CN109286984B - Multi-waveform ad hoc network transceiving method and device and computer readable storage medium - Google Patents
Multi-waveform ad hoc network transceiving method and device and computer readable storage medium Download PDFInfo
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- CN109286984B CN109286984B CN201811112450.4A CN201811112450A CN109286984B CN 109286984 B CN109286984 B CN 109286984B CN 201811112450 A CN201811112450 A CN 201811112450A CN 109286984 B CN109286984 B CN 109286984B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/715—Interference-related aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/52—Allocation or scheduling criteria for wireless resources based on load
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/715—Interference-related aspects
- H04B2001/7154—Interference-related aspects with means for preventing interference
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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 multi-waveform ad hoc network transceiving method, which comprises the following steps: when receiving an application type switching instruction of an air interface channel waveform, confirming the application type of the application type switching instruction, wherein the application type comprises an exclusive air interface channel and a shared air interface channel; when the application type of the application type switching instruction is confirmed to be an exclusive air interface channel, switching the application state of the target air interface channel waveform into an exclusive air interface channel waveform; and when the application type of the application type switching instruction is determined to be the shared air interface channel, switching the application state of the target air interface channel waveform to the shared air interface channel waveform. The invention also discloses a multi-waveform ad hoc network transceiving device and a computer readable storage medium. The invention correspondingly switches the occupation state of the air interface channel waveform of the received transceiving data according to the data transmitting state of the transceiving data, realizes the application state switching of multiple waveforms of the ad hoc network, and simultaneously meets the beneficial effects of high spectrum efficiency and quick movement of the transmitting node.
Description
Technical Field
The present invention relates to the field of ad hoc network technologies, and in particular, to a multi-waveform ad hoc network transceiving method and apparatus, and a computer-readable storage medium.
Background
The MESH ad hoc network does not have a central node (similar to a base station of a cellular network), so that the central node can not coordinate the transceiving of all nodes, thereby avoiding transceiving conflict (transmitting interference and receiving) and avoiding mutual interference when two or more signals are received at the same time. In this case, each node has to autonomously determine its own transceiving window, i.e. when to transmit or receive signals using which frequency band and which modulation method.
Common ad hoc network scheduling modes include CSMA, TDMA and frequency hopping. CSMA is a carrier sense multiple access method. That is, each node listens to the air interface channel before transmitting, and transmits if the node is idle (no other node is detected to transmit), otherwise, the node listens to the channel after retreating for a random time period. The TDMA divides the time into a plurality of time slots with repeated periods, allocates the transmitting time slots among the nodes in a mutual competition mode, and finally realizes that the transmitting time slots among the nodes do not conflict. CSMA is easy to implement, but when the node density becomes high, many nodes simultaneously monitor and seize an air interface channel, which may cause an aggravation of collision and a great deal of time consumption in channel seizing rather than actual service transmission. The TDMA does not generate transmission time slot conflict by allocating the transmission time slot of each node in advance, thereby having high transmission spectrum efficiency. However, when the network topology changes due to node movement or the node traffic changes, the timeslot must be reallocated to achieve the best air interface channel utilization. If the transmission slot reallocation is triggered frequently, the actual efficiency of the network is reduced. The frequency hopping scheme is a multiple access scheme used by protocols such as bluetooth. Through the rapid frequency hopping and the short packet technology, the collision among transmission links among different piconets is reduced as much as possible, and the stability of the links is ensured.
In the CSMA and TDMA scheduling modes, waveforms of exclusive channels such as OFDM are usually adopted, and two nodes cannot transmit by using the same time-frequency resource. The frequency hopping mode usually adopts narrow-band waveforms such as MSK (minimum shift keying) and the like, and the short-time narrow-band waveforms in the transmission window can reduce the collision probability to the minimum. CDMA is also a common waveform that achieves simultaneous transmission by spreading gain and using different spreading codes for different users. The existing ad hoc network generally adopts a single waveform, for example, the WIFI ad hoc network adopts an OFDM waveform, collision-free transmission is realized through a CSMA technology, and high throughput rate communication is realized, but when too many users are available, the collision probability is increased, and the throughput rate is seriously reduced. The Bluetooth ad hoc network adopts narrow-band waveforms, multi-user multiplexing is realized through randomized frequency hopping, users do not need to mutually negotiate a transmitting window and want to transmit immediately, but the throughput rate is not high because of certain collision probability. In a CSMA, TDMA, or frequency hopping multiple access manner, a single waveform cannot satisfy the requirements of high spectrum efficiency and fast node movement, or ad hoc communication when the service changes rapidly.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a multi-waveform ad hoc network transceiving method, and aims to solve the technical problem that the prior ad hoc network cannot simultaneously meet high spectral efficiency and node quick movement due to single application waveform.
In order to achieve the above object, the present invention provides a multi-waveform ad hoc network transceiving method, which includes the following steps:
when an application type switching instruction of an air interface channel waveform is received, confirming the application type of the application type switching instruction, wherein the application type comprises an exclusive air interface channel and a shared air interface channel;
when the application type of the application type switching instruction is confirmed to be an exclusive air interface channel, switching the application state of the target air interface channel waveform into an exclusive air interface channel waveform;
and when the application type of the application type switching instruction is determined to be the shared air interface channel, switching the application state of the target air interface channel waveform to the shared air interface channel waveform.
