CN111935776A - Wireless relay method, node and network based on superframe - Google Patents
Wireless relay method, node and network based on superframe Download PDFInfo
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- CN111935776A CN111935776A CN202010817396.4A CN202010817396A CN111935776A CN 111935776 A CN111935776 A CN 111935776A CN 202010817396 A CN202010817396 A CN 202010817396A CN 111935776 A CN111935776 A CN 111935776A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/04—Error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
- H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
- H04L1/0022—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy in which mode-switching is influenced by the user
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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- 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
Abstract
The invention discloses a wireless relay method, a node and a network based on a superframe, wherein the method comprises the following steps: decoding the received wireless signal at the physical layer, and detecting or correcting the decoding according to the channel coding information obtained by decoding to obtain a data frame; judging whether the current node is matched with a target node of the data frame; if yes, processing the data frame; if not, judging whether the data frame meets a forwarding condition, wherein the forwarding condition comprises the following steps: the forwarded hop count is less than the total hop count; if yes, the forwarded hop count is modified, the data frame is forwarded after coding, and the current node enters a sleep mode within the remaining time of the superframe. After the node forwards or sends the data frame, the node enters a sleep mode, so that on one hand, energy is saved, and on the other hand, reverse transmission of the data frame is prevented; the total hop count is used for controlling the life cycle of the data frame; the data frame is detected or corrected through the channel coding information, so that the high availability and the receiving sensitivity of the data frame are improved, and the influence of the retransmission of the data frame on the channel capacity production is avoided.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a wireless relay method, a node and a network based on a superframe.
Background
Mobile communication systems are classified into private mobile communication systems and public communication systems according to the range they serve, and public mobile communication is a mobile communication system including a wide range and having various systems, of which the most important is a cellular mobile communication system; the specialized mobile communication system was originally developed by the walkie-talkie, and the frequency of the walkie-talkie was concentrated to be shared by more users.
A wireless communication network system for narrowband signals is a special mobile communication system, and is generally applied to voice transmission. The contradiction between high data rate bandwidth and high reliability of a wireless communication network is to ensure that a user has enough high data rate bandwidth and meet the requirements of transmission distance and coverage effect, and for voice transmission, because the voice bandwidth is small, the high data rate bandwidth is not the main performance index of an ad hoc network; the high reliability and communication coverage of network transmission are the primary considerations in the design of ad hoc networks.
At present, many ad hoc network systems are cluster communication systems with central nodes, are mainly applied to large enterprises, groups and units, need to build a large amount of basic communication facilities, and are very expensive. The whole network carries out operations such as synchronization, routing coordination and the like based on the center. In addition, the whole system needs to keep a synchronous state all the time, each node needs to ensure that the synchronization is carried out based on the central node, and the whole network is paralyzed when the central node is lost or broken.
Relaying is one of the main means to extend the communication coverage. In a traditional ad hoc network, a traditional wireless communication station generally does not have a relay function, and the existing wireless communication station with the relay function is a multi-hop single-point linear relay of a network layer, and a routing circuit is selected for relaying through a network layer protocol. Meanwhile, the relay network generally has a control node for controlling the selection mode and the routing mode of the relay node, and when the control node fails or leaves the network, the system cannot normally operate. The influence of the comprehensive factors such as random movement of the relay node, the random startup and shutdown of the node, the change of the transmission power of the wireless transmitting device, the mutual interference between wireless channels, terrain and the like, and the network topology structure formed by the wireless channels between the terminals can change at any time, and the changing mode and speed are unpredictable, so that the reliability and the coverage effect of the system are reduced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a superframe-based wireless relay method, a node and a network, which have the characteristics of high reliability and communication coverage.
A superframe-based wireless relay method, the method comprising: decoding a received wireless signal at a physical layer, detecting or correcting the decoding according to channel coding information obtained by decoding to obtain a data frame, wherein control information of the data frame comprises a target node, forwarded hop count, total hop count and channel coding information; judging whether the current node is matched with a target node of the data frame; if yes, processing the data frame; if not, judging whether the data frame meets a forwarding condition, wherein the forwarding condition comprises the following steps: the forwarded hop count is less than the total hop count; and if so, modifying the forwarded hop count, forwarding the data frame after encoding, and enabling the current node to enter a sleep mode in the remaining time of the superframe.
