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Narrowband internet-of-things wireless link protocol sub-layer AM entity data transmission adaptive method

A narrowband Internet of Things and wireless link technology, which is applied in the adaptive field of AM entity data transmission at the sublayer of the narrowband Internet of Things wireless link protocol, can solve problems such as sliding window blocking, low data transmission throughput, and long delay, and achieve Realize the effects of simplicity, low system resource loss, and reliable operation

Active Publication Date: 2018-10-12
SOUTHEAST UNIV +1
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Problems solved by technology

[0005] The purpose of the present invention is to provide an adaptive method for AM entity data transmission of the narrowband Internet of Things wireless link protocol sublayer, which can solve the problems of low throughput, long delay and sliding window blocking in the data transmission process

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  • Narrowband internet-of-things wireless link protocol sub-layer AM entity data transmission adaptive method
  • Narrowband internet-of-things wireless link protocol sub-layer AM entity data transmission adaptive method
  • Narrowband internet-of-things wireless link protocol sub-layer AM entity data transmission adaptive method

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Embodiment Construction

[0028] The technical solutions and beneficial effects of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0029] The NB-IoT RLC protocol sublayer maintains a sliding window mechanism, which maintains a sending sliding window for the RLC AM transmission entity and maintains a receiving sliding window for the RLC AM receiving entity. During data transmission, the packet data unit (Packet DataUnit, PDU) first enters the sending sliding window of the RLC transmission entity, and the sending sliding window sends the PDU in the sliding window to the bottom layer, and the RLC AM receiving entity receives the PDU from the bottom layer and puts it into the receiving sliding window. At the same time, the receiving sliding window needs to generate a status report of PDU reception and send it to the RLC AM transmission entity to realize the ARQ (Automatic Repeat Request) function of retransmitting unreceived PDUs to ensure the accurac...

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Abstract

The present invention discloses a narrowband IOT wireless link protocol sub-layer AM entity data transmission adaptive method, which comprises the following steps: step 1, an AM receiving entity acquires the number n of the currently transmitted status reports NACKs; step 2, the AM receiving entity, according to the number n of the NACKs, a reordering timer t-reordering and the system-allowed maximum transmission delay, calculates and updates the value of a status prohibition timer t-StatusProhibit parameter; step 3, an AM transmission entity calculates a threshold of triggering polling according to the sliding window length, the channel transmission rate s and a polling retransmission timer t-PollRetransmit, compares the threshold with the number of PDUs in the current transmit buffer, and triggers the polling when the threshold is greater. Such a method can solve the problems of low throughput, large delay, and sliding window blocking during data transmission.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to an adaptive method for AM entity data transmission of the sublayer AM entity of the narrowband Internet of Things wireless link protocol. Background technique [0002] With the rapid development of communication technology, mobile communication is moving from the connection between people to the connection between people and things and between things. The Internet of Everything is an inevitable trend. Compared with short-distance communication technologies such as Bluetooth and ZigBee, mobile cellular networks have the characteristics of wide coverage, mobility, and large number of connections. The NB-IoT evolved on the basis of the fourth-generation mobile communication, and is the link between objects. NB-IoT is an emerging technology in the field of Internet of Things, which supports the cellular data connection of low-power devices in the wide area network....

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L29/08
CPCH04L69/03H04L69/324
Inventor 赵炯刘昊姚国良
Owner SOUTHEAST UNIV
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