CN115499935A - Simultaneous same-frequency full-duplex dual-polarization ad hoc network access system and method based on double token buses - Google Patents

Abstract

The present invention proposes a simultaneous same-frequency full-duplex dual-polarization ad-hoc network access system and access method based on a dual-token bus. Each node is equipped with two antennas, and the polarization mode and transceiver mode of the antenna All can be changed, there are 2 tokens in the network, only the node holding the token can access the channel to send data, any node in the network can directly communicate with other nodes and know all node IDs or IPs in the network; the present invention It can give full play to the advantages of simultaneous and same-frequency full-duplex technology. The dual-polarized antenna method can effectively avoid interference between nodes, and the dual-token bus access method can effectively avoid collisions. The invention can be used for fully distributed autonomous The entire network MAC access of the networking or the MAC access of each layer (cluster) in the layered (cluster) ad hoc network.

Description

A Simultaneous Same Frequency Full Duplex Dual Polarization Ad Hoc Network Access System Based on Dual Token Bus system and access method

technical field

The invention belongs to the technical field of ad hoc network technology, and in particular relates to a simultaneous same-frequency full-duplex dual-polarization ad hoc network access system and an access method based on a dual-token bus.

Background technique

Due to its advantages of flexible networking and no need for communication infrastructure support, wireless ad hoc networks are widely used in various scenarios and are one of the important topics of current research. Polarized antenna technology is also increasingly mature, and its advantages of wide communication range and low energy consumption provide conditions for its introduction into wireless ad hoc networks.

To achieve large-scale user data access and high-speed data transmission, it is necessary to make full use of limited spectrum resources. Simultaneous same-frequency full-duplex technology, as a research hotspot in current wireless communication and one of the key technologies of 5G, can use the same frequency to send and receive data signals at the same time, which can theoretically double the spectrum utilization rate, so that Effectively solve the problem of shortage of spectrum resources, but will face relatively serious interference problems. .

Contents of the invention

The present invention proposes a simultaneous same-frequency full-duplex dual-polarization ad-hoc network access system and access method based on a dual-token bus. On the premise of solving the interference problem, efficient and accurate data transmission is realized, thereby improving network throughput and spectral efficiency.

The present invention is realized through the following technical solutions:

A simultaneous same-frequency full-duplex dual-polarization ad hoc network access system based on dual-token bus:

The ad hoc network access system includes N clusters, and each cluster is composed of 5 nodes, which are respectively 1 cluster head and 4 cluster members;

Each node is equipped with 2 antennas, the antennas are left-handed antennas and right-handed antennas, and the channels are divided into left-handed channels and right-handed channels;

There are 2 tokens in each cluster in the ad hoc network, which are left-handed polarization tokens and right-handed polarization tokens. The nodes holding the tokens access the channel to send data, and all nodes can receive the holding tokens. The data sent by the 2 nodes.

A simultaneous same-frequency full-duplex dual-polarization ad hoc network access method based on a dual-token bus:

Described method specifically comprises the following steps:

Step 1. The two antennas of all nodes are initialized to receive mode, one of which is left-handed and the other is right-handed;

Step 2. The left-handed polarization channel transfers tokens in ascending order of node ID or IP, and the node with the smallest ID or IP holds the token first; the right-handed polarization channel transfers tokens in descending order of node ID or IP, and the node with the largest ID or IP Be the first to hold the token;

Step 3. The node holding the left-handed polarization token transmits the left-handed polarization of the antenna, the receiving antenna is right-handed, and sends data through the left-handed transmitting antenna; the node holding the right-handed polarization token The antenna is left-handed and polarized, and the data is sent through the right-handed transmitting antenna to complete the simultaneous same-frequency full-duplex dual-polarization ad hoc network access of the dual-token bus.

Furthermore, nodes holding left-handed polarization tokens and nodes holding right-handed polarization tokens can simultaneously send data at the same frequency without interfering with each other.

Furthermore, at any moment of network access, all nodes can receive the data sent by the two nodes holding tokens.

Further, the two antennas of a node without a token are both in receiving mode, and the left-handed antenna and the right-handed antenna are respectively left-handed and right-handed.

Further, in step 2, specifically:

In the first time slot, the node with the smallest ID or IP holds left-handed polarization tokens, and the node with the largest ID or IP holds right-handed polarization tokens;

In the second time slot, left-handed polarization tokens are passed in ascending order of ID, and right-handed polarization tokens are passed in descending order of ID;

Subsequent slots proceed in this order.

Further, the method also includes node maintenance:

The left-handed polarization token is maintained by the node with the smallest ID or IP in the network, and the right-handed polarization token is maintained by the node with the largest ID or IP in the network.

