Competing approaches to access common frequency bands

Abstract

The invention provides a competition method for accessing public frequency band. The method of the present invention is applied to the scenario where the first type of user equipment and the second type of user equipment within the coverage area of ​​the wireless access device compete to access the public frequency band, first determine the first type of user equipment and the second type of user equipment based on the backoff mechanism The back-off time for the user equipment of the second type to access the public frequency band, wherein the back-off time is an integer multiple of at least one time slot; then, determine the second time based on the network service quality of the user equipment of the first type a priority for a type of user equipment to access the public frequency band, and adjust the backoff time of the first type of user equipment based on the priority, so as to avoid that the backoff time of the first type of user equipment differs from that of the second type of user equipment The backoff time of the user equipment creates contention conflicts. It can be seen that, in the present invention, the length of the adjusted backoff time is adjusted so that the user equipment of the first type does not generate contention conflicts with the user equipment of the second type.

Description

technical field [0001] The invention relates to a competition method, in particular to a competition method for accessing public frequency bands. Background technique [0002] D2D (Device to Device) communication is a novel direct communication technology between terminals applied in the cellular system, which allows mobile terminals to use the licensed frequency band of the cellular network for point-to-point communication under the control of the cellular network. D2D communication has gradually become a research hotspot in the field of wireless communication due to its advantages such as reducing terminal transmit power, prolonging battery life, enhancing multicast and broadcast transmission rates, and improving system spectrum efficiency. [0003] However, as spectrum resources become increasingly scarce, communication technologies based on LTE standards that can work in shared frequency bands (such as ISM frequency bands) are receiving more and more attention. The use ...

AI Technical Summary

Problems solved by technology

However, the existing LTE standard obviously cannot be applied to this kind of competition, so the most intuitive and effective method is to use the same media access mechanism (such as CSMA / CA mechanism) for D2D communication as WLAN users.

[0005] However, although the media access mechanism can effectively coordinate and manage the use of wireless channels by WLAN user equipment, this mechanism cannot coordinate the resource competition between multiple types of user equipment (such as LTE D2D user equipment and WLAN user equipment), and Once a large number of user equipment (for example, including D2D communication pairs and WLAN users) compete for the same frequency resource, it will cause serious contention conflicts

Specifically, when the back-off counters of the D2D user equipment pair and the WLAN user equipment decrease to zero at the same time, contention conflicts will occur between the two user equipments, which will lead to an increase in communication delay and a decrease in frequency band utilization.

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