Fair access method for terahertz wireless personal area network based on period simplification

Abstract

The invention belongs to the field of Terahertz wireless personal area networks and specifically relates to a time period reduction-based fair access method. The time period reduction-based fair access method can be used for mainly solving problems that a random access time period becomes redundant when a time slot request quantity is greater than a time slot quantity provided by two super frames via a relevant access method, that distributable time slots can hardly be completely distributed via a conventional fair access method, and that subsequent subframes are retransmitted unnecessarily via a conventional low time delay frame aggregation mechanism when length information of a subframe head is damaged; the method comprises operation of the following three time periods: beacon broadcast, data transmission and random access; in the beacon broadcast time period, the random access time period can be cancelled in a self-adaptive manner according to the size of the time slot request quantity, and time slots can be distributed to nodes in an ordered and fair way according to the size of the request quantity; in the data transmission time period, a frame aggregation mode is used for subjecting a subframe with maximum length to reverse aggregation operation, and therefore time slot utilization rates, network throughputs and data time delay performance can be improved while normal access to a Terahertz wireless personal area network can remain unaffected and node access fairness can be enuserd.

Description

technical field [0001] The invention belongs to the field of using terahertz wireless personal area network (terahertz wireless personal area network) technology, and in particular relates to the occasion of terahertz wireless personal area network using "TDMA+CSMA" hybrid access mode in the MAC layer of the network. Background technique [0002] Terahertz waves refer to electromagnetic waves with a frequency range of 0.1THz-10THz. Their wavelengths are smaller than millimeter waves and longer than infrared light waves. Therefore, they have the advantages of both, and can provide large bandwidth capacity while maintaining the stability of communication links. However, in actual communication, atmospheric attenuation (especially water vapor absorption) will affect the propagation distance of terahertz waves. Therefore, terahertz frequency band communication is currently considered more for short-distance wireless communication. A typical group The network application form is ...

AI Technical Summary

Problems solved by technology

[0018] In order to solve the three problems of wasting time slot resources in the existing terahertz wireless personal area network access method described above, the present invention proposes a new access method for terahertz wireless personal area network based on time simplification

[0019] The new access method of the terahertz wireless personal area network proposed by the present invention includes three new mechanisms of "adaptive cancellation of random access period", "ordered and fair time slot allocation based on request volume" and "subframe reverse aggregation". Solve the problem of redundancy in the RA period when the amount of time slot requests is greater than the capacity of two superframe time slots, solve the problem that time slot resources cannot be fully allocated while allocating time slots fairly, and reduce the time when subframe header errors The waste of time slot resources generated by the low-latency frame aggregation mechanism improves the utilization rate of time slots without affecting the normal access of the terahertz wireless personal area network and ensuring access fairness, which is beneficial to throughput and data delay and other performance improvements

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