception information which needs to be reported to the shore-based base station.
The slave ship node serves as a 5G terminal, has the function of a protocol stack required by the 5G terminal, and is directly connected to the main ship node.
Further, the offshore wireless backhaul network is divided into two stages:
as shown in fig. 2 and fig. 3, the offshore wireless backhaul network is divided into two-stage subnets and control nodes thereof are specified, wherein the first-stage subnet is a main carrier multi-hop backhaul network and includes a shore-based base station, backhaul relay nodes and main carrier nodes, and the control nodes thereof are the shore-based base station; the second-level sub-network is a master-slave carrier access network and comprises a master carrier node and slave carrier nodes, and the control node is the master carrier node.
Aiming at the offshore wireless backhaul networking system, the steps shown in fig. 4 are adopted for information perception:
step1: the control node of the first-level subnet periodically sends system information broadcast SIB, wherein the SIB includes Sidelink system configuration information supported in the 5G standard, and also includes: energy perception denial of service threshold lambda, energy perception strategy regulation threshold mu and channel perception power threshold P 1 。
And 2, step: the control node of the first-level subnet periodically allocates channel sensing information reporting communication resources for the non-control nodes in all the subnets, and sends downlink control information DCI to the non-control nodes needing sensing information reporting through a downlink control channel PDCCH, the non-control nodes acquire the DCI information by decoding the PDCCH to judge whether the information is transmitted to the non-control nodes, and if so, the non-control nodes further acquire the related information of the allocated communication resources.
If the non-control node is judged by the control node to be directly accessed, the communication resources comprise uplink control channel (PUCCH) resources, uplink shared channel (PUSCH) resources and the initial positions of the resources, wherein the PUCCH is used for bearing Uplink Control Information (UCI) for decoding at the control node, and the PUSCH is used for bearing sensing data.
If the non-control node is judged by the control node to be incapable of being directly accessed, the communication resources comprise side chain control channel PSCCH resources, side chain shared channel PSSCH resources, uplink control channel PUCCH resources, uplink shared channel PUSCH resources and starting positions of the resources, wherein the PSCCH is used for carrying side chain control information SCI for decoding data between the non-control nodes, the PSSCH is used for carrying sensing data, the PUCCH is used for carrying uplink control information UCI for decoding at the control node, and the PUSCH is used for carrying sensing data.
And 3, step 3: after acquiring the sensing information reporting resource information, the non-control node first reads the sensing information data stored in the self information sensing module, and then transmits the data to the next node on the assigned wireless resource.
Further, if the control node determines that the non-control node can directly access, the DCI only includes PUCCH and PUSCH resources, and the non-control node directly transmits data to the control node on the assigned resources.
If the control node judges that the non-control node can not be directly accessed, the DCI simultaneously comprises PUCCH, PUSCH, PSCCH and PSSCH resources, and at this time, as shown in FIG. 5, the method further comprises the following steps:
step 3.1: and the non-control node determines a next hop node through the stored routing table information, and establishes a Sidelink link with the next hop node on a PSDCH channel through a Sidelink discovery function.
Step 3.2: and the non-control node needing to report the resources sends all resource information used by the transmission to the next hop node through the PSCCH resources, and the next hop node acquires the starting positions of all resources required by the transmission after decoding the PSCCH channel to acquire the side chain control information SCI.
Step 3.3: and the non-control node needing to report the resources reports the sensing data to the next hop node on the allocated PSCCH and PSSCH channel resources.
Step 3.4: and the next hop node transmits the data to the control node on the PUCCH and PUSCH resources.
And 4, step 4: and (3) the control node releases the resources after receiving the sensing data, and repeats the step (1) after waiting for the next resource reporting period.
The specific method for sensing each kind of information and the data reporting format are as follows:
energy perception
After decoding a system information broadcast message SIB sent by a control node, a non-control node acquires an energy perception denial of service threshold lambda and an energy perception strategy regulation threshold mu.
And dividing the power supply energy of the ith node needing energy sensing into three discrete levels (i), namely normal, warning and dangerous.
Setting a denial of service threshold lambda and a policy regulation threshold mu, and then the Level (i) Level division policy is shown as the following formula:
wherein E is 0 Is the initial energy magnitude of node i, E i Is the current remaining energy of node i.
Channel quality perception
The channel quality perception is based on a channel state information reference signal CSI-RS defined in 5G standard TS 38.211, the CSI-RS is periodically transmitted by a control node, a non-control node detects the signal power of all subcarriers carrying the CSI-RS in a frequency band, and the final reference signal receiving power is the average value of the receiving power of all subcarriers, as shown in the following formula:
wherein, P detect_i And n is the total number of the sub-carriers occupied by all the CSI-RSs in the communication frequency band.
