A Method for Interference Suppression and Information Transmission in Heterogeneous Networks
A technology for interference suppression and information transmission, which is applied in wireless communication, network planning, electrical components, etc., and can solve the problems of coexistence between LTE/LTE-A system and other systems, overlap of monitoring channels, and occupation of multiple LTE/LTE-APico stations and other issues to achieve the effects of interference suppression, performance improvement, and sufficient channel resources
Active Publication Date: 2018-09-07
BEIJING UNIV OF POSTS & TELECOMM
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[0009] However, the disadvantage of the above-mentioned CSAT mechanism is: when multiple LTE / LTE-A Pico stations occupy the same channel, since their carrier sense and data transmission time allocation are roughly the same, the parts of the listening channel will overlap a lot, which will result in multiple Two LTE / LTE-A Pico stations occupy the same channel, and the interference between nodes is relatively serious
[0012] However, the disadvantage of the above-mentioned coexistence mechanism based on time resource allocation is that vacating a part of the LTE / LTE-A subframe will reduce the throughput of the LTE / LTE-A system; at the same time, the above-mentioned subframe allocation mode is fixed, so there is no Enable efficient coexistence of LTE / LTE-A systems and other systems on license-free frequency bands
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[0042] In order to make the technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0043] The LTE / LTE-A system's allocation of channel resources is significantly different from that of general systems. For example, the LTE / LTE-A system generally divides the frequency band into multiple resource blocks (Resource Block, RB), and allocates the resource blocks to each user in the system according to the number of users and the quality of their channels. Allocation of resource blocks is determined by an LTE / LTE-A base station (evolved NodeB, eNB). The LTE / LTE-A base station can not only determine which resource blocks are occupied by which user, but also determine the number of resource blocks occupied by each user. That is to say, the LTE / LTE-A system is not a contention-based system. Therefore, when the channel is occupied by oth...
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The invention provides a method of interference rejection and information transmission in a heterogeneous network. The method comprises the steps of installing an adjusting period Tc with a preset first time length, and cutting the adjusting period into a plurality of time fragments with equal time lengths; installing each time fragment in the adjusting period to either an information transmission period Ton or an information channel monitoring period Toff randomly by nodes in the system; monitoring by the nodes in the system in a shared channel occupied by all Toffs in the existing adjusting period; adjusting the time ratio of the Ton to the Toff in a next adjusting period according to the occupation condition of the shared channel monitored when the existing adjusting period is completed, and taking the next adjusting period as an existing adjusting period. According to the method provided by the invention, the shared channel resources can be more uniformly distributed, and the performance of an LTE / LTE-A (Long Term Evolution / Long Term Evolution-Advanced) system can be improved when the LTE / LTE-A system and other systems coexist.
Description
technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for interference suppression and information transmission in a heterogeneous network. Background technique [0002] At present, many wireless network access technologies such as 802.11 (Wi-Fi), 802.15.1 (Bluetooth) and 802.15.4 (ZigBee) occupy the frequency band of 2.4GHz Industrial Scientific and Medical (Industrial Scientific and Medical, ISM) and 5GHz wireless information Transmission equipment frequency band (Unlicensed National Information Infrastructure, U-NII). These frequency bands are all license-free frequency bands, with huge available bandwidth and low frequency occupation fees. They are useful supplements to the 3GPP Long Term Evolution LTE / LTE-A (LTE-Advanced) network deployed by operators based on licensed frequency bands. However, to deploy the LTE / LTE-A system in the license-exempt frequency band, it is inevitable to consider the coexiste...
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IPC IPC(8): H04W24/02
CPCH04W16/14
Inventor 龙航邢旻瑶郑侃夏腾
Owner BEIJING UNIV OF POSTS & TELECOMM