Preferably, the step of switching the application state of the target air interface channel waveform to an exclusive air interface channel waveform when it is determined that the application type of the application type switching instruction is an exclusive air interface channel further includes:
determining a time-frequency resource of a target air interface channel waveform used by a target transmitting node, and checking whether other exclusive air interface channel waveforms using the same time-frequency resource exist in a preset range;
and if not, switching the application state of the target air interface channel waveform into an exclusive air interface channel waveform.
Preferably, if not, the step of switching the application state of the target air interface channel waveform to an exclusive air interface channel waveform further includes:
generating broadcast information of time-frequency resources based on the target air interface channel waveform of the target transmitting node in a preset format;
and broadcasting the generated broadcast information so that the transmitting node receiving the broadcast information marks the time frequency resource used by the waveform of the target air interface channel as occupied according to the broadcast information.
Preferably, the step of switching the application state of the target air interface channel waveform to the shared air interface channel waveform when it is determined that the application type of the application type switching instruction is the shared air interface channel further includes:
acquiring an air interface channel load of the target transmitting window according to the target transmitting window of the target air interface channel waveform;
and generating broadcast information based on the air interface channel load according to a preset format and playing the broadcast information so that the transmitting node receiving the broadcast information records the air interface channel load of the broadcast information locally.
Preferably, the step of acquiring an air interface channel load of the target transmission window according to the target transmission window of the target air interface channel waveform further includes:
confirming the load technology type of the target transmitting window air interface channel load, and calculating the channel load numerical value of the target air interface channel waveform, wherein the load technology type comprises a frequency hopping/time hopping waveform and a spread spectrum waveform;
and determining whether to transmit the shared air interface channel waveform according to the calculated channel load value and the load technology type.
Preferably, the step of determining whether to transmit the shared air interface channel waveform according to the calculated channel load value and the load technology type further includes:
comparing the calculated channel load data with a preset threshold, and determining whether to transmit target data according to a comparison result;
when the channel load data is confirmed to be smaller than or equal to a preset threshold, transmitting a shared air interface channel waveform;
and when the channel load data is confirmed to be larger than the preset threshold, replacing the transmitting window and then re-executing the step of calculating the channel load value of the replaced transmitting window.
In addition, in order to achieve the above object, the present invention further provides a multi-waveform ad hoc network transceiver device, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program when executed by the processor implementing the steps of the multi-waveform ad hoc network transceiving method as described above.
The invention also provides a computer readable storage medium, on which a multi-waveform ad hoc network transceiving application program is stored, and when being executed by a processor, the multi-waveform ad hoc network transceiving application program realizes the steps of the multi-waveform ad hoc network transceiving method.
The multi-waveform ad hoc network transceiving method provided by the embodiment of the invention is based on the current ad hoc network, and when receiving an application type switching instruction of an air interface channel waveform, the application type of the application type switching instruction is confirmed, wherein the application type comprises an exclusive air interface channel and a shared air interface channel; when the application type of the application type switching instruction is confirmed to be an exclusive air interface channel, switching the application state of the target air interface channel waveform into an exclusive air interface channel waveform; and when the application type of the application type switching instruction is determined to be the shared air interface channel, switching the application state of the target air interface channel waveform to the shared air interface channel waveform. The occupation state of the current empty channel waveform of the received transceiving data is correspondingly switched according to the data transmitting state of the received transceiving data, so that the application state switching of multiple waveforms of the ad hoc network is realized, and the beneficial effects of high spectrum efficiency and rapid movement of a transmitting node are simultaneously met.
Drawings
FIG. 1 is a schematic diagram of a terminal \ device structure of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a multi-waveform ad hoc network transceiving method according to a first embodiment of the present invention;
FIG. 3 is a diagram of the architecture of an ad hoc network wireless transceiver;
fig. 4.1 is a schematic diagram of node connection of a multi-waveform ad hoc network;
fig. 4.2 is a schematic diagram of channel waveform application information of nodes of the multi-waveform ad hoc network based on a time axis;
FIG. 5 is a diagram of an exclusive channel waveform;
FIG. 6 is a diagram of a time hopping shared channel waveform;
FIG. 7 is a schematic diagram of a time hopping, frequency hopping shared channel waveform;
FIG. 8 is a diagram illustrating mutual interference between two common channel waveforms;
FIG. 9 is a schematic diagram of a spread spectrum shared channel waveform;
FIG. 10 is a schematic diagram of collision types for exclusive channel waveforms;
FIG. 11 is a diagram of a heavily loaded time-hopping, frequency-hopping waveform;
FIG. 12 is a schematic diagram of a heavily loaded spread spectrum waveform;
fig. 13 is a diagram illustrating node broadcast content.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows: when an application type switching instruction of an air interface channel waveform is received, confirming the application type of the application type switching instruction, wherein the application type comprises an exclusive air interface channel and a shared air interface channel; when the application type of the application type switching instruction is confirmed to be an exclusive air interface channel, switching the application state of the target air interface channel waveform into an exclusive air interface channel waveform; and when the application type of the application type switching instruction is determined to be the shared air interface channel, switching the application state of the target air interface channel waveform to the shared air interface channel waveform.
