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Backoff window distributed adjustment method for LTE and WiFi coexisting network

A technology of backoff window and adjustment method, applied in network planning, wireless communication, electrical components, etc., can solve problems such as affecting WiFi network performance

Active Publication Date: 2019-08-13
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, since LTE communication is characterized by continuous synchronous exclusive access in the licensed spectrum, the emergence of LTE in the unlicensed frequency band will inevitably affect the performance of WiFi networks.

Method used

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  • Backoff window distributed adjustment method for LTE and WiFi coexisting network
  • Backoff window distributed adjustment method for LTE and WiFi coexisting network
  • Backoff window distributed adjustment method for LTE and WiFi coexisting network

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Embodiment

[0064] With the increasing shortage of spectrum resources, the sharing of unlicensed frequency bands between LTE and WiFi has attracted more and more attention because it can effectively alleviate the spectrum shortage. This embodiment proposes a distributed adjustment method for node initial back-off windows when LTE and WiFi share an unlicensed frequency band, so as to maximize the throughput of the LTE and WiFi coexistence network under the 3GPP fair constraints.

[0065] figure 1 It is the LTE / WiFi coexistence network communication model diagram used in the embodiment of the present invention, such as figure 1 As shown, the present invention is applicable to the machine communication network scenario of "LTE network + WiFi network", and the characteristics of this type of communication network scenario include:

[0066] 1. LTE network and WiFi network share unlicensed frequency band.

[0067] 2. The nodes are randomly distributed in the network, the LTE base station and...

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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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14H04W74/08
CPCH04W16/14H04W74/0808
Inventor 孙兴华陈翔王玺钧陈立
Owner SUN YAT SEN UNIV
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