A method for optimizing terminal retransmission times in nb-iot network
A technology of retransmission times and optimization method, applied in the field of communication, can solve the problems of NB-IoT system burden, increase in retransmission times, etc., to achieve the effect of increasing probability and improving utilization efficiency
Active Publication Date: 2021-08-17
NORTHEASTERN UNIV LIAONING
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[0007] In order to solve the above-mentioned problems in the prior art, the present disclosure provides a method for optimizing the number of retransmissions of the terminal in the NB-IoT network, and solves the problem that the increase in the number of retransmissions in the prior art causes a serious burden to the NB-IoT system
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[0055] In order to better explain the present disclosure and facilitate understanding, the present disclosure will be described in detail below through specific implementation manners in conjunction with the accompanying drawings.
[0056] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terms used herein in the description of the present disclosure are for the purpose of describing specific embodiments only, and are not intended to limit the present disclosure. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0057] In related embodiments of the present disclosure, when a large number of out-of-order retransmissions of a large number of terminals in the network increase, the success probability of RACH of other users will be reduced, which will eventually cause a sharp decline in network perfor...
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The embodiment of the present disclosure relates to a method for optimizing the number of retransmissions of a terminal in an NB-IoT network, including: dividing channel resources in the NB-IoT network into multiple resource blocks and serializing them according to time to obtain a serialized resource block set; By matching the user with the serialized resource block set, and calculating the power function of the resource block based on the channel selected by the user and the number of retransmissions; the power function based on the resource block is combined with the greedy matching algorithm to realize the mapping relationship between the resource block and the user. And combining the matching pair crossover algorithm to stably optimize the mapping relationship between resource blocks and users, and determine the channel selected by the specific user in the NB-IoT network, the starting time on the channel and the number of retransmissions. The method provided in the present disclosure can simultaneously determine the channel used by each NB-IoT user, the starting time and the number of repeated message transmissions, thereby effectively improving the probability of NB-IoT users accessing the network and improving resource utilization efficiency.
Description
technical field [0001] The present disclosure relates to the field of communication technologies, and in particular to a method for optimizing the number of retransmissions of a terminal in an NB-IoT network. Background technique [0002] Narrow Band Internet of Things (NB-IoT) is a cellular network-based narrowband IoT technology defined by 3GPP, which can support a large number of IoT connections with low power consumption requirements, and can be widely used in smart meter reading, smart Parking, vehicle tracking, logistics monitoring, smart agriculture, forestry, animal husbandry and fishery and smart wear, smart home, smart community and other fields. [0003] The NB-IoT network originated from the mobile long-term evolution technology (Long-Term Evolution, referred to as LTE), but unlike LTE, the NB-IoT system only has a bandwidth of 180KHz for coverage enhancement, and uses a narrowband physical random access channel ( NarrowBand Physical Random Access Channel (NPRAC...
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IPC IPC(8): H04W24/02H04W72/04H04L1/18
CPCH04W24/02H04L1/18H04W4/70H04W72/53
Inventor 贾杰刘瑶陈剑王兴伟
Owner NORTHEASTERN UNIV LIAONING