Because the existing ad hoc network scheduling mode includes CSMA, TDMA and frequency hopping, and the CSMA and TDMA scheduling mode usually uses waveforms of exclusive channels such as OFDM, two nodes cannot transmit using the same time-frequency resource. In a CSMA, TDMA, or frequency hopping multiple access manner, a single waveform cannot satisfy the requirements of high spectrum efficiency and fast node movement, or ad hoc communication when the service changes rapidly.
The invention provides a solution, which correspondingly switches the occupation state of the air interface channel waveform of the current transceiving data according to the data transmitting state of the received transceiving data, realizes the application state switching of multiple waveforms of the ad hoc network, and simultaneously meets the beneficial effects of high spectrum efficiency and quick movement of a transmitting node.
As shown in fig. 1, fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention.
The terminal of the embodiment of the invention can be a PC, and can also be a mobile or non-mobile terminal device with an ad hoc network function, such as a smart phone, a tablet computer, a portable computer and the like.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. The communication bus 1002 is used to implement connection communication among these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., a WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001 described previously.
Those skilled in the art will appreciate that the terminal structure shown in fig. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a type of computer storage medium, may include an operating system, a network communication module, a user interface module, and a multi-waveform ad hoc network transceiving application.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and processor 1001 may be configured to invoke the ad hoc network transceiving application of multiple waveforms stored in memory 1005 and perform the following operations:
when an application type switching instruction of an air interface channel waveform is received, confirming the application type of the application type switching instruction, wherein the application type comprises an exclusive air interface channel and a shared air interface channel;
when the application type of the application type switching instruction is confirmed to be an exclusive air interface channel, switching the application state of the target air interface channel waveform into an exclusive air interface channel waveform;
and when the application type of the application type switching instruction is determined to be the shared air interface channel, switching the application state of the target air interface channel waveform to the shared air interface channel waveform.
Further, processor 1001 may invoke the multi-waveform ad hoc network transceiving application stored in memory 1005 and also perform the following operations:
determining a time-frequency resource of a target air interface channel waveform used by a target transmitting node, and checking whether other exclusive air interface channel waveforms using the same time-frequency resource exist in a preset range;
and if not, switching the application state of the target air interface channel waveform into an exclusive air interface channel waveform.
Further, processor 1001 may invoke the multi-waveform ad hoc network transceiving application stored in memory 1005, and also perform the following operations:
generating broadcast information of time-frequency resources based on the target air interface channel waveform of the target transmitting node in a preset format;
and broadcasting the generated broadcast information so that the transmitting node receiving the broadcast information marks the time frequency resource used by the waveform of the target air interface channel as occupied according to the broadcast information.
Further, processor 1001 may invoke the multi-waveform ad hoc network transceiving application stored in memory 1005 and also perform the following operations:
acquiring an air interface channel load of the target transmitting window according to the target transmitting window of the target air interface channel waveform;
and generating broadcast information based on the air interface channel load according to a preset format and playing the broadcast information so that the transmitting node receiving the broadcast information records the air interface channel load of the broadcast information locally.
Further, processor 1001 may invoke the multi-waveform ad hoc network transceiving application stored in memory 1005, and also perform the following operations:
confirming the load technology type of the target transmitting window air interface channel load, and calculating the channel load numerical value of the target air interface channel waveform, wherein the load technology type comprises a frequency hopping/time hopping waveform and a spread spectrum waveform;
and determining whether to transmit the shared air interface channel waveform according to the calculated channel load value and the load technology type.
Further, processor 1001 may invoke the multi-waveform ad hoc network transceiving application stored in memory 1005, and also perform the following operations:
comparing the calculated channel load data with a preset threshold, and determining whether to transmit target data according to a comparison result;
when the channel load data is confirmed to be smaller than or equal to a preset threshold, transmitting a shared air interface channel waveform;
and when the channel load data is confirmed to be larger than a preset threshold, replacing the transmitting window and then re-executing the step of calculating the channel load value of the replaced transmitting window.