Preferably, the control information of the data frame further includes rate matching information, and the sending node adjusts the frame length of the data frame through the rate matching information.
Preferably, the control information further includes scrambling information, the sending node establishes scrambling information for the data frame, and the receiving node descrambles the scrambling information.
Preferably, the control information further includes information of a first cyclic redundancy check, the node checks the information of the first cyclic redundancy check, and the forwarding condition further includes that the information of the first cyclic redundancy check is successfully checked.
Preferably, the method of decoding a radio signal includes: decoding control information in a wireless signal, the control information further comprising a length of data information; detecting or correcting the decoding according to the channel coding information; judging whether the control information is decoded successfully or not through the information of the first cyclic redundancy check; if so, decoding the data information by using the length of the data information to obtain the data frame.
Preferably, the data information of the data frame includes information of a second cyclic redundancy check, the node checks the information of the second cyclic redundancy check, and the forwarding condition further includes that the information of the second cyclic redundancy check is successfully checked.
Preferably, the data frame further includes a preamble sequence, an access code and a tail sequence, and the signal strength is detected according to the preamble sequence; identifying the frame header position of the data frame according to the access code; the information of the tail sequence is arranged between the control information and the access code.
The invention also provides a wireless relay node based on the superframe, which comprises a first receiving module, a sending module, a decoding module, a first judging module, a second judging module, a processing module, a channel coding module, a modifying module and a superframe adjusting module; the first receiving module is used for receiving wireless signals at a physical layer; the decoding module is used for decoding the wireless signal and obtaining a data frame, and the control information of the data frame comprises a target node, forwarded hop count, total hop count and channel coding information; the channel coding module is used for detecting or correcting the data frame or decoding according to the channel coding information; the first judging module is used for judging whether the current node is matched with a target node of the data frame; the second judging module is configured to judge whether the data frame meets a forwarding condition, where the forwarding condition includes: the forwarded hop count is less than the total hop count; the processing module is used for processing the data frame; the modification module is used for modifying the forwarded hop count; the coding module is used for coding the data frame; the sending module is used for sending a wireless signal of a data frame; and the superframe adjusting module is used for adjusting the current node to enter the sleep mode in the remaining time of the superframe.
The invention also provides a superframe-based wireless relay network, which comprises a sending node and a relay node, wherein the sending node is used for sending the wireless signal of the data frame; the relay node is used for decoding the received wireless signal at a physical layer, detecting or correcting the decoding according to channel coding information obtained by decoding, and obtaining a data frame, wherein control information of the data frame comprises a target node, forwarded hop count, total hop count and channel coding information; if the relay node is a target node of a data frame, processing the data frame; if the relay node is not the target node of the data frame and the data frame meets the forwarding condition, modifying the forwarded hop count, forwarding the data frame after encoding, and entering a sleep mode in the remaining time of the superframe, wherein the forwarding condition comprises: the forwarded hop count is less than the total hop count.
Preferably, the control information further includes information of a first cyclic redundancy check, the sending node establishes the information of the first cyclic redundancy check for the data frame, the relay node checks the information of the first cyclic redundancy check, and the forwarding condition includes that the information of the first cyclic redundancy check is successfully checked.
Compared with the prior art, the invention has the beneficial effects that:
after the node forwards or sends the data frame, the node enters a sleep mode, so that on one hand, energy is saved, and on the other hand, reverse transmission of the data frame is prevented; the total hop count is used for controlling the life cycle of the data frame, and the forwarding is stopped when the forwarded hop count reaches the total hop count; the data frame is detected or corrected through the channel coding information, so that the high availability and receiving sensitivity of the data frame are improved, and the influence of the retransmission of the data frame on the channel capacity production is avoided; the node decodes the received wireless signal in the physical layer, which is beneficial to improving the decoding rate of the data frame.
