Terminal retransmission frequency optimization method in NB-IoT network
A technology of retransmission times and optimization method, applied in the field of communication, can solve the problems of increased retransmission times, NB-IoT system burden, etc., to achieve the effect of increasing probability and improving utilization efficiency
Active Publication Date: 2019-09-13
NORTHEASTERN UNIV
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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 invention relates to a terminal retransmission frequency optimization method in an NB-IoT network, and the method comprises the steps: dividing channel resources in the NB-IoT network into a plurality of resource blocks, and carrying out the serialization according to the time, and obtaining a serialized resource block set; matching a user with a serialized resource block set, and calculating to obtain an efficacy function of a resource block according to a channel selected by the user and retransmission times; and realizing a mapping relationship between the resource block and the user based on the efficacy function of the resource block in combination with a greedy matching algorithm, performing stable optimization on the mapping relationship between the resource block and the user in combination with a matching pair cross algorithm, and determining a channel selected by the specific user in the NB-IoT network, a starting moment on the channel and retransmissiontimes. According to the method provided by the invention, the channel used by each NB-IoT user, the starting time and the number of times of repeatedly sending the message can be determined at the same time, so that the probability that the NB-IoT user accesses the network is effectively improved, and the utilization efficiency of resources is improved.
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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Login to View More 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