Referring to fig. 2, fig. 2 is a schematic flow diagram of a multi-waveform ad hoc network transceiving method according to a first embodiment of the present invention, where the multi-waveform ad hoc network transceiving method includes:
step S10, when receiving an application type switching instruction of an air interface channel waveform, confirming the application type of the application type switching instruction, wherein the application type comprises an exclusive air interface channel and a shared air interface channel;
receiving transceiving data based on a currently constructed ad hoc network, and receiving an application type switching instruction of an air interface channel waveform, wherein the application type switching instruction can be based on that when target transmitting data is received, a current waveform application mode is determined according to a data transmitting state of the target transmitting data, and the application type switching instruction of the air interface channel waveform is initiated. The self-organizing network is a network combining mobile communication and computer network, the information exchange of the network adopts a packet exchange mechanism in the computer network, the user terminal is a portable terminal which can be moved, and each user terminal in the self-organizing network has two functions of a router and a host. As a host, the terminal needs to run various user-oriented applications, such as an editor, a browser, and the like; as a router, a terminal needs to run a corresponding routing protocol, and completes forwarding of data packets and route maintenance work according to a routing policy and a routing table, so that a node is required to implement a proper routing protocol. The object of the ad hoc network routing protocol is fast, accurate and efficient, and it is required to find out accurate and available routing information in as short a time as possible, and adapt to the fast change of the network topology, and at the same time, reduce the introduced extra time delay and the control information for maintaining the routing, and reduce the overhead of the routing protocol, so as to meet the limitations in the aspects of the computing power, the storage space and the power supply of the mobile terminal, etc., and a specific device structure diagram can be seen in fig. 3, and fig. 3 is a device structure diagram of ad hoc network wireless transceiving. The ad hoc network has the transceiving capacity of various waveforms, and includes two types of waveforms, namely a waveform of an exclusive air interface channel and a waveform of a shared air interface channel. Monopolizing the waveform of an air interface channel, and adopting high-order modulation and high code rate to obtain high-frequency spectrum utilization rate because no mutual interference exists; the waveform of the shared air interface channel realizes that a plurality of users transmit signals simultaneously in the same time frequency resource, and ensures that the plurality of users can be demodulated correctly by reducing the collision probability among different user signals, thereby increasing the network capacity. In addition, the transceiving data based on the ad hoc network may be network data transceived via the ad hoc network, the network data being defined as target user data, the data transmission state of the target user data including a continuous transmission state and a discontinuous transmission state, the target user data in the continuous transmission state being continuously applied network data, such as continuously loaded data like video data, music data, etc.; the target user data in the discontinuous transmission state is discontinuous application network data, that is, the network data is reloaded after waiting for a certain time after the network data is loaded once, for example, webpage text loading data.
Step S20, when the application type of the application type switching instruction is confirmed to be an exclusive air interface channel, switching the application state of the target air interface channel waveform into an exclusive air interface channel waveform;
and switching the application state of the current target air interface channel waveform according to the received application type switching instruction. And when the application type switching instruction is confirmed to be an exclusive air interface channel, confirming a corresponding target air interface channel waveform based on the application type switching instruction, and switching the application state of the confirmed target air interface channel waveform into the exclusive air interface channel. In addition, the switching operation of the exclusive air interface channel may be initiated based on a data transmission state of the received and transmitted data received by the current transmitting node, that is, when the network application data state of the target transmitted data is continuous transmitted data, the application state of the current air interface channel waveform is switched to the exclusive air interface channel waveform, so as to allow the target transmitted data to perform continuous receiving and transmitting operations within a target time range, and occupy a maximum usage bandwidth allowed by the air interface channel waveform to implement high-order modulation and high-code-rate data receiving and transmitting. Transceiving data of a network application data state, which continuously transmits data, may be defined as video data or audio data. Monopolizing the waveform of an air interface channel, and adopting high-order modulation and high code rate to obtain high-frequency spectrum utilization rate because mutual interference does not exist; in addition, when it is determined that the target air interface channel waveform is switched to the exclusive air interface channel waveform, the specific switching operation further includes, that is, when it is determined that the application type of the application type switching instruction is the exclusive air interface channel, the step of switching the application state of the target air interface channel waveform to the exclusive air interface channel waveform, which further includes:
determining a time-frequency resource of a target air interface channel waveform used by a target transmitting node, and checking whether other exclusive air interface channel waveforms using the same time-frequency resource exist in a preset range;
and if not, switching the application state of the target air interface channel waveform into an exclusive air interface channel waveform.
For a target air interface channel waveform needing to be switched from an application state to an exclusive air interface channel, a transmitting node of the target air interface channel needs to avoid transmitting by using the same time-frequency resource in a two-hop range. If one node and one-hop neighbor nodes adopt the same time-frequency resource to transmit the exclusive air interface channel waveform, transceiving conflict exists, namely the node cannot receive the exclusive air interface channel waveform at the same time of transmitting the exclusive air interface channel waveform. If one node and two-hop neighbor nodes adopt the same time-frequency resource to transmit exclusive air interface channel waveforms, receiving conflict exists, namely two nodes transmit simultaneously and collide with each other, so that other nodes cannot correctly demodulate signals of the two nodes. When the application state of switching the current exclusive air interface channel waveform is exclusive, a target transceiving node occupied by target user data in the air interface channel waveform needs to be confirmed, and in order to ensure that the target transceiving node is not applied by other user data when receiving and transmitting the target user data, the target transceiving node and an adjacent transmitting node in a preset range are divided into exclusive nodes so that the current target transmitting data is applied to the target transceiving node and the adjacent node in the preset range. The predetermined range is defined in the art as a node in a unit of hop, for example, as described above, a node in a two-hop range is defined as a neighboring transmitting node of the target transceiver node.
Based on a target air interface channel waveform to be switched to an exclusive air interface channel waveform, when the target air interface channel waveform is switched to exclusive, a time-frequency resource of a transmitting node of the target air interface channel also needs to be marked, that is, if the target air interface channel waveform does not exist, the step of switching the application state of the target air interface channel waveform to the exclusive air interface channel waveform further comprises the following steps:
generating broadcast information of time-frequency resources based on the target air interface channel waveform of the target transmitting node in a preset format;
and broadcasting the generated broadcast information so that the transmitting node receiving the broadcast information marks the time frequency resource used by the waveform of the target air interface channel as occupied according to the broadcast information.
