Transmission mode selection method and device and user equipment

Abstract

The invention discloses transmission mode selection method and device and user equipment. The method includes: acquiring channel matrix of subframes in an adaptive transmission cycle by channel estimation; calculating average channel capacity and average symbol error rate of each component carrier in the subframes in different transmission modes by the acquired channel matrix; and selecting a transmission mode combination, meeting the requirements for system transmission rate and system symbol error rate, for each component carrier according to the calculated average channel capacity and average symbol error rate. On the premise of random channels, the average channel capacity and average symbol error rate of each component carrier are traversed and calculated, the system requirements for transmission rate and symbol error rate are considered comprehensively, and accordingly user throughput is effectively increased with accurate transmission of user data guaranteed, and spectral efficiency of the user equipment is maximized.

Description

technical field [0001] The present invention relates to LTE evolution technology, in particular, to a transmission mode selection method, device and mobile terminal. Background technique [0002] The Long Term Evolution (LTE) system supports a maximum bandwidth of 20MHz, a peak downlink rate of up to 100Mbit / s, and an uplink peak rate of up to 50Mbit / s. Its follow-up evolution project (Long Term Evolution Advanced, LTE-A) system supports a maximum system bandwidth of 100MHz, requiring a peak downlink rate of 1Gbit / s and an uplink peak rate of 500Mbit / s. In order to meet the bandwidth and peak data rate requirements of the LTE-A system, and considering that it is difficult to find an entire frequency band sufficient to carry the 100MHz bandwidth of the LTE-A system in the existing frequency allocation methods and planning, 3GPP adopts Carrier Aggregation (CA) technology Multiple LTE R-compatible carriers (carriers defined by LTE-8), that is, component carriers (Component Car...

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Problems solved by technology

[0017] (1) In the scheme, the same transmission mode is used on each CC, without considering the different channel states of each CC. Generally, when the channel matrix is ​​good (for example, full rank), the spatial multiplexing transmission mode is adopted, which can satisfy the transmission requirements. The correct rate can increase the rate; on the contrary, if the rank is residual, spatial multiplexing will lead to a higher error rate, and at this time, transmit diversity is generally used;

[0018] (2) The starting point of various CA / MIMO configurations in the scheme is to meet the peak data rate requirements of LTE-A, without considering the reliability of data transmission, that is, each CC cannot be configured according to the UE's data rate requirements and target bit error rate transfer mode

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