CN-122028187-A - Multi-channel Ad hoc network hybrid access method suitable for multi-type service

CN122028187ACN 122028187 ACN122028187 ACN 122028187ACN-122028187-A

Abstract

The invention discloses a multi-channel ad hoc network mixed access method suitable for multi-type services, which comprises the following steps of S1, providing multi-channel mixed access service data through an application data layer, S2, judging that a current service type is processed by a time-sensitive service sending channel I after access data are acquired through a service type identification unit, sending high-rate service into a route decision unit, determining a time-frequency resource division scheme, S3, calculating competition time slots after the time-sensitive service enters the channel I, completing data sending in the corresponding competition time slots, S4, sending the data under the condition of route accessibility into the channel II by combining a topology management unit, carrying out time-frequency resource occupation and data sending by combining the channel I, and S5, completing data receiving-sending conversion processing through a multi-channel physical layer after the time-sensitive service enters the channel I. The invention effectively improves the time slot utilization rate and reduces the transmission time delay of short services such as signaling and the like.

Inventors

MA WANZHI
CHEN RISHENG
LIU DAWEI
SHI ZHOU
LI YAFAN
XIE HAOYUAN

Assignees

电子科技大学
中国兵器科学研究院

Dates

Publication Date: 20260512
Application Date: 20260310

Claims (6)

1. A multi-channel Ad hoc network hybrid access method suitable for multi-type services is characterized by comprising the following steps: S1, providing service data of multi-channel hybrid access through an application data layer; S2, after obtaining access data through a service type identification unit, judging the current service type, dividing the current service type into time-sensitive service and high-rate service, and making corresponding operations, namely Shi Min the service is sent to a first channel for processing, shi Min the high-rate service is sent to a route decision unit, and determining a time-frequency resource division scheme, S3, after the time-sensitive service enters the first channel, calculating a competition time slot, and completing data transmission in the corresponding competition time slot; s4, after the high-rate service enters a route decision unit, judging the route accessibility by combining a topology management unit, sending data under the condition that the route is reachable into a channel two, and carrying out time-frequency resource occupation and data issuing by combining the channel one; And S5, completing the receiving and transmitting conversion processing of the data through the multichannel physical layer.
2. The method of claim 1, wherein the service data of the multi-channel hybrid access is an externally input data packet with different types and different lengths.
3. The method for multi-channel ad hoc network hybrid access for multi-type services according to claim 1, wherein the time-frequency resource division scheme is as follows: In the first channel, each channel period comprises 2N time slots, wherein N time slots are service time slots, and the other N time slots are competing time slots; In the second channel, each channel period contains 2N time slots, which are service time slots, and the reserved time slots are reserved by the source node and the destination node and cannot be reused by the adjacent nodes, so that the nodes waiting for the occupied time slots release.
4. The method for multi-channel ad hoc network hybrid access for multi-type services according to claim 1, wherein said step S3 comprises: After Shi Min business enters the first channel, calculating the next transmittable competition time slot corresponding to the node by a competition time slot calculation unit, and forwarding the calculation result and the original data to a time-sensitive business transmission unit; the Shi Min service sending unit is responsible for submitting the data to the unified channel-sending unit for issuing when the sent competition time slot is about to come.
5. The method of claim 1, wherein in step S4, the data in the case of reachable route is sent to the second channel, and the time-frequency resource occupation and data transmission are performed in combination with the first channel, comprising: S401, after data under the condition of route accessibility enter a second channel, after a to-be-transmitted high-rate service is acquired through a time-frequency resource management unit in the second channel, reservation occupation of a service time slot is finished before transmission is started, and when the service time slot is not occupied, an RTS request frame reserved and occupied by the service time slot is transferred to a service sending unit in the first channel; The time-frequency resource management unit receives the RTS request frame reported by the service processing feedback unit from the feedback part and also forwards the corresponding CTS request frame to the service sending unit in the channel I for issuing; S402, after the service sending unit obtains an RTS request frame to be transmitted, the service sending unit is responsible for submitting data to a unified channel-sending unit for issuing when a sent competition time slot is about to come; S403, when confirming that a CTS response frame is received or a service time slot is occupied, the time-frequency resource management unit forwards the high-speed service to be transmitted to a high-speed service sending unit in a channel II; S404, the high-speed service sending unit is responsible for delivering data to the unified channel two sending unit for issuing when a sent service time slot is about to come; s405, a signal receiving unit of the feedback part is responsible for receiving uplink data which is from a channel I receiving and transmitting antenna and is processed by a multichannel physical layer, wherein the uplink data comprises a broadcast frame, an RTS request frame, a CTS response frame, service data and the like, and service data such as unidirectional channel quality, RTS/CTS frame fragments and the like in the data are extracted and forwarded to a service processing feedback unit; S406, judging the data type after the service processing feedback unit acquires the service data from the signal receiving unit, and sending the data to the topology management unit for updating and maintaining the network topology if the data is of unidirectional channel quality; s407, when the time-frequency resource management unit receives the corresponding CTS response frame signal, marking that the service time slot is occupied.
6. The method for multi-channel ad hoc network hybrid access for multi-type services according to claim 1, wherein said step S5 comprises: When the multichannel physical layer carries out the receiving and transmitting conversion processing of data, after the modulation and coding operation is finished on downlink data from a channel transmitting unit and a channel two transmitting unit, the downlink data from the channel one transmitting unit is transmitted to a corresponding channel one receiving and transmitting antenna to transmit, and the downlink data from the channel two transmitting unit is transmitted to a channel two receiving and transmitting antenna to transmit; The multi-channel physical layer also decodes and demodulates the uplink data from the receiving and transmitting antenna and transmits the decoded and demodulated uplink data to the signal receiving unit after CRC check operation.

