Carrier aggregation method and dynamic spectrum allocation method

Abstract

The invention discloses a carrier aggregation method and a dynamic spectrum allocation method for solving the problems of lower utilization rate and poorer flexibility in usage of the spectrum of a guard band in the prior art. The carrier aggregation method comprises the steps: in a first time zone, a wireless access point sends downlink signals to a user terminal by adopting a first band frequency band between a TDD (time division duplex) system and an FDD (frequency division duplex) system and a bidirectional communication frequency band of the TDD system; or / and in a second time zone, the wireless access point receives uplink signals sent by a second band frequency band between the TDD system and the FDD system and the bidirectional communication frequency band. By adopting the technical scheme disclosed by the invention, the utilization rate of the guard band is increased and the flexibility in usage of the spectrum of the guard band is improved.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a carrier aggregation method and a dynamic allocation method. Background technique [0002] At present, LTE-A (Long Term Evolution Advance, long-term evolution upgrade version) carrier aggregation in 3GPP (Third Generation Partnership Project) can not only achieve a large transmission bandwidth, but also can achieve flexible duplex For example, through carrier aggregation, it is possible to realize the combined use of bidirectionally used spectrum and unidirectionally used spectrum, thereby improving the spectrum utilization rate and the flexibility of spectrum use, thereby improving the efficiency of wireless communication systems in using spectrum in complex networking environments. effectiveness. [0003] In order to reduce the cost of network construction in an environment where 2G network systems, 3G network systems, and LTE systems coexist, operators use RAN S...

AI Technical Summary

Problems solved by technology

[0008] Adopt above-mentioned technical scheme, although the mode of introducing half-duplex FDD (being HD-FDD) on guard band can improve the utilization rate of guard band, still, there are following defects in introducing HD-FDD on this guard band: On the one hand, When the wireless access point uses the third frequency band to send downlink signals to the user terminal, the fifth frequency band is in an idle state; when the wireless access point uses the fifth frequency band to receive the uplink signal sent by the user terminal, the third frequency band is in an idle state. Therefore, using The prior art solution has the problem of low guard band utilization; on the other hand, two guard bands are needed to ensure normal two-way communication in the frequency band used by the two-wire, but in the actual network environment, it cannot be guaranteed that there are enough guard bands. Therefore, the existing technology has the problem of poor flexibility in the use of guard bands, which leads to unstable two-way communication using guard bands and poor system performance.

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