And confirming the application time frequency resource of the target transmitting node according to the confirmed target transmitting node to be switched to the exclusive air interface channel waveform. And generating broadcast information based on the confirmed application time-frequency resource in a preset format, and broadcasting the broadcast information to the transmitting node to which the target air interface channel waveform belongs, so that after the transmitting node to which the target air interface channel waveform belongs receives the broadcast information, the current time-frequency resource is marked as occupied according to the time-frequency resource information contained in the broadcast information, namely, the time-frequency resource of the transmitting node which is switched to the target air interface channel waveform exclusive to the air interface channel waveform is marked as occupied through the broadcast information, and the influence of the occupation of other transmitting nodes on the time-frequency resource application of the transmitting node is avoided. The preset format is a standard broadcast information format based on the time-frequency resource of the transmitting node.
And step S30, when the application type of the application type switching instruction is determined to be the shared air interface channel, switching the application state of the target air interface channel waveform to the shared air interface channel waveform.
And switching the application state of the current target air interface channel waveform according to the received application type switching instruction. And when the application type switching instruction is confirmed to be the shared air interface channel, confirming a corresponding target air interface channel waveform based on the application type switching instruction, and switching the application state of the confirmed target air interface channel waveform to be the shared air interface channel. In addition, the switching operation of the shared air interface channel may be initiated based on a data transmission state of the received and transmitted data received by the current transmitting node, that is, when the network application data state of the target transmitted data is discontinuous transmitted data, the application state of the current air interface channel waveform is switched to the shared air interface channel waveform. When the data transmission state of the target transmission data is discontinuous transmission, the data transmission state of the target transmission data is determined to be discontinuous transmission when the target transmission data is webpage browsing data. And switching the application state of the target air interface channel waveform into a shared air interface channel waveform according to the confirmed target air interface channel waveform so as to allow the target transmitting data to carry out discontinuous transceiving operation in a target time range. In practical application, the waveform of the shared air interface channel realizes that a plurality of users in the same time frequency resource transmit signals simultaneously, and the correct demodulation of the plurality of users is ensured by reducing the collision probability among different user signals, thereby increasing the network capacity.
In addition, the step of switching the application state of the target air interface channel waveform to the shared air interface channel waveform when it is determined that the application type of the application type switching instruction is the shared air interface channel further includes:
acquiring an air interface channel load of the target transmitting window according to the target transmitting window of the target air interface channel waveform;
and generating broadcast information based on the air interface channel load according to a preset format and playing the broadcast information so that the transmitting node receiving the broadcast information records the air interface channel load of the broadcast information locally.
In order to ensure the correct demodulation of the shared air interface channel waveform, the transmitting node and the adjacent node within a hop range only need to broadcast the air interface channel load of the waveform occupying time to the outside. Therefore, the air interface channel load in the occupied time based on the current target transmitting node and the adjacent transmitting node is obtained, wherein the air interface channel load refers to the lifting of the bottom noise when the spread spectrum technology is used; the ratio of occupied time slots to all available time slots when using time hopping techniques; the ratio of occupied frequency band to the total available frequency band when using frequency hopping techniques. After the node detects the waveform of the shared air interface channel, whether to transmit or not is determined according to the network load condition. When a spread spectrum waveform is adopted, the transmission can be carried out only when the rise of the background noise is smaller than a threshold; when time hopping or frequency hopping waveforms are adopted, the ratio of occupied time slots to all time slots is smaller than a threshold, or the ratio of occupied frequency bands to all available frequency bands is smaller than the threshold, and then the transmission can be carried out. And according to the acquired air interface channel load, initiating broadcast information based on the air interface channel load to a transmitting node to which the target air interface channel waveform belongs in a preset format, so that the transmitting node receiving the broadcast information records locally according to the air interface channel load information contained in the broadcast information.
Further, the step of acquiring the air interface channel load of the target transmission window according to the target transmission window of the target air interface channel waveform further includes:
confirming the load technology type of the target transmitting window air interface channel load, and calculating the channel load value of the target air interface channel waveform, wherein the load technology type comprises a frequency hopping/time hopping waveform and a spread spectrum waveform;
and determining whether to transmit the shared air interface channel waveform according to the calculated channel load value and the load technology type.
For a waveform of a shared air interface channel, a transmitting node and a preset range of the transmitting node can be defined as that other nodes in a two-hop range can transmit by using the same time-frequency resource, but the collision probability with the waveform needs to be smaller than a threshold. That is, the ratio of the interfered transmission signal to all transmission signals of the shared air interface channel waveform in the whole transmission window needs to be smaller than the threshold. Thereby ensuring correct demodulation probability.
And detecting the receiving operation of other transceiving data except the target transmitting data based on the receiving operation of the current target transmitting data, and reducing the probability of signal interference by randomizing a transmitting time slot or a transmitting frequency band for time hopping and frequency hopping waveforms by considering the transceiving operation of the target transmitting data and the current shared node. When too many users transmit time hopping or frequency hopping waveforms simultaneously, idle time frequency resources are reduced, and the probability of transmission collision is increased. Although each transmission uses different time-frequency resources, there is still a high probability of collision, so that correct demodulation cannot be achieved. For a spread spectrum waveform, it is necessary to ensure that the spread spectrum gain is greater than the rise of the noise floor. When too many users transmit spread spectrum waveforms at the same time, the signal superposition causes more noise rise, and at the moment, if the spread spectrum gain is not enough, the power of the despread signal is still lower than that of the noise, and the signal cannot be demodulated correctly. Based on the detected transmitting nodes which transmit and receive data except the target transmitting data, calculating the channel load value of the transmitting nodes and the sharing nodes of the currently applied target transmitting data, wherein the channel load value is defined as the raised noise floor when the spread spectrum technology is used; the ratio of occupied time slots to all available time slots when the time hopping technology is used, and the ratio of occupied frequency bands to all available frequency bands when the frequency hopping technology is used; therefore, based on the definition mode, the channel load value calculation mode of the sharing node and the current application node is not described herein for the prior art. As described above, according to the calculated channel load value, when it is determined that the channel load value is smaller than the preset threshold, it is determined that correct demodulation of the shared air interface channel waveform can be currently guaranteed, and a data transceiving operation based on current transceiving data is performed.
As described above, the step of determining whether to transmit the target transmission data of the shared air interface channel waveform based on the current channel load data and the load technology type, that is, determining whether to transmit the shared air interface channel waveform according to the calculated channel load value and the load technology type, further includes:
comparing the calculated channel load data with a preset threshold, and determining whether to transmit target data according to a comparison result;
when the channel load data is confirmed to be less than or equal to a preset threshold, transmitting a shared air interface channel waveform;
and when the channel load data is confirmed to be larger than the preset threshold, replacing the transmitting window and then re-executing the step of calculating the channel load value of the replaced transmitting window.
Comparing the calculated channel load data with a preset threshold, wherein the preset threshold is an upper limit value of the channel load data which can be borne by a transmitting node of the current air interface channel waveform, and therefore, when the channel load data is determined to be less than or equal to the preset threshold, target transmitting data of the transmitting node of the shared air interface channel waveform is transmitted based on the shared application state of the target air interface channel waveform; and when the channel load data is confirmed to be larger than the preset threshold, replacing the transmitting window of the current shared air interface channel waveform, and recalculating the channel load value of the transmitting window to be compared with the preset threshold so as to confirm the data transmission of the shared air interface channel waveform.
As in step S20 and step S30, in practical applications, the embodiments of the present invention can be described with reference to the following drawings. As shown in fig. 4.1 and 4.2, fig. 4.1 is a schematic node connection diagram of a multi-waveform ad hoc network, which is an ad hoc network formed by 5 nodes, and a connection line indicates that a communication link exists between two nodes. From node 1, nodes 2, 3 are one-hop neighbors, and nodes 4, 5 are two-hop neighbors. The nodes in the multi-waveform ad hoc network support the transceiving of various waveforms, and specifically comprise two types of waveforms, namely a waveform of an exclusive air interface channel and a waveform of a shared air interface channel. Fig. 4.2 is a schematic diagram of channel waveform application information of nodes of the multi-waveform ad hoc network based on a time axis, and waveforms of air interface channels are monopolized, because mutual interference does not exist, high-order modulation and high code rate can be adopted, so that high-frequency spectrum utilization rate is obtained; the waveform of the shared air interface channel realizes that a plurality of users transmit signals simultaneously in the same time frequency resource, and ensures that the plurality of users can be demodulated correctly by reducing the collision probability among different user signals, thereby increasing the network capacity. The node determines the type of the transmitted waveform according to the service requirement of the node. For example, node 1 has data with a large code stream to transmit, so an exclusive channel waveform is adopted, and the time-frequency resource occupied by the waveform cannot be used by other nodes for transmission. Nodes 2-5 only need to transmit small code stream data, but the time delay requirement is higher, so shared channel waveforms are adopted. The transmission windows of the plurality of nodes may overlap each other.
Fig. 5 is a schematic diagram of an exclusive channel waveform, that is, within a transmission time window, all time-frequency resources are occupied for transmission within an allowed maximum occupied bandwidth. At this time, as long as there is another node transmitting using the time-frequency resource or a part of the time-frequency resource, the receiving and demodulation of the exclusive channel waveform will be affected. Fig. 6 is a schematic diagram of a time hopping shared channel waveform, that is, within a transmission time window, within an allowed maximum occupied bandwidth, a part of time resources are occupied for transmission, and the occupied time resources are not periodic but randomly distributed within the whole transmission window. At this time, if other nodes also adopt the time hopping shared channel waveform for transmission, because the transmission time slots of the two nodes are randomly distributed in the transmission window, all the transmission time slots cannot collide. When the collision probability is lower than the threshold, correct receiving demodulation can be ensured through forward error correction, as shown in the figure, the 1 st node of the node 1 transmission time slot and the node 2 transmission time slot has transceiving collision, and the 3 rd node of the node 1 transmission time slot and the node 4 transmission time slot has transceiving collision. Fig. 7 is a schematic diagram of a shared channel waveform with simultaneous time hopping and frequency hopping, that is, within a transmission time window, only a part of time frequency resources are occupied for transmission within an allowed maximum occupied bandwidth. As shown in fig. 8, fig. 8 is a schematic diagram of mutual interference between two shared channel waveforms, and if other nodes also transmit using time hopping and frequency hopping shared channel waveforms, because the transmission time-frequency resources of two users are randomly distributed in the whole transmission window, only a small portion of the transmission time-frequency resources collide, and correct reception and demodulation can be ensured by forward error correction.
Fig. 9 is a diagram of a spread spectrum shared channel waveform, where user data is spread and transmitted over a wider frequency band or longer time. After the target user is despread, the target user obtains the spread spectrum gain, while other interference users cannot obtain the spread spectrum gain because of different spread spectrum codes, and the interference is equivalent to the rise of thermal noise. The demodulation signal-to-noise ratio of the target user obtaining the spread spectrum gain is improved, so that the correct demodulation can be realized.
Referring to fig. 10, fig. 10 is a diagram illustrating collision types of exclusive channel waveforms. When both nodes 1 and 2 adopt time slot 1 for transmission, because node 2 is a one-hop neighbor node of node 1, in the half-duplex mode, node 2 transmits in time slot 1, and at this time, data transmitted by node 1 at the same time cannot be received. Another type of collision is from the transmitting node and the two-hop neighbor nodes. When the nodes 1 and 4 adopt the time slot 3 for transmission, the node 2 receives the data of the nodes 1 and 4 at the same time in the time slot 3, and the exclusive channel waveform cannot be correctly demodulated when all or part of time frequency resources are interfered, so that the node 2 cannot demodulate the data of the nodes 1 and 4. In order to avoid transmitting the exclusive channel waveform in the same time frequency resource in the two-hop range, the transmitting node and the one-hop neighbor node need to forward the time frequency resource occupied by the waveform. Based on fig. 10, a schematic node connection diagram of the multi-waveform ad hoc network based on fig. 4.1. If node 1 transmits an exclusive channel waveform in a certain block of time-frequency resources, nodes 1, 2, and 3 all need to broadcast the time-frequency resources occupied by the waveform. After receiving the broadcast information, the nodes 2, 3, 4, 5 need to avoid any transmission in the time-frequency resource.
For a shared channel waveform, a transmitting node and a neighboring node within a one-hop range only need to broadcast the empty channel load of the waveform occupying time to the outside. The air interface channel load refers to: the bottom noise is raised when the spread spectrum technology is used; the ratio of occupied time slots to all available time slots when using time hopping techniques; the ratio of occupied frequency band to the total available frequency band when using frequency hopping techniques. Referring to fig. 11, fig. 11 is a diagram illustrating a heavily loaded time-hopping, frequency-hopping waveform. And the transmission time window and the allowable maximum bandwidth form all the time frequency resources, if the idle parts in all the time frequency resources are less, the time frequency resources are considered to be heavy load, and otherwise, the time frequency resources are light load. Fig. 12 is a schematic diagram of a spreading waveform with heavy load, as shown in fig. 12. When many users transmit simultaneously by using spread spectrum waveforms, even if each user uses different spread spectrum codes, the superimposed interference power is still high, and if the interference power exceeds the spread spectrum gain, the target user still cannot demodulate correctly even if the spread spectrum gain after despreading is obtained. Therefore, for the shared channel waveform, the load in the waveform transmission time window needs to be strictly controlled, and when the spread spectrum waveform is adopted, the transmission can be performed only if the bottom noise rise is smaller than the threshold; when time hopping or frequency hopping waveforms are adopted, the ratio of occupied time frequency resources to all available time frequency resources is smaller than a threshold, and then the transmission can be carried out.
Fig. 13 is a diagram illustrating node broadcast content. During the duration of one frame, the node needs to broadcast the transmission time window occupied by the exclusive channel waveform, and other time is divided into several segments, and the load of the shared channel waveform of each segment is counted and broadcast. Before the node transmits the shared channel waveform, the load of the shared channel waveform monitored by the node and the shared channel waveform monitored by a one-hop neighbor node needs to be evaluated, and the shared channel waveform can be transmitted only when the load is smaller than a threshold.
In this embodiment, the occupied state of the air interface channel waveform of the current transceiving data is switched correspondingly according to the data transmitting state of the received transceiving data, so that application state switching of multiple waveforms of the ad hoc network is realized, and the beneficial effects of high spectrum efficiency and rapid movement of the transmitting node are met.
In addition, an embodiment of the present invention further provides a computer-readable storage medium, where an ad hoc network transceiving application with multiple waveforms is stored on the computer-readable storage medium, and when executed by a processor, the ad hoc network transceiving application with multiple waveforms implements the following operations:
when an application type switching instruction of an air interface channel waveform is received, confirming the application type of the application type switching instruction, wherein the application type comprises an exclusive air interface channel and a shared air interface channel;
when the application type of the application type switching instruction is confirmed to be an exclusive air interface channel, switching the application state of the target air interface channel waveform into an exclusive air interface channel waveform;
and when the application type of the application type switching instruction is determined to be the shared air interface channel, switching the application state of the target air interface channel waveform to the shared air interface channel waveform.
Further, the ad hoc network transceiving application program with multiple waveforms, when executed by the processor, further implements the following operations:
determining a time-frequency resource of a target air interface channel waveform used by a target transmitting node, and checking whether other exclusive air interface channel waveforms using the same time-frequency resource exist in a preset range;
and if not, switching the application state of the target air interface channel waveform into an exclusive air interface channel waveform.
Further, the ad hoc network transceiving application program with multiple waveforms, when executed by the processor, further implements the following operations:
generating broadcast information of time-frequency resources based on the target air interface channel waveform of the target transmitting node in a preset format;
and broadcasting the generated broadcast information so that the transmitting node receiving the broadcast information marks the time frequency resource used by the waveform of the target air interface channel as occupied according to the broadcast information.
Further, the ad hoc network transceiving application program with multiple waveforms, when executed by the processor, further implements the following operations:
acquiring an air interface channel load of the target transmitting window according to the target transmitting window of the target air interface channel waveform;
and generating broadcast information based on the air interface channel load according to a preset format and playing the broadcast information so that the transmitting node receiving the broadcast information records the air interface channel load of the broadcast information locally.
Further, the ad hoc network transceiving application program with multiple waveforms, when executed by the processor, further implements the following operations:
confirming the load technology type of the target transmitting window air interface channel load, and calculating the channel load numerical value of the target air interface channel waveform, wherein the load technology type comprises a frequency hopping/time hopping waveform and a spread spectrum waveform;
and determining whether to transmit the shared air interface channel waveform according to the calculated channel load value and the load technology type.
Further, the ad hoc network transceiving application program with multiple waveforms, when executed by the processor, further implements the following operations:
comparing the calculated channel load data with a preset threshold, and determining whether to transmit target data according to a comparison result;
when the channel load data is confirmed to be less than or equal to a preset threshold, transmitting a shared air interface channel waveform;
and when the channel load data is confirmed to be larger than the preset threshold, replacing the transmitting window and then re-executing the step of calculating the channel load value of the replaced transmitting window.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, pharmaceutical, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention or the portions contributing to the prior art may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) as described above and includes several instructions for enabling a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A multi-waveform ad hoc network transceiving method is characterized by comprising the following steps:
when receiving an application type switching instruction of an air interface channel waveform, confirming the application type of the application type switching instruction, wherein the application type comprises an exclusive air interface channel and a shared air interface channel, and when receiving target transmitting data, determining a current waveform application mode according to the data transmitting state of the target transmitting data and initiating the application type switching instruction of the air interface channel waveform;
when the application type of the application type switching instruction is confirmed to be an exclusive air interface channel, determining a time-frequency resource of a target air interface channel waveform used by a target transmitting node, and checking whether other exclusive air interface channel waveforms using the same time-frequency resource exist in a preset range;
if not, switching the application state of the target air interface channel waveform into an exclusive air interface channel waveform;
when the application type of the application type switching instruction is determined to be a shared air interface channel, acquiring an air interface channel load of a target transmitting window according to the target transmitting window of the target air interface channel waveform; confirming the load technology type of the air interface channel load, and calculating the channel load value of the target air interface channel waveform, wherein the load technology type comprises a frequency hopping/time hopping waveform and a spread spectrum waveform;
comparing the calculated channel load data with a preset threshold, and transmitting a shared air interface channel waveform when the channel load data is confirmed to be less than or equal to the preset threshold;
and switching the application state of the target air interface channel waveform to the shared air interface channel waveform.
2. The method for multi-waveform ad hoc network transceiving according to claim 1, wherein if not, the step of switching the application state of the target air interface channel waveform to an exclusive air interface channel waveform further comprises:
generating broadcast information of time-frequency resources based on the target air interface channel waveform of the target transmitting node in a preset format;
and broadcasting the generated broadcast information so that the transmitting node receiving the broadcast information marks the time frequency resource used by the waveform of the target air interface channel as occupied according to the broadcast information.
3. The method for transceiving a multi-waveform ad hoc network according to claim 1, wherein after the step of obtaining an air interface channel load of the target transmission window according to the target transmission window of the target air interface channel waveform when it is determined that the application type of the application type switching instruction is a shared air interface channel, the method further comprises:
and generating broadcast information based on the air interface channel load according to a preset format and playing the broadcast information so that the transmitting node receiving the broadcast information records the air interface channel load of the broadcast information locally.
4. The method for multi-waveform ad hoc network transceiving of claim 1, wherein after the step of determining the loading technology type of the air interface channel load and calculating the channel load value of the target air interface channel waveform, the method further comprises:
and comparing the calculated channel load data with a preset threshold, and replacing the transmitting window and then re-executing the step of calculating the channel load value of the replaced transmitting window when the channel load data is confirmed to be larger than the preset threshold.
5. A multi-waveform ad hoc network transceiver device, comprising: a memory, a processor and a multi-waveform ad hoc network transceiving program stored on the memory and operable on the processor, the multi-waveform ad hoc network transceiving program when executed by the processor implementing the steps of the multi-waveform ad hoc network transceiving method according to any one of claims 1 to 4.
6. A computer readable storage medium having stored thereon a multi-waveform ad-hoc network transceiving application, the multi-waveform ad-hoc network transceiving application when executed by a processor implementing the steps of the multi-waveform ad-hoc network transceiving method according to any one of claims 1 to 4.
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