Drawings
Fig. 1 is a flowchart of a superframe-based wireless relay method of the present invention;
FIG. 2 is a schematic diagram of a data frame slot;
FIG. 3 is a schematic diagram of a wireless signal relay network;
FIG. 4 is a schematic diagram of source data transmission;
FIG. 5 is a flow chart of a method of controlling decoding of a wireless signal using information of a first cyclic redundancy check;
fig. 6 is a logic block diagram of a superframe-based wireless relay node of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention is described in further detail below with reference to the attached drawing figures:
a superframe-based wireless relay method, as shown in fig. 1, the method comprising:
step 101: decoding the received wireless signal at a physical layer, detecting or correcting the decoding according to channel coding information obtained by decoding, and obtaining a data frame, wherein the control information of the data frame comprises a target node, forwarded hop count, total hop count and channel coding information. The detection or correction can be performed during the decoding process, or after the decoding process is finished.
Step 102: judging whether the current node is matched with a target node of the data frame;
if yes, go to step 103: processing the data frame;
if not, go to step 104: judging whether the data frame meets a forwarding condition, wherein the forwarding condition comprises the following steps: the forwarded hop count is less than the total hop count;
if yes in step 104, go to step 105: and modifying the forwarded hop count, forwarding the data frame after encoding, and enabling the current node to enter a sleep mode in the remaining time of the superframe. After the node forwards or sends the data frame, the node enters a sleep mode and does not receive signals any more, so that on one hand, energy is saved, and on the other hand, reverse transmission of the data frame is prevented. And the total hop count is used for controlling the life cycle of the data frame, and the forwarding is stopped when the forwarded hop count reaches the total hop count.
The superframe is divided into two time periods, an active time period and a sleep time period; correspondingly, the node is provided with an active mode and a sleep mode, the node participates in the forwarding of the data frame in the active mode, and the receiving and sending processing of the data frame is not carried out in the sleep mode.
The data frame is generated based on the source data, the data frame is provided with control information, the operation of forwarding, receiving or stopping forwarding of the relay node is controlled according to the target node, the forwarded hop count and the total hop count in the control information so as to improve the coverage of wireless communication, the data frame is detected or corrected through the channel coding information so as to improve the high availability and receiving sensitivity of the data frame, and the influence of the retransmission of the data frame on the production of channel capacity is avoided. The node decodes the received wireless signal in the physical layer, which is beneficial to improving the decoding rate of the data frame.
In the forwarding process, whether to carry out relay forwarding is controlled by the forwarded hop count and the total hop count, and the times of relay forwarding are controlled.
Example 1
As shown in fig. 2, each superframe is 60ms long, and each superframe comprises 4 slots, each of which is 15ms long. Wherein 4 time slots can generate 3 total hops, and the total hops can be adjusted by adjusting the number of the time slots. The data frame is transmitted at the beginning of the time slot, and the method for relaying the wireless signal can be executed in the remaining time (Gap) of the time slot to judge whether to forward or process the data frame. Processing the data frame refers to reporting the data frame from the physical layer to the Mac layer, and processing the data frame by the Mac layer.
And dividing the data frame into an i +1 th data frame according to the sending times of the data frame, wherein i is the hop count.
Slot 0(ST 0): the transmitting node transmits a first data frame.
In time slots i (sti), the ith node forwards the (i + 1) th data frame. For example, the node that correctly received the first data frame is the primary node, and forwards the second data frame in time slot 1.
When the time slot is finished, namely the life cycle of the data frame is finished, the data frame is not forwarded any more; the receiving node does not forward the data frame when receiving the data frame.
Example 2
Fig. 3 shows a schematic diagram of a wireless signal relay network, and fig. 4 shows a schematic diagram of source data transmission.
