Backoff window distributed adjustment method for LTE and WiFi coexisting network

Abstract

The invention discloses a distributed adjustment method for a node initial back-off window when an unlicensed frequency band is shared by LTE and WiFi. The LTE base station and the WiFi node share anunlicensed frequency band; the WiFi nodes comprise a WiFi wireless access point and a WiFi user node; the WiFi node accesses a channel by using a CSMA / CA protocol; and the LTE base station accesses the channel by using an LBT and backoff mechanism, and the LTE base station and the WiFi node adjust respective initial backoff window sizes in a distributed manner according to respective observed information so as to maximize the throughput of the LTE and WiFi coexisting network under the condition of meeting 3GPP fair limitation.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a distributed adjustment method of a node's initial backoff window when LTE and WiFi share an unlicensed frequency band. Background technique [0002] At present, the licensed spectrum in frequency bands below 6 GHz is increasingly tight, but on the other hand, unlicensed frequency bands have not been fully utilized. Therefore, offloading data traffic from licensed frequency bands to unlicensed frequency bands has attracted increasing attention from the industry. In the past few decades, mobile operators have shifted some data traffic from cellular networks to unlicensed frequency bands based on WiFi wireless access points to reduce the load on cellular networks. However, this requires mobile operators to resolve the complex interaction between two separate networks, namely LTE network and WiFi network. Recently, with the carrier aggregation technology of LTE, the...

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