Further, the specific maintenance method is: when a certain token in the network is lost, that is, when no node uses the corresponding polarization method to send data within a token transfer cycle, the node responsible for maintenance regenerates the token and transfers it.

An electronic device includes a memory and a processor, the memory stores a computer program, and the processor implements the steps of any one of the methods described above when executing the computer program.

A computer-readable storage medium is used for storing computer instructions, and when the computer instructions are executed by a processor, the steps of any one of the methods described above are implemented.

Beneficial effect of the present invention

The present invention designs a MAC layer access method of a dual-token bus based on the simultaneous same-frequency full-duplex dual-polarized antenna ad hoc network;

This access method can give full play to the advantages of simultaneous and same-frequency full-duplex technology, the use of dual-polarized antennas can effectively avoid interference between nodes, and the access method of dual token buses can effectively avoid collisions;

The present invention can be used for the MAC access of the whole network of the fully distributed ad hoc network or the MAC access of each layer (cluster) in the layered (cluster) ad hoc network.

Description of drawings

Fig. 1 is each node and token state diagram of the 1st time slot of the present invention;

Fig. 2 is a state diagram of nodes and tokens in the second time slot of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Each node is equipped with 2 antennas, and the polarization and sending and receiving modes of the antenna can be changed. There are 2 tokens in the network, and only nodes holding tokens can access the channel to send data. Assuming any node in the network They can communicate directly with other nodes and know all node IDs or IPs in the network.

A simultaneous same-frequency full-duplex dual-polarization ad hoc network access system based on dual-token bus:

The ad hoc network access system includes N clusters, and each cluster is composed of 5 nodes, which are respectively 1 cluster head and 4 cluster members;

Each node is equipped with 2 antennas, the antennas are left-handed antennas and right-handed antennas, and the channels are divided into left-handed channels and right-handed channels;

There are 2 tokens in each cluster in the ad hoc network, which are left-handed polarization tokens and right-handed polarization tokens. The nodes holding the tokens access the channel to send data, and all nodes can receive the holding tokens. The data sent by the 2 nodes.

A simultaneous same-frequency full-duplex dual-polarization ad hoc network access method based on a dual-token bus:

Described method specifically comprises the following steps:

Step 1. The two antennas of all nodes are initialized to receive mode, one of which is left-handed and the other is right-handed;

Step 2. The left-handed polarization channel transfers tokens in ascending order of node ID or IP, and the node with the smallest ID or IP holds the token first; the right-handed polarization channel transfers tokens in descending order of node ID or IP, and the node with the largest ID or IP Hold the token first (non-unique setting);

Step 3. The node holding the left-handed polarization token transmits the left-handed polarization of the antenna, the receiving antenna is right-handed, and sends data through the left-handed transmitting antenna; the node holding the right-handed polarization token The antenna is left-handed and polarized, and the data is sent through the right-handed transmitting antenna to complete the simultaneous same-frequency full-duplex dual-polarization ad hoc network access of the dual-token bus.

Nodes holding left-handed polarization tokens and nodes holding right-handed polarization tokens can simultaneously send data at the same frequency without interfering with each other.

At any moment of network access, all nodes (including the two nodes holding the token) can receive the data sent by the two nodes holding the token.

The two antennas of the node without a token are both receiving modes, and the left-handed antenna and the right-handed antenna are respectively left-handed and right-handed.

In step two, specifically:

In the first time slot, the node with the smallest ID or IP holds left-handed polarization tokens, and the node with the largest ID or IP holds right-handed polarization tokens;

In the second time slot, left-handed polarization tokens are passed in ascending order of ID, and right-handed polarization tokens are passed in descending order of ID;

Subsequent slots proceed in this order.

The method also includes node maintenance:

The left-handed polarization token is maintained by the node with the smallest ID or IP in the network, and the right-handed polarization token is maintained by the node with the largest ID or IP in the network.

The specific maintenance method is as follows: when a certain token in the network is lost, that is, when no node uses the corresponding polarization mode to send data within a token transmission period, the node responsible for maintenance regenerates the token and transmits it.

Taking a certain cluster in the ad hoc network as an example below, the working process of the present invention will be described.

(1) Each cluster consists of 5 nodes, all equipped with left-handed antennas and right-handed antennas, and the channels are divided into left-handed channels and right-handed channels. At the initial moment, both antennas of all nodes are in receiving mode.

(2) In the first time slot, the node with the smallest ID holds the left-handed polarization token, and the node with the largest ID holds the right-handed polarization token. As shown in Figure 1, the node holding the token can access the channel to send Data, all nodes (including the node holding the token) can receive the data sent by the two nodes holding the token.

