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Neighbor Discovery Method Based on Adaptive Antenna Array in Wireless Ad Hoc Networks
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An adaptive antenna and neighbor discovery technology, which is applied in the field of communication, can solve the problem of directional imbalance in the transmission and reception gain of directional antennas, and achieve the effect of small MTTR value
Active Publication Date: 2021-05-14
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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On the other hand, the directional unbalanced characteristics of directional antenna transmission and reception gains will cause any two adjacent nodes to find each other only when their antenna directions are aligned with each other, which brings great benefits to neighbor discovery in wireless Ad hoc networks. took the challenge
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Embodiment 1
[0031] For a wireless Ad hoc network node that is numbered 4 binary sequences 1001 and the number of sectors is m=5, the present invention generates a clock-synchronized adaptive antenna array state switching sequence for it through the following steps:
[0032] Step 1. The 7 equal-length time slots that make up each antenna state switching cycle are as follows: figure 1 are marked as 0, 1,..., 6 respectively; each time slot is divided into 5 equal-length sub-slots, which are marked as 0, 1, 2, 3, 4 respectively; the m antenna fans of the node Zones are labeled 0,1,2,3,4 respectively.
[0033] Step 2. Express the number of 0 bits in the binary sequence 1001 as a 3-bit binary sequence 010, and add this newly generated binary sequence to the binary sequence 1001, thereby generating a 7-bit binary sequence 1001010.
[0034] Step 3. On the basis of the 7-bit binary sequence generated in step 2, the following rules are used to generate a clock synchronization adaptive antenna arr...
Embodiment 2
[0039] For a wireless Ad hoc network node that is numbered 4 binary sequences 1001 and the number of sectors is m=5, the present invention generates a clock asynchronous adaptive antenna array state switching sequence for it through the following steps:
[0040] Step 1. Mark the 16 equal-length time slots that make up each antenna state switching cycle as 0, 1, ..., 15; divide each time slot into 5 equal-length sub-slots, and mark them as 0, 1, ..., 15 respectively; 1, 2, 3, 4; mark the m antenna sectors of the node as 0, 1, 2, 3, 4 respectively.
[0041] Step 2. Expand the binary sequence 1001, first add the 4-bit binary sequence 0110 generated by inverting all 4 bits of the sequence, then add 4 bits 0, and finally add 4 bits 1, so that Generates a 16-bit binary sequence 1001011000001111.
[0042] Step 3. On the basis of the 16-bit binary sequence generated in step 2, the following rules are used to generate a clock asynchronous adaptive antenna array transceiver state switc...
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Abstract
The invention belongs to the technical field of communication, and in particular relates to a wireless ad hoc network neighbor discovery method based on an adaptive antenna array. The invention aims at the initialization / periodic networking requirements of the wireless ad hoc network based on the adaptive antenna array, and designs the switching sequence of the adaptive antenna array sending and receiving states suitable for neighbor discovery for each clock synchronous or asynchronous network node. The solution of the present invention can ensure that no matter how big the time difference is between two network nodes starting to execute the state switching sequence, they can always obtain at least one chance to discover each other within a limited time period. Compared with the existing adaptive antenna array state switching sequence suitable for neighbor discovery, the state switching sequence designed by the present invention has a smaller MTTR value, so that any two wireless ad hoc networks can be connected in a shorter period of time. Network nodes provide opportunities to discover each other.
Description
technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a wireless ad hoc network neighbor discovery method based on an adaptive antenna array. Background technique [0002] Wireless Ad hoc networks (or wireless self-organizing networks) do not require fixed infrastructure support, and have the characteristics of multi-hop, node mobility and peer status, and dynamic changes in network topology. They are especially suitable for battlefield communications, emergency rescue, Internet of Things and vehicle networking and other applications. In a wireless Ad hoc network, each node needs to perform the function of neighbor node discovery in the stages of networking, routing, and communication, and generate or update its neighbor node information and network topology in real time, so as to facilitate subsequent route discovery and data transmission. and other functions provide information basis. [0003] In the neighbor d...
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