The relay network comprises a sending node and a relay node, wherein the sending node is used for sending a wireless signal of a data frame; the relay node is used for decoding the received wireless signal at a physical layer, detecting or correcting the decoding according to channel coding information obtained by decoding, and obtaining a data frame, wherein control information of the data frame comprises a target node, forwarded hop count, total hop count and channel coding information; if the relay node judges that the current node is a target node of a data frame, processing the data frame; if the relay node is not the target node of the data frame and the data frame meets the forwarding condition, modifying the forwarded hop number, forwarding the data frame after coding, and entering a sleep mode in the remaining time of the superframe, wherein the forwarding condition comprises: the forwarded hop count is less than the total hop count and the data frame has not been sent.
In fig. 3, N is the number of relay node stages, and M is the serial number of the relay node, for example, 2-1 is the 2-stage relay node with serial number 1.
As shown in fig. 4, in the slot 0, the transmitting node 0 transmits a wireless signal of the first DATA frame (source DATA0 or DATA1), which is received by the relay nodes 1-0 and 1-1.
In the time slot 1, the relay node 1-0 and the relay node 1-1 carry out relay forwarding, the transmitting signals of the relay node 1-0 and the relay node 1-1 are synchronous, and the relay node 2-0, the relay node 2-1 and the relay node 2-2 receive the forwarding signals of the relay node 1-0 and/or the relay node 1-1; and when the forwarding is judged according to the decoding, generating a second data frame according to the first data frame, and forwarding to form an effective path. After the data frame is sent by the sending node 0, the sending node enters the sleep mode, and therefore the data frame is not received any more in the remaining time of the superframe, which is an invalid path. The relay node 2-0 receives the first data frames of the relay nodes 1-0 and 1-1 at the same time, only one of the first data frames is forwarded, and the strong one of the first data frames can be selected for forwarding.
In the time slot 2, the relay node 2-0, the relay node 2-1 and the relay node 2-2 carry out forwarding, and the relay node 3-0 simultaneously receives forwarding signals of the relay node 2-0, the relay node 2-1 and the relay node 2-2, generates a third data frame and sends the third data frame to the next-stage relay node 3-0 when judging that the forwarding is carried out. The relay nodes 1-0 and 1-1 send data frames, go to sleep in the rest time of the superframe and do not receive the data frames any more, so that the paths are invalid.
And in the time slot 3, when the relay node 3-0 forwards, generating a fourth data frame and forwarding the next-stage relay node.
And in the time slot N, the relay node N-M judges that the destination address of the Nth data frame is the current node, and the relay node N-M receives the data frame. The relay node that receives the data frame is defined as a receiving node.
In a specific embodiment, the transmitting node performs modulation by using Gaussian Filtered Minimum Shift Keying (GMSK), a modulation factor is 0.5, and transmits a wireless signal through radio frequency.
Example 3
The control information also includes rate matching information, scrambling information, cyclic redundancy check information (CRC).
The sending node adjusts the frame length of the data frame according to the rate matching information, and is easy to adapt to the frame length requirements of various systems.
The sending node establishes the scrambling information for the data frame, and the receiving node or the relay node descrambles the scrambling information so as to improve the robustness of data or a network.
The transmitting node generates information of a first cyclic redundancy check based on an algorithm, the relay node generates information of a third cyclic redundancy check according to the algorithm, and the information of the first cyclic redundancy check and the information of the third cyclic redundancy check are checked to judge whether decoding is correct or not, and data frames with decoding errors are not forwarded.
In one embodiment, as shown in fig. 5, information using a first cyclic redundancy check controls wireless signal decoding:
step 501: decoding control information in a wireless signal, the control information further comprising a length of data information.
Step 502: the decoding is detected or corrected based on the channel coding information. The detection or correction may be performed synchronously during the decoding process, or after the decoding process.
Step 503: and judging whether the control information is decoded successfully or not according to the information of the first cyclic redundancy check.
If yes, go to step 504: and decoding the data information by using the length of the data information to obtain the data frame. After the control information is successfully decoded, the data information is decoded according to the length in the control information, which is beneficial to improving the effective rate of decoding, and when the control information is unsuccessfully decoded, the decoding of the data information and the forwarding of the data frame are not carried out, namely the forwarding condition also comprises the successful decoding of the control information, so that the forwarded data frame has high availability. If the determination in step 503 is no, the data information may not be decoded and the data frame may not be forwarded.