(3) In the next time slot, left-handed polarization tokens are passed in ascending order of ID, and right-handed polarization tokens are passed in descending order of ID. As shown in Figure 2, nodes holding tokens can access the channel to send data, and all Nodes (including nodes holding tokens) can receive the data sent by the two nodes holding tokens.

(4) Subsequent time slots are performed in this order.

(5) The left-handed polarization token is maintained by the node with the smallest ID in the network, and the right-handed polarization token is maintained by the node with the largest ID in the network.

An electronic device includes a memory and a processor, the memory stores a computer program, and the processor implements the steps of any one of the methods described above when executing the computer program.

A computer-readable storage medium is used for storing computer instructions, and when the computer instructions are executed by a processor, the steps of any one of the methods described above are implemented.

The memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Among them, the non-volatile memory can be read only memory (read only memory, ROM), programmable read only memory (programmable ROM, PROM), erasable programmable read only memory (erasable PROM, EPROM), electrically erasable Programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM ), double data rate synchronous dynamic random access memory (double datarate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) and direct Memory bus random access memory (direct rambusRAM, DR RAM). It should be noted that the memory of the methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk (solid state disc, SSD)) etc.

In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software. The steps of the methods disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware. To avoid repetition, no detailed description is given here.

It should be noted that the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components . Various methods, steps, and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

The above is a detailed introduction of a simultaneous same-frequency full-duplex dual-polarization ad hoc network access system and access method based on a dual-token bus proposed by the present invention, and the principle and implementation of the present invention are described. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; meanwhile, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims (10)

1. A simultaneously same-frequency full-duplex dual-polarization ad-hoc network access system based on dual-token bus, characterized in that: The ad hoc network access system includes N clusters, and each cluster is composed of 5 nodes, which are respectively 1 cluster head and 4 cluster members; Each node is equipped with 2 antennas, the antennas are left-handed antennas and right-handed antennas, and the channels are divided into left-handed channels and right-handed channels; There are 2 tokens in each cluster in the ad hoc network, which are left-handed polarization tokens and right-handed polarization tokens. The nodes holding the tokens access the channel to send data, and all nodes can receive the holding tokens. The data sent by the 2 nodes. 2. A simultaneous same-frequency full-duplex dual-polarization ad-hoc network access method based on dual-token bus, characterized in that: Described method specifically comprises the following steps: Step 1. The two antennas of all nodes are initialized to receive mode, one of which is left-handed and the other is right-handed; Step 2. The left-handed polarization channel transfers tokens in ascending order of node ID or IP, and the node with the smallest ID or IP holds the token first; the right-handed polarization channel transfers tokens in descending order of node ID or IP, and the node with the largest ID or IP Be the first to hold the token; Step 3. The node holding the left-handed polarization token transmits the left-handed polarization of the antenna, the receiving antenna is right-handed, and sends data through the left-handed transmitting antenna; the node holding the right-handed polarization token The antenna is left-handed and polarized, and the data is sent through the right-handed transmitting antenna to complete the simultaneous same-frequency full-duplex dual-polarization ad hoc network access of the dual-token bus. 3. The method according to claim 2, characterized in that: Nodes holding left-handed polarization tokens and nodes holding right-handed polarization tokens can simultaneously send data at the same frequency without interfering with each other. 4. The method according to claim 3, characterized in that: At any moment of network access, all nodes can receive the data sent by the two nodes holding tokens. 5. The method according to claim 4, characterized in that: The two antennas of the node without a token are both receiving modes, and the left-handed antenna and the right-handed antenna are respectively left-handed and right-handed. 6. The method according to claim 5, characterized in that: In step two, specifically: In the first time slot, the node with the smallest ID or IP holds left-handed polarization tokens, and the node with the largest ID or IP holds right-handed polarization tokens; In the second time slot, left-handed polarization tokens are passed in ascending order of ID, and right-handed polarization tokens are passed in descending order of ID; Subsequent slots proceed in this order. 7. The method according to claim 6, characterized in that: The method also includes node maintenance: The left-handed polarization token is maintained by the node with the smallest ID or IP in the network, and the right-handed polarization token is maintained by the node with the largest ID or IP in the network. 8. The method according to claim 7, characterized in that: The specific maintenance method is as follows: when a certain token in the network is lost, that is, when no node uses the corresponding polarization mode to send data within a token transmission period, the node responsible for maintenance regenerates the token and transmits it. 9. An electronic device, comprising a memory and a processor, the memory stores a computer program, wherein the processor implements the steps of the method according to any one of claims 2 to 8 when executing the computer program . 10. A computer-readable storage medium for storing computer instructions, wherein the steps of the method according to any one of claims 2 to 8 are implemented when the computer instructions are executed by a processor.

Images