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Data frame distribution method and device and data transmission method and device

A distribution method and data transmission technology, applied in the direction of electrical components, wireless communication, etc., can solve the problems of LTE system occupying channels, WLAN system channel occupancy rate and throughput decrease, and reduce the channel utilization rate of unlicensed frequency bands, etc., to improve Utilization, the effect of improving channel occupancy and throughput

Active Publication Date: 2016-08-24
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, since the WLAN system complies with the MAC (Media Access Control, Media Access Control) layer protocol, it occupies the channel in a contention manner with conflict avoidance, while the LTE system does not have a conflict avoidance mechanism. When the WLAN system and the LTE system coexist, The WLAN system will frequently back off, while the LTE system will occupy the channel for a long time, resulting in a significant drop in the channel occupancy and throughput of the WLAN system, reducing the channel utilization of the unlicensed frequency band

Method used

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  • Data frame distribution method and device and data transmission method and device
  • Data frame distribution method and device and data transmission method and device
  • Data frame distribution method and device and data transmission method and device

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Embodiment 1

[0059] Such as figure 1 As shown, it is the first flow chart of the data frame allocation method provided by the embodiment of the present invention. This method is applied to the controller in the base station of the LTE system. The principle is: by adding a backoff to the frame of the existing LTE system Frame, so that when it coexists with the WLAN system, it retreats out of the channel after completing a data transmission, so as to increase the chance of the WLAN system occupying the channel for data transmission, and improve the utilization rate of the channel as a whole. The allocation methods for this data frame include:

[0060] S110. According to the time slot lengths of the sensing frame, transmission frame and backoff frame of the current frame period calculated in the previous frame period, allocate the sensing frame and transmission frame of the current frame period to the LTE system base station within the coverage An LTE user terminal; wherein, the perception f...

Embodiment 2

[0071] Such as image 3 As shown, it is the second flow chart of the data frame allocation method provided by the embodiment of the present invention, which can be regarded as the above-mentioned figure 1 An extension of the method shown that includes:

[0072] S310. Calculate the time slot lengths of the sensing frame, transmission frame and backoff frame of the current frame period according to the channel occupancy information of the unlicensed frequency band collected in the first predetermined time before the current moment and the channel occupancy information stored in history.

[0073] Specifically, the first predetermined duration is a preset time interval for collecting channel occupancy information of the unlicensed frequency band, which can be set freely. For example, a slot length of ten frame periods or a slot length of twenty frame periods, etc.

[0074] In this embodiment, the channel occupancy information includes the number of attempts to access the LTE sys...

Embodiment 3

[0089] Such as Figure 4 As mentioned above, it is a flow chart of the method for calculating the time slot length of the backoff frame in the data frame allocation method provided by the embodiment of the present invention. This method can be regarded as a specific implementation of the method for calculating the backoff frame in S310 above. Methods include:

[0090] S410. Calculate the probability of successful access according to the collected number of LTE system access attempts and the number of LTE system successful access times in the unlicensed frequency band within the first predetermined time period before the current moment.

[0091] Specifically, let the number of LTE system access attempts in the unlicensed frequency band within the first predetermined time before the current moment be N attempt , the number of successful accesses to the LTE system is N suc , then the successful access probability The calculation formula is

[0092] For example, if the LTE ...

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Abstract

The embodiments of the invention provide a data frame distribution method and device and a data transmission method and device. The data frame distribution method comprises the steps of: according to time slot lengths, calculated in the previous frame period, of a perception frame, transmission frame and a retreat frame of the current frame period, distributing the perception frame and the transmission frame of the current frame period to an LTE user terminal in the range covered by an LTE system base station; after detecting that the LTE user terminal successfully finish data transmission, distributing the retreat frame of the current frame period to the LTE user terminal, and enabling the LTE user terminal to retreat a channel according to the retreat frame. According to the invention, one retreat frame is added based on the frames of an existing LTE system, the channel occupancy of the LTE system is lowered, and the channel occupancy and the throughput capacity of a WLAN system are improved, so that the WLAN system and the LTE system can well coexist, and the utilization rate of unlicensed frequency bands is simultaneously improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a data frame allocation method and device, and a data transmission method and device. Background technique [0002] With the explosive development of mobile Internet and high-bandwidth data services, mobile data traffic, the number of mobile terminals, and the number of mechanical terminal connections have shown a blowout growth. [0003] The prior art discloses a LAA (Licensed-Assisted Access) technology, which utilizes the LTE system to access unlicensed frequency bands in a WLAN (Wireless Local Area Networks, wireless local area network) system environment. Add more available spectrum to meet user needs. [0004] The access process of the existing LTE (Long Term Evolution, long-term evolution technology) system unlicensed frequency band is mainly carried out through the way of listening first and speaking. Usually, the frame of the LTE system includes t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W72/08H04W74/08H04W72/54
CPCH04W72/0446H04W74/085H04W72/542
Inventor 张奇勋冯志勇杨拓郭春霞赵思雯
Owner BEIJING UNIV OF POSTS & TELECOMM
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