The invention may also include a method of verifying data information:
the data information comprises information of second cyclic redundancy check, the relay node judges whether the data information is decoded successfully or not by checking the information of the second cyclic redundancy check, and the forwarding condition further comprises the information of the second cyclic redundancy check being checked successfully. By checking the data information, the high availability of the data frame is improved. The data information includes information of the second cyclic redundancy check and the source data.
The receiving node may also determine whether to process the data frame by checking information of the first cyclic redundancy check and information of the second cyclic redundancy check. I.e., the data frame that is not decoded in error, may request the transmitting node to retransmit the data frame.
The data frame can also comprise a leader sequence, an access code and a tail sequence, and the signal strength is detected according to the leader sequence; identifying the frame header position of the data frame according to the access code; the information of the tail sequence is arranged at the front side of the control information.
In a specific embodiment, the relay node 2-0 receives the wireless signals of the second data frames of the relay nodes 1-0 and 1-1 at the same time, detects the signal strength according to the preamble sequence, and selects one with higher signal strength for forwarding.
The preamble sequence, the access code, the tail sequence, the control information and the data information form a frame structure, and the data information comprises information of the first cyclic redundancy check and source data.
The preamble sequence is a fixed sequence, and the Signal Strength can be detected by rssi (received Signal Strength indication), specifically, using bitstream [ 01010101 ].
The access code uses a sequence with better autocorrelation for frame synchronization, and can use bit stream [ 01101011011111011001000101110001 ]; namely 0x8E89BED 6.
A tail sequence is arranged between the control information and the access code for the transition of the access code and the control information, giving a rich time for frame synchronization, and a bit stream [ 01010101 ] can be used.
Example 4
The present embodiment provides a wireless relay node based on a superframe, as shown in fig. 6, including a first receiving module 1, a sending module 2, a decoding module 3, a first determining module 4, a second determining module 5, a processing module 6, a channel coding module 7, a coding module 8, a modifying module 9, and a superframe adjusting module 10; the first receiving module 1 is used for receiving wireless signals at a physical layer; the decoding module 3 is used for decoding the wireless signal and obtaining a data frame, and the control information of the data frame comprises a target node, forwarded hop count, total hop count and channel coding information; the channel coding module 7 is used for detecting or correcting the data frame or decoding according to the channel coding information; the first judging module 4 is used for judging whether the current node is matched with a target node of the data frame; the second judging module 5 is configured to judge whether the data frame meets a forwarding condition, where the forwarding condition includes: the forwarded hop count is less than the total hop count; the processing module 6 is used for processing the data frame; the modifying module 9 is used for modifying the forwarded hop count; the coding module 8 is used for coding the data frame; the sending module 2 is used for sending a wireless signal of a data frame; the superframe adjusting module 10 is used for adjusting the current node to enter the sleep mode in the rest time of the superframe.
The control information further includes cyclic redundancy check information, the sending node establishes first cyclic redundancy check information for the data frame, the relay node checks the first cyclic redundancy check information, and the forwarding condition further includes that the first cyclic redundancy check information is successfully checked.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. 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 (10)
1. A superframe-based wireless relay method, the method comprising:
decoding a received wireless signal at a physical layer, detecting or correcting the decoding according to channel coding information obtained by decoding to obtain a data frame, wherein control information of the data frame comprises a target node, forwarded hop count, total hop count and channel coding information;
judging whether the current node is matched with a target node of the data frame;
if yes, processing the data frame;
if not, judging whether the data frame meets a forwarding condition, wherein the forwarding condition comprises the following steps: the forwarded hop count is less than the total hop count;
and if so, modifying the forwarded hop count, forwarding the data frame after encoding, and enabling the current node to enter a sleep mode in the remaining time of the superframe.
2. The wireless relay method according to claim 1, wherein the control information of the data frame further includes rate matching information, and a transmitting node adjusts the frame length of the data frame by the rate matching information.
