Method and system for improving frequency spectrum efficiency of cellular communication system

Abstract

The invention discloses an improving cellular communication system spectrum efficiency method and system in the network communication technique domain, which comprises the following steps: the system uses mobile speed estimation device to estimate moving speed of mobile subscriber; the moving speed of mobile subscriber is sent to the base station; the base station adopts right method to send the data to the mobile user side according to the estimated mobile speed. The inventioin improves the spectrum efficiency of the honeycomb communication system.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method and system for improving spectrum efficiency of a cellular communication system. Background technique [0002] The successful application of 2G wireless cellular communication network has attracted much attention to the digital wireless voice service. However, in terms of data service, due to the low transmission rate of the 2G network and the long It is applied to short message services with small data volume and low delay requirements. [0003] In response to the shortcomings of 2G networks, the 3G wireless cellular standard uses more complex wireless communication technology, more integrated microelectronics technology and radio frequency technology, which makes the data transmission capability of the wireless cellular network qualitatively improved, such as the 3G standard WCDMA The R5 and R6 versions provide a peak downlink rate of 14Mbps. [0004] I...

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Problems solved by technology

[0002] The successful application of 2G wireless cellular communication network has attracted much attention to the digital wireless voice service, but in terms of data service, due to the low transmission rate of the 2G network and the large round-trip delay of wireless transmission, its application range is limited, making it only Applied to short message services with small data volume and low delay requirements

[0009] In the above scheduling process, the receiving end needs to feed back the channel quality to the sending end, for figure 1 In the system shown, it takes a certain amount of time and delay to measure channel information from the receiving end and feed it back to the transmitting end, but the fast fading is constantly changing. When the channel information is obtained at the transmitting end, the actual channel environment has been changed If it is different, then time or frequency scheduling cannot achieve the expected gain. Even for a TDD (Time Division Duplex) system that can directly measure uplink signals to obtain channel information, there is a difference between the channel information at the time of measurement and the channel information at the time of transmission. different

[0010] Therefore, when the moving speed of the mobile station is high to a certain extent, the channel information mastered by the transmitter becomes unreliable. When the change is large to a certain extent, the scheduling cannot make the best use of the wireless channel, which eventually leads to spectrum reduction in efficiency

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