Description

Multi-channel Ad hoc network hybrid access method suitable for multi-type service Technical Field The invention relates to the field of ad hoc network access, in particular to a multichannel ad hoc network hybrid access method suitable for multiple types of services. Background The conventional wireless ad hoc network common access mode comprises a contention-type access mode, a scheduling-type access mode, a dynamic allocation access mode and a dynamic allocation mode, wherein the contention-type access mode is used for automatically determining when to transmit, and a back-off mechanism such as a CSMA/CA method is needed, the scheduling-type access mode is used for allocating time slots by a central node or a distributed coordinator in a network, the nodes transmit according to the allocated time slots such as a TDMA (time division multiple access) coordinated time slot allocation method, and the like. The contention-based access mode increases the collision probability at high load, resulting in a dip in throughput and time-frequency resource utilization. When the network topology changes dynamically, the dispatch access mode has complex resource reallocation and large end-to-end service transmission delay. The dynamic allocation access mode improves the adaptability of dynamic topology and load change, but the success rate of time slot competition scheduling is obviously reduced along with the increase of the node scale, and in addition, the competition scheduling cannot meet the low-delay transmission service requirements such as flight control signaling and the like. Disclosure of Invention The invention aims to overcome the defects of the prior art, provides a multi-channel ad hoc network hybrid access method suitable for multi-type services, and based on a dual-channel receiving architecture, by cooperatively broadcasting the type of the service to be transmitted and a target node number in a service channel, a multi-hop routing and time slot allocation scheme is quickly established by adopting an RTS request frame, a CTS response frame and a cooperative forwarding method, so that the time slot utilization rate is effectively improved, and the transmission delay of short services such as signaling is reduced. The invention aims at realizing the technical scheme that the multi-channel self-organizing network hybrid access method suitable for multi-type services comprises the following steps: S1, providing service data of multi-channel hybrid access through an application data layer; S2, after obtaining access data through a service type identification unit, judging the current service type, dividing the current service type into time-sensitive service and high-rate service, and making corresponding operations, namely Shi Min the service is sent to a first channel for processing, shi Min the high-rate service is sent to a route decision unit, and determining a time-frequency resource division scheme, S3, after the time-sensitive service enters the first channel, calculating a competition time slot, and completing data transmission in the corresponding competition time slot; s4, after the high-rate service enters a route decision unit, judging the route accessibility by combining a topology management unit, sending data under the condition that the route is reachable into a channel two, and carrying out time-frequency resource occupation and data issuing by combining the channel one; And S5, completing the receiving and transmitting conversion processing of the data through the multichannel physical layer. The invention has the beneficial effects that based on the dual-channel receiving architecture, the invention adopts RTS request frames, CTS response frames and cooperative forwarding methods to quickly establish multi-hop routing and time slot allocation schemes by cooperatively broadcasting the type of the service to be transmitted and the target node number in the service channel, and the signaling isochronous short service quickly transmits the service through the dynamic time slot of the service channel, and the video data stream and other services are transmitted through the reserved time slot, thereby effectively improving the time slot utilization rate and reducing the transmission delay of the signaling and other short services. Drawings FIG. 1 is a schematic diagram of the present invention; fig. 2 is a schematic diagram of a distribution of ad hoc network hybrid access time-frequency resources for multiple types of services; Fig. 3 is a schematic diagram of an RTS-CTS response of an ad hoc network hybrid access contention slot for multiple types of traffic. Detailed Description The technical solution of the present invention will be described in further detail with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description. Aiming at the problem that the data transmission low-delay and high-throughput requirements and the high