3. The wireless relay method of claim 1, wherein the control information further comprises scrambling information, wherein the sending node establishes a preferred information for the data frame, and wherein the receiving node descrambles the scrambling information.
4. The wireless relay method of claim 1, wherein said control information further comprises information of a first cyclic redundancy check,
the node checks the information of the first cyclic redundancy check, and the forwarding condition further includes that the information of the first cyclic redundancy check is checked successfully.
5. The wireless relay method according to claim 4, wherein the method of wireless signal decoding comprises:
decoding control information in a wireless signal, the control information further comprising a length of data information;
detecting or correcting the decoding according to the channel coding information;
judging whether the control information is decoded successfully according to the check of the first cyclic redundancy check information;
if so, decoding the data information by using the length of the data information to obtain the data frame.
6. The wireless relay method according to claim 4 or 5, wherein the data information of the data frame includes information of a second cyclic redundancy check,
the node checks the information of the second cyclic redundancy check, and the forwarding condition further includes that the information of the second cyclic redundancy check is checked successfully.
7. The wireless relay method of claim 1, wherein the data frame further comprises a preamble sequence, an access code, and a tail sequence,
detecting signal strength according to the leader sequence;
identifying the frame header position of the data frame according to the access code;
the information of the tail sequence is arranged between the control information and the access code.
8. A wireless relay node based on a superframe is characterized by comprising a first receiving module, a sending module, a decoding module, a first judging module, a second judging module, a processing module, a channel coding module, a modifying module and a superframe adjusting module;
the first receiving module is used for receiving wireless signals at a physical layer;
the decoding module is used for decoding the wireless signal and obtaining a data frame, and the control information of the data frame comprises a target node, forwarded hop count, total hop count and channel coding information;
the channel coding module is used for detecting or correcting the data frame or decoding according to the channel coding information;
the first judging module is used for judging whether the current node is matched with a target node of the data frame;
the second judging module is configured to judge whether the data frame meets a forwarding condition, where the forwarding condition includes: the forwarded hop count is less than the total hop count;
the processing module is used for processing a data frame;
the modification module is used for modifying the forwarded hop count;
the coding module is used for coding the data frame;
the sending module is used for sending a wireless signal of a data frame;
the superframe adjusting module is used for adjusting the current node to enter the sleep mode in the residual time of the superframe.
9. A wireless relay network based on a superframe is characterized by comprising a sending node and a relay node, wherein the sending node is used for sending wireless signals of data frames;
the relay node is used for decoding the received wireless signal at a physical layer, detecting or correcting the decoding according to channel coding information obtained by decoding, and obtaining a data frame, wherein control information of the data frame comprises a target node, forwarded hop count, total hop count and channel coding information;
if the relay node is a target node of a data frame, processing the data frame;
if the relay node is not the target node of the data frame and the data frame meets the forwarding condition, modifying the forwarded hop count, forwarding the data frame after encoding, and entering a sleep mode in the remaining time of the superframe, wherein the forwarding condition comprises: the forwarded hop count is less than the total hop count.
10. The wireless relay network of claim 9, wherein the control information further comprises information of a first cyclic redundancy check, wherein a transmitting node establishes the first cyclic redundancy check for a data frame, wherein the relay node checks the information of the first cyclic redundancy check, and wherein the forwarding condition further comprises that the information of the first cyclic redundancy check is checked successfully.
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| CN112752358A (en) * | 2020-12-29 | 2021-05-04 | 北京融讯信通科技有限公司 | Emergency processing method and system with central synchronization system |
| WO2023125318A1 (en) * | 2021-12-29 | 2023-07-06 | 维沃移动通信有限公司 | Communication method and apparatus, and communication device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112752358A (en) * | 2020-12-29 | 2021-05-04 | 北京融讯信通科技有限公司 | Emergency processing method and system with central synchronization system |
| WO2023125318A1 (en) * | 2021-12-29 | 2023-07-06 | 维沃移动通信有限公司 | Communication method and apparatus, and communication device |
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