The non-control node obtains the system information broadcast message SIB sent by the control node through decodingOf the channel-aware power threshold P 1 Further defining the channel quality state L (i) of the ith node, and when the measured RSRP value of the node is less than the threshold value P 1 Time, it means that a communication link cannot be established directly with the control node:
interference perception
Dividing a communication frequency band used by a node into N communication channels at equal intervals, calculating a power spectrum in the whole communication frequency spectrum, firstly setting the number of sampling points as 2NL, and calculating the power spectrum according to a modified periodogram method, wherein the power spectrum obtained by the calculation can be represented by the following formula:
wherein w (L) is a Hamming window function, and L is the number of power spectrum points.
The number of power spectrum points obtained by the above formula is a real signal with a length NL, the power spectrum is sequentially divided into N sections, and then the number of power spectrum points of each section is L, and the energy of the ith communication channel detected this time is as follows:
further setting a threshold value gamma, and detecting the energy value E of each communication channel i Comparison with a threshold value gamma, if E i <Gamma means that the communication channel is not interfered, otherwise, the communication channel is judged to be interfered, when the interfered channels exist in all the communication channels in the communication frequency band, the sensing node judges that the sensing node is interfered, and a node interference identifier I (I) of the ith node is defined as shown in the following formula:
sensing information reporting data frame structure
A data packet of a protocol data unit PDU of the 5G MAC layer consists of one MAC header, 1 or more MAC control information units, and 1 or more service data payload SDUs and 1 padding. Wherein, the MAC header is used for indicating the message types of the subsequent control information unit, SDU and padding thereof. In the data format of the SDU, 00000 to 11111 are adopted in 5G to respectively identify different data types, wherein 01011-11001 are reserved sequence numbers, therefore, any one of 01011 to 11001 can be adopted in the MAC header of the sensing information reporting data as a message type identifier, and the data format contained in the SDU is as follows:
table 1 sensing information reporting SDU data format
In the offshore wireless backhaul networking system, when data needs to be transmitted back at a non-control node in each subnet or a control node in a second-level subnet, the wireless data transmission back is performed by adopting the steps shown in fig. 6:
step1: and the control node in the first-level subnet excludes the nodes of the energy danger level and the interfered nodes according to the acquired perception state information, generates a routing table in the subnet according to the HWMP protocol defined in the 802.11s standard, wherein the routing table comprises all non-control nodes and next hop nodes in the subnet, and broadcasts the routing table information to the non-control nodes in the subnet through a broadcast channel PBCH.
Step2: when the data of the non-control nodes in the first-level subnet need to be transmitted back, the data is directly transmitted back to the shore-based base station through the first-level subnet, and when the data of the non-control nodes in the second-level subnet need to be transmitted back, the data is transmitted to the control node of the second-level subnet through the 5G access process by the second-level subnet, and then is transmitted back to the shore-based base station through the first-level subnet by the control node.
Wherein, the data back transmission in the first-level sub-network further comprises the following steps:
step2.1: the non-control node in the first-level subnet judges its next hop node according to the received routing table information, if the next hop node is a control node, as shown in fig. 6, transmits data to the control node according to a 5G standard uplink transmission process, and if the next hop node is a non-control node, as shown in fig. 7, further includes the following steps:
step2.2: and the non-control node initiates a return resource application to the control node on the random access channel PRACH.
Step2.3: after receiving the feedback resource application, the control node divides corresponding resources for the data transmission and transmits downlink control information DCI to the non-control node through a downlink control channel PDCCH, wherein the resources comprise: the system comprises a side chain control channel PSCCH, a side chain shared channel PSSCH, a side chain feedback channel PSFCH, an uplink control channel PUCCH, an uplink shared channel PUSCH and a starting position of a resource, wherein the PSCCH is used for carrying side chain control information SCI for decoding data between non-control nodes, the PSSCH is used for carrying required return data, the PSFCH is used for decoding and feeding back side chain communication data, the PUCCH is used for carrying uplink control information UCI for decoding at a control node, and the PUSCH is used for carrying sensing data.
Step2.4: and the non-control node determines a next hop node through the stored routing table information and establishes a Sidelink link with the next hop node on the PSDCH based on the Sidelink discovery function.
Step2.5: and sending all resource information used by the transmission to a next hop node through PSCCH resources, and acquiring the initial positions of all resources required by the transmission by the next hop node after decoding the PSCCH to acquire side chain control information SCI.
Step2.6: and the non-control node needing to report the resources reports the sensing data to the next hop node on the allocated PSCCH and PSSCH channel resources.
Step2.7: and after the next hop node successfully receives the data, sending ACK information to the previous hop node through the PSFCH resource, otherwise, sending NACK information, and when receiving the NACK information, retransmitting the data on the PSCCH and PSSCH channel resource.
Step2.8: if the next hop node can be directly connected with the control node, the return data is transmitted to the control node on the PUCCH and PUSCH resources according to the resource information contained in the SCI, otherwise, the step2.4 is repeated to continuously transmit the data to the next node.
Step2.9: and if the control node successfully receives the data, sending an ACK message on a PDCCH (physical Downlink control channel), otherwise, sending a NACK (negative acknowledgement) message, and if the control node receives the NACK message, retransmitting the data on PUCCH and PUSCH (physical uplink control channel) channel resources.
Step2.10: and releasing all resources after the control node finishes receiving the data.
The backhaul relay node related to the present invention includes, but is not limited to, a buoy, a ship, an offshore oil platform, and the like, and any node capable of carrying communication and sensing functional devices may be substituted, such as an unmanned aerial vehicle, an unmanned ship, a sensor, and the like.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. An offshore wireless backhaul networking system based on information awareness, comprising: the system comprises a shore-based base station, at least 1 backhaul relay node, at least 1 main ship node and a plurality of slave ship nodes; the nodes are in wireless communication through millimeter wave links; the system is constructed to obtain an offshore wireless backhaul network;
the shore-based base station node is a 5G macro base station;
the return relay node is a buoy, an offshore platform or other return relay ships, is loaded with relay return equipment and completely realizes an NR Silelink protocol stack;
the main ship node is a 5G relay base station and has the capacity of realizing all protocols of the 5G base station and the 5G Sidelink;
the slave ship node serves as a 5G terminal, has a protocol stack function required by the 5G terminal, and is directly connected to the main ship node.
2. The offshore wireless backhaul networking system according to claim 1, wherein said shore-based base station node comprises a wireless communication module, a sensing information acquisition module, and a routing table calculation module, wherein said wireless communication module is used for data transmission between said shore-based base station and a backhaul relay node or a host ship node; the perception information acquisition module is used for acquiring and storing received perception information periodically uploaded by the relay backhaul node and the main ship node from the shore-based base station node wireless communication module; the routing table computation module is at certain time intervals T 1 Reading the perception information of all nodes stored in the perception information acquisition module, calculating the routing tables of all the current nodes, generating routing table data packets and transmitting the routing table data packets to the wireless communication module;
the backhaul relay node further comprises a wireless communication module and an information perception module, wherein the wireless communication module is used for data transmission with the shore-based base station, other relay backhaul nodes and the main ship node; the information perception module is used for acquiring the required perception information, generating corresponding information reporting information and submitting the information reporting information to the wireless communication module;
the main ship node is provided with a wireless communication module and an information perception module, wherein the wireless communication module is used for data transmission between the main ship node and a slave ship node, a relay return node or a shore-based base station; the information perception module is used for perceiving predefined perception information which needs to be reported to the shore-based base station;
the offshore wireless backhaul network is divided into two stages: the first-level sub-network is a main ship multi-hop backhaul network and comprises a shore-based base station, backhaul relay nodes and main ship nodes, and control nodes of the first-level sub-network are the shore-based base station; the second-level sub-network is a master-slave carrier access network and comprises a master carrier node and slave carrier nodes, and the control node is the master carrier node.
3. An offshore wireless backhaul networking method based on information perception, which is characterized in that the offshore wireless backhaul networking system according to claim 1 or 2 is subjected to information perception by adopting the following method:
step1: the control node of the first-level subnet periodically sends system information broadcast SIB, wherein the SIB includes Sidelink system configuration information supported in the 5G standard, and also includes: energy perception denial of service threshold lambda, energy perception strategy regulation threshold mu and channel perception power threshold P 1 ；
And 2, step: the control node of the first-level subnet periodically allocates channel sensing information reporting communication resources for the non-control nodes in all subnets, and transmits downlink control information DCI to the non-control nodes needing sensing information reporting through a downlink control channel PDCCH, the non-control nodes acquire the DCI information by decoding the PDCCH to judge whether the message is transmitted to the non-control nodes, and if so, the non-control nodes further acquire the related information of the allocated communication resources;
if the non-control node is judged by the control node to be directly accessed, the communication resources comprise uplink control channel (PUCCH) resources, uplink shared channel (PUSCH) resources and starting positions of the resources, wherein the PUCCH is used for bearing Uplink Control Information (UCI) for decoding at the control node, and the PUSCH is used for bearing sensing data;
if the non-control node is judged by the control node to be incapable of being directly accessed, the communication resources comprise side chain control channel (PSCCH) resources, side chain shared channel (PSSCH) resources, uplink control channel (PUCCH) resources, uplink shared channel (PUSCH) resources and starting positions of the resources, wherein the PSCCH is used for bearing side chain control information (SCI) for decoding data among the non-control nodes, the PSSCH is used for bearing the sensing data, the PUCCH is used for bearing the Uplink Control Information (UCI) for decoding at the control node, and the PUSCH is used for bearing the sensing data;
and 3, step 3: after acquiring the sensing information reporting resource information, the non-control node firstly reads the sensing information data stored in the self information sensing module and then transmits the data to the next node on the assigned wireless resource;
and 4, step 4: the control node releases the resources after receiving the sensing data, and returns to the step1 after waiting for the next resource reporting period;
in the offshore wireless backhaul networking system, when data needs to be transmitted back by non-control nodes in each subnet or control nodes in a second-level subnet, the wireless data transmission back is performed by adopting the following steps:
step1: and the control node in the first-level subnet excludes the nodes of the energy danger level and the interfered nodes according to the acquired perception state information, generates a routing table in the subnet according to the HWMP protocol defined in the 802.11s standard, wherein the routing table comprises all non-control nodes and next hop nodes in the subnet, and broadcasts the routing table information to the non-control nodes in the subnet through a broadcast channel PBCH.
Step2: when the non-control nodes in the first-level subnet have data to be transmitted back, the data is directly transmitted back to the shore-based base station through the first-level subnet, and when the non-control nodes in the second-level subnet have data to be transmitted back, the data is transmitted to the control nodes of the second-level subnet through the 5G access process by the second-level subnet, and then is transmitted back to the shore-based base station through the first-level subnet by the control nodes.
4. The information perception-based maritime wireless backhaul networking method according to claim 3, wherein in step 3, if the control node determines that the non-control node can directly access, the DCI only includes PUCCH and PUSCH resources, and the non-control node directly transmits data to the control node on the assigned resources;
if the control node judges that the non-control node can not be directly accessed, the DCI simultaneously comprises PUCCH, PUSCH, PSCCH and PSSCH resources, and further comprises the following steps:
step 3.1: the non-control node determines a next hop node through the stored routing table information, and establishes a Sidelink link with the next hop node on a PSDCH channel through a Sidelink discovery function;
step 3.2: the non-control node needing to report the resources sends all resource information used by the transmission to a next hop node through PSCCH resources, and the next hop node obtains the initial positions of all resources needed by the transmission after decoding PSCCH channels to obtain side chain control information SCI;
step 3.3: the non-control node needing to report the resource reports the sensing data to the next hop node on the allocated PSCCH and PSSCH channel resources;
step 3.4: and the next hop node transmits the data to the control node on the PUCCH and PUSCH resources.
5. The information awareness-based maritime wireless backhaul networking method according to claim 3 or 4, wherein the first-level intra-subnet data backhaul further comprises the steps of:
step2.1: the non-control node in the first-level subnet judges the next hop node according to the received routing table information, if the next hop node is the control node, data is transmitted to the control node according to the 5G standard uplink transmission process, and if the next hop node is the non-control node, step2.2-Step2.10 are executed:
step2.2: and the non-control node initiates a return resource application to the control node on the random access channel PRACH.
Step2.3: after receiving the feedback resource application, the control node divides corresponding resources for the data transmission and transmits downlink control information DCI to the non-control node through a downlink control channel PDCCH, wherein the resources comprise: the system comprises a side chain control channel PSCCH, a side chain shared channel PSSCH, a side chain feedback channel PSFCH, an uplink control channel PUCCH, an uplink shared channel PUSCH and a starting position of resources, wherein the PSCCH is used for bearing side chain control information SCI for decoding data between non-control nodes, the PSSCH is used for bearing required return data, the PSFCH is used for decoding and feeding back side chain communication data, the PUCCH is used for bearing uplink control information UCI for decoding at a control node, and the PUSCH is used for bearing sensing data.
Step2.4: the non-control node determines a next hop node through the stored routing table information, and establishes a Sidelink link with the next hop node on a PSDCH channel based on the Sidelink discovery function;
step2.5: sending all resource information used by the transmission to a next hop node through a PSCCH (pseudo random channel) resource, and acquiring initial positions of all resources required by the transmission by the next hop node after decoding a PSCCH channel to acquire side chain control information SCI (serial communication interface);
step2.6: the non-control node needing to report the resource reports the sensing data to the next hop node on the allocated PSCCH and PSSCH channel resources;
step2.7: after the next hop node successfully receives the data, sending ACK information to the previous hop node through PSFCH resources, otherwise sending NACK information, and when receiving the NACK information, needing to retransmit the data in PSCCH and PSSCH channel resources;
step2.8: if the next hop node can be directly connected with the control node, transmitting the returned data to the control node on PUCCH and PUSCH resources according to the resource information contained in the SCI, otherwise repeating the step2.4 to continuously transmit the data to the next node;
step2.9: if the control node successfully receives the data, an ACK message is sent on a PDCCH (physical Downlink control channel), otherwise, a NACK (negative acknowledgement) message is sent, and if the node receives the NACK message, data retransmission needs to be carried out on the PUCCH and PUSCH channel resources;
step2.10: and releasing all resources after the control node finishes receiving the data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211096666.2A CN115665691A (en) | 2022-09-06 | 2022-09-06 | Offshore wireless backhaul networking system and method based on information perception |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211096666.2A CN115665691A (en) | 2022-09-06 | 2022-09-06 | Offshore wireless backhaul networking system and method based on information perception |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115665691A true CN115665691A (en) | 2023-01-31 |
Family
ID=84984185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211096666.2A Pending CN115665691A (en) | 2022-09-06 | 2022-09-06 | Offshore wireless backhaul networking system and method based on information perception |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115665691A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117082651A (en) * | 2023-07-10 | 2023-11-17 | 武汉船舶通信研究所(中国船舶集团有限公司第七二二研究所) | 5G hierarchical distributed network suitable for shipborne environment |
-
2022
- 2022-09-06 CN CN202211096666.2A patent/CN115665691A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117082651A (en) * | 2023-07-10 | 2023-11-17 | 武汉船舶通信研究所(中国船舶集团有限公司第七二二研究所) | 5G hierarchical distributed network suitable for shipborne environment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11844089B2 (en) | Methods and devices for scheduling group uplink communication | |
| EP1895714B1 (en) | Device for controlling the transmission power of a basic service set in a wireless local area network | |
| CN112425188B (en) | Relaying vehicle communications using network coding | |
| CN115244903A (en) | Method and apparatus for transmitting and receiving PDCCH in a wireless communication system | |
| CN112119653A (en) | Resource fragmentation over a side link interface | |
| EP4020861A1 (en) | Method and apparatus for performing sl communication on basis of psfch overhead in nr v2x | |
| CN114175690A (en) | Techniques for handling scheduling conflicts between access link communications and sidelink communications | |
| US20220416969A1 (en) | Method and apparatus for requesting csi in nr v2x | |
| US11778640B2 (en) | Method and device for performing SL communication on basis of assistance information in NR V2X | |
| KR20180099750A (en) | A method and apparatus for a terminal to measure and transmit a CR in a wireless communication system | |
| US20210314730A1 (en) | Relaying for vehicular communications | |
| US20230037912A1 (en) | Method and apparatus for performing mode 1 sl communication in nr v2x | |
| EP4054103B1 (en) | Method and device for performing congestion control in nr v2x | |
| CN113439475A (en) | Network node, UE and method performed therein for handling communication | |
| CN114175720A (en) | Signaling sidelink transmit power control commands | |
| CN115917988A (en) | Sidelink control signaling with transmit beam indication | |
| CN115665691A (en) | Offshore wireless backhaul networking system and method based on information perception | |
| US20220408481A1 (en) | Method and apparatus for performing congestion control in nr v2x | |
| CN111954992A (en) | Communicating multiple instances of a message in a random media access control system | |
| US20240057122A1 (en) | Method and apparatus for performing sl drx operation in nr v2x | |
| US20240008061A1 (en) | Method and apparatus by which lte v2x and nr v2x coexist in same frequency band | |
| US20230156837A1 (en) | Method and device for transmitting vehicle-to-vehicle communication message in wireless communication system | |
| US20210136701A1 (en) | Dynamic physical sidelink control channel gain | |
| US20220408457A1 (en) | Method and device for performing sl communication on basis of resource allocation mode 1 in nr v2x | |
| CN113261369A (en) | Receiver-based resource reservation including resources